/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2009 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "vrrpd_impl.h" /* * A VRRP router can be only start participating the VRRP protocol of a virtual * router when all the following conditions are met: * * - The VRRP router is enabled (vr->vvr_conf.vvc_enabled is _B_TRUE) * - The RX socket is successfully created over the physical interface to * receive the VRRP multicast advertisement. Note that one RX socket can * be shared by several VRRP routers configured over the same physical * interface. (See vrrpd_init_rxsock()) * - The TX socket is successfully created over the VNIC interface to send * the VRRP advertisment. (See vrrpd_init_txsock()) * - The primary IP address has been successfully selected over the physical * interface. (See vrrpd_select_primary()) * * If a VRRP router is enabled but the other conditions haven't be satisfied, * the router will be stay at the VRRP_STATE_INIT state. If all the above * conditions are met, the VRRP router will be transit to either * the VRRP_STATE_MASTER or the VRRP_STATE_BACKUP state, depends on the VRRP * protocol. */ #define skip_whitespace(p) while (isspace(*(p))) ++(p) #define BUFFSIZE 65536 #define VRRPCONF "/etc/inet/vrrp.conf" typedef struct vrrpd_rtsock_s { int vrt_af; /* address family */ int vrt_fd; /* socket for the PF_ROUTE msg */ iu_event_id_t vrt_eid; /* event ID */ } vrrpd_rtsock_t; static int vrrp_logflag = 0; boolean_t vrrp_debug_level = 0; iu_eh_t *vrrpd_eh = NULL; iu_tq_t *vrrpd_timerq = NULL; static vrrp_handle_t vrrpd_vh = NULL; static int vrrpd_cmdsock_fd = -1; /* socket to communicate */ /* between vrrpd/libvrrpadm */ static iu_event_id_t vrrpd_cmdsock_eid = -1; static int vrrpd_ctlsock_fd = -1; /* socket to bring up/down */ /* the virtual IP addresses */ static int vrrpd_ctlsock6_fd = -1; static vrrpd_rtsock_t vrrpd_rtsocks[2] = { {AF_INET, -1, -1}, {AF_INET6, -1, -1} }; static iu_timer_id_t vrrp_scan_timer_id = -1; TAILQ_HEAD(vrrp_vr_list_s, vrrp_vr_s); TAILQ_HEAD(vrrp_intf_list_s, vrrp_intf_s); static struct vrrp_vr_list_s vrrp_vr_list; static struct vrrp_intf_list_s vrrp_intf_list; static char vrrpd_conffile[MAXPATHLEN]; /* * Multicast address of VRRP advertisement in network byte order */ static vrrp_addr_t vrrp_muladdr4; static vrrp_addr_t vrrp_muladdr6; static int vrrpd_scan_interval = 20000; /* ms */ /* * macros to calculate skew_time and master_down_timer * * Note that the input is in centisecs and output are in msecs */ #define SKEW_TIME(pri, intv) ((intv) * (256 - (pri)) / 256) #define MASTER_DOWN_INTERVAL(pri, intv) (3 * (intv) + SKEW_TIME((pri), (intv))) #define SKEW_TIME_VR(vr) \ SKEW_TIME((vr)->vvr_conf.vvc_pri, (vr)->vvr_master_adver_int) #define MASTER_DOWN_INTERVAL_VR(vr) \ MASTER_DOWN_INTERVAL((vr)->vvr_conf.vvc_pri, (vr)->vvr_master_adver_int) #define VRRP_CONF_UPDATE 0x01 #define VRRP_CONF_DELETE 0x02 static char *af_str(int); static iu_tq_callback_t vrrp_adv_timeout; static iu_tq_callback_t vrrp_b2m_timeout; static iu_eh_callback_t vrrpd_sock_handler; static iu_eh_callback_t vrrpd_rtsock_handler; static iu_eh_callback_t vrrpd_cmdsock_handler; static int daemon_init(); static vrrp_err_t vrrpd_init(); static void vrrpd_fini(); static vrrp_err_t vrrpd_cmdsock_create(); static void vrrpd_cmdsock_destroy(); static vrrp_err_t vrrpd_rtsock_create(); static void vrrpd_rtsock_destroy(); static vrrp_err_t vrrpd_ctlsock_create(); static void vrrpd_ctlsock_destroy(); static void vrrpd_scan_timer(iu_tq_t *, void *); static void vrrpd_scan(int); static vrrp_err_t vrrpd_init_rxsock(vrrp_vr_t *); static void vrrpd_fini_rxsock(vrrp_vr_t *); static vrrp_err_t vrrpd_init_txsock(vrrp_vr_t *); static vrrp_err_t vrrpd_init_txsock_v4(vrrp_vr_t *); static vrrp_err_t vrrpd_init_txsock_v6(vrrp_vr_t *); static void vrrpd_fini_txsock(vrrp_vr_t *); static vrrp_err_t vrrpd_create_vr(vrrp_vr_conf_t *); static vrrp_err_t vrrpd_enable_vr(vrrp_vr_t *); static void vrrpd_disable_vr(vrrp_vr_t *, vrrp_intf_t *, boolean_t); static void vrrpd_delete_vr(vrrp_vr_t *); static vrrp_err_t vrrpd_create(vrrp_vr_conf_t *, boolean_t); static vrrp_err_t vrrpd_delete(const char *); static vrrp_err_t vrrpd_enable(const char *, boolean_t); static vrrp_err_t vrrpd_disable(const char *); static vrrp_err_t vrrpd_modify(vrrp_vr_conf_t *, uint32_t); static void vrrpd_list(vrid_t, char *, int, vrrp_ret_list_t *, size_t *); static void vrrpd_query(const char *, vrrp_ret_query_t *, size_t *); static boolean_t vrrp_rd_prop_name(vrrp_vr_conf_t *, const char *); static boolean_t vrrp_rd_prop_vrid(vrrp_vr_conf_t *, const char *); static boolean_t vrrp_rd_prop_af(vrrp_vr_conf_t *, const char *); static boolean_t vrrp_rd_prop_pri(vrrp_vr_conf_t *, const char *); static boolean_t vrrp_rd_prop_adver_int(vrrp_vr_conf_t *, const char *); static boolean_t vrrp_rd_prop_preempt(vrrp_vr_conf_t *, const char *); static boolean_t vrrp_rd_prop_accept(vrrp_vr_conf_t *, const char *); static boolean_t vrrp_rd_prop_ifname(vrrp_vr_conf_t *, const char *); static boolean_t vrrp_rd_prop_enabled(vrrp_vr_conf_t *, const char *); static int vrrp_wt_prop_name(vrrp_vr_conf_t *, char *, size_t); static int vrrp_wt_prop_vrid(vrrp_vr_conf_t *, char *, size_t); static int vrrp_wt_prop_af(vrrp_vr_conf_t *, char *, size_t); static int vrrp_wt_prop_pri(vrrp_vr_conf_t *, char *, size_t); static int vrrp_wt_prop_adver_int(vrrp_vr_conf_t *, char *, size_t); static int vrrp_wt_prop_preempt(vrrp_vr_conf_t *, char *, size_t); static int vrrp_wt_prop_accept(vrrp_vr_conf_t *, char *, size_t); static int vrrp_wt_prop_ifname(vrrp_vr_conf_t *, char *, size_t); static int vrrp_wt_prop_enabled(vrrp_vr_conf_t *, char *, size_t); static void vrrpd_cmd_create(void *, void *, size_t *); static void vrrpd_cmd_delete(void *, void *, size_t *); static void vrrpd_cmd_enable(void *, void *, size_t *); static void vrrpd_cmd_disable(void *, void *, size_t *); static void vrrpd_cmd_modify(void *, void *, size_t *); static void vrrpd_cmd_list(void *, void *, size_t *); static void vrrpd_cmd_query(void *, void *, size_t *); static vrrp_vr_t *vrrpd_lookup_vr_by_vrid(char *, vrid_t vrid_t, int); static vrrp_vr_t *vrrpd_lookup_vr_by_name(const char *); static vrrp_intf_t *vrrpd_lookup_if(const char *, int); static vrrp_err_t vrrpd_create_if(const char *, int, uint32_t, vrrp_intf_t **); static void vrrpd_delete_if(vrrp_intf_t *, boolean_t); static vrrp_err_t vrrpd_create_ip(vrrp_intf_t *, const char *, vrrp_addr_t *, uint64_t flags); static void vrrpd_delete_ip(vrrp_intf_t *, vrrp_ip_t *); static void vrrpd_init_ipcache(int); static void vrrpd_update_ipcache(int); static int vrrpd_walk_ipaddr(icfg_if_t *, void *); static vrrp_err_t vrrpd_add_ipaddr(char *, int, vrrp_addr_t *, int, uint64_t); static vrrp_ip_t *vrrpd_select_primary(vrrp_intf_t *); static void vrrpd_reselect_primary(vrrp_intf_t *); static void vrrpd_reenable_all_vr(); static void vrrpd_remove_if(vrrp_intf_t *, boolean_t); static uint16_t in_cksum(int, uint16_t, void *); static uint16_t vrrp_cksum4(struct in_addr *, struct in_addr *, uint16_t, vrrp_pkt_t *); static uint16_t vrrp_cksum6(struct in6_addr *, struct in6_addr *, uint16_t, vrrp_pkt_t *); static size_t vrrpd_build_vrrp(vrrp_vr_t *, uchar_t *, int, boolean_t); static void vrrpd_process_adv(vrrp_vr_t *, vrrp_addr_t *, vrrp_pkt_t *); static vrrp_err_t vrrpd_send_adv(vrrp_vr_t *, boolean_t); /* state transition functions */ static vrrp_err_t vrrpd_state_i2m(vrrp_vr_t *); static vrrp_err_t vrrpd_state_i2b(vrrp_vr_t *); static void vrrpd_state_m2i(vrrp_vr_t *); static void vrrpd_state_b2i(vrrp_vr_t *); static vrrp_err_t vrrpd_state_b2m(vrrp_vr_t *); static vrrp_err_t vrrpd_state_m2b(vrrp_vr_t *); static void vrrpd_state_trans(vrrp_state_t, vrrp_state_t, vrrp_vr_t *); static vrrp_err_t vrrpd_set_noaccept(vrrp_vr_t *, boolean_t); static vrrp_err_t vrrpd_virtualip_update(vrrp_vr_t *, boolean_t); static vrrp_err_t vrrpd_virtualip_updateone(vrrp_intf_t *, vrrp_ip_t *, boolean_t); static int vrrpd_post_event(const char *, vrrp_state_t, vrrp_state_t); static void vrrpd_initconf(); static vrrp_err_t vrrpd_updateconf(vrrp_vr_conf_t *, uint_t); static vrrp_err_t vrrpd_write_vrconf(char *, size_t, vrrp_vr_conf_t *); static vrrp_err_t vrrpd_read_vrconf(char *, vrrp_vr_conf_t *); static vrrp_err_t vrrpd_readprop(const char *, vrrp_vr_conf_t *); static void vrrpd_cleanup(); static void vrrp_log(int, char *, ...); static int timeval_to_milli(struct timeval); static struct timeval timeval_delta(struct timeval, struct timeval); typedef struct vrrpd_prop_s { char *vs_propname; boolean_t (*vs_propread)(vrrp_vr_conf_t *, const char *); int (*vs_propwrite)(vrrp_vr_conf_t *, char *, size_t); } vrrp_prop_t; /* * persistent VRRP properties array */ static vrrp_prop_t vrrp_prop_info_tbl[] = { {"name", vrrp_rd_prop_name, vrrp_wt_prop_name}, {"vrid", vrrp_rd_prop_vrid, vrrp_wt_prop_vrid}, {"priority", vrrp_rd_prop_pri, vrrp_wt_prop_pri}, {"adv_intval", vrrp_rd_prop_adver_int, vrrp_wt_prop_adver_int}, {"preempt_mode", vrrp_rd_prop_preempt, vrrp_wt_prop_preempt}, {"accept_mode", vrrp_rd_prop_accept, vrrp_wt_prop_accept}, {"interface", vrrp_rd_prop_ifname, vrrp_wt_prop_ifname}, {"af", vrrp_rd_prop_af, vrrp_wt_prop_af}, {"enabled", vrrp_rd_prop_enabled, vrrp_wt_prop_enabled} }; #define VRRP_PROP_INFO_TABSIZE \ (sizeof (vrrp_prop_info_tbl) / sizeof (vrrp_prop_t)) typedef void vrrp_cmd_func_t(void *, void *, size_t *); typedef struct vrrp_cmd_info_s { vrrp_cmd_type_t vi_cmd; size_t vi_reqsize; size_t vi_acksize; /* 0 if the size is variable */ boolean_t vi_setop; /* Set operation? Check credentials */ vrrp_cmd_func_t *vi_cmdfunc; } vrrp_cmd_info_t; static vrrp_cmd_info_t vrrp_cmd_info_tbl[] = { {VRRP_CMD_CREATE, sizeof (vrrp_cmd_create_t), sizeof (vrrp_ret_create_t), _B_TRUE, vrrpd_cmd_create}, {VRRP_CMD_DELETE, sizeof (vrrp_cmd_delete_t), sizeof (vrrp_ret_delete_t), _B_TRUE, vrrpd_cmd_delete}, {VRRP_CMD_ENABLE, sizeof (vrrp_cmd_enable_t), sizeof (vrrp_ret_enable_t), _B_TRUE, vrrpd_cmd_enable}, {VRRP_CMD_DISABLE, sizeof (vrrp_cmd_disable_t), sizeof (vrrp_ret_disable_t), _B_TRUE, vrrpd_cmd_disable}, {VRRP_CMD_MODIFY, sizeof (vrrp_cmd_modify_t), sizeof (vrrp_ret_modify_t), _B_TRUE, vrrpd_cmd_modify}, {VRRP_CMD_QUERY, sizeof (vrrp_cmd_query_t), 0, _B_FALSE, vrrpd_cmd_query}, {VRRP_CMD_LIST, sizeof (vrrp_cmd_list_t), 0, _B_FALSE, vrrpd_cmd_list} }; #define VRRP_DOOR_INFO_TABLE_SIZE \ (sizeof (vrrp_cmd_info_tbl) / sizeof (vrrp_cmd_info_t)) static int ipaddr_cmp(int af, vrrp_addr_t *addr1, vrrp_addr_t *addr2) { if (af == AF_INET) { return (memcmp(&addr1->in4.sin_addr, &addr2->in4.sin_addr, sizeof (struct in_addr))); } else { return (memcmp(&addr1->in6.sin6_addr, &addr2->in6.sin6_addr, sizeof (struct in6_addr))); } } static vrrp_vr_t * vrrpd_lookup_vr_by_vrid(char *ifname, vrid_t vrid, int af) { vrrp_vr_t *vr; TAILQ_FOREACH(vr, &vrrp_vr_list, vvr_next) { if (strcmp(vr->vvr_conf.vvc_link, ifname) == 0 && vr->vvr_conf.vvc_vrid == vrid && vr->vvr_conf.vvc_af == af) { break; } } return (vr); } static vrrp_vr_t * vrrpd_lookup_vr_by_name(const char *name) { vrrp_vr_t *vr; TAILQ_FOREACH(vr, &vrrp_vr_list, vvr_next) { if (strcmp(vr->vvr_conf.vvc_name, name) == 0) break; } return (vr); } static vrrp_intf_t * vrrpd_lookup_if(const char *ifname, int af) { vrrp_intf_t *intf; TAILQ_FOREACH(intf, &vrrp_intf_list, vvi_next) { if (strcmp(ifname, intf->vvi_ifname) == 0 && af == intf->vvi_af) { break; } } return (intf); } static vrrp_err_t vrrpd_create_if(const char *ifname, int af, uint32_t ifindex, vrrp_intf_t **intfp) { vrrp_intf_t *intf; vrrp_log(VRRP_DBG0, "vrrpd_create_if(%s, %s, %d)", ifname, af_str(af), ifindex); if (((*intfp) = malloc(sizeof (vrrp_intf_t))) == NULL) { vrrp_log(VRRP_ERR, "vrrpd_create_if(): failed to " "allocate %s/%s interface", ifname, af_str(af)); return (VRRP_ENOMEM); } intf = *intfp; TAILQ_INIT(&intf->vvi_iplist); (void) strlcpy(intf->vvi_ifname, ifname, sizeof (intf->vvi_ifname)); intf->vvi_af = af; intf->vvi_sockfd = -1; intf->vvi_nvr = 0; intf->vvi_eid = -1; intf->vvi_pip = NULL; intf->vvi_ifindex = ifindex; intf->vvi_state = NODE_STATE_NEW; intf->vvi_vr_state = VRRP_STATE_INIT; TAILQ_INSERT_TAIL(&vrrp_intf_list, intf, vvi_next); return (VRRP_SUCCESS); } /* * An interface is deleted. If update_vr is true, the deletion of the interface * may cause the state transition of assoicated VRRP router (if this interface * is either the primary or the VNIC interface of the VRRP router); otherwise, * simply delete the interface without updating the VRRP router. */ static void vrrpd_delete_if(vrrp_intf_t *intf, boolean_t update_vr) { vrrp_ip_t *ip; vrrp_log(VRRP_DBG0, "vrrpd_delete_if(%s, %s, %supdate_vr)", intf->vvi_ifname, af_str(intf->vvi_af), update_vr ? "" : "no_"); if (update_vr) { /* * If a this interface is the physical interface or the VNIC * of a VRRP router, the deletion of the interface (no IP * address exists on this interface) may cause the state * transition of the VRRP router. call vrrpd_remove_if() * to find all corresponding VRRP router and update their * states. */ vrrpd_remove_if(intf, _B_FALSE); } /* * First remove and delete all the IP addresses on the interface */ while (!TAILQ_EMPTY(&intf->vvi_iplist)) { ip = TAILQ_FIRST(&intf->vvi_iplist); vrrpd_delete_ip(intf, ip); } /* * Then remove and delete the interface */ TAILQ_REMOVE(&vrrp_intf_list, intf, vvi_next); (void) free(intf); } static vrrp_err_t vrrpd_create_ip(vrrp_intf_t *intf, const char *lifname, vrrp_addr_t *addr, uint64_t flags) { vrrp_ip_t *ip; char abuf[INET6_ADDRSTRLEN]; /* LINTED E_CONSTANT_CONDITION */ VRRPADDR2STR(intf->vvi_af, addr, abuf, INET6_ADDRSTRLEN, _B_FALSE); vrrp_log(VRRP_DBG0, "vrrpd_create_ip(%s, %s, %s, 0x%x)", intf->vvi_ifname, lifname, abuf, flags); if ((ip = malloc(sizeof (vrrp_ip_t))) == NULL) { vrrp_log(VRRP_ERR, "vrrpd_create_ip(%s, %s):" "failed to allocate IP", lifname, abuf); return (VRRP_ENOMEM); } (void) strncpy(ip->vip_lifname, lifname, sizeof (ip->vip_lifname)); ip->vip_state = NODE_STATE_NEW; ip->vip_flags = flags; (void) memcpy(&ip->vip_addr, addr, sizeof (ip->vip_addr)); /* * Make sure link-local IPv6 IP addresses are at the head of the list */ if (intf->vvi_af == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&addr->in6.sin6_addr)) { TAILQ_INSERT_HEAD(&intf->vvi_iplist, ip, vip_next); } else { TAILQ_INSERT_TAIL(&intf->vvi_iplist, ip, vip_next); } return (VRRP_SUCCESS); } static void vrrpd_delete_ip(vrrp_intf_t *intf, vrrp_ip_t *ip) { char abuf[INET6_ADDRSTRLEN]; int af = intf->vvi_af; /* LINTED E_CONSTANT_CONDITION */ VRRPADDR2STR(af, &ip->vip_addr, abuf, sizeof (abuf), _B_FALSE); vrrp_log(VRRP_DBG0, "vrrpd_delete_ip(%s, %s, %s) is %sprimary", intf->vvi_ifname, ip->vip_lifname, abuf, intf->vvi_pip == ip ? "" : "not "); if (intf->vvi_pip == ip) intf->vvi_pip = NULL; TAILQ_REMOVE(&intf->vvi_iplist, ip, vip_next); (void) free(ip); } static char * rtm_event2str(uchar_t event) { switch (event) { case RTM_NEWADDR: return ("RTM_NEWADDR"); case RTM_DELADDR: return ("RTM_DELADDR"); case RTM_IFINFO: return ("RTM_IFINFO"); case RTM_ADD: return ("RTM_ADD"); case RTM_DELETE: return ("RTM_DELETE"); case RTM_CHANGE: return ("RTM_CHANGE"); case RTM_OLDADD: return ("RTM_OLDADD"); case RTM_OLDDEL: return ("RTM_OLDDEL"); case RTM_CHGADDR: return ("RTM_CHGADDR"); case RTM_FREEADDR: return ("RTM_FREEADDR"); default: return ("RTM_OTHER"); } } int main(int argc, char *argv[]) { int c, err; struct sigaction sa; sigset_t mask; struct rlimit rl; (void) setlocale(LC_ALL, ""); (void) textdomain(TEXT_DOMAIN); /* * We need PRIV_SYS_CONFIG to post VRRP sysevent, PRIV_NET_RAWACESS * and PRIV_NET_ICMPACCESS to open the raw socket, PRIV_SYS_IP_CONFIG * to bring up/down the virtual IP addresses, and PRIV_SYS_RESOURCE to * setrlimit(). * * Note that sysevent is not supported in non-global zones. */ if (getzoneid() == GLOBAL_ZONEID) { err = __init_daemon_priv(PU_RESETGROUPS|PU_CLEARLIMITSET, 0, 0, PRIV_SYS_CONFIG, PRIV_NET_RAWACCESS, PRIV_NET_ICMPACCESS, PRIV_SYS_IP_CONFIG, PRIV_SYS_RESOURCE, NULL); } else { err = __init_daemon_priv(PU_RESETGROUPS|PU_CLEARLIMITSET, 0, 0, PRIV_NET_RAWACCESS, PRIV_NET_ICMPACCESS, PRIV_SYS_IP_CONFIG, PRIV_SYS_RESOURCE, NULL); } if (err == -1) { vrrp_log(VRRP_ERR, "main(): init_daemon_priv() failed"); return (EXIT_FAILURE); } /* * If vrrpd is started by other process, it will inherit the * signal block mask. We unblock all signals to make sure the * signal handling will work normally. */ (void) sigfillset(&mask); (void) thr_sigsetmask(SIG_UNBLOCK, &mask, NULL); sa.sa_handler = vrrpd_cleanup; sa.sa_flags = 0; (void) sigemptyset(&sa.sa_mask); (void) sigaction(SIGINT, &sa, NULL); (void) sigaction(SIGQUIT, &sa, NULL); (void) sigaction(SIGTERM, &sa, NULL); vrrp_debug_level = 0; (void) strlcpy(vrrpd_conffile, VRRPCONF, sizeof (vrrpd_conffile)); while ((c = getopt(argc, argv, "d:f:")) != EOF) { switch (c) { case 'd': vrrp_debug_level = atoi(optarg); break; case 'f': (void) strlcpy(vrrpd_conffile, optarg, sizeof (vrrpd_conffile)); break; default: break; } } closefrom(3); if (vrrp_debug_level == 0 && (daemon_init() != 0)) { vrrp_log(VRRP_ERR, "main(): daemon_init() failed"); return (EXIT_FAILURE); } rl.rlim_cur = RLIM_INFINITY; rl.rlim_max = RLIM_INFINITY; if (setrlimit(RLIMIT_NOFILE, &rl) == -1) { vrrp_log(VRRP_ERR, "main(): setrlimit() failed"); return (EXIT_FAILURE); } if (vrrpd_init() != VRRP_SUCCESS) { vrrp_log(VRRP_ERR, "main(): vrrpd_init() failed"); return (EXIT_FAILURE); } /* * Get rid of unneeded privileges. */ __fini_daemon_priv(PRIV_PROC_FORK, PRIV_PROC_EXEC, PRIV_PROC_SESSION, PRIV_FILE_LINK_ANY, PRIV_PROC_INFO, PRIV_SYS_RESOURCE, NULL); /* * Read the configuration and initialize the existing VRRP * configuration */ vrrpd_initconf(); /* * Start the loop to handle the timer and the IO events. */ switch (iu_handle_events(vrrpd_eh, vrrpd_timerq)) { case -1: vrrp_log(VRRP_ERR, "main(): iu_handle_events() failed " "abnormally"); break; default: break; } vrrpd_cleanup(); return (EXIT_SUCCESS); } static int daemon_init() { pid_t pid; vrrp_log(VRRP_DBG0, "daemon_init()"); if (getenv("SMF_FMRI") == NULL) { vrrp_log(VRRP_ERR, "main(): vrrpd is an smf(5) managed service " "and should not be run from the command line."); return (-1); } if ((pid = fork()) < 0) return (-1); if (pid != 0) { /* in parent process: do nothing. */ exit(0); } /* * in child process, became a daemon, and return to main() to continue. */ (void) chdir("/"); (void) setsid(); (void) close(0); (void) close(1); (void) close(2); (void) open("/dev/null", O_RDWR, 0); (void) dup2(0, 1); (void) dup2(0, 2); openlog("vrrpd", LOG_PID, LOG_DAEMON); vrrp_logflag = 1; return (0); } static vrrp_err_t vrrpd_init() { vrrp_err_t err = VRRP_ESYS; vrrp_log(VRRP_DBG0, "vrrpd_init()"); TAILQ_INIT(&vrrp_vr_list); TAILQ_INIT(&vrrp_intf_list); if (vrrp_open(&vrrpd_vh) != VRRP_SUCCESS) { vrrp_log(VRRP_ERR, "vrrpd_init(): vrrp_open() failed"); goto fail; } if ((vrrpd_timerq = iu_tq_create()) == NULL) { vrrp_log(VRRP_ERR, "vrrpd_init(): iu_tq_create() failed"); goto fail; } if ((vrrpd_eh = iu_eh_create()) == NULL) { vrrp_log(VRRP_ERR, "vrrpd_init(): iu_eh_create() failed"); goto fail; } /* * Create the AF_UNIX socket used to communicate with libvrrpadm. * * This socket is used to receive the administrative requests and * send back the results. */ if (vrrpd_cmdsock_create() != VRRP_SUCCESS) { vrrp_log(VRRP_ERR, "vrrpd_init(): vrrpd_cmdsock_create() " "failed"); goto fail; } /* * Create the VRRP control socket used to bring up/down the virtual * IP addresses. It is also used to set the IFF_NOACCEPT flag of * the virtual IP addresses. */ if (vrrpd_ctlsock_create() != VRRP_SUCCESS) { vrrp_log(VRRP_ERR, "vrrpd_init(): vrrpd_ctlsock_create() " "failed"); goto fail; } /* * Create the PF_ROUTER socket used to listen to the routing socket * messages and build the interface/IP address list. */ if (vrrpd_rtsock_create() != VRRP_SUCCESS) { vrrp_log(VRRP_ERR, "vrrpd_init(): vrrpd_rtsock_create() " "failed"); goto fail; } /* * Build the list of interfaces and IP addresses. Also, start the time * to scan the interfaces/IP addresses periodically. */ vrrpd_scan(AF_INET); vrrpd_scan(AF_INET6); if ((vrrp_scan_timer_id = iu_schedule_timer_ms(vrrpd_timerq, vrrpd_scan_interval, vrrpd_scan_timer, NULL)) == -1) { vrrp_log(VRRP_ERR, "vrrpd_init(): start scan_timer failed"); goto fail; } /* * Initialize the VRRP multicast address. */ bzero(&vrrp_muladdr4, sizeof (vrrp_addr_t)); vrrp_muladdr4.in4.sin_family = AF_INET; (void) inet_pton(AF_INET, "224.0.0.18", &vrrp_muladdr4.in4.sin_addr); bzero(&vrrp_muladdr6, sizeof (vrrp_addr_t)); vrrp_muladdr6.in6.sin6_family = AF_INET6; (void) inet_pton(AF_INET6, "ff02::12", &vrrp_muladdr6.in6.sin6_addr); return (VRRP_SUCCESS); fail: vrrpd_fini(); return (err); } static void vrrpd_fini() { vrrp_log(VRRP_DBG0, "vrrpd_fini()"); (void) iu_cancel_timer(vrrpd_timerq, vrrp_scan_timer_id, NULL); vrrp_scan_timer_id = -1; vrrpd_rtsock_destroy(); vrrpd_ctlsock_destroy(); vrrpd_cmdsock_destroy(); if (vrrpd_eh != NULL) { iu_eh_destroy(vrrpd_eh); vrrpd_eh = NULL; } if (vrrpd_timerq != NULL) { iu_tq_destroy(vrrpd_timerq); vrrpd_timerq = NULL; } vrrp_close(vrrpd_vh); vrrpd_vh = NULL; assert(TAILQ_EMPTY(&vrrp_vr_list)); assert(TAILQ_EMPTY(&vrrp_intf_list)); } static void vrrpd_cleanup(void) { vrrp_vr_t *vr; vrrp_intf_t *intf; vrrp_log(VRRP_DBG0, "vrrpd_cleanup()"); while (!TAILQ_EMPTY(&vrrp_vr_list)) { vr = TAILQ_FIRST(&vrrp_vr_list); vrrpd_delete_vr(vr); } while (!TAILQ_EMPTY(&vrrp_intf_list)) { intf = TAILQ_FIRST(&vrrp_intf_list); vrrpd_delete_if(intf, _B_FALSE); } vrrpd_fini(); closelog(); exit(1); } /* * Read the configuration file and initialize all the existing VRRP routers. */ static void vrrpd_initconf() { FILE *fp; char line[LINE_MAX]; int linenum = 0; vrrp_vr_conf_t conf; vrrp_err_t err; vrrp_log(VRRP_DBG0, "vrrpd_initconf()"); if ((fp = fopen(vrrpd_conffile, "rF")) == NULL) { vrrp_log(VRRP_ERR, "failed to open the configuration file %s", vrrpd_conffile); return; } while (fgets(line, sizeof (line), fp) != NULL) { linenum++; conf.vvc_vrid = VRRP_VRID_NONE; if ((err = vrrpd_read_vrconf(line, &conf)) != VRRP_SUCCESS) { vrrp_log(VRRP_ERR, "failed to parse %d line %s", linenum, line); continue; } /* * Blank or comment line */ if (conf.vvc_vrid == VRRP_VRID_NONE) continue; /* * No need to update the configuration since the VRRP router * created/enabled based on the existing configuration. */ if ((err = vrrpd_create(&conf, _B_FALSE)) != VRRP_SUCCESS) { vrrp_log(VRRP_ERR, "VRRP router %s creation failed: " "%s", conf.vvc_name, vrrp_err2str(err)); continue; } if (conf.vvc_enabled && ((err = vrrpd_enable(conf.vvc_name, _B_FALSE)) != VRRP_SUCCESS)) { vrrp_log(VRRP_ERR, "VRRP router %s enable failed: %s", conf.vvc_name, vrrp_err2str(err)); } } (void) fclose(fp); } /* * Create the AF_UNIX socket used to communicate with libvrrpadm. * * This socket is used to receive the administrative request and * send back the results. */ static vrrp_err_t vrrpd_cmdsock_create() { iu_event_id_t eid; struct sockaddr_un laddr; int sock, flags; vrrp_log(VRRP_DBG0, "vrrpd_cmdsock_create()"); if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { vrrp_log(VRRP_ERR, "vrrpd_cmdsock_create(): socket(AF_UNIX) " "failed: %s", strerror(errno)); return (VRRP_ESYS); } /* * Set it to be non-blocking. */ flags = fcntl(sock, F_GETFL, 0); (void) fcntl(sock, F_SETFL, (flags | O_NONBLOCK)); /* * Unlink first in case a previous daemon instance exited ungracefully. */ (void) unlink(VRRPD_SOCKET); bzero(&laddr, sizeof (laddr)); laddr.sun_family = AF_UNIX; (void) strlcpy(laddr.sun_path, VRRPD_SOCKET, sizeof (laddr.sun_path)); if (bind(sock, (struct sockaddr *)&laddr, sizeof (laddr)) < 0) { vrrp_log(VRRP_ERR, "vrrpd_cmdsock_create(): bind() failed: %s", strerror(errno)); (void) close(sock); return (VRRP_ESYS); } if (listen(sock, 30) < 0) { vrrp_log(VRRP_ERR, "vrrpd_cmdsock_create(): listen() " "failed: %s", strerror(errno)); (void) close(sock); return (VRRP_ESYS); } if ((eid = iu_register_event(vrrpd_eh, sock, POLLIN, vrrpd_cmdsock_handler, NULL)) == -1) { vrrp_log(VRRP_ERR, "vrrpd_cmdsock_create(): iu_register_event()" " failed"); (void) close(sock); return (VRRP_ESYS); } vrrpd_cmdsock_fd = sock; vrrpd_cmdsock_eid = eid; return (VRRP_SUCCESS); } static void vrrpd_cmdsock_destroy() { vrrp_log(VRRP_DBG0, "vrrpd_cmdsock_destroy()"); (void) iu_unregister_event(vrrpd_eh, vrrpd_cmdsock_eid, NULL); (void) close(vrrpd_cmdsock_fd); vrrpd_cmdsock_fd = -1; vrrpd_cmdsock_eid = -1; } /* * Create the PF_ROUTER sockets used to listen to the routing socket * messages and build the interface/IP address list. Create one for * each address family (IPv4 and IPv6). */ static vrrp_err_t vrrpd_rtsock_create() { int i, flags, sock; iu_event_id_t eid; vrrp_log(VRRP_DBG0, "vrrpd_rtsock_create()"); for (i = 0; i < 2; i++) { sock = socket(PF_ROUTE, SOCK_RAW, vrrpd_rtsocks[i].vrt_af); if (sock == -1) { vrrp_log(VRRP_ERR, "vrrpd_rtsock_create(): socket() " "failed: %s", strerror(errno)); break; } /* * Set it to be non-blocking. */ if ((flags = fcntl(sock, F_GETFL, 0)) < 0) { vrrp_log(VRRP_ERR, "vrrpd_rtsock_create(): " "fcntl(F_GETFL) failed: %s", strerror(errno)); break; } if ((fcntl(sock, F_SETFL, flags | O_NONBLOCK)) < 0) { vrrp_log(VRRP_ERR, "vrrpd_rtsock_create(): " "fcntl(F_SETFL) failed: %s", strerror(errno)); break; } if ((eid = iu_register_event(vrrpd_eh, sock, POLLIN, vrrpd_rtsock_handler, &(vrrpd_rtsocks[i].vrt_af))) == -1) { vrrp_log(VRRP_ERR, "vrrpd_rtsock_create(): register " "rtsock %d(%s) failed", sock, af_str(vrrpd_rtsocks[i].vrt_af)); break; } vrrpd_rtsocks[i].vrt_fd = sock; vrrpd_rtsocks[i].vrt_eid = eid; } if (i != 2) { (void) close(sock); vrrpd_rtsock_destroy(); return (VRRP_ESYS); } return (VRRP_SUCCESS); } static void vrrpd_rtsock_destroy() { int i; vrrp_log(VRRP_DBG0, "vrrpd_rtsock_destroy()"); for (i = 0; i < 2; i++) { (void) iu_unregister_event(vrrpd_eh, vrrpd_rtsocks[i].vrt_eid, NULL); (void) close(vrrpd_rtsocks[i].vrt_fd); vrrpd_rtsocks[i].vrt_eid = -1; vrrpd_rtsocks[i].vrt_fd = -1; } } /* * Create the VRRP control socket used to bring up/down the virtual * IP addresses. It is also used to set the IFF_NOACCEPT flag of * the virtual IP addresses. */ static vrrp_err_t vrrpd_ctlsock_create() { int s, s6; int on = _B_TRUE; if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { vrrp_log(VRRP_ERR, "vrrpd_ctlsock_create(): socket(INET) " "failed: %s", strerror(errno)); return (VRRP_ESYS); } if (setsockopt(s, SOL_SOCKET, SO_VRRP, &on, sizeof (on)) < 0) { vrrp_log(VRRP_ERR, "vrrpd_ctlsock_create(): " "setsockopt(INET, SO_VRRP) failed: %s", strerror(errno)); (void) close(s); return (VRRP_ESYS); } if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { vrrp_log(VRRP_ERR, "vrrpd_ctlsock_create(): socket(INET6) " "failed: %s", strerror(errno)); (void) close(s); return (VRRP_ESYS); } if (setsockopt(s6, SOL_SOCKET, SO_VRRP, &on, sizeof (on)) < 0) { vrrp_log(VRRP_ERR, "vrrpd_ctlsock_create(): " "setsockopt(INET6, SO_VRRP) failed: %s", strerror(errno)); (void) close(s); (void) close(s6); return (VRRP_ESYS); } vrrpd_ctlsock_fd = s; vrrpd_ctlsock6_fd = s6; return (VRRP_SUCCESS); } static void vrrpd_ctlsock_destroy() { (void) close(vrrpd_ctlsock_fd); vrrpd_ctlsock_fd = -1; (void) close(vrrpd_ctlsock6_fd); vrrpd_ctlsock6_fd = -1; } /*ARGSUSED*/ static void vrrpd_cmd_create(void *arg1, void *arg2, size_t *arg2_sz) { vrrp_cmd_create_t *cmd = (vrrp_cmd_create_t *)arg1; vrrp_ret_create_t *ret = (vrrp_ret_create_t *)arg2; vrrp_err_t err; err = vrrpd_create(&cmd->vcc_conf, _B_TRUE); if (err == VRRP_SUCCESS && cmd->vcc_conf.vvc_enabled) { /* * No need to update the configuration since it is already * done in the above vrrpd_create() call */ err = vrrpd_enable(cmd->vcc_conf.vvc_name, _B_FALSE); if (err != VRRP_SUCCESS) (void) vrrpd_delete(cmd->vcc_conf.vvc_name); } ret->vrc_err = err; } /*ARGSUSED*/ static void vrrpd_cmd_delete(void *arg1, void *arg2, size_t *arg2_sz) { vrrp_cmd_delete_t *cmd = (vrrp_cmd_delete_t *)arg1; vrrp_ret_delete_t *ret = (vrrp_ret_delete_t *)arg2; ret->vrd_err = vrrpd_delete(cmd->vcd_name); } /*ARGSUSED*/ static void vrrpd_cmd_enable(void *arg1, void *arg2, size_t *arg2_sz) { vrrp_cmd_enable_t *cmd = (vrrp_cmd_enable_t *)arg1; vrrp_ret_enable_t *ret = (vrrp_ret_enable_t *)arg2; ret->vrs_err = vrrpd_enable(cmd->vcs_name, _B_TRUE); } /*ARGSUSED*/ static void vrrpd_cmd_disable(void *arg1, void *arg2, size_t *arg2_sz) { vrrp_cmd_disable_t *cmd = (vrrp_cmd_disable_t *)arg1; vrrp_ret_disable_t *ret = (vrrp_ret_disable_t *)arg2; ret->vrx_err = vrrpd_disable(cmd->vcx_name); } /*ARGSUSED*/ static void vrrpd_cmd_modify(void *arg1, void *arg2, size_t *arg2_sz) { vrrp_cmd_modify_t *cmd = (vrrp_cmd_modify_t *)arg1; vrrp_ret_modify_t *ret = (vrrp_ret_modify_t *)arg2; ret->vrm_err = vrrpd_modify(&cmd->vcm_conf, cmd->vcm_mask); } static void vrrpd_cmd_query(void *arg1, void *arg2, size_t *arg2_sz) { vrrp_cmd_query_t *cmd = (vrrp_cmd_query_t *)arg1; vrrpd_query(cmd->vcq_name, arg2, arg2_sz); } static void vrrpd_cmd_list(void *arg1, void *arg2, size_t *arg2_sz) { vrrp_cmd_list_t *cmd = (vrrp_cmd_list_t *)arg1; vrrpd_list(cmd->vcl_vrid, cmd->vcl_ifname, cmd->vcl_af, arg2, arg2_sz); } /* * Write-type requeset must have the solaris.network.vrrp authorization. */ static boolean_t vrrp_auth_check(int connfd, vrrp_cmd_info_t *cinfo) { ucred_t *cred = NULL; uid_t uid; struct passwd *pw; boolean_t success = _B_FALSE; vrrp_log(VRRP_DBG0, "vrrp_auth_check()"); if (!cinfo->vi_setop) return (_B_TRUE); /* * Validate the credential */ if (getpeerucred(connfd, &cred) == (uid_t)-1) { vrrp_log(VRRP_ERR, "vrrp_auth_check(): getpeerucred() " "failed: %s", strerror(errno)); return (_B_FALSE); } if ((uid = ucred_getruid((const ucred_t *)cred)) == (uid_t)-1) { vrrp_log(VRRP_ERR, "vrrp_auth_check(): ucred_getruid() " "failed: %s", strerror(errno)); goto done; } if ((pw = getpwuid(uid)) == NULL) { vrrp_log(VRRP_ERR, "vrrp_auth_check(): getpwuid() failed"); goto done; } success = (chkauthattr("solaris.network.vrrp", pw->pw_name) == 1); done: ucred_free(cred); return (success); } /* * Process the administrative request from libvrrpadm */ /* ARGSUSED */ static void vrrpd_cmdsock_handler(iu_eh_t *eh, int s, short events, iu_event_id_t id, void *arg) { vrrp_cmd_info_t *cinfo = NULL; vrrp_err_t err = VRRP_SUCCESS; uchar_t buf[BUFFSIZE], ackbuf[BUFFSIZE]; size_t cursize, acksize, len; uint32_t cmd; int connfd, i; struct sockaddr_in from; socklen_t fromlen; vrrp_log(VRRP_DBG0, "vrrpd_cmdsock_handler()"); fromlen = (socklen_t)sizeof (from); if ((connfd = accept(s, (struct sockaddr *)&from, &fromlen)) < 0) { vrrp_log(VRRP_ERR, "vrrpd_cmdsock_handler() accept(): %s", strerror(errno)); return; } /* * First get the type of the request */ cursize = 0; while (cursize < sizeof (uint32_t)) { len = read(connfd, buf + cursize, sizeof (uint32_t) - cursize); if (len == (size_t)-1 && (errno == EAGAIN || errno == EINTR)) { continue; } else if (len > 0) { cursize += len; continue; } vrrp_log(VRRP_ERR, "vrrpd_cmdsock_handler(): invalid message " "length"); (void) close(connfd); return; } /* LINTED E_BAD_PTR_CAST_ALIGN */ cmd = ((vrrp_cmd_t *)buf)->vc_cmd; for (i = 0; i < VRRP_DOOR_INFO_TABLE_SIZE; i++) { if (vrrp_cmd_info_tbl[i].vi_cmd == cmd) { cinfo = vrrp_cmd_info_tbl + i; break; } } if (cinfo == NULL) { vrrp_log(VRRP_ERR, "vrrpd_cmdsock_handler(): invalid request " "type %d", cmd); err = VRRP_EINVAL; goto done; } /* * Get the rest of the request. */ assert(cursize == sizeof (uint32_t)); while (cursize < cinfo->vi_reqsize) { len = read(connfd, buf + cursize, cinfo->vi_reqsize - cursize); if (len == (size_t)-1 && (errno == EAGAIN || errno == EINTR)) { continue; } else if (len > 0) { cursize += len; continue; } vrrp_log(VRRP_ERR, "vrrpd_cmdsock_handler(): invalid message " "length"); err = VRRP_EINVAL; goto done; } /* * Validate the authorization */ if (!vrrp_auth_check(connfd, cinfo)) { vrrp_log(VRRP_ERR, "vrrpd_cmdsock_handler(): " "not sufficient authorization"); err = VRRP_EPERM; } done: /* * Ack the request */ if (err != 0) { /* LINTED E_BAD_PTR_CAST_ALIGN */ ((vrrp_ret_t *)ackbuf)->vr_err = err; acksize = sizeof (vrrp_ret_t); } else { /* * If the size of ack is varied, the cmdfunc callback * will set the right size. */ if ((acksize = cinfo->vi_acksize) == 0) acksize = sizeof (ackbuf); /* LINTED E_BAD_PTR_CAST_ALIGN */ cinfo->vi_cmdfunc((vrrp_cmd_t *)buf, ackbuf, &acksize); } /* * Send the ack back. */ cursize = 0; while (cursize < acksize) { len = sendto(connfd, ackbuf + cursize, acksize - cursize, 0, (struct sockaddr *)&from, fromlen); if (len == (size_t)-1 && errno == EAGAIN) { continue; } else if (len > 0) { cursize += len; continue; } else { vrrp_log(VRRP_ERR, "vrrpd_cmdsock_handler() failed to " "ack: %s", strerror(errno)); break; } } (void) shutdown(connfd, SHUT_RDWR); (void) close(connfd); } /* * Process the routing socket messages and update the interfaces/IP addresses * list */ /* ARGSUSED */ static void vrrpd_rtsock_handler(iu_eh_t *eh, int s, short events, iu_event_id_t id, void *arg) { char buf[BUFFSIZE]; struct ifa_msghdr *ifam; int nbytes; int af = *(int *)arg; boolean_t scanif = _B_FALSE; for (;;) { nbytes = read(s, buf, sizeof (buf)); if (nbytes <= 0) { /* No more messages */ break; } /* LINTED E_BAD_PTR_CAST_ALIGN */ ifam = (struct ifa_msghdr *)buf; if (ifam->ifam_version != RTM_VERSION) { vrrp_log(VRRP_ERR, "vrrpd_rtsock_handler(): version %d " "not understood", ifam->ifam_version); break; } vrrp_log(VRRP_DBG0, "vrrpd_rtsock_handler(): recv %s event", rtm_event2str(ifam->ifam_type)); switch (ifam->ifam_type) { case RTM_FREEADDR: case RTM_CHGADDR: case RTM_NEWADDR: case RTM_DELADDR: /* * An IP address has been created/updated/deleted or * brought up/down, re-initilialize the interface/IP * address list. */ scanif = _B_TRUE; break; default: /* Not interesting */ break; } } if (scanif) vrrpd_scan(af); } /* * Periodically scan the interface/IP addresses on the system. */ /* ARGSUSED */ static void vrrpd_scan_timer(iu_tq_t *tq, void *arg) { vrrp_log(VRRP_DBG0, "vrrpd_scan_timer()"); vrrpd_scan(AF_INET); vrrpd_scan(AF_INET6); } /* * Get the list of the interface/IP addresses of the specified address * family. */ static void vrrpd_scan(int af) { vrrp_log(VRRP_DBG0, "vrrpd_scan(%s)", af_str(af)); again: vrrpd_init_ipcache(af); /* * If interface index changes, walk again. */ if (icfg_iterate_if(af, ICFG_PLUMBED, NULL, vrrpd_walk_ipaddr) != ICFG_SUCCESS) goto again; vrrpd_update_ipcache(af); } /* * First mark all IP addresses of the specific address family to be removed. * This flag will then be cleared when we walk up all the IP addresses. */ static void vrrpd_init_ipcache(int af) { vrrp_intf_t *intf, *next_intf; vrrp_ip_t *ip, *nextip; char abuf[INET6_ADDRSTRLEN]; vrrp_log(VRRP_DBG0, "vrrpd_init_ipcache(%s)", af_str(af)); next_intf = TAILQ_FIRST(&vrrp_intf_list); while ((intf = next_intf) != NULL) { next_intf = TAILQ_NEXT(intf, vvi_next); if (intf->vvi_af != af) continue; /* * If the interface is still marked as new, it means that this * vrrpd_init_ipcache() call is a result of ifindex change, * which causes the re-walk of all the interfaces (see * vrrpd_add_ipaddr()), and some interfaces are still marked * as new during the last walk. In this case, delete this * interface with the "update_vr" argument to be _B_FALSE, * since no VRRP router has been assoicated with this * interface yet (the association is done in * vrrpd_update_ipcache()). * * This interface will be re-added later if it still exists. */ if (intf->vvi_state == NODE_STATE_NEW) { vrrp_log(VRRP_DBG0, "vrrpd_init_ipcache(): remove %s " "(%d), may be added later", intf->vvi_ifname, intf->vvi_ifindex); vrrpd_delete_if(intf, _B_FALSE); continue; } for (ip = TAILQ_FIRST(&intf->vvi_iplist); ip != NULL; ip = nextip) { nextip = TAILQ_NEXT(ip, vip_next); /* LINTED E_CONSTANT_CONDITION */ VRRPADDR2STR(af, &ip->vip_addr, abuf, INET6_ADDRSTRLEN, _B_FALSE); if (ip->vip_state != NODE_STATE_NEW) { vrrp_log(VRRP_DBG0, "vrrpd_init_ipcache(%s/%d, " "%s(%s/0x%x))", intf->vvi_ifname, intf->vvi_ifindex, ip->vip_lifname, abuf, ip->vip_flags); ip->vip_state = NODE_STATE_STALE; continue; } /* * If the IP is still marked as new, it means that * this vrrpd_init_ipcache() call is a result of * ifindex change, which causes the re-walk of all * the IP addresses (see vrrpd_add_ipaddr()). * Delete this IP. * * This IP will be readded later if it still exists. */ vrrp_log(VRRP_DBG0, "vrrpd_init_ipcache(): remove " "%s/%d , %s(%s)", intf->vvi_ifname, intf->vvi_ifindex, ip->vip_lifname, abuf); vrrpd_delete_ip(intf, ip); } } } /* * Walk all the IP addresses on the given interface and update its * addresses list. Return ICFG_FAILURE if it is required to walk * all the interfaces again (one of the interface index changes in between). */ /* ARGSUSED */ static int vrrpd_walk_ipaddr(icfg_if_t *intf, void *arg) { icfg_handle_t ih; int ifindex; vrrp_addr_t addr; socklen_t addrlen = (socklen_t)sizeof (struct sockaddr_in6); int prefixlen; uint64_t flags; int err = ICFG_SUCCESS; vrrp_log(VRRP_DBG0, "vrrpd_walk_ipaddr(%s, %s)", intf->if_name, af_str(intf->if_protocol)); if (icfg_open(&ih, intf) != ICFG_SUCCESS) { vrrp_log(VRRP_ERR, "vrrpd_walk_ipaddr(%s, %s): icfg_open() " "failed: %s", intf->if_name, af_str(intf->if_protocol), strerror(errno)); return (err); } if (icfg_get_flags(ih, &flags) != ICFG_SUCCESS) { if (errno != ENXIO && errno != ENOENT) { vrrp_log(VRRP_ERR, "vrrpd_walk_ipaddr(%s, %s): " "icfg_get_flags() failed %s", intf->if_name, af_str(intf->if_protocol), strerror(errno)); } goto done; } /* * skip virtual/IPMP/P2P interfaces. */ if ((flags & (IFF_VIRTUAL|IFF_IPMP|IFF_POINTOPOINT)) != 0) { vrrp_log(VRRP_DBG0, "vrrpd_walk_ipaddr(%s, %s) skipped", intf->if_name, af_str(intf->if_protocol)); goto done; } if (icfg_get_index(ih, &ifindex) != ICFG_SUCCESS) { if (errno != ENXIO && errno != ENOENT) { vrrp_log(VRRP_ERR, "vrrpd_walk_ipaddr(%s, %s) " "icfg_get_index() failed: %s", intf->if_name, af_str(intf->if_protocol), strerror(errno)); } goto done; } if (icfg_get_addr(ih, (struct sockaddr *)&addr, &addrlen, &prefixlen, _B_FALSE) != ICFG_SUCCESS) { if (errno != ENXIO && errno != ENOENT) { vrrp_log(VRRP_ERR, "vrrpd_walk_ipaddr(%s, %s) " "icfg_get_addr() failed: %s", intf->if_name, af_str(intf->if_protocol), strerror(errno)); } goto done; } /* * Filter out the all-zero IP address. */ if (VRRPADDR_UNSPECIFIED(intf->if_protocol, &addr)) goto done; /* * The interface is unplumbed/replumbed during we walk the IP * addresses. Try walk the IP addresses one more time. */ if (vrrpd_add_ipaddr(intf->if_name, intf->if_protocol, &addr, ifindex, flags) == VRRP_EAGAIN) err = ICFG_FAILURE; done: icfg_close(ih); return (err); } /* * Given the information of each IP address, update the interface and * IP addresses list */ static vrrp_err_t vrrpd_add_ipaddr(char *lifname, int af, vrrp_addr_t *addr, int ifindex, uint64_t flags) { char ifname[LIFNAMSIZ], *c; vrrp_intf_t *intf; vrrp_ip_t *ip; char abuf[INET6_ADDRSTRLEN]; vrrp_err_t err; /* LINTED E_CONSTANT_CONDITION */ VRRPADDR2STR(af, addr, abuf, INET6_ADDRSTRLEN, _B_FALSE); vrrp_log(VRRP_DBG0, "vrrpd_add_ipaddr(%s, %s, %d, 0x%x)", lifname, abuf, ifindex, flags); /* * Get the physical interface name from the logical interface name. */ (void) strlcpy(ifname, lifname, sizeof (ifname)); if ((c = strchr(ifname, ':')) != NULL) *c = '\0'; if ((intf = vrrpd_lookup_if(ifname, af)) == NULL) { vrrp_log(VRRP_DBG0, "vrrpd_add_ipaddr(): %s is new", ifname); err = vrrpd_create_if(ifname, af, ifindex, &intf); if (err != VRRP_SUCCESS) return (err); } else if (intf->vvi_ifindex != ifindex) { /* * If index changes, it means that this interface is * unplumbed/replumbed since we last checked. If this * interface is not used by any VRRP router, just * update its ifindex, and the IP addresses list will * be updated later. Otherwise, return EAGAIN to rewalk * all the IP addresses from the beginning. */ vrrp_log(VRRP_DBG0, "vrrpd_add_ipaddr(%s) ifindex changed ", "from %d to %d", ifname, intf->vvi_ifindex, ifindex); if (!IS_PRIMARY_INTF(intf) && !IS_VIRTUAL_INTF(intf)) { intf->vvi_ifindex = ifindex; } else { /* * delete this interface from the list if this * interface has already been assoicated with * any VRRP routers. */ vrrpd_delete_if(intf, _B_TRUE); return (VRRP_EAGAIN); } } /* * Does this IP address already exist? */ TAILQ_FOREACH(ip, &intf->vvi_iplist, vip_next) { if (strcmp(ip->vip_lifname, lifname) == 0) break; } if (ip != NULL) { vrrp_log(VRRP_DBG0, "vrrpd_add_ipaddr(%s, %s) IP exists", lifname, abuf); ip->vip_state = NODE_STATE_NONE; ip->vip_flags = flags; if (ipaddr_cmp(af, addr, &ip->vip_addr) != 0) { /* * Address has been changed, mark it as new * If this address is already selected as the * primary IP address, the new IP will be checked * to see whether it is still qualified as the * primary IP address. If not, the primary IP * address will be reselected. */ (void) memcpy(&ip->vip_addr, addr, sizeof (vrrp_addr_t)); ip->vip_state = NODE_STATE_NEW; } } else { vrrp_log(VRRP_DBG0, "vrrpd_add_ipaddr(%s, %s) IP is new", lifname, abuf); err = vrrpd_create_ip(intf, lifname, addr, flags); if (err != VRRP_SUCCESS) return (err); } return (VRRP_SUCCESS); } /* * Update the interface and IP addresses list. Remove the ones that have been * staled since last time we walk the IP addresses and updated the ones that * have been changed. */ static void vrrpd_update_ipcache(int af) { vrrp_intf_t *intf, *nextif; vrrp_ip_t *ip, *nextip; char abuf[INET6_ADDRSTRLEN]; boolean_t primary_selected; boolean_t primary_now_selected; boolean_t need_reenable = _B_FALSE; vrrp_log(VRRP_DBG0, "vrrpd_update_ipcache(%s)", af_str(af)); nextif = TAILQ_FIRST(&vrrp_intf_list); while ((intf = nextif) != NULL) { nextif = TAILQ_NEXT(intf, vvi_next); if (intf->vvi_af != af) continue; /* * Does the interface already select its primary IP address? */ primary_selected = (intf->vvi_pip != NULL); assert(!primary_selected || IS_PRIMARY_INTF(intf)); /* * Removed the IP addresses that have been unconfigured. */ for (ip = TAILQ_FIRST(&intf->vvi_iplist); ip != NULL; ip = nextip) { nextip = TAILQ_NEXT(ip, vip_next); if (ip->vip_state != NODE_STATE_STALE) continue; /* LINTED E_CONSTANT_CONDITION */ VRRPADDR2STR(af, &ip->vip_addr, abuf, INET6_ADDRSTRLEN, _B_FALSE); vrrp_log(VRRP_DBG0, "vrrpd_update_ipcache(): IP %s " "is removed over %s", abuf, intf->vvi_ifname); vrrpd_delete_ip(intf, ip); } /* * No IP addresses left, delete this interface. */ if (TAILQ_EMPTY(&intf->vvi_iplist)) { vrrp_log(VRRP_DBG0, "vrrpd_update_ipcache(): " "no IP left over %s", intf->vvi_ifname); vrrpd_delete_if(intf, _B_TRUE); continue; } /* * If this is selected ss the physical interface for any * VRRP router, reselect the primary address if needed. */ if (IS_PRIMARY_INTF(intf)) { vrrpd_reselect_primary(intf); primary_now_selected = (intf->vvi_pip != NULL); /* * Cannot find the new primary IP address. */ if (primary_selected && !primary_now_selected) { vrrp_log(VRRP_DBG0, "vrrpd_update_ipcache() " "reselect primary IP on %s failed", intf->vvi_ifname); vrrpd_remove_if(intf, _B_TRUE); } else if (!primary_selected && primary_now_selected) { /* * The primary IP address is successfully * selected on the physical interfacew we * need to walk through all the VRRP routers * that is created on this physical interface * and see whether they can now be enabled. */ need_reenable = _B_TRUE; } } /* * For every new virtual IP address, bring up/down it based * on the state of VRRP router. * * Note that it is fine to not update the IP's vip_flags field * even if vrrpd_virtualip_updateone() changed the address's * up/down state, since the vip_flags field is only used for * select primary IP address over a physical interface, and * vrrpd_virtualip_updateone() only affects the virtual IP * address's status. */ for (ip = TAILQ_FIRST(&intf->vvi_iplist); ip != NULL; ip = nextip) { nextip = TAILQ_NEXT(ip, vip_next); /* LINTED E_CONSTANT_CONDITION */ VRRPADDR2STR(af, &ip->vip_addr, abuf, INET6_ADDRSTRLEN, _B_FALSE); vrrp_log(VRRP_DBG0, "vrrpd_update_ipcache(): " "IP %s over %s%s", abuf, intf->vvi_ifname, ip->vip_state == NODE_STATE_NEW ? " is new" : ""); if (IS_VIRTUAL_INTF(intf)) { /* * If this IP is new, update its up/down state * based on the virtual interface's state * (which is determined by the VRRP router's * state). Otherwise, check only and prompt * warnings if its up/down state has been * changed. */ if (vrrpd_virtualip_updateone(intf, ip, ip->vip_state == NODE_STATE_NONE) != VRRP_SUCCESS) { vrrp_log(VRRP_DBG0, "vrrpd_update_ipcache(): " "IP %s over %s update failed", abuf, intf->vvi_ifname); vrrpd_delete_ip(intf, ip); continue; } } ip->vip_state = NODE_STATE_NONE; } /* * The IP address is deleted when it is failed to be brought * up. If no IP addresses are left, delete this interface. */ if (TAILQ_EMPTY(&intf->vvi_iplist)) { vrrp_log(VRRP_DBG0, "vrrpd_update_ipcache(): " "no IP left over %s", intf->vvi_ifname); vrrpd_delete_if(intf, _B_TRUE); continue; } if (intf->vvi_state == NODE_STATE_NEW) { /* * A new interface is found. This interface can be * the primary interface or the virtual VNIC * interface. Again, we need to walk throught all * the VRRP routers to see whether some of them can * now be enabled because of the new primary IP * address or the new virtual IP addresses. */ intf->vvi_state = NODE_STATE_NONE; need_reenable = _B_TRUE; } } if (need_reenable) vrrpd_reenable_all_vr(); } /* * Reselect primary IP if: * - The existing primary IP is no longer qualified (removed or it is down or * not a link-local IP for IPv6 VRRP router); * - This is a physical interface but no primary IP is chosen; */ static void vrrpd_reselect_primary(vrrp_intf_t *intf) { vrrp_ip_t *ip; char abuf[INET6_ADDRSTRLEN]; assert(IS_PRIMARY_INTF(intf)); /* * If the interface's old primary IP address is still valid, return */ if (((ip = intf->vvi_pip) != NULL) && (QUALIFY_PRIMARY_ADDR(intf, ip))) return; if (ip != NULL) { /* LINTED E_CONSTANT_CONDITION */ VRRPADDR2STR(intf->vvi_af, &ip->vip_addr, abuf, sizeof (abuf), _B_FALSE); vrrp_log(VRRP_DBG0, "vrrpd_reselect_primary(%s): primary IP %s " "is no longer qualified", intf->vvi_ifname, abuf); } ip = vrrpd_select_primary(intf); intf->vvi_pip = ip; if (ip != NULL) { /* LINTED E_CONSTANT_CONDITION */ VRRPADDR2STR(intf->vvi_af, &ip->vip_addr, abuf, sizeof (abuf), _B_FALSE); vrrp_log(VRRP_DBG0, "vrrpd_reselect_primary(%s): primary IP %s " "is selected", intf->vvi_ifname, abuf); } } /* * Select the primary IP address. Since the link-local IP address is always * at the head of the IP address list, try to find the first UP IP address * and see whether it qualify. */ static vrrp_ip_t * vrrpd_select_primary(vrrp_intf_t *pif) { vrrp_ip_t *pip; char abuf[INET6_ADDRSTRLEN]; vrrp_log(VRRP_DBG1, "vrrpd_select_primary(%s)", pif->vvi_ifname); TAILQ_FOREACH(pip, &pif->vvi_iplist, vip_next) { assert(pip->vip_state != NODE_STATE_STALE); /* LINTED E_CONSTANT_CONDITION */ VRRPADDR2STR(pif->vvi_af, &pip->vip_addr, abuf, INET6_ADDRSTRLEN, _B_FALSE); vrrp_log(VRRP_DBG0, "vrrpd_select_primary(%s): %s is %s", pif->vvi_ifname, abuf, (pip->vip_flags & IFF_UP) ? "up" : "down"); if (pip->vip_flags & IFF_UP) break; } /* * Is this valid primary IP address? */ if (pip == NULL || !QUALIFY_PRIMARY_ADDR(pif, pip)) { vrrp_log(VRRP_DBG0, "vrrpd_select_primary(%s/%s) failed", pif->vvi_ifname, af_str(pif->vvi_af)); return (NULL); } return (pip); } /* * This is a new interface. Check whether any VRRP router is waiting for it */ static void vrrpd_reenable_all_vr() { vrrp_vr_t *vr; vrrp_log(VRRP_DBG0, "vrrpd_reenable_all_vr()"); TAILQ_FOREACH(vr, &vrrp_vr_list, vvr_next) { if (vr->vvr_conf.vvc_enabled) (void) vrrpd_enable_vr(vr); } } /* * If primary_addr_gone is _B_TRUE, it means that we failed to select * the primary IP address on this (physical) interface; otherwise, * it means the interface is no longer available. */ static void vrrpd_remove_if(vrrp_intf_t *intf, boolean_t primary_addr_gone) { vrrp_vr_t *vr; vrrp_log(VRRP_DBG0, "vrrpd_remove_if(%s): %s", intf->vvi_ifname, primary_addr_gone ? "primary address gone" : "interface deleted"); TAILQ_FOREACH(vr, &vrrp_vr_list, vvr_next) { if (vr->vvr_conf.vvc_enabled) vrrpd_disable_vr(vr, intf, primary_addr_gone); } } /* * Update the VRRP configuration file based on the given configuration. * op is either VRRP_CONF_UPDATE or VRRP_CONF_DELETE */ static vrrp_err_t vrrpd_updateconf(vrrp_vr_conf_t *newconf, uint_t op) { vrrp_vr_conf_t conf; FILE *fp, *nfp; int nfd; char line[LINE_MAX]; char newfile[MAXPATHLEN]; boolean_t found = _B_FALSE; vrrp_err_t err = VRRP_SUCCESS; vrrp_log(VRRP_DBG0, "vrrpd_updateconf(%s, %s)", newconf->vvc_name, op == VRRP_CONF_UPDATE ? "update" : "delete"); if ((fp = fopen(vrrpd_conffile, "r+F")) == NULL) { vrrp_log(VRRP_ERR, "vrrpd_updateconf(): open %s failed: %s", vrrpd_conffile, strerror(errno)); return (VRRP_EDB); } (void) snprintf(newfile, MAXPATHLEN, "%s.new", vrrpd_conffile); if ((nfd = open(newfile, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) < 0) { vrrp_log(VRRP_ERR, "vrrpd_updateconf(): open %s failed: %s", newfile, strerror(errno)); (void) fclose(fp); return (VRRP_EDB); } if ((nfp = fdopen(nfd, "wF")) == NULL) { vrrp_log(VRRP_ERR, "vrrpd_updateconf(): fdopen(%s) failed: %s", newfile, strerror(errno)); goto done; } while (fgets(line, sizeof (line), fp) != NULL) { conf.vvc_vrid = VRRP_VRID_NONE; if (!found && (err = vrrpd_read_vrconf(line, &conf)) != VRRP_SUCCESS) { vrrp_log(VRRP_ERR, "vrrpd_updateconf(): invalid " "configuration format: %s", line); goto done; } /* * Write this line out if: * - this is a comment line; or * - we've done updating/deleting the the given VR; or * - if the name of the VR read from this line does not match * the VR name that we are about to update/delete; */ if (found || conf.vvc_vrid == VRRP_VRID_NONE || strcmp(conf.vvc_name, newconf->vvc_name) != 0) { if (fputs(line, nfp) != EOF) continue; vrrp_log(VRRP_ERR, "vrrpd_updateconf(): failed to " "write line %s", line); err = VRRP_EDB; goto done; } /* * Otherwise, update/skip the line. */ found = _B_TRUE; if (op == VRRP_CONF_DELETE) continue; assert(op == VRRP_CONF_UPDATE); if ((err = vrrpd_write_vrconf(line, sizeof (line), newconf)) != VRRP_SUCCESS) { vrrp_log(VRRP_ERR, "vrrpd_updateconf(): failed to " "update configuration for %s", newconf->vvc_name); goto done; } if (fputs(line, nfp) == EOF) { vrrp_log(VRRP_ERR, "vrrpd_updateconf(): failed to " "write line %s", line); err = VRRP_EDB; goto done; } } /* * If we get to the end of the file and have not seen the router that * we are about to update, write it out. */ if (!found && op == VRRP_CONF_UPDATE) { if ((err = vrrpd_write_vrconf(line, sizeof (line), newconf)) == VRRP_SUCCESS && fputs(line, nfp) == EOF) { vrrp_log(VRRP_ERR, "vrrpd_updateconf(): failed to " "write line %s", line); err = VRRP_EDB; } } else if (!found && op == VRRP_CONF_DELETE) { vrrp_log(VRRP_ERR, "vrrpd_updateconf(): failed to find " "configuation for %s", newconf->vvc_name); err = VRRP_ENOTFOUND; } if (err != VRRP_SUCCESS) goto done; if (fflush(nfp) == EOF || rename(newfile, vrrpd_conffile) < 0) { vrrp_log(VRRP_ERR, "vrrpd_updateconf(): failed to " "rename file %s", newfile); err = VRRP_EDB; } done: (void) fclose(fp); (void) fclose(nfp); (void) unlink(newfile); return (err); } static vrrp_err_t vrrpd_write_vrconf(char *line, size_t len, vrrp_vr_conf_t *conf) { vrrp_prop_t *prop; int n, i; vrrp_log(VRRP_DBG0, "vrrpd_write_vrconf(%s)", conf->vvc_name); for (i = 0; i < VRRP_PROP_INFO_TABSIZE; i++) { prop = &vrrp_prop_info_tbl[i]; n = snprintf(line, len, i == 0 ? "%s=" : " %s=", prop->vs_propname); if (n < 0 || n >= len) break; len -= n; line += n; n = prop->vs_propwrite(conf, line, len); if (n < 0 || n >= len) break; len -= n; line += n; } if (i != VRRP_PROP_INFO_TABSIZE) { vrrp_log(VRRP_ERR, "vrrpd_write_vrconf(%s): buffer size too" "small", conf->vvc_name); return (VRRP_EDB); } n = snprintf(line, len, "\n"); if (n < 0 || n >= len) { vrrp_log(VRRP_ERR, "vrrpd_write_vrconf(%s): buffer size too" "small", conf->vvc_name); return (VRRP_EDB); } return (VRRP_SUCCESS); } static vrrp_err_t vrrpd_read_vrconf(char *line, vrrp_vr_conf_t *conf) { char *str, *token; char *next; vrrp_err_t err = VRRP_SUCCESS; char tmpbuf[MAXLINELEN]; str = tmpbuf; (void) strlcpy(tmpbuf, line, MAXLINELEN); /* * Skip leading spaces, blank lines, and comments. */ skip_whitespace(str); if ((str - tmpbuf == strlen(tmpbuf)) || (*str == '#')) { conf->vvc_vrid = VRRP_VRID_NONE; return (VRRP_SUCCESS); } /* * Read each VR properties. */ for (token = strtok_r(str, " \n\t", &next); token != NULL; token = strtok_r(NULL, " \n\t", &next)) { if ((err = vrrpd_readprop(token, conf)) != VRRP_SUCCESS) break; } /* All properties read but no VRID defined */ if (err == VRRP_SUCCESS && conf->vvc_vrid == VRRP_VRID_NONE) err = VRRP_EINVAL; return (err); } static vrrp_err_t vrrpd_readprop(const char *str, vrrp_vr_conf_t *conf) { vrrp_prop_t *prop; char *pstr; int i; if ((pstr = strchr(str, '=')) == NULL) { vrrp_log(VRRP_ERR, "vrrpd_readprop(%s): invalid property", str); return (VRRP_EINVAL); } *pstr++ = '\0'; for (i = 0; i < VRRP_PROP_INFO_TABSIZE; i++) { prop = &vrrp_prop_info_tbl[i]; if (strcasecmp(str, prop->vs_propname) == 0) { if (prop->vs_propread(conf, pstr)) break; } } if (i == VRRP_PROP_INFO_TABSIZE) { vrrp_log(VRRP_ERR, "vrrpd_readprop(%s): invalid property", str); return (VRRP_EINVAL); } return (VRRP_SUCCESS); } static boolean_t vrrp_rd_prop_name(vrrp_vr_conf_t *conf, const char *str) { size_t size = sizeof (conf->vvc_name); return (strlcpy(conf->vvc_name, str, size) < size); } static boolean_t vrrp_rd_prop_vrid(vrrp_vr_conf_t *conf, const char *str) { conf->vvc_vrid = strtol(str, NULL, 0); return (!(conf->vvc_vrid < VRRP_VRID_MIN || conf->vvc_vrid > VRRP_VRID_MAX || (conf->vvc_vrid == 0 && errno != 0))); } static boolean_t vrrp_rd_prop_af(vrrp_vr_conf_t *conf, const char *str) { if (strcasecmp(str, "AF_INET") == 0) conf->vvc_af = AF_INET; else if (strcasecmp(str, "AF_INET6") == 0) conf->vvc_af = AF_INET6; else return (_B_FALSE); return (_B_TRUE); } static boolean_t vrrp_rd_prop_pri(vrrp_vr_conf_t *conf, const char *str) { conf->vvc_pri = strtol(str, NULL, 0); return (!(conf->vvc_pri < VRRP_PRI_MIN || conf->vvc_pri > VRRP_PRI_OWNER || (conf->vvc_pri == 0 && errno != 0))); } static boolean_t vrrp_rd_prop_adver_int(vrrp_vr_conf_t *conf, const char *str) { conf->vvc_adver_int = strtol(str, NULL, 0); return (!(conf->vvc_adver_int < VRRP_MAX_ADVER_INT_MIN || conf->vvc_adver_int > VRRP_MAX_ADVER_INT_MAX || (conf->vvc_adver_int == 0 && errno != 0))); } static boolean_t vrrp_rd_prop_preempt(vrrp_vr_conf_t *conf, const char *str) { if (strcasecmp(str, "true") == 0) conf->vvc_preempt = _B_TRUE; else if (strcasecmp(str, "false") == 0) conf->vvc_preempt = _B_FALSE; else return (_B_FALSE); return (_B_TRUE); } static boolean_t vrrp_rd_prop_accept(vrrp_vr_conf_t *conf, const char *str) { if (strcasecmp(str, "true") == 0) conf->vvc_accept = _B_TRUE; else if (strcasecmp(str, "false") == 0) conf->vvc_accept = _B_FALSE; else return (_B_FALSE); return (_B_TRUE); } static boolean_t vrrp_rd_prop_enabled(vrrp_vr_conf_t *conf, const char *str) { if (strcasecmp(str, "enabled") == 0) conf->vvc_enabled = _B_TRUE; else if (strcasecmp(str, "disabled") == 0) conf->vvc_enabled = _B_FALSE; else return (_B_FALSE); return (_B_TRUE); } static boolean_t vrrp_rd_prop_ifname(vrrp_vr_conf_t *conf, const char *str) { size_t size = sizeof (conf->vvc_link); return (strlcpy(conf->vvc_link, str, size) < size); } static int vrrp_wt_prop_name(vrrp_vr_conf_t *conf, char *str, size_t size) { return (snprintf(str, size, "%s", conf->vvc_name)); } static int vrrp_wt_prop_pri(vrrp_vr_conf_t *conf, char *str, size_t size) { return (snprintf(str, size, "%d", conf->vvc_pri)); } static int vrrp_wt_prop_adver_int(vrrp_vr_conf_t *conf, char *str, size_t size) { return (snprintf(str, size, "%d", conf->vvc_adver_int)); } static int vrrp_wt_prop_preempt(vrrp_vr_conf_t *conf, char *str, size_t size) { return (snprintf(str, size, "%s", conf->vvc_preempt ? "true" : "false")); } static int vrrp_wt_prop_accept(vrrp_vr_conf_t *conf, char *str, size_t size) { return (snprintf(str, size, "%s", conf->vvc_accept ? "true" : "false")); } static int vrrp_wt_prop_enabled(vrrp_vr_conf_t *conf, char *str, size_t size) { return (snprintf(str, size, "%s", conf->vvc_enabled ? "enabled" : "disabled")); } static int vrrp_wt_prop_vrid(vrrp_vr_conf_t *conf, char *str, size_t size) { return (snprintf(str, size, "%d", conf->vvc_vrid)); } static int vrrp_wt_prop_af(vrrp_vr_conf_t *conf, char *str, size_t size) { return (snprintf(str, size, "%s", conf->vvc_af == AF_INET ? "AF_INET" : "AF_INET6")); } static int vrrp_wt_prop_ifname(vrrp_vr_conf_t *conf, char *str, size_t size) { return (snprintf(str, size, "%s", conf->vvc_link)); } static char * af_str(int af) { if (af == 4 || af == AF_INET) return ("AF_INET"); else if (af == 6 || af == AF_INET6) return ("AF_INET6"); else if (af == AF_UNSPEC) return ("AF_UNSPEC"); else return ("AF_error"); } static vrrp_err_t vrrpd_create_vr(vrrp_vr_conf_t *conf) { vrrp_vr_t *vr; vrrp_log(VRRP_DBG0, "vrrpd_create_vr(%s)", conf->vvc_name); if ((vr = malloc(sizeof (vrrp_vr_t))) == NULL) { vrrp_log(VRRP_ERR, "vrrpd_create_vr(): memory allocation for %s" " failed", conf->vvc_name); return (VRRP_ENOMEM); } bzero(vr, sizeof (vrrp_vr_t)); vr->vvr_state = VRRP_STATE_NONE; vr->vvr_timer_id = -1; vrrpd_state_trans(VRRP_STATE_NONE, VRRP_STATE_INIT, vr); (void) memcpy(&vr->vvr_conf, conf, sizeof (vrrp_vr_conf_t)); vr->vvr_conf.vvc_enabled = _B_FALSE; TAILQ_INSERT_HEAD(&vrrp_vr_list, vr, vvr_next); return (VRRP_SUCCESS); } static void vrrpd_delete_vr(vrrp_vr_t *vr) { vrrp_log(VRRP_DBG0, "vrrpd_delete_vr(%s)", vr->vvr_conf.vvc_name); if (vr->vvr_conf.vvc_enabled) vrrpd_disable_vr(vr, NULL, _B_FALSE); assert(vr->vvr_state == VRRP_STATE_INIT); vrrpd_state_trans(VRRP_STATE_INIT, VRRP_STATE_NONE, vr); TAILQ_REMOVE(&vrrp_vr_list, vr, vvr_next); (void) free(vr); } static vrrp_err_t vrrpd_enable_vr(vrrp_vr_t *vr) { vrrp_err_t rx_err, tx_err, err = VRRP_EINVAL; vrrp_log(VRRP_DBG0, "vrrpd_enable_vr(%s)", vr->vvr_conf.vvc_name); assert(vr->vvr_conf.vvc_enabled); /* * This VRRP router has been successfully enabled and start * participating. */ if (vr->vvr_state != VRRP_STATE_INIT) return (VRRP_SUCCESS); if ((rx_err = vrrpd_init_rxsock(vr)) == VRRP_SUCCESS) { /* * Select the primary IP address. Even if this time * primary IP selection failed, we will reselect the * primary IP address when new IP address comes up. */ vrrpd_reselect_primary(vr->vvr_pif); if (vr->vvr_pif->vvi_pip == NULL) { vrrp_log(VRRP_DBG0, "vrrpd_enable_vr(%s): " "select_primary over %s failed", vr->vvr_conf.vvc_name, vr->vvr_pif->vvi_ifname); rx_err = VRRP_ENOPRIM; } } /* * Initialize the TX socket used for this vrrp_vr_t to send the * multicast packets. */ tx_err = vrrpd_init_txsock(vr); /* * Only start the state transition if sockets for both RX and TX are * initialized correctly. */ if (rx_err != VRRP_SUCCESS || tx_err != VRRP_SUCCESS) { /* * Record the error information for diagnose purpose. */ vr->vvr_err = (rx_err == VRRP_SUCCESS) ? tx_err : rx_err; return (err); } if (vr->vvr_conf.vvc_pri == 255) err = vrrpd_state_i2m(vr); else err = vrrpd_state_i2b(vr); if (err != VRRP_SUCCESS) { vr->vvr_err = err; vr->vvr_pif->vvi_pip = NULL; vrrpd_fini_txsock(vr); vrrpd_fini_rxsock(vr); } return (err); } /* * Given the removed interface, see whether the given VRRP router would * be affected and stop participating the VRRP protocol. * * If intf is NULL, VR disabling request is coming from the admin. */ static void vrrpd_disable_vr(vrrp_vr_t *vr, vrrp_intf_t *intf, boolean_t primary_addr_gone) { vrrp_log(VRRP_DBG0, "vrrpd_disable_vr(%s): %s%s", vr->vvr_conf.vvc_name, intf == NULL ? "requested by admin" : intf->vvi_ifname, intf == NULL ? "" : (primary_addr_gone ? "primary address gone" : "interface deleted")); /* * An interface is deleted, see whether this interface is the * physical interface or the VNIC of the given VRRP router. * If so, continue to disable the VRRP router. */ if (!primary_addr_gone && (intf != NULL) && (intf != vr->vvr_pif) && (intf != vr->vvr_vif)) { return; } /* * If this is the case that the primary IP address is gone, * and we failed to reselect another primary IP address, * continue to disable the VRRP router. */ if (primary_addr_gone && intf != vr->vvr_pif) return; vrrp_log(VRRP_DBG1, "vrrpd_disable_vr(%s): disabling", vr->vvr_conf.vvc_name); if (vr->vvr_state == VRRP_STATE_MASTER) { /* * If this router is disabled by the administrator, send * the zero-priority advertisement to indicate the Master * stops participating VRRP. */ if (intf == NULL) (void) vrrpd_send_adv(vr, _B_TRUE); vrrpd_state_m2i(vr); } else if (vr->vvr_state == VRRP_STATE_BACKUP) { vrrpd_state_b2i(vr); } /* * If no primary IP address can be selected, the VRRP router * stays at the INIT state and will become BACKUP and MASTER when * a primary IP address is reselected. */ if (primary_addr_gone) { vrrp_log(VRRP_DBG1, "vrrpd_disable_vr(%s): primary IP " "is removed", vr->vvr_conf.vvc_name); vr->vvr_err = VRRP_ENOPRIM; } else if (intf == NULL) { /* * The VRRP router is disable by the administrator */ vrrp_log(VRRP_DBG1, "vrrpd_disable_vr(%s): disabled by admin", vr->vvr_conf.vvc_name); vr->vvr_err = VRRP_SUCCESS; vrrpd_fini_txsock(vr); vrrpd_fini_rxsock(vr); } else if (intf == vr->vvr_pif) { vrrp_log(VRRP_DBG1, "vrrpd_disable_vr(%s): physical interface " "%s removed", vr->vvr_conf.vvc_name, intf->vvi_ifname); vr->vvr_err = VRRP_ENOPRIM; vrrpd_fini_rxsock(vr); } else if (intf == vr->vvr_vif) { vrrp_log(VRRP_DBG1, "vrrpd_disable_vr(%s): VNIC interface %s" " removed", vr->vvr_conf.vvc_name, intf->vvi_ifname); vr->vvr_err = VRRP_ENOVIRT; vrrpd_fini_txsock(vr); } } vrrp_err_t vrrpd_create(vrrp_vr_conf_t *conf, boolean_t updateconf) { vrrp_err_t err = VRRP_SUCCESS; vrrp_log(VRRP_DBG0, "vrrpd_create(%s, %s, %d)", conf->vvc_name, conf->vvc_link, conf->vvc_vrid); assert(conf != NULL); /* * Sanity check */ if ((strlen(conf->vvc_name) == 0) || (strlen(conf->vvc_link) == 0) || (conf->vvc_vrid < VRRP_VRID_MIN || conf->vvc_vrid > VRRP_VRID_MAX) || (conf->vvc_pri < VRRP_PRI_MIN || conf->vvc_pri > VRRP_PRI_OWNER) || (conf->vvc_adver_int < VRRP_MAX_ADVER_INT_MIN || conf->vvc_adver_int > VRRP_MAX_ADVER_INT_MAX) || (conf->vvc_af != AF_INET && conf->vvc_af != AF_INET6) || (conf->vvc_pri == VRRP_PRI_OWNER && !conf->vvc_accept)) { vrrp_log(VRRP_DBG1, "vrrpd_create(%s): invalid argument", conf->vvc_name); return (VRRP_EINVAL); } if (!vrrp_valid_name(conf->vvc_name)) { vrrp_log(VRRP_DBG1, "vrrpd_create(): %s is not a valid router " "name", conf->vvc_name); return (VRRP_EINVALVRNAME); } if (vrrpd_lookup_vr_by_name(conf->vvc_name) != NULL) { vrrp_log(VRRP_DBG1, "vrrpd_create(): %s already exists", conf->vvc_name); return (VRRP_EINSTEXIST); } if (vrrpd_lookup_vr_by_vrid(conf->vvc_link, conf->vvc_vrid, conf->vvc_af) != NULL) { vrrp_log(VRRP_DBG1, "vrrpd_create(): VRID %d/%s over %s " "already exists", conf->vvc_vrid, af_str(conf->vvc_af), conf->vvc_link); return (VRRP_EVREXIST); } if (updateconf && (err = vrrpd_updateconf(conf, VRRP_CONF_UPDATE)) != VRRP_SUCCESS) { vrrp_log(VRRP_ERR, "vrrpd_create(): failed to update " "configuration for %s", conf->vvc_name); return (err); } err = vrrpd_create_vr(conf); if (err != VRRP_SUCCESS && updateconf) (void) vrrpd_updateconf(conf, VRRP_CONF_DELETE); return (err); } static vrrp_err_t vrrpd_delete(const char *vn) { vrrp_vr_t *vr; vrrp_err_t err; vrrp_log(VRRP_DBG0, "vrrpd_delete(%s)", vn); if ((vr = vrrpd_lookup_vr_by_name(vn)) == NULL) { vrrp_log(VRRP_DBG1, "vrrpd_delete(): %s not exists", vn); return (VRRP_ENOTFOUND); } err = vrrpd_updateconf(&vr->vvr_conf, VRRP_CONF_DELETE); if (err != VRRP_SUCCESS) { vrrp_log(VRRP_ERR, "vrrpd_delete(): failed to delete " "configuration for %s", vr->vvr_conf.vvc_name); return (err); } vrrpd_delete_vr(vr); return (VRRP_SUCCESS); } static vrrp_err_t vrrpd_enable(const char *vn, boolean_t updateconf) { vrrp_vr_t *vr; vrrp_vr_conf_t *conf; uint32_t flags; datalink_class_t class; vrrp_err_t err = VRRP_SUCCESS; vrrp_log(VRRP_DBG0, "vrrpd_enable(%s)", vn); if ((vr = vrrpd_lookup_vr_by_name(vn)) == NULL) { vrrp_log(VRRP_DBG1, "vrrpd_enable(): %s does not exist", vn); return (VRRP_ENOTFOUND); } /* * The VR is already enabled. */ conf = &vr->vvr_conf; if (conf->vvc_enabled) { vrrp_log(VRRP_DBG1, "vrrpd_enable(): %s is already " "enabled", vn); return (VRRP_EALREADY); } /* * Check whether the link exists. */ if ((strlen(conf->vvc_link) == 0) || dladm_name2info(vrrpd_vh->vh_dh, conf->vvc_link, NULL, &flags, &class, NULL) != DLADM_STATUS_OK || !(flags & DLADM_OPT_ACTIVE) || ((class != DATALINK_CLASS_PHYS) && (class != DATALINK_CLASS_VLAN) && (class != DATALINK_CLASS_AGGR))) { vrrp_log(VRRP_DBG1, "vrrpd_enable(%s): invalid link %s", vn, conf->vvc_link); return (VRRP_EINVALLINK); } /* * Get the associated VNIC name by the given interface/vrid/ * address famitly. */ err = vrrp_get_vnicname(vrrpd_vh, conf->vvc_vrid, conf->vvc_af, conf->vvc_link, NULL, NULL, vr->vvr_vnic, sizeof (vr->vvr_vnic)); if (err != VRRP_SUCCESS) { vrrp_log(VRRP_DBG1, "vrrpd_enable(%s): no VNIC for VRID %d/%s " "over %s", vn, conf->vvc_vrid, af_str(conf->vvc_af), conf->vvc_link); err = VRRP_ENOVNIC; goto fail; } /* * Find the right VNIC, primary interface and get the list of the * protected IP adressses and primary IP address. Note that if * either interface is NULL (no IP addresses configured over the * interface), we will still continue and mark this VRRP router * as "enabled". */ vr->vvr_conf.vvc_enabled = _B_TRUE; if (updateconf && (err = vrrpd_updateconf(&vr->vvr_conf, VRRP_CONF_UPDATE)) != VRRP_SUCCESS) { vrrp_log(VRRP_ERR, "vrrpd_enable(): failed to update " "configuration for %s", vr->vvr_conf.vvc_name); goto fail; } /* * If vrrpd_setup_vr() fails, it is possible that there is no IP * addresses over ether the primary interface or the VNIC yet, * return success in this case, the VRRP router will stay in * the initialized state and start to work when the IP address is * configured. */ (void) vrrpd_enable_vr(vr); return (VRRP_SUCCESS); fail: vr->vvr_conf.vvc_enabled = _B_FALSE; vr->vvr_vnic[0] = '\0'; return (err); } static vrrp_err_t vrrpd_disable(const char *vn) { vrrp_vr_t *vr; vrrp_err_t err; vrrp_log(VRRP_DBG0, "vrrpd_disable(%s)", vn); if ((vr = vrrpd_lookup_vr_by_name(vn)) == NULL) { vrrp_log(VRRP_DBG1, "vrrpd_disable(): %s does not exist", vn); return (VRRP_ENOTFOUND); } /* * The VR is already disable. */ if (!vr->vvr_conf.vvc_enabled) { vrrp_log(VRRP_DBG1, "vrrpd_disable(): %s was not enabled", vn); return (VRRP_EALREADY); } vr->vvr_conf.vvc_enabled = _B_FALSE; err = vrrpd_updateconf(&vr->vvr_conf, VRRP_CONF_UPDATE); if (err != VRRP_SUCCESS) { vr->vvr_conf.vvc_enabled = _B_TRUE; vrrp_log(VRRP_ERR, "vrrpd_disable(): failed to update " "configuration for %s", vr->vvr_conf.vvc_name); return (err); } vrrpd_disable_vr(vr, NULL, _B_FALSE); vr->vvr_vnic[0] = '\0'; return (VRRP_SUCCESS); } static vrrp_err_t vrrpd_modify(vrrp_vr_conf_t *conf, uint32_t mask) { vrrp_vr_t *vr; vrrp_vr_conf_t savconf; int pri; boolean_t accept, set_accept = _B_FALSE; vrrp_err_t err; vrrp_log(VRRP_DBG0, "vrrpd_modify(%s)", conf->vvc_name); if (mask == 0) return (VRRP_SUCCESS); if ((vr = vrrpd_lookup_vr_by_name(conf->vvc_name)) == NULL) { vrrp_log(VRRP_DBG1, "vrrpd_modify(): cannot find the given " "VR instance: %s", conf->vvc_name); return (VRRP_ENOTFOUND); } if (mask & VRRP_CONF_INTERVAL) { if (conf->vvc_adver_int < VRRP_MAX_ADVER_INT_MIN || conf->vvc_adver_int > VRRP_MAX_ADVER_INT_MAX) { vrrp_log(VRRP_DBG1, "vrrpd_modify(%s): invalid " "adver_interval %d", conf->vvc_name, conf->vvc_adver_int); return (VRRP_EINVAL); } } pri = vr->vvr_conf.vvc_pri; if (mask & VRRP_CONF_PRIORITY) { if (conf->vvc_pri < VRRP_PRI_MIN || conf->vvc_pri > VRRP_PRI_OWNER) { vrrp_log(VRRP_DBG1, "vrrpd_modify(%s): invalid " "priority %d", conf->vvc_name, conf->vvc_pri); return (VRRP_EINVAL); } pri = conf->vvc_pri; } accept = vr->vvr_conf.vvc_accept; if (mask & VRRP_CONF_ACCEPT) accept = conf->vvc_accept; if (pri == VRRP_PRI_OWNER && !accept) { vrrp_log(VRRP_DBG1, "vrrpd_modify(%s): accept mode must be " "true for VRRP address owner", conf->vvc_name); return (VRRP_EINVAL); } if ((mask & VRRP_CONF_ACCEPT) && (vr->vvr_conf.vvc_accept != accept)) { err = vrrpd_set_noaccept(vr, !accept); if (err != VRRP_SUCCESS) { vrrp_log(VRRP_ERR, "vrrpd_modify(%s): access mode " "updating failed: %s", conf->vvc_name, vrrp_err2str(err)); return (err); } set_accept = _B_TRUE; } /* * Save the current configuration, so it can be restored if the * following fails. */ (void) memcpy(&savconf, &vr->vvr_conf, sizeof (vrrp_vr_conf_t)); if (mask & VRRP_CONF_PREEMPT) vr->vvr_conf.vvc_preempt = conf->vvc_preempt; if (mask & VRRP_CONF_ACCEPT) vr->vvr_conf.vvc_accept = accept; if (mask & VRRP_CONF_PRIORITY) vr->vvr_conf.vvc_pri = pri; if (mask & VRRP_CONF_INTERVAL) vr->vvr_conf.vvc_adver_int = conf->vvc_adver_int; err = vrrpd_updateconf(&vr->vvr_conf, VRRP_CONF_UPDATE); if (err != VRRP_SUCCESS) { vrrp_log(VRRP_ERR, "vrrpd_modify(%s): configuration update " "failed: %s", conf->vvc_name, vrrp_err2str(err)); if (set_accept) (void) vrrpd_set_noaccept(vr, accept); (void) memcpy(&vr->vvr_conf, &savconf, sizeof (vrrp_vr_conf_t)); return (err); } if ((mask & VRRP_CONF_PRIORITY) && (vr->vvr_state == VRRP_STATE_BACKUP)) vr->vvr_timeout = MASTER_DOWN_INTERVAL_VR(vr); if ((mask & VRRP_CONF_INTERVAL) && (vr->vvr_state == VRRP_STATE_MASTER)) vr->vvr_timeout = conf->vvc_adver_int; return (VRRP_SUCCESS); } static void vrrpd_list(vrid_t vrid, char *ifname, int af, vrrp_ret_list_t *ret, size_t *sizep) { vrrp_vr_t *vr; char *p = (char *)ret + sizeof (vrrp_ret_list_t); size_t size = (*sizep) - sizeof (vrrp_ret_list_t); vrrp_log(VRRP_DBG0, "vrrpd_list(%d_%s_%s)", vrid, ifname, af_str(af)); ret->vrl_cnt = 0; TAILQ_FOREACH(vr, &vrrp_vr_list, vvr_next) { if (vrid != VRRP_VRID_NONE && vr->vvr_conf.vvc_vrid != vrid) continue; if (strlen(ifname) != 0 && strcmp(ifname, vr->vvr_conf.vvc_link) == 0) { continue; } if ((af == AF_INET || af == AF_INET6) && vr->vvr_conf.vvc_af != af) continue; if (size < VRRP_NAME_MAX) { vrrp_log(VRRP_DBG1, "vrrpd_list(): buffer size too " "small to hold %d router names", ret->vrl_cnt); *sizep = sizeof (vrrp_ret_list_t); ret->vrl_err = VRRP_ETOOSMALL; return; } (void) strlcpy(p, vr->vvr_conf.vvc_name, VRRP_NAME_MAX); p += (strlen(vr->vvr_conf.vvc_name) + 1); ret->vrl_cnt++; size -= VRRP_NAME_MAX; } *sizep = sizeof (vrrp_ret_list_t) + ret->vrl_cnt * VRRP_NAME_MAX; vrrp_log(VRRP_DBG1, "vrrpd_list() return %d", ret->vrl_cnt); ret->vrl_err = VRRP_SUCCESS; } static void vrrpd_query(const char *vn, vrrp_ret_query_t *ret, size_t *sizep) { vrrp_queryinfo_t *infop; vrrp_vr_t *vr; vrrp_intf_t *vif; vrrp_ip_t *ip; struct timeval now; uint32_t vipcnt = 0; size_t size = *sizep; vrrp_log(VRRP_DBG1, "vrrpd_query(%s)", vn); if ((vr = vrrpd_lookup_vr_by_name(vn)) == NULL) { vrrp_log(VRRP_DBG1, "vrrpd_query(): %s does not exist", vn); *sizep = sizeof (vrrp_ret_query_t); ret->vrq_err = VRRP_ENOTFOUND; return; } /* * Get the virtual IP list if the router is not in the INIT state. */ if (vr->vvr_state != VRRP_STATE_INIT) { vif = vr->vvr_vif; TAILQ_FOREACH(ip, &vif->vvi_iplist, vip_next) { vipcnt++; } } *sizep = sizeof (vrrp_ret_query_t); *sizep += (vipcnt == 0) ? 0 : (vipcnt - 1) * sizeof (vrrp_addr_t); if (*sizep > size) { vrrp_log(VRRP_ERR, "vrrpd_query(): not enough space to hold " "%d virtual IPs", vipcnt); *sizep = sizeof (vrrp_ret_query_t); ret->vrq_err = VRRP_ETOOSMALL; return; } (void) gettimeofday(&now, NULL); bzero(ret, *sizep); infop = &ret->vrq_qinfo; (void) memcpy(&infop->show_vi, &(vr->vvr_conf), sizeof (vrrp_vr_conf_t)); (void) memcpy(&infop->show_vs, &(vr->vvr_sinfo), sizeof (vrrp_stateinfo_t)); (void) strlcpy(infop->show_va.va_vnic, vr->vvr_vnic, MAXLINKNAMELEN); infop->show_vt.vt_since_last_tran = timeval_to_milli( timeval_delta(now, vr->vvr_sinfo.vs_st_time)); if (vr->vvr_state == VRRP_STATE_INIT) { ret->vrq_err = VRRP_SUCCESS; return; } vipcnt = 0; TAILQ_FOREACH(ip, &vif->vvi_iplist, vip_next) { (void) memcpy(&infop->show_va.va_vips[vipcnt++], &ip->vip_addr, sizeof (vrrp_addr_t)); } infop->show_va.va_vipcnt = vipcnt; (void) memcpy(&infop->show_va.va_primary, &vr->vvr_pif->vvi_pip->vip_addr, sizeof (vrrp_addr_t)); (void) memcpy(&infop->show_vp, &(vr->vvr_peer), sizeof (vrrp_peer_t)); /* * Check whether there is a peer. */ if (!VRRPADDR_UNSPECIFIED(vr->vvr_conf.vvc_af, &(vr->vvr_peer.vp_addr))) { infop->show_vt.vt_since_last_adv = timeval_to_milli( timeval_delta(now, vr->vvr_peer.vp_time)); } if (vr->vvr_state == VRRP_STATE_BACKUP) { infop->show_vt.vt_master_down_intv = MASTER_DOWN_INTERVAL_VR(vr); } ret->vrq_err = VRRP_SUCCESS; } /* * Build the VRRP packet (not including the IP header). Return the * payload length. * * If zero_pri is set to be B_TRUE, then this is the specical zero-priority * advertisement which is sent by the Master to indicate that it has been * stopped participating in VRRP. */ static size_t vrrpd_build_vrrp(vrrp_vr_t *vr, uchar_t *buf, int buflen, boolean_t zero_pri) { /* LINTED E_BAD_PTR_CAST_ALIGN */ vrrp_pkt_t *vp = (vrrp_pkt_t *)buf; /* LINTED E_BAD_PTR_CAST_ALIGN */ struct in_addr *a4 = (struct in_addr *)(vp + 1); /* LINTED E_BAD_PTR_CAST_ALIGN */ struct in6_addr *a6 = (struct in6_addr *)(vp + 1); vrrp_intf_t *vif = vr->vvr_vif; vrrp_ip_t *vip; int af = vif->vvi_af; size_t size = sizeof (vrrp_pkt_t); uint16_t rsvd_adver_int; int nip = 0; vrrp_log(VRRP_DBG1, "vrrpd_build_vrrp(%s, %s_priority): intv %d", vr->vvr_conf.vvc_name, zero_pri ? "zero" : "non-zero", vr->vvr_conf.vvc_adver_int); TAILQ_FOREACH(vip, &vif->vvi_iplist, vip_next) { if ((size += ((af == AF_INET) ? sizeof (struct in_addr) : sizeof (struct in6_addr))) > buflen) { vrrp_log(VRRP_ERR, "vrrpd_build_vrrp(%s): buffer size " "not big enough %d", vr->vvr_conf.vvc_name, size); return (0); } if (af == AF_INET) a4[nip++] = vip->vip_addr.in4.sin_addr; else a6[nip++] = vip->vip_addr.in6.sin6_addr; } if (nip == 0) { vrrp_log(VRRP_ERR, "vrrpd_build_vrrp(%s): no virtual IP " "address", vr->vvr_conf.vvc_name); return (0); } vp->vp_vers_type = (VRRP_VERSION << 4) | VRRP_PKT_ADVERT; vp->vp_vrid = vr->vvr_conf.vvc_vrid; vp->vp_prio = zero_pri ? VRRP_PRIO_ZERO : vr->vvr_conf.vvc_pri; rsvd_adver_int = MSEC2CENTISEC(vr->vvr_conf.vvc_adver_int) & 0x0fff; vp->vp_rsvd_adver_int = htons(rsvd_adver_int); vp->vp_ipnum = nip; /* * Set the checksum to 0 first, then caculate it. */ vp->vp_chksum = 0; if (af == AF_INET) { vp->vp_chksum = vrrp_cksum4( &vr->vvr_pif->vvi_pip->vip_addr.in4.sin_addr, &vrrp_muladdr4.in4.sin_addr, size, vp); } else { vp->vp_chksum = vrrp_cksum6( &vr->vvr_pif->vvi_pip->vip_addr.in6.sin6_addr, &vrrp_muladdr6.in6.sin6_addr, size, vp); } return (size); } /* * We need to build the IPv4 header on our own. */ static vrrp_err_t vrrpd_send_adv_v4(vrrp_vr_t *vr, uchar_t *buf, size_t len, boolean_t zero_pri) { /* LINTED E_BAD_PTR_CAST_ALIGN */ struct ip *ip = (struct ip *)buf; size_t plen; vrrp_log(VRRP_DBG1, "vrrpd_send_adv_v4(%s)", vr->vvr_conf.vvc_name); if ((plen = vrrpd_build_vrrp(vr, buf + sizeof (struct ip), len - sizeof (struct ip), zero_pri)) == 0) { return (VRRP_ETOOSMALL); } ip->ip_hl = sizeof (struct ip) >> 2; ip->ip_v = IPV4_VERSION; ip->ip_tos = 0; plen += sizeof (struct ip); ip->ip_len = htons(plen); ip->ip_off = 0; ip->ip_ttl = VRRP_IP_TTL; ip->ip_p = IPPROTO_VRRP; ip->ip_src = vr->vvr_pif->vvi_pip->vip_addr.in4.sin_addr; ip->ip_dst = vrrp_muladdr4.in4.sin_addr; /* * The kernel will set the IP cksum and the IPv4 identification. */ ip->ip_id = 0; ip->ip_sum = 0; if ((len = sendto(vr->vvr_vif->vvi_sockfd, buf, plen, 0, (const struct sockaddr *)&vrrp_muladdr4, sizeof (struct sockaddr_in))) != plen) { vrrp_log(VRRP_ERR, "vrrpd_send_adv_v4(): sendto() on " "(vrid:%d, %s, %s) failed: %s sent:%d expect:%d", vr->vvr_conf.vvc_vrid, vr->vvr_vif->vvi_ifname, af_str(vr->vvr_conf.vvc_af), strerror(errno), len, plen); return (VRRP_ESYS); } vrrp_log(VRRP_DBG1, "vrrpd_send_adv_v4(%s) succeed", vr->vvr_conf.vvc_name); return (VRRP_SUCCESS); } static vrrp_err_t vrrpd_send_adv_v6(vrrp_vr_t *vr, uchar_t *buf, size_t len, boolean_t zero_pri) { struct msghdr msg6; size_t hoplimit_space = 0; size_t pktinfo_space = 0; size_t bufspace = 0; struct in6_pktinfo *pktinfop; struct cmsghdr *cmsgp; uchar_t *cmsg_datap; struct iovec iov; size_t plen; vrrp_log(VRRP_DBG1, "vrrpd_send_adv_v6(%s)", vr->vvr_conf.vvc_name); if ((plen = vrrpd_build_vrrp(vr, buf, len, zero_pri)) == 0) return (VRRP_ETOOSMALL); msg6.msg_control = NULL; msg6.msg_controllen = 0; hoplimit_space = sizeof (int); bufspace += sizeof (struct cmsghdr) + _MAX_ALIGNMENT + hoplimit_space + _MAX_ALIGNMENT; pktinfo_space = sizeof (struct in6_pktinfo); bufspace += sizeof (struct cmsghdr) + _MAX_ALIGNMENT + pktinfo_space + _MAX_ALIGNMENT; /* * We need to temporarily set the msg6.msg_controllen to bufspace * (we will later trim it to actual length used). This is needed because * CMSG_NXTHDR() uses it to check we have not exceeded the bounds. */ bufspace += sizeof (struct cmsghdr); msg6.msg_controllen = bufspace; msg6.msg_control = (struct cmsghdr *)malloc(bufspace); if (msg6.msg_control == NULL) { vrrp_log(VRRP_ERR, "vrrpd_send_adv_v6(%s): memory allocation " "failed: %s", vr->vvr_conf.vvc_name, strerror(errno)); return (VRRP_ENOMEM); } cmsgp = CMSG_FIRSTHDR(&msg6); cmsgp->cmsg_level = IPPROTO_IPV6; cmsgp->cmsg_type = IPV6_HOPLIMIT; cmsg_datap = CMSG_DATA(cmsgp); /* LINTED */ *(int *)cmsg_datap = VRRP_IP_TTL; cmsgp->cmsg_len = cmsg_datap + hoplimit_space - (uchar_t *)cmsgp; cmsgp = CMSG_NXTHDR(&msg6, cmsgp); cmsgp->cmsg_level = IPPROTO_IPV6; cmsgp->cmsg_type = IPV6_PKTINFO; cmsg_datap = CMSG_DATA(cmsgp); /* LINTED */ pktinfop = (struct in6_pktinfo *)cmsg_datap; /* * We don't know if pktinfop->ipi6_addr is aligned properly, * therefore let's use bcopy, instead of assignment. */ (void) bcopy(&vr->vvr_pif->vvi_pip->vip_addr.in6.sin6_addr, &pktinfop->ipi6_addr, sizeof (struct in6_addr)); /* * We can assume pktinfop->ipi6_ifindex is 32 bit aligned. */ pktinfop->ipi6_ifindex = vr->vvr_vif->vvi_ifindex; cmsgp->cmsg_len = cmsg_datap + pktinfo_space - (uchar_t *)cmsgp; cmsgp = CMSG_NXTHDR(&msg6, cmsgp); msg6.msg_controllen = (char *)cmsgp - (char *)msg6.msg_control; msg6.msg_name = &vrrp_muladdr6; msg6.msg_namelen = sizeof (struct sockaddr_in6); iov.iov_base = buf; iov.iov_len = plen; msg6.msg_iov = &iov; msg6.msg_iovlen = 1; if ((len = sendmsg(vr->vvr_vif->vvi_sockfd, (const struct msghdr *)&msg6, 0)) != plen) { vrrp_log(VRRP_ERR, "vrrpd_send_adv_v6(%s): sendmsg() failed: " "%s expect %d sent %d", vr->vvr_conf.vvc_name, strerror(errno), plen, len); (void) free(msg6.msg_control); return (VRRP_ESYS); } vrrp_log(VRRP_DBG1, "vrrpd_send_adv_v6(%s) succeed", vr->vvr_conf.vvc_name); (void) free(msg6.msg_control); return (VRRP_SUCCESS); } /* * Send the VRRP advertisement packets. */ static vrrp_err_t vrrpd_send_adv(vrrp_vr_t *vr, boolean_t zero_pri) { uint64_t buf[(IP_MAXPACKET + 1)/8]; vrrp_log(VRRP_DBG1, "vrrpd_send_adv(%s, %s_priority)", vr->vvr_conf.vvc_name, zero_pri ? "zero" : "non_zero"); assert(vr->vvr_pif->vvi_pip != NULL); if (vr->vvr_pif->vvi_pip == NULL) { vrrp_log(VRRP_DBG0, "vrrpd_send_adv(%s): no primary IP " "address", vr->vvr_conf.vvc_name); return (VRRP_EINVAL); } if (vr->vvr_conf.vvc_af == AF_INET) { return (vrrpd_send_adv_v4(vr, (uchar_t *)buf, sizeof (buf), zero_pri)); } else { return (vrrpd_send_adv_v6(vr, (uchar_t *)buf, sizeof (buf), zero_pri)); } } static void vrrpd_process_adv(vrrp_vr_t *vr, vrrp_addr_t *from, vrrp_pkt_t *vp) { vrrp_vr_conf_t *conf = &vr->vvr_conf; char peer[INET6_ADDRSTRLEN]; char local[INET6_ADDRSTRLEN]; int addr_cmp; uint16_t peer_adver_int; /* LINTED E_CONSTANT_CONDITION */ VRRPADDR2STR(vr->vvr_conf.vvc_af, from, peer, INET6_ADDRSTRLEN, _B_FALSE); vrrp_log(VRRP_DBG1, "vrrpd_process_adv(%s) from %s", conf->vvc_name, peer); if (vr->vvr_state <= VRRP_STATE_INIT) { vrrp_log(VRRP_DBG1, "vrrpd_process_adv(%s): state: %s, not " "ready", conf->vvc_name, vrrp_state2str(vr->vvr_state)); return; } peer_adver_int = CENTISEC2MSEC(ntohs(vp->vp_rsvd_adver_int) & 0x0fff); /* LINTED E_CONSTANT_CONDITION */ VRRPADDR2STR(vr->vvr_pif->vvi_af, &vr->vvr_pif->vvi_pip->vip_addr, local, INET6_ADDRSTRLEN, _B_FALSE); vrrp_log(VRRP_DBG1, "vrrpd_process_adv(%s): local/state/pri" "(%s/%s/%d) peer/pri/intv(%s/%d/%d)", conf->vvc_name, local, vrrp_state2str(vr->vvr_state), conf->vvc_pri, peer, vp->vp_prio, peer_adver_int); addr_cmp = ipaddr_cmp(vr->vvr_pif->vvi_af, from, &vr->vvr_pif->vvi_pip->vip_addr); if (addr_cmp == 0) { vrrp_log(VRRP_DBG1, "vrrpd_process_adv(%s): local message", conf->vvc_name); return; } else if (conf->vvc_pri == vp->vp_prio) { vrrp_log(VRRP_DBG1, "vrrpd_process_adv(%s): peer IP %s is %s" " than the local IP %s", conf->vvc_name, peer, addr_cmp > 0 ? "greater" : "less", local); } if (conf->vvc_pri == 255) { vrrp_log(VRRP_ERR, "vrrpd_process_adv(%s): virtual address " "owner received advertisement from %s", conf->vvc_name, peer); return; } (void) gettimeofday(&vr->vvr_peer_time, NULL); (void) memcpy(&vr->vvr_peer_addr, from, sizeof (vrrp_addr_t)); vr->vvr_peer_prio = vp->vp_prio; vr->vvr_peer_adver_int = peer_adver_int; if (vr->vvr_state == VRRP_STATE_BACKUP) { vr->vvr_master_adver_int = vr->vvr_peer_adver_int; if ((vp->vp_prio == VRRP_PRIO_ZERO) || (conf->vvc_preempt == _B_FALSE || vp->vp_prio >= conf->vvc_pri)) { (void) iu_cancel_timer(vrrpd_timerq, vr->vvr_timer_id, NULL); if (vp->vp_prio == VRRP_PRIO_ZERO) { /* the master stops participating in VRRP */ vr->vvr_timeout = SKEW_TIME_VR(vr); } else { vr->vvr_timeout = MASTER_DOWN_INTERVAL_VR(vr); } if ((vr->vvr_timer_id = iu_schedule_timer_ms( vrrpd_timerq, vr->vvr_timeout, vrrp_b2m_timeout, vr)) == -1) { vrrp_log(VRRP_ERR, "vrrpd_process_adv(%s): " "start vrrp_b2m_timeout(%d) failed", conf->vvc_name, vr->vvr_timeout); } else { vrrp_log(VRRP_DBG1, "vrrpd_process_adv(%s): " "start vrrp_b2m_timeout(%d)", conf->vvc_name, vr->vvr_timeout); } } } else if (vr->vvr_state == VRRP_STATE_MASTER) { if (vp->vp_prio == VRRP_PRIO_ZERO) { (void) vrrpd_send_adv(vr, _B_FALSE); (void) iu_cancel_timer(vrrpd_timerq, vr->vvr_timer_id, NULL); if ((vr->vvr_timer_id = iu_schedule_timer_ms( vrrpd_timerq, vr->vvr_timeout, vrrp_adv_timeout, vr)) == -1) { vrrp_log(VRRP_ERR, "vrrpd_process_adv(%s): " "start vrrp_adv_timeout(%d) failed", conf->vvc_name, vr->vvr_timeout); } else { vrrp_log(VRRP_DBG1, "vrrpd_process_adv(%s): " "start vrrp_adv_timeout(%d)", conf->vvc_name, vr->vvr_timeout); } } else if (vp->vp_prio > conf->vvc_pri || (vp->vp_prio == conf->vvc_pri && addr_cmp > 0)) { (void) vrrpd_state_m2b(vr); } } else { assert(_B_FALSE); } } static vrrp_err_t vrrpd_process_vrrp(vrrp_intf_t *pif, vrrp_pkt_t *vp, size_t len, vrrp_addr_t *from) { vrrp_vr_t *vr; uint8_t vers_type; uint16_t saved_cksum, cksum; char peer[INET6_ADDRSTRLEN]; /* LINTED E_CONSTANT_CONDITION */ VRRPADDR2STR(pif->vvi_af, from, peer, INET6_ADDRSTRLEN, _B_FALSE); vrrp_log(VRRP_DBG0, "vrrpd_process_vrrp(%s) from %s", pif->vvi_ifname, peer); if (len < sizeof (vrrp_pkt_t)) { vrrp_log(VRRP_ERR, "vrrpd_process_vrrp(%s): invalid message " "length %d", len); return (VRRP_EINVAL); } /* * Verify: VRRP version number and packet type. */ vers_type = ((vp->vp_vers_type & VRRP_VER_MASK) >> 4); if (vers_type != VRRP_VERSION) { vrrp_log(VRRP_ERR, "vrrpd_process_vrrp(%s) unsupported " "version %d", pif->vvi_ifname, vers_type); return (VRRP_EINVAL); } if (vp->vp_ipnum == 0) { vrrp_log(VRRP_ERR, "vrrpd_process_vrrp(%s): zero IPvX count", pif->vvi_ifname); return (VRRP_EINVAL); } if (len - sizeof (vrrp_pkt_t) != vp->vp_ipnum * (pif->vvi_af == AF_INET ? sizeof (struct in_addr) : sizeof (struct in6_addr))) { vrrp_log(VRRP_ERR, "vrrpd_process_vrrp(%s): invalid IPvX count" " %d", pif->vvi_ifname, vp->vp_ipnum); return (VRRP_EINVAL); } vers_type = (vp->vp_vers_type & VRRP_TYPE_MASK); /* * verify: VRRP checksum. Note that vrrp_cksum returns network byte * order checksum value; */ saved_cksum = vp->vp_chksum; vp->vp_chksum = 0; if (pif->vvi_af == AF_INET) { cksum = vrrp_cksum4(&from->in4.sin_addr, &vrrp_muladdr4.in4.sin_addr, len, vp); } else { cksum = vrrp_cksum6(&from->in6.sin6_addr, &vrrp_muladdr6.in6.sin6_addr, len, vp); } if (cksum != saved_cksum) { vrrp_log(VRRP_ERR, "vrrpd_process_vrrp(%s) invalid " "checksum: expected/real(0x%x/0x%x)", pif->vvi_ifname, cksum, saved_cksum); return (VRRP_EINVAL); } if ((vr = vrrpd_lookup_vr_by_vrid(pif->vvi_ifname, vp->vp_vrid, pif->vvi_af)) != NULL && vers_type == VRRP_PKT_ADVERT) { vrrpd_process_adv(vr, from, vp); } else { vrrp_log(VRRP_DBG1, "vrrpd_process_vrrp(%s) VRID(%d/%s) " "not configured", pif->vvi_ifname, vp->vp_vrid, af_str(pif->vvi_af)); } return (VRRP_SUCCESS); } /* * IPv4 socket, the IPv4 header is included. */ static vrrp_err_t vrrpd_process_adv_v4(vrrp_intf_t *pif, struct msghdr *msgp, size_t len) { char abuf[INET6_ADDRSTRLEN]; struct ip *ip; vrrp_log(VRRP_DBG0, "vrrpd_process_adv_v4(%s, %d)", pif->vvi_ifname, len); ip = (struct ip *)msgp->msg_iov->iov_base; /* Sanity check */ if (len < sizeof (struct ip) || len < ntohs(ip->ip_len)) { vrrp_log(VRRP_ERR, "vrrpd_process_adv_v4(%s): invalid length " "%d", pif->vvi_ifname, len); return (VRRP_EINVAL); } assert(ip->ip_v == IPV4_VERSION); assert(ip->ip_p == IPPROTO_VRRP); assert(msgp->msg_namelen == sizeof (struct sockaddr_in)); if (vrrp_muladdr4.in4.sin_addr.s_addr != ip->ip_dst.s_addr) { vrrp_log(VRRP_ERR, "vrrpd_process_adv_v4(%s): invalid " "destination %s", pif->vvi_ifname, inet_ntop(pif->vvi_af, &(ip->ip_dst), abuf, sizeof (abuf))); return (VRRP_EINVAL); } if (ip->ip_ttl != VRRP_IP_TTL) { vrrp_log(VRRP_ERR, "vrrpd_process_adv_v4(%s): invalid " "ttl %d", pif->vvi_ifname, ip->ip_ttl); return (VRRP_EINVAL); } /* * Note that the ip_len contains only the IP payload length. */ return (vrrpd_process_vrrp(pif, /* LINTED E_BAD_PTR_CAST_ALIGN */ (vrrp_pkt_t *)((char *)ip + ip->ip_hl * 4), ntohs(ip->ip_len), (vrrp_addr_t *)msgp->msg_name)); } /* * IPv6 socket, check the ancillary_data. */ static vrrp_err_t vrrpd_process_adv_v6(vrrp_intf_t *pif, struct msghdr *msgp, size_t len) { struct cmsghdr *cmsgp; uchar_t *cmsg_datap; struct in6_pktinfo *pktinfop; char abuf[INET6_ADDRSTRLEN]; int ttl; vrrp_log(VRRP_DBG1, "vrrpd_process_adv_v6(%s, %d)", pif->vvi_ifname, len); /* Sanity check */ if (len < sizeof (vrrp_pkt_t)) { vrrp_log(VRRP_ERR, "vrrpd_process_adv_v6(%s): invalid length " "%d", pif->vvi_ifname, len); return (VRRP_EINVAL); } assert(msgp->msg_namelen == sizeof (struct sockaddr_in6)); for (cmsgp = CMSG_FIRSTHDR(msgp); cmsgp != NULL; cmsgp = CMSG_NXTHDR(msgp, cmsgp)) { assert(cmsgp->cmsg_level == IPPROTO_IPV6); cmsg_datap = CMSG_DATA(cmsgp); switch (cmsgp->cmsg_type) { case IPV6_HOPLIMIT: /* LINTED E_BAD_PTR_CAST_ALIGN */ if ((ttl = *(int *)cmsg_datap) == VRRP_IP_TTL) break; vrrp_log(VRRP_ERR, "vrrpd_process_adv_v4(%s): invalid " "ttl %d", pif->vvi_ifname, ttl); return (VRRP_EINVAL); case IPV6_PKTINFO: /* LINTED E_BAD_PTR_CAST_ALIGN */ pktinfop = (struct in6_pktinfo *)cmsg_datap; if (IN6_ARE_ADDR_EQUAL(&pktinfop->ipi6_addr, &vrrp_muladdr6.in6.sin6_addr)) { break; } vrrp_log(VRRP_ERR, "vrrpd_process_adv_v4(%s): invalid " "destination %s", pif->vvi_ifname, inet_ntop(pif->vvi_af, &pktinfop->ipi6_addr, abuf, sizeof (abuf))); return (VRRP_EINVAL); } } return (vrrpd_process_vrrp(pif, msgp->msg_iov->iov_base, len, msgp->msg_name)); } /* ARGSUSED */ static void vrrpd_sock_handler(iu_eh_t *eh, int s, short events, iu_event_id_t id, void *arg) { struct msghdr msg; vrrp_addr_t from; uint64_t buf[(IP_MAXPACKET + 1)/8]; uint64_t ancillary_data[(IP_MAXPACKET + 1)/8]; vrrp_intf_t *pif = arg; int af = pif->vvi_af; int len; struct iovec iov; vrrp_log(VRRP_DBG1, "vrrpd_sock_handler(%s)", pif->vvi_ifname); msg.msg_name = (struct sockaddr *)&from; msg.msg_namelen = (af == AF_INET) ? sizeof (struct sockaddr_in) : sizeof (struct sockaddr_in6); iov.iov_base = (char *)buf; iov.iov_len = sizeof (buf); msg.msg_iov = &iov; msg.msg_iovlen = 1; msg.msg_control = ancillary_data; msg.msg_controllen = sizeof (ancillary_data); if ((len = recvmsg(s, &msg, 0)) == -1) { vrrp_log(VRRP_ERR, "vrrpd_sock_handler() recvmsg(%s) " "failed: %s", pif->vvi_ifname, strerror(errno)); return; } /* * Ignore packets whose control buffers that don't fit */ if (msg.msg_flags & (MSG_TRUNC|MSG_CTRUNC)) { vrrp_log(VRRP_ERR, "vrrpd_sock_handler() %s buffer not " "big enough", pif->vvi_ifname); return; } if (af == AF_INET) (void) vrrpd_process_adv_v4(pif, &msg, len); else (void) vrrpd_process_adv_v6(pif, &msg, len); } /* * Create the socket which is used to receive VRRP packets. Virtual routers * that configured on the same physical interface share the same socket. */ static vrrp_err_t vrrpd_init_rxsock(vrrp_vr_t *vr) { vrrp_intf_t *pif; /* Physical interface used to recv packets */ struct group_req greq; struct sockaddr_storage *muladdr; int af, proto; int on = 1; vrrp_err_t err = VRRP_SUCCESS; vrrp_log(VRRP_DBG1, "vrrpd_init_rxsock(%s)", vr->vvr_conf.vvc_name); /* * The RX sockets may already been initialized. */ if ((pif = vr->vvr_pif) != NULL) { vrrp_log(VRRP_DBG1, "vrrpd_init_rxsock(%s) already done on %s", vr->vvr_conf.vvc_name, pif->vvi_ifname); assert(pif->vvi_sockfd != -1); return (VRRP_SUCCESS); } /* * If no IP addresses configured on the primary interface, * return failure. */ af = vr->vvr_conf.vvc_af; pif = vrrpd_lookup_if(vr->vvr_conf.vvc_link, af); if (pif == NULL) { vrrp_log(VRRP_DBG1, "vrrpd_init_rxsock(%s): no IP address " "over %s/%s", vr->vvr_conf.vvc_name, vr->vvr_conf.vvc_link, af_str(af)); return (VRRP_ENOPRIM); } proto = (af == AF_INET ? IPPROTO_IP : IPPROTO_IPV6); if (pif->vvi_nvr++ == 0) { assert(pif->vvi_sockfd < 0); pif->vvi_sockfd = socket(af, SOCK_RAW, IPPROTO_VRRP); if (pif->vvi_sockfd < 0) { vrrp_log(VRRP_ERR, "vrrpd_init_rxsock(%s): socket() " "failed %s", vr->vvr_conf.vvc_name, strerror(errno)); err = VRRP_ESYS; goto done; } /* * Join the multicast group to receive VRRP packets. */ if (af == AF_INET) { muladdr = (struct sockaddr_storage *) (void *)&vrrp_muladdr4; } else { muladdr = (struct sockaddr_storage *) (void *)&vrrp_muladdr6; } greq.gr_interface = pif->vvi_ifindex; (void) memcpy(&greq.gr_group, muladdr, sizeof (struct sockaddr_storage)); if (setsockopt(pif->vvi_sockfd, proto, MCAST_JOIN_GROUP, &greq, sizeof (struct group_req)) < 0) { vrrp_log(VRRP_ERR, "vrrpd_init_rxsock(%s): " "join_group(%d) failed: %s", vr->vvr_conf.vvc_name, pif->vvi_ifindex, strerror(errno)); err = VRRP_ESYS; goto done; } else { vrrp_log(VRRP_DBG1, "vrrpd_init_rxsock(%s): " "join_group(%d) succeeded", vr->vvr_conf.vvc_name, pif->vvi_ifindex); } /* * Unlike IPv4, the IPv6 raw socket does not pass the IP header * when a packet is received. Call setsockopt() to receive such * information. */ if (af == AF_INET6) { /* * Enable receipt of destination address info */ if (setsockopt(pif->vvi_sockfd, proto, IPV6_RECVPKTINFO, (char *)&on, sizeof (on)) < 0) { vrrp_log(VRRP_ERR, "vrrpd_init_rxsock(%s): " "enable recvpktinfo failed: %s", vr->vvr_conf.vvc_name, strerror(errno)); err = VRRP_ESYS; goto done; } /* * Enable receipt of hoplimit info */ if (setsockopt(pif->vvi_sockfd, proto, IPV6_RECVHOPLIMIT, (char *)&on, sizeof (on)) < 0) { vrrp_log(VRRP_ERR, "vrrpd_init_rxsock(%s): " "enable recvhoplimit failed: %s", vr->vvr_conf.vvc_name, strerror(errno)); err = VRRP_ESYS; goto done; } } if ((pif->vvi_eid = iu_register_event(vrrpd_eh, pif->vvi_sockfd, POLLIN, vrrpd_sock_handler, pif)) == -1) { vrrp_log(VRRP_ERR, "vrrpd_init_rxsock(%s): " "iu_register_event() failed", vr->vvr_conf.vvc_name); err = VRRP_ESYS; goto done; } } else { vrrp_log(VRRP_DBG1, "vrrpd_init_rxsock(%s) over %s already " "done %d", vr->vvr_conf.vvc_name, pif->vvi_ifname, pif->vvi_nvr); assert(IS_PRIMARY_INTF(pif)); } done: vr->vvr_pif = pif; if (err != VRRP_SUCCESS) vrrpd_fini_rxsock(vr); return (err); } /* * Delete the socket which is used to receive VRRP packets for the given * VRRP router. Since all virtual routers that configured on the same * physical interface share the same socket, the socket is only closed * when the last VRRP router share this socket is deleted. */ static void vrrpd_fini_rxsock(vrrp_vr_t *vr) { vrrp_intf_t *pif = vr->vvr_pif; vrrp_log(VRRP_DBG1, "vrrpd_fini_rxsock(%s)", vr->vvr_conf.vvc_name); if (pif == NULL) return; if (--pif->vvi_nvr == 0) { vrrp_log(VRRP_DBG1, "vrrpd_fini_rxsock(%s) over %s", vr->vvr_conf.vvc_name, pif->vvi_ifname); (void) iu_unregister_event(vrrpd_eh, pif->vvi_eid, NULL); (void) close(pif->vvi_sockfd); pif->vvi_pip = NULL; pif->vvi_sockfd = -1; pif->vvi_eid = -1; } else { vrrp_log(VRRP_DBG1, "vrrpd_fini_rxsock(%s) over %s %d", vr->vvr_conf.vvc_name, pif->vvi_ifname, pif->vvi_nvr); } vr->vvr_pif = NULL; } /* * Create the socket which is used to send VRRP packets. Further, set * the IFF_NOACCEPT flag based on the VRRP router's accept mode. */ static vrrp_err_t vrrpd_init_txsock(vrrp_vr_t *vr) { int af; vrrp_intf_t *vif; vrrp_err_t err; vrrp_log(VRRP_DBG1, "vrrpd_init_txsock(%s)", vr->vvr_conf.vvc_name); if (vr->vvr_vif != NULL) { vrrp_log(VRRP_DBG1, "vrrpd_init_txsock(%s) already done on %s", vr->vvr_conf.vvc_name, vr->vvr_vif->vvi_ifname); return (VRRP_SUCCESS); } af = vr->vvr_conf.vvc_af; if ((vif = vrrpd_lookup_if(vr->vvr_vnic, af)) == NULL) { vrrp_log(VRRP_DBG1, "vrrpd_init_txsock(%s) no IP address over " "%s/%s", vr->vvr_conf.vvc_name, vr->vvr_vnic, af_str(af)); return (VRRP_ENOVIRT); } vr->vvr_vif = vif; if (vr->vvr_conf.vvc_af == AF_INET) err = vrrpd_init_txsock_v4(vr); else err = vrrpd_init_txsock_v6(vr); if (err != VRRP_SUCCESS) goto done; /* * The interface should start with IFF_NOACCEPT flag not set, only * call this function when the VRRP router requires IFF_NOACCEPT. */ if (!vr->vvr_conf.vvc_accept) err = vrrpd_set_noaccept(vr, _B_TRUE); done: if (err != VRRP_SUCCESS) { (void) close(vif->vvi_sockfd); vif->vvi_sockfd = -1; vr->vvr_vif = NULL; } return (err); } /* * Create the IPv4 socket which is used to send VRRP packets. Note that * the destination MAC address of VRRP advertisement must be the virtual * MAC address, so we specify the output interface to be the specific VNIC. */ static vrrp_err_t vrrpd_init_txsock_v4(vrrp_vr_t *vr) { vrrp_intf_t *vif; /* VNIC interface used to send packets */ vrrp_ip_t *vip; /* The first IP over the VNIC */ int on = 1; char off = 0; vrrp_err_t err = VRRP_SUCCESS; char abuf[INET6_ADDRSTRLEN]; vif = vr->vvr_vif; assert(vr->vvr_conf.vvc_af == AF_INET); assert(vif != NULL); vrrp_log(VRRP_DBG1, "vrrpd_init_txsock_v4(%s) over %s", vr->vvr_conf.vvc_name, vif->vvi_ifname); if (vif->vvi_sockfd != -1) { vrrp_log(VRRP_DBG1, "vrrpd_init_txsock_v4(%s) already done " "over %s", vr->vvr_conf.vvc_name, vif->vvi_ifname); return (VRRP_SUCCESS); } vif->vvi_sockfd = socket(vif->vvi_af, SOCK_RAW, IPPROTO_VRRP); if (vif->vvi_sockfd < 0) { vrrp_log(VRRP_ERR, "vrrpd_init_txsock_v4(%s): socket() " "failed: %s", vr->vvr_conf.vvc_name, strerror(errno)); err = VRRP_ESYS; goto done; } /* * Include the IP header, so that we can specify the IP address/ttl. */ if (setsockopt(vif->vvi_sockfd, IPPROTO_IP, IP_HDRINCL, (char *)&on, sizeof (on)) < 0) { vrrp_log(VRRP_ERR, "vrrpd_init_txsock_v4(%s): ip_hdrincl " "failed: %s", vr->vvr_conf.vvc_name, strerror(errno)); err = VRRP_ESYS; goto done; } /* * Disable multicast loopback. */ if (setsockopt(vif->vvi_sockfd, IPPROTO_IP, IP_MULTICAST_LOOP, &off, sizeof (char)) == -1) { vrrp_log(VRRP_ERR, "vrrpd_init_txsock_v4(%s): disable " "multicast_loop failed: %s", vr->vvr_conf.vvc_name, strerror(errno)); err = VRRP_ESYS; goto done; } vip = TAILQ_FIRST(&vif->vvi_iplist); /* LINTED E_CONSTANT_CONDITION */ VRRPADDR2STR(vif->vvi_af, &vip->vip_addr, abuf, INET6_ADDRSTRLEN, _B_FALSE); /* * Set the output interface to send the VRRP packet. */ if (setsockopt(vif->vvi_sockfd, IPPROTO_IP, IP_MULTICAST_IF, &vip->vip_addr.in4.sin_addr, sizeof (struct in_addr)) < 0) { vrrp_log(VRRP_ERR, "vrrpd_init_txsock_v4(%s): multcast_if(%s) " "failed: %s", vr->vvr_conf.vvc_name, abuf, strerror(errno)); err = VRRP_ESYS; } else { vrrp_log(VRRP_DBG0, "vrrpd_init_txsock_v4(%s): multcast_if(%s) " "succeed", vr->vvr_conf.vvc_name, abuf); } done: if (err != VRRP_SUCCESS) { (void) close(vif->vvi_sockfd); vif->vvi_sockfd = -1; } return (err); } /* * Create the IPv6 socket which is used to send VRRP packets. Note that * the destination must be the virtual MAC address, so we specify the output * interface to be the specific VNIC. */ static vrrp_err_t vrrpd_init_txsock_v6(vrrp_vr_t *vr) { vrrp_intf_t *vif; /* VNIC interface used to send packets */ int off = 0, ttl = VRRP_IP_TTL; vrrp_err_t err = VRRP_SUCCESS; vif = vr->vvr_vif; assert(vr->vvr_conf.vvc_af == AF_INET6); assert(vif != NULL); vrrp_log(VRRP_DBG1, "vrrpd_init_txsock_v6(%s) over %s", vr->vvr_conf.vvc_name, vif->vvi_ifname); if (vif->vvi_sockfd != -1) { vrrp_log(VRRP_DBG1, "vrrpd_init_txsock_v6(%s) already done " "over %s", vr->vvr_conf.vvc_name, vif->vvi_ifname); return (VRRP_SUCCESS); } vif->vvi_sockfd = socket(vif->vvi_af, SOCK_RAW, IPPROTO_VRRP); if (vif->vvi_sockfd < 0) { vrrp_log(VRRP_ERR, "vrrpd_init_txsock_v6(%s): socket() " "failed: %s", vr->vvr_conf.vvc_name, strerror(errno)); err = VRRP_ESYS; goto done; } /* * Disable multicast loopback. */ if (setsockopt(vif->vvi_sockfd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &off, sizeof (int)) == -1) { vrrp_log(VRRP_ERR, "vrrpd_init_txsock_v6(%s): disable " "multicast_loop failed: %s", vr->vvr_conf.vvc_name, strerror(errno)); err = VRRP_ESYS; goto done; } /* * Set the multicast TTL. */ if (setsockopt(vif->vvi_sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &ttl, sizeof (int)) == -1) { vrrp_log(VRRP_ERR, "vrrpd_init_txsock_v6(%s): enable " "multicast_hops %d failed: %s", vr->vvr_conf.vvc_name, ttl, strerror(errno)); err = VRRP_ESYS; goto done; } /* * Set the output interface to send the VRRP packet. */ if (setsockopt(vif->vvi_sockfd, IPPROTO_IPV6, IPV6_MULTICAST_IF, &vif->vvi_ifindex, sizeof (uint32_t)) < 0) { vrrp_log(VRRP_ERR, "vrrpd_init_txsock_v6(%s): multicast_if(%d) " "failed: %s", vr->vvr_conf.vvc_name, vif->vvi_ifindex, strerror(errno)); err = VRRP_ESYS; } else { vrrp_log(VRRP_DBG1, "vrrpd_init_txsock_v6(%s): multicast_if(%d)" " succeed", vr->vvr_conf.vvc_name, vif->vvi_ifindex); } done: if (err != VRRP_SUCCESS) { (void) close(vif->vvi_sockfd); vif->vvi_sockfd = -1; } return (err); } /* * Delete the socket which is used to send VRRP packets. Further, clear * the IFF_NOACCEPT flag based on the VRRP router's accept mode. */ static void vrrpd_fini_txsock(vrrp_vr_t *vr) { vrrp_intf_t *vif = vr->vvr_vif; vrrp_log(VRRP_DBG1, "vrrpd_fini_txsock(%s)", vr->vvr_conf.vvc_name); if (vif != NULL) { if (!vr->vvr_conf.vvc_accept) (void) vrrpd_set_noaccept(vr, _B_FALSE); (void) close(vif->vvi_sockfd); vif->vvi_sockfd = -1; vr->vvr_vif = NULL; } } /* * Given the the pseudo header cksum value (sum), caculate the cksum with * the rest of VRRP packet. */ static uint16_t in_cksum(int sum, uint16_t plen, void *p) { int nleft; uint16_t *w; uint16_t answer; uint16_t odd_byte = 0; nleft = plen; w = (uint16_t *)p; while (nleft > 1) { sum += *w++; nleft -= 2; } /* mop up an odd byte, if necessary */ if (nleft == 1) { *(uchar_t *)(&odd_byte) = *(uchar_t *)w; sum += odd_byte; } /* * add back carry outs from top 16 bits to low 16 bits */ sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */ sum += (sum >> 16); /* add carry */ answer = ~sum; /* truncate to 16 bits */ return (answer == 0 ? ~0 : answer); } /* Pseudo header for v4 */ struct pshv4 { struct in_addr ph4_src; struct in_addr ph4_dst; uint8_t ph4_zero; /* always zero */ uint8_t ph4_protocol; /* protocol used, IPPROTO_VRRP */ uint16_t ph4_len; /* VRRP payload len */ }; /* * Checksum routine for VRRP checksum. Note that plen is the upper-layer * packet length (in the host byte order), and both IP source and destination * addresses are in the network byte order. */ static uint16_t vrrp_cksum4(struct in_addr *src, struct in_addr *dst, uint16_t plen, vrrp_pkt_t *vp) { struct pshv4 ph4; int nleft; uint16_t *w; int sum = 0; ph4.ph4_src = *src; ph4.ph4_dst = *dst; ph4.ph4_zero = 0; ph4.ph4_protocol = IPPROTO_VRRP; ph4.ph4_len = htons(plen); /* * Our algorithm is simple, using a 32 bit accumulator (sum), * we add sequential 16 bit words to it, and at the end, fold * back all the carry bits from the top 16 bits into the lower * 16 bits. */ nleft = sizeof (struct pshv4); w = (uint16_t *)&ph4; while (nleft > 0) { sum += *w++; nleft -= 2; } return (in_cksum(sum, plen, vp)); } /* Pseudo header for v6 */ struct pshv6 { struct in6_addr ph6_src; struct in6_addr ph6_dst; uint32_t ph6_len; /* VRRP payload len */ uint32_t ph6_zero : 24, ph6_protocol : 8; /* protocol used, IPPROTO_VRRP */ }; /* * Checksum routine for VRRP checksum. Note that plen is the upper-layer * packet length (in the host byte order), and both IP source and destination * addresses are in the network byte order. */ static uint16_t vrrp_cksum6(struct in6_addr *src, struct in6_addr *dst, uint16_t plen, vrrp_pkt_t *vp) { struct pshv6 ph6; int nleft; uint16_t *w; int sum = 0; ph6.ph6_src = *src; ph6.ph6_dst = *dst; ph6.ph6_zero = 0; ph6.ph6_protocol = IPPROTO_VRRP; ph6.ph6_len = htonl((uint32_t)plen); /* * Our algorithm is simple, using a 32 bit accumulator (sum), * we add sequential 16 bit words to it, and at the end, fold * back all the carry bits from the top 16 bits into the lower * 16 bits. */ nleft = sizeof (struct pshv6); w = (uint16_t *)&ph6; while (nleft > 0) { sum += *w++; nleft -= 2; } return (in_cksum(sum, plen, vp)); } vrrp_err_t vrrpd_state_i2m(vrrp_vr_t *vr) { vrrp_err_t err; vrrp_log(VRRP_DBG1, "vrrpd_state_i2m(%s)", vr->vvr_conf.vvc_name); vrrpd_state_trans(VRRP_STATE_INIT, VRRP_STATE_MASTER, vr); if ((err = vrrpd_virtualip_update(vr, _B_FALSE)) != VRRP_SUCCESS) return (err); (void) vrrpd_send_adv(vr, _B_FALSE); vr->vvr_err = VRRP_SUCCESS; vr->vvr_timeout = vr->vvr_conf.vvc_adver_int; if ((vr->vvr_timer_id = iu_schedule_timer_ms(vrrpd_timerq, vr->vvr_timeout, vrrp_adv_timeout, vr)) == -1) { vrrp_log(VRRP_ERR, "vrrpd_state_i2m(): unable to start timer"); return (VRRP_ESYS); } else { vrrp_log(VRRP_DBG1, "vrrpd_state_i2m(%s): start " "vrrp_adv_timeout(%d)", vr->vvr_conf.vvc_name, vr->vvr_timeout); } return (VRRP_SUCCESS); } vrrp_err_t vrrpd_state_i2b(vrrp_vr_t *vr) { vrrp_err_t err; vrrp_log(VRRP_DBG1, "vrrpd_state_i2b(%s)", vr->vvr_conf.vvc_name); vrrpd_state_trans(VRRP_STATE_INIT, VRRP_STATE_BACKUP, vr); if ((err = vrrpd_virtualip_update(vr, _B_FALSE)) != VRRP_SUCCESS) return (err); /* * Reinitialize the Master advertisement interval to be the configured * value. */ vr->vvr_err = VRRP_SUCCESS; vr->vvr_master_adver_int = vr->vvr_conf.vvc_adver_int; vr->vvr_timeout = MASTER_DOWN_INTERVAL_VR(vr); if ((vr->vvr_timer_id = iu_schedule_timer_ms(vrrpd_timerq, vr->vvr_timeout, vrrp_b2m_timeout, vr)) == -1) { vrrp_log(VRRP_ERR, "vrrpd_state_i2b(): unable to set timer"); return (VRRP_ESYS); } else { vrrp_log(VRRP_DBG1, "vrrpd_state_i2b(%s): start " "vrrp_b2m_timeout(%d)", vr->vvr_conf.vvc_name, vr->vvr_timeout); } return (VRRP_SUCCESS); } void vrrpd_state_m2i(vrrp_vr_t *vr) { vrrp_log(VRRP_DBG1, "vrrpd_state_m2i(%s)", vr->vvr_conf.vvc_name); vrrpd_state_trans(VRRP_STATE_MASTER, VRRP_STATE_INIT, vr); (void) vrrpd_virtualip_update(vr, _B_TRUE); bzero(&vr->vvr_peer, sizeof (vrrp_peer_t)); (void) iu_cancel_timer(vrrpd_timerq, vr->vvr_timer_id, NULL); } void vrrpd_state_b2i(vrrp_vr_t *vr) { vrrp_log(VRRP_DBG1, "vrrpd_state_b2i(%s)", vr->vvr_conf.vvc_name); bzero(&vr->vvr_peer, sizeof (vrrp_peer_t)); (void) iu_cancel_timer(vrrpd_timerq, vr->vvr_timer_id, NULL); vrrpd_state_trans(VRRP_STATE_BACKUP, VRRP_STATE_INIT, vr); (void) vrrpd_virtualip_update(vr, _B_TRUE); } /* ARGSUSED */ static void vrrp_b2m_timeout(iu_tq_t *tq, void *arg) { vrrp_vr_t *vr = (vrrp_vr_t *)arg; vrrp_log(VRRP_DBG1, "vrrp_b2m_timeout(%s)", vr->vvr_conf.vvc_name); (void) vrrpd_state_b2m(vr); } /* ARGSUSED */ static void vrrp_adv_timeout(iu_tq_t *tq, void *arg) { vrrp_vr_t *vr = (vrrp_vr_t *)arg; vrrp_log(VRRP_DBG1, "vrrp_adv_timeout(%s)", vr->vvr_conf.vvc_name); (void) vrrpd_send_adv(vr, _B_FALSE); if ((vr->vvr_timer_id = iu_schedule_timer_ms(vrrpd_timerq, vr->vvr_timeout, vrrp_adv_timeout, vr)) == -1) { vrrp_log(VRRP_ERR, "vrrp_adv_timeout(%s): start timer failed", vr->vvr_conf.vvc_name); } else { vrrp_log(VRRP_DBG1, "vrrp_adv_timeout(%s): start " "vrrp_adv_timeout(%d)", vr->vvr_conf.vvc_name, vr->vvr_timeout); } } vrrp_err_t vrrpd_state_b2m(vrrp_vr_t *vr) { vrrp_err_t err; vrrp_log(VRRP_DBG1, "vrrpd_state_b2m(%s)", vr->vvr_conf.vvc_name); vrrpd_state_trans(VRRP_STATE_BACKUP, VRRP_STATE_MASTER, vr); if ((err = vrrpd_virtualip_update(vr, _B_FALSE)) != VRRP_SUCCESS) return (err); (void) vrrpd_send_adv(vr, _B_FALSE); vr->vvr_timeout = vr->vvr_conf.vvc_adver_int; if ((vr->vvr_timer_id = iu_schedule_timer_ms(vrrpd_timerq, vr->vvr_timeout, vrrp_adv_timeout, vr)) == -1) { vrrp_log(VRRP_ERR, "vrrpd_state_b2m(%s): start timer failed", vr->vvr_conf.vvc_name); return (VRRP_ESYS); } else { vrrp_log(VRRP_DBG1, "vrrpd_state_b2m(%s): start " "vrrp_adv_timeout(%d)", vr->vvr_conf.vvc_name, vr->vvr_timeout); } return (VRRP_SUCCESS); } vrrp_err_t vrrpd_state_m2b(vrrp_vr_t *vr) { vrrp_err_t err; vrrp_log(VRRP_DBG1, "vrrpd_state_m2b(%s)", vr->vvr_conf.vvc_name); vrrpd_state_trans(VRRP_STATE_MASTER, VRRP_STATE_BACKUP, vr); if ((err = vrrpd_virtualip_update(vr, _B_FALSE)) != VRRP_SUCCESS) return (err); /* * Cancel the adver_timer. */ vr->vvr_master_adver_int = vr->vvr_peer_adver_int; (void) iu_cancel_timer(vrrpd_timerq, vr->vvr_timer_id, NULL); vr->vvr_timeout = MASTER_DOWN_INTERVAL_VR(vr); if ((vr->vvr_timer_id = iu_schedule_timer_ms(vrrpd_timerq, vr->vvr_timeout, vrrp_b2m_timeout, vr)) == -1) { vrrp_log(VRRP_ERR, "vrrpd_state_m2b(%s): start timer failed", vr->vvr_conf.vvc_name); } else { vrrp_log(VRRP_DBG1, "vrrpd_state_m2b(%s) start " "vrrp_b2m_timeout(%d)", vr->vvr_conf.vvc_name, vr->vvr_timeout); } return (VRRP_SUCCESS); } /* * Set the IFF_NOACCESS flag on the VNIC interface of the VRRP router * based on its access mode. */ static vrrp_err_t vrrpd_set_noaccept(vrrp_vr_t *vr, boolean_t on) { vrrp_intf_t *vif = vr->vvr_vif; uint64_t curr_flags; struct lifreq lifr; int s; vrrp_log(VRRP_DBG1, "vrrpd_set_noaccept(%s, %s)", vr->vvr_conf.vvc_name, on ? "on" : "off"); /* * Possibly no virtual address exists on this VRRP router yet. */ if (vif == NULL) return (VRRP_SUCCESS); vrrp_log(VRRP_DBG1, "vrrpd_set_noaccept(%s, %s)", vif->vvi_ifname, vrrp_state2str(vr->vvr_state)); s = (vif->vvi_af == AF_INET) ? vrrpd_ctlsock_fd : vrrpd_ctlsock6_fd; (void) strncpy(lifr.lifr_name, vif->vvi_ifname, sizeof (lifr.lifr_name)); if (ioctl(s, SIOCGLIFFLAGS, (caddr_t)&lifr) < 0) { if (errno != ENXIO && errno != ENOENT) { vrrp_log(VRRP_ERR, "vrrpd_set_noaccept(): " "SIOCGLIFFLAGS on %s failed: %s", vif->vvi_ifname, strerror(errno)); } return (VRRP_ESYS); } curr_flags = lifr.lifr_flags; if (on) lifr.lifr_flags |= IFF_NOACCEPT; else lifr.lifr_flags &= ~IFF_NOACCEPT; if (lifr.lifr_flags != curr_flags) { if (ioctl(s, SIOCSLIFFLAGS, (caddr_t)&lifr) < 0) { if (errno != ENXIO && errno != ENOENT) { vrrp_log(VRRP_ERR, "vrrpd_set_noaccept(%s): " "SIOCSLIFFLAGS 0x%llx on %s failed: %s", on ? "no_accept" : "accept", lifr.lifr_flags, vif->vvi_ifname, strerror(errno)); } return (VRRP_ESYS); } } return (VRRP_SUCCESS); } static vrrp_err_t vrrpd_virtualip_updateone(vrrp_intf_t *vif, vrrp_ip_t *ip, boolean_t checkonly) { vrrp_state_t state = vif->vvi_vr_state; struct lifreq lifr; char abuf[INET6_ADDRSTRLEN]; int af = vif->vvi_af; uint64_t curr_flags; int s; assert(IS_VIRTUAL_INTF(vif)); /* LINTED E_CONSTANT_CONDITION */ VRRPADDR2STR(af, &ip->vip_addr, abuf, INET6_ADDRSTRLEN, _B_FALSE); vrrp_log(VRRP_DBG1, "vrrpd_virtualip_updateone(%s, %s%s)", vif->vvi_ifname, abuf, checkonly ? ", checkonly" : ""); s = (af == AF_INET) ? vrrpd_ctlsock_fd : vrrpd_ctlsock6_fd; (void) strncpy(lifr.lifr_name, ip->vip_lifname, sizeof (lifr.lifr_name)); if (ioctl(s, SIOCGLIFFLAGS, (caddr_t)&lifr) < 0) { if (errno != ENXIO && errno != ENOENT) { vrrp_log(VRRP_ERR, "vrrpd_virtualip_updateone(%s): " "SIOCGLIFFLAGS on %s/%s failed: %s", vif->vvi_ifname, lifr.lifr_name, abuf, strerror(errno)); } return (VRRP_ESYS); } curr_flags = lifr.lifr_flags; if (state == VRRP_STATE_MASTER) lifr.lifr_flags |= IFF_UP; else lifr.lifr_flags &= ~IFF_UP; if (lifr.lifr_flags == curr_flags) return (VRRP_SUCCESS); if (checkonly) { vrrp_log(VRRP_ERR, "VRRP virtual IP %s/%s was brought %s", ip->vip_lifname, abuf, state == VRRP_STATE_MASTER ? "down" : "up"); return (VRRP_ESYS); } else if (ioctl(s, SIOCSLIFFLAGS, (caddr_t)&lifr) < 0) { if (errno != ENXIO && errno != ENOENT) { vrrp_log(VRRP_ERR, "vrrpd_virtualip_updateone(%s, %s): " "bring %s %s/%s failed: %s", vif->vvi_ifname, vrrp_state2str(state), state == VRRP_STATE_MASTER ? "up" : "down", ip->vip_lifname, abuf, strerror(errno)); } return (VRRP_ESYS); } return (VRRP_SUCCESS); } static vrrp_err_t vrrpd_virtualip_update(vrrp_vr_t *vr, boolean_t checkonly) { vrrp_state_t state; vrrp_intf_t *vif = vr->vvr_vif; vrrp_ip_t *ip, *nextip; char abuf[INET6_ADDRSTRLEN]; vrrp_err_t err; vrrp_log(VRRP_DBG1, "vrrpd_virtualip_update(%s, %s, %s)%s", vr->vvr_conf.vvc_name, vrrp_state2str(vr->vvr_state), vif->vvi_ifname, checkonly ? " checkonly" : ""); state = vr->vvr_state; assert(vif != NULL); assert(IS_VIRTUAL_INTF(vif)); assert(vif->vvi_vr_state != state); vif->vvi_vr_state = state; for (ip = TAILQ_FIRST(&vif->vvi_iplist); ip != NULL; ip = nextip) { nextip = TAILQ_NEXT(ip, vip_next); err = vrrpd_virtualip_updateone(vif, ip, _B_FALSE); if (!checkonly && err != VRRP_SUCCESS) { /* LINTED E_CONSTANT_CONDITION */ VRRPADDR2STR(vif->vvi_af, &ip->vip_addr, abuf, INET6_ADDRSTRLEN, _B_FALSE); vrrp_log(VRRP_DBG1, "vrrpd_virtualip_update() update " "%s over %s failed", abuf, vif->vvi_ifname); vrrpd_delete_ip(vif, ip); } } /* * The IP address is deleted when it is failed to be brought * up. If no IP addresses are left, delete this interface. */ if (!checkonly && TAILQ_EMPTY(&vif->vvi_iplist)) { vrrp_log(VRRP_DBG0, "vrrpd_virtualip_update(): " "no IP left over %s", vif->vvi_ifname); vrrpd_delete_if(vif, _B_TRUE); return (VRRP_ENOVIRT); } return (VRRP_SUCCESS); } void vrrpd_state_trans(vrrp_state_t prev_s, vrrp_state_t s, vrrp_vr_t *vr) { vrrp_log(VRRP_DBG1, "vrrpd_state_trans(%s): %s --> %s", vr->vvr_conf.vvc_name, vrrp_state2str(prev_s), vrrp_state2str(s)); assert(vr->vvr_state == prev_s); vr->vvr_state = s; vr->vvr_prev_state = prev_s; (void) gettimeofday(&vr->vvr_st_time, NULL); (void) vrrpd_post_event(vr->vvr_conf.vvc_name, prev_s, s); } static int vrrpd_post_event(const char *name, vrrp_state_t prev_st, vrrp_state_t st) { sysevent_id_t eid; nvlist_t *nvl = NULL; /* * sysevent is not supported in the non-global zone */ if (getzoneid() != GLOBAL_ZONEID) return (0); if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) goto failed; if (nvlist_add_uint8(nvl, VRRP_EVENT_VERSION, VRRP_EVENT_CUR_VERSION) != 0) goto failed; if (nvlist_add_string(nvl, VRRP_EVENT_ROUTER_NAME, name) != 0) goto failed; if (nvlist_add_uint8(nvl, VRRP_EVENT_STATE, st) != 0) goto failed; if (nvlist_add_uint8(nvl, VRRP_EVENT_PREV_STATE, prev_st) != 0) goto failed; if (sysevent_post_event(EC_VRRP, ESC_VRRP_STATE_CHANGE, SUNW_VENDOR, VRRP_EVENT_PUBLISHER, nvl, &eid) == 0) { nvlist_free(nvl); return (0); } failed: vrrp_log(VRRP_ERR, "vrrpd_post_event(): `state change (%s --> %s)' " "sysevent posting failed: %s", vrrp_state2str(prev_st), vrrp_state2str(st), strerror(errno)); if (nvl != NULL) nvlist_free(nvl); return (-1); } /* * timeval processing functions */ static int timeval_to_milli(struct timeval tv) { return ((int)(tv.tv_sec * 1000 + tv.tv_usec / 1000 + 0.5)); } static struct timeval timeval_delta(struct timeval t1, struct timeval t2) { struct timeval t; t.tv_sec = t1.tv_sec - t2.tv_sec; t.tv_usec = t1.tv_usec - t2.tv_usec; if (t.tv_usec < 0) { t.tv_usec += 1000000; t.tv_sec--; } return (t); } /* * print error messages to the terminal or to syslog */ static void vrrp_log(int level, char *message, ...) { va_list ap; int log_level = -1; va_start(ap, message); if (vrrp_logflag == 0) { if (level <= vrrp_debug_level) { /* * VRRP_ERR goes to stderr, others go to stdout */ FILE *out = (level <= VRRP_ERR) ? stderr : stdout; /* LINTED: E_SEC_PRINTF_VAR_FMT */ (void) vfprintf(out, message, ap); (void) fprintf(out, "\n"); (void) fflush(out); } va_end(ap); return; } /* * translate VRRP_* to LOG_* */ switch (level) { case VRRP_ERR: log_level = LOG_ERR; break; case VRRP_WARNING: log_level = LOG_WARNING; break; case VRRP_NOTICE: log_level = LOG_NOTICE; break; case VRRP_DBG0: log_level = LOG_INFO; break; default: log_level = LOG_DEBUG; break; } /* LINTED: E_SEC_PRINTF_VAR_FMT */ (void) vsyslog(log_level, message, ap); va_end(ap); }