/* * 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 "snoop.h" /* * IPv6 extension header masks. These are used by the print_ipv6_extensions() * function to return information to the caller about which extension headers * were processed. This can be useful if the caller wants to know if the * packet is an IPv6 fragment, for example. */ #define SNOOP_HOPOPTS 0x01U #define SNOOP_ROUTING 0x02U #define SNOOP_DSTOPTS 0x04U #define SNOOP_FRAGMENT 0x08U #define SNOOP_AH 0x10U #define SNOOP_ESP 0x20U #define SNOOP_IPV6 0x40U static void prt_routing_hdr(int, const struct ip6_rthdr *); static void prt_fragment_hdr(int, const struct ip6_frag *); static void prt_hbh_options(int, const struct ip6_hbh *); static void prt_dest_options(int, const struct ip6_dest *); static void print_route(const uchar_t *); static void print_ipoptions(const uchar_t *, int); static void print_ripso(const uchar_t *); static void print_cipso(const uchar_t *); /* Keep track of how many nested IP headers we have. */ unsigned int encap_levels; unsigned int total_encap_levels = 1; int interpret_ip(int flags, const struct ip *ip, int fraglen) { uchar_t *data; char buff[24]; boolean_t isfrag = B_FALSE; boolean_t morefrag; uint16_t fragoffset; int hdrlen; uint16_t iplen, uitmp; if (ip->ip_v == IPV6_VERSION) { iplen = interpret_ipv6(flags, (ip6_t *)ip, fraglen); return (iplen); } if (encap_levels == 0) total_encap_levels = 0; encap_levels++; total_encap_levels++; hdrlen = ip->ip_hl * 4; data = ((uchar_t *)ip) + hdrlen; iplen = ntohs(ip->ip_len) - hdrlen; fraglen -= hdrlen; if (fraglen > iplen) fraglen = iplen; if (fraglen < 0) { (void) snprintf(get_sum_line(), MAXLINE, "IP truncated: header missing %d bytes", -fraglen); encap_levels--; return (fraglen + iplen); } /* * We flag this as a fragment if the more fragments bit is set, or * if the fragment offset is non-zero. */ morefrag = (ntohs(ip->ip_off) & IP_MF) == 0 ? B_FALSE : B_TRUE; fragoffset = (ntohs(ip->ip_off) & 0x1FFF) * 8; if (morefrag || fragoffset != 0) isfrag = B_TRUE; src_name = addrtoname(AF_INET, &ip->ip_src); dst_name = addrtoname(AF_INET, &ip->ip_dst); if (flags & F_SUM) { if (isfrag) { (void) snprintf(get_sum_line(), MAXLINE, "%s IP fragment ID=%d Offset=%-4d MF=%d TOS=0x%x " "TTL=%d", getproto(ip->ip_p), ntohs(ip->ip_id), fragoffset, morefrag, ip->ip_tos, ip->ip_ttl); } else { (void) strlcpy(buff, inet_ntoa(ip->ip_dst), sizeof (buff)); uitmp = ntohs(ip->ip_len); (void) snprintf(get_sum_line(), MAXLINE, "IP D=%s S=%s LEN=%u%s, ID=%d, TOS=0x%x, TTL=%d", buff, inet_ntoa(ip->ip_src), uitmp, iplen > fraglen ? "?" : "", ntohs(ip->ip_id), ip->ip_tos, ip->ip_ttl); } } if (flags & F_DTAIL) { show_header("IP: ", "IP Header", iplen); show_space(); (void) snprintf(get_line(0, 0), get_line_remain(), "Version = %d", ip->ip_v); (void) snprintf(get_line(0, 0), get_line_remain(), "Header length = %d bytes", hdrlen); (void) snprintf(get_line(0, 0), get_line_remain(), "Type of service = 0x%02x", ip->ip_tos); (void) snprintf(get_line(0, 0), get_line_remain(), " xxx. .... = %d (precedence)", ip->ip_tos >> 5); (void) snprintf(get_line(0, 0), get_line_remain(), " %s", getflag(ip->ip_tos, IPTOS_LOWDELAY, "low delay", "normal delay")); (void) snprintf(get_line(0, 0), get_line_remain(), " %s", getflag(ip->ip_tos, IPTOS_THROUGHPUT, "high throughput", "normal throughput")); (void) snprintf(get_line(0, 0), get_line_remain(), " %s", getflag(ip->ip_tos, IPTOS_RELIABILITY, "high reliability", "normal reliability")); (void) snprintf(get_line(0, 0), get_line_remain(), " %s", getflag(ip->ip_tos, IPTOS_ECT, "ECN capable transport", "not ECN capable transport")); (void) snprintf(get_line(0, 0), get_line_remain(), " %s", getflag(ip->ip_tos, IPTOS_CE, "ECN congestion experienced", "no ECN congestion experienced")); /* warning: ip_len is signed in netinet/ip.h */ uitmp = ntohs(ip->ip_len); (void) snprintf(get_line(0, 0), get_line_remain(), "Total length = %u bytes%s", uitmp, iplen > fraglen ? " -- truncated" : ""); (void) snprintf(get_line(0, 0), get_line_remain(), "Identification = %d", ntohs(ip->ip_id)); /* warning: ip_off is signed in netinet/ip.h */ uitmp = ntohs(ip->ip_off); (void) snprintf(get_line(0, 0), get_line_remain(), "Flags = 0x%x", uitmp >> 12); (void) snprintf(get_line(0, 0), get_line_remain(), " %s", getflag(uitmp >> 8, IP_DF >> 8, "do not fragment", "may fragment")); (void) snprintf(get_line(0, 0), get_line_remain(), " %s", getflag(uitmp >> 8, IP_MF >> 8, "more fragments", "last fragment")); (void) snprintf(get_line(0, 0), get_line_remain(), "Fragment offset = %u bytes", fragoffset); (void) snprintf(get_line(0, 0), get_line_remain(), "Time to live = %d seconds/hops", ip->ip_ttl); (void) snprintf(get_line(0, 0), get_line_remain(), "Protocol = %d (%s)", ip->ip_p, getproto(ip->ip_p)); /* * XXX need to compute checksum and print whether it's correct */ (void) snprintf(get_line(0, 0), get_line_remain(), "Header checksum = %04x", ntohs(ip->ip_sum)); (void) snprintf(get_line(0, 0), get_line_remain(), "Source address = %s, %s", inet_ntoa(ip->ip_src), addrtoname(AF_INET, &ip->ip_src)); (void) snprintf(get_line(0, 0), get_line_remain(), "Destination address = %s, %s", inet_ntoa(ip->ip_dst), addrtoname(AF_INET, &ip->ip_dst)); /* Print IP options - if any */ print_ipoptions((const uchar_t *)(ip + 1), hdrlen - sizeof (struct ip)); show_space(); } /* * If we are in detail mode, and this is not the first fragment of * a fragmented packet, print out a little line stating this. * Otherwise, go to the next protocol layer only if this is not a * fragment, or we are in detail mode and this is the first fragment * of a fragmented packet. */ if (flags & F_DTAIL && fragoffset != 0) { (void) snprintf(get_detail_line(0, 0), MAXLINE, "%s: [%d byte(s) of data, continuation of IP ident=%d]", getproto(ip->ip_p), iplen, ntohs(ip->ip_id)); } else if (!isfrag || (flags & F_DTAIL) && isfrag && fragoffset == 0) { /* go to the next protocol layer */ if (fraglen > 0) { switch (ip->ip_p) { case IPPROTO_IP: break; case IPPROTO_ENCAP: (void) interpret_ip(flags, /* LINTED: alignment */ (const struct ip *)data, fraglen); break; case IPPROTO_ICMP: (void) interpret_icmp(flags, /* LINTED: alignment */ (struct icmp *)data, iplen, fraglen); break; case IPPROTO_IGMP: interpret_igmp(flags, data, iplen, fraglen); break; case IPPROTO_GGP: break; case IPPROTO_TCP: (void) interpret_tcp(flags, (struct tcphdr *)data, iplen, fraglen); break; case IPPROTO_ESP: (void) interpret_esp(flags, data, iplen, fraglen); break; case IPPROTO_AH: (void) interpret_ah(flags, data, iplen, fraglen); break; case IPPROTO_OSPF: interpret_ospf(flags, data, iplen, fraglen); break; case IPPROTO_EGP: case IPPROTO_PUP: break; case IPPROTO_UDP: (void) interpret_udp(flags, (struct udphdr *)data, iplen, fraglen); break; case IPPROTO_IDP: case IPPROTO_HELLO: case IPPROTO_ND: case IPPROTO_RAW: break; case IPPROTO_IPV6: /* IPV6 encap */ /* LINTED: alignment */ (void) interpret_ipv6(flags, (ip6_t *)data, iplen); break; case IPPROTO_SCTP: (void) interpret_sctp(flags, (struct sctp_hdr *)data, iplen, fraglen); break; } } } encap_levels--; return (iplen); } int interpret_ipv6(int flags, const ip6_t *ip6h, int fraglen) { uint8_t *data; int hdrlen, iplen; int version, flow, class; uchar_t proto; boolean_t isfrag = B_FALSE; uint8_t extmask; /* * The print_srcname and print_dstname strings are the hostname * parts of the verbose IPv6 header output, including the comma * and the space after the litteral address strings. */ char print_srcname[MAXHOSTNAMELEN + 2]; char print_dstname[MAXHOSTNAMELEN + 2]; char src_addrstr[INET6_ADDRSTRLEN]; char dst_addrstr[INET6_ADDRSTRLEN]; iplen = ntohs(ip6h->ip6_plen); hdrlen = IPV6_HDR_LEN; fraglen -= hdrlen; if (fraglen < 0) return (fraglen + hdrlen); data = ((uint8_t *)ip6h) + hdrlen; proto = ip6h->ip6_nxt; src_name = addrtoname(AF_INET6, &ip6h->ip6_src); dst_name = addrtoname(AF_INET6, &ip6h->ip6_dst); /* * Use endian-aware masks to extract traffic class and * flowinfo. Also, flowinfo is now 20 bits and class 8 * rather than 24 and 4. */ class = ntohl((ip6h->ip6_vcf & IPV6_FLOWINFO_TCLASS) >> 20); flow = ntohl(ip6h->ip6_vcf & IPV6_FLOWINFO_FLOWLABEL); /* * NOTE: the F_SUM and F_DTAIL flags are mutually exclusive, * so the code within the first part of the following if statement * will not affect the detailed printing of the packet. */ if (flags & F_SUM) { (void) snprintf(get_sum_line(), MAXLINE, "IPv6 S=%s D=%s LEN=%d HOPS=%d CLASS=0x%x FLOW=0x%x", src_name, dst_name, iplen, ip6h->ip6_hops, class, flow); } else if (flags & F_DTAIL) { (void) inet_ntop(AF_INET6, &ip6h->ip6_src, src_addrstr, INET6_ADDRSTRLEN); (void) inet_ntop(AF_INET6, &ip6h->ip6_dst, dst_addrstr, INET6_ADDRSTRLEN); version = ntohl(ip6h->ip6_vcf) >> 28; if (strcmp(src_name, src_addrstr) == 0) { print_srcname[0] = '\0'; } else { snprintf(print_srcname, sizeof (print_srcname), ", %s", src_name); } if (strcmp(dst_name, dst_addrstr) == 0) { print_dstname[0] = '\0'; } else { snprintf(print_dstname, sizeof (print_dstname), ", %s", dst_name); } show_header("IPv6: ", "IPv6 Header", iplen); show_space(); (void) snprintf(get_line(0, 0), get_line_remain(), "Version = %d", version); (void) snprintf(get_line(0, 0), get_line_remain(), "Traffic Class = %d", class); (void) snprintf(get_line(0, 0), get_line_remain(), "Flow label = 0x%x", flow); (void) snprintf(get_line(0, 0), get_line_remain(), "Payload length = %d", iplen); (void) snprintf(get_line(0, 0), get_line_remain(), "Next Header = %d (%s)", proto, getproto(proto)); (void) snprintf(get_line(0, 0), get_line_remain(), "Hop Limit = %d", ip6h->ip6_hops); (void) snprintf(get_line(0, 0), get_line_remain(), "Source address = %s%s", src_addrstr, print_srcname); (void) snprintf(get_line(0, 0), get_line_remain(), "Destination address = %s%s", dst_addrstr, print_dstname); show_space(); } /* * Print IPv6 Extension Headers, or skip them in the summary case. * Set isfrag to true if one of the extension headers encounterred * was a fragment header. */ if (proto == IPPROTO_HOPOPTS || proto == IPPROTO_DSTOPTS || proto == IPPROTO_ROUTING || proto == IPPROTO_FRAGMENT) { extmask = print_ipv6_extensions(flags, &data, &proto, &iplen, &fraglen); if ((extmask & SNOOP_FRAGMENT) != 0) { isfrag = B_TRUE; } } /* * We only want to print upper layer information if this is not * a fragment, or if we're printing in detail. Note that the * proto variable will be set to IPPROTO_NONE if this is a fragment * with a non-zero fragment offset. */ if (!isfrag || flags & F_DTAIL) { /* go to the next protocol layer */ switch (proto) { case IPPROTO_IP: break; case IPPROTO_ENCAP: /* LINTED: alignment */ (void) interpret_ip(flags, (const struct ip *)data, fraglen); break; case IPPROTO_ICMPV6: /* LINTED: alignment */ (void) interpret_icmpv6(flags, (icmp6_t *)data, iplen, fraglen); break; case IPPROTO_IGMP: interpret_igmp(flags, data, iplen, fraglen); break; case IPPROTO_GGP: break; case IPPROTO_TCP: (void) interpret_tcp(flags, (struct tcphdr *)data, iplen, fraglen); break; case IPPROTO_ESP: (void) interpret_esp(flags, data, iplen, fraglen); break; case IPPROTO_AH: (void) interpret_ah(flags, data, iplen, fraglen); break; case IPPROTO_EGP: case IPPROTO_PUP: break; case IPPROTO_UDP: (void) interpret_udp(flags, (struct udphdr *)data, iplen, fraglen); break; case IPPROTO_IDP: case IPPROTO_HELLO: case IPPROTO_ND: case IPPROTO_RAW: break; case IPPROTO_IPV6: /* LINTED: alignment */ (void) interpret_ipv6(flags, (const ip6_t *)data, iplen); break; case IPPROTO_SCTP: (void) interpret_sctp(flags, (struct sctp_hdr *)data, iplen, fraglen); break; case IPPROTO_OSPF: interpret_ospf6(flags, data, iplen, fraglen); break; } } return (iplen); } /* * ip_ext: data including the extension header. * iplen: length of the data remaining in the packet. * Returns a mask of IPv6 extension headers it processed. */ uint8_t print_ipv6_extensions(int flags, uint8_t **hdr, uint8_t *next, int *iplen, int *fraglen) { uint8_t *data_ptr; uchar_t proto = *next; boolean_t is_extension_header; struct ip6_hbh *ipv6ext_hbh; struct ip6_dest *ipv6ext_dest; struct ip6_rthdr *ipv6ext_rthdr; struct ip6_frag *ipv6ext_frag; uint32_t exthdrlen; uint8_t extmask = 0; if ((hdr == NULL) || (*hdr == NULL) || (next == NULL) || (iplen == 0)) return (0); data_ptr = *hdr; is_extension_header = B_TRUE; while (is_extension_header) { /* * There must be at least enough data left to read the * next header and header length fields from the next * header. */ if (*fraglen < 2) { return (extmask); } switch (proto) { case IPPROTO_HOPOPTS: ipv6ext_hbh = (struct ip6_hbh *)data_ptr; exthdrlen = 8 + ipv6ext_hbh->ip6h_len * 8; if (*fraglen <= exthdrlen) { return (extmask); } prt_hbh_options(flags, ipv6ext_hbh); extmask |= SNOOP_HOPOPTS; proto = ipv6ext_hbh->ip6h_nxt; break; case IPPROTO_DSTOPTS: ipv6ext_dest = (struct ip6_dest *)data_ptr; exthdrlen = 8 + ipv6ext_dest->ip6d_len * 8; if (*fraglen <= exthdrlen) { return (extmask); } prt_dest_options(flags, ipv6ext_dest); extmask |= SNOOP_DSTOPTS; proto = ipv6ext_dest->ip6d_nxt; break; case IPPROTO_ROUTING: ipv6ext_rthdr = (struct ip6_rthdr *)data_ptr; exthdrlen = 8 + ipv6ext_rthdr->ip6r_len * 8; if (*fraglen <= exthdrlen) { return (extmask); } prt_routing_hdr(flags, ipv6ext_rthdr); extmask |= SNOOP_ROUTING; proto = ipv6ext_rthdr->ip6r_nxt; break; case IPPROTO_FRAGMENT: /* LINTED: alignment */ ipv6ext_frag = (struct ip6_frag *)data_ptr; exthdrlen = sizeof (struct ip6_frag); if (*fraglen <= exthdrlen) { return (extmask); } prt_fragment_hdr(flags, ipv6ext_frag); extmask |= SNOOP_FRAGMENT; /* * If this is not the first fragment, forget about * the rest of the packet, snoop decoding is * stateless. */ if ((ipv6ext_frag->ip6f_offlg & IP6F_OFF_MASK) != 0) proto = IPPROTO_NONE; else proto = ipv6ext_frag->ip6f_nxt; break; default: is_extension_header = B_FALSE; break; } if (is_extension_header) { *iplen -= exthdrlen; *fraglen -= exthdrlen; data_ptr += exthdrlen; } } *next = proto; *hdr = data_ptr; return (extmask); } static void print_ipoptions(const uchar_t *opt, int optlen) { int len; int remain; char *line; const char *truncstr; if (optlen <= 0) { (void) snprintf(get_line(0, 0), get_line_remain(), "No options"); return; } (void) snprintf(get_line(0, 0), get_line_remain(), "Options: (%d bytes)", optlen); while (optlen > 0) { line = get_line(0, 0); remain = get_line_remain(); len = opt[1]; truncstr = len > optlen ? "?" : ""; switch (opt[0]) { case IPOPT_EOL: (void) strlcpy(line, " - End of option list", remain); return; case IPOPT_NOP: (void) strlcpy(line, " - No op", remain); len = 1; break; case IPOPT_RR: (void) snprintf(line, remain, " - Record route (%d bytes%s)", len, truncstr); print_route(opt); break; case IPOPT_TS: (void) snprintf(line, remain, " - Time stamp (%d bytes%s)", len, truncstr); break; case IPOPT_SECURITY: (void) snprintf(line, remain, " - RIPSO (%d bytes%s)", len, truncstr); print_ripso(opt); break; case IPOPT_COMSEC: (void) snprintf(line, remain, " - CIPSO (%d bytes%s)", len, truncstr); print_cipso(opt); break; case IPOPT_LSRR: (void) snprintf(line, remain, " - Loose source route (%d bytes%s)", len, truncstr); print_route(opt); break; case IPOPT_SATID: (void) snprintf(line, remain, " - SATNET Stream id (%d bytes%s)", len, truncstr); break; case IPOPT_SSRR: (void) snprintf(line, remain, " - Strict source route, (%d bytes%s)", len, truncstr); print_route(opt); break; default: (void) snprintf(line, remain, " - Option %d (unknown - %d bytes%s) %s", opt[0], len, truncstr, tohex((char *)&opt[2], len - 2)); break; } if (len <= 0) { (void) snprintf(line, remain, " - Incomplete option len %d", len); break; } opt += len; optlen -= len; } } static void print_route(const uchar_t *opt) { int len, pointer, remain; struct in_addr addr; char *line; len = opt[1]; pointer = opt[2]; (void) snprintf(get_line(0, 0), get_line_remain(), " Pointer = %d", pointer); pointer -= IPOPT_MINOFF; opt += (IPOPT_OFFSET + 1); len -= (IPOPT_OFFSET + 1); while (len > 0) { line = get_line(0, 0); remain = get_line_remain(); memcpy((char *)&addr, opt, sizeof (addr)); if (addr.s_addr == INADDR_ANY) (void) strlcpy(line, " -", remain); else (void) snprintf(line, remain, " %s", addrtoname(AF_INET, &addr)); if (pointer == 0) (void) strlcat(line, " <-- (current)", remain); opt += sizeof (addr); len -= sizeof (addr); pointer -= sizeof (addr); } } char * getproto(int p) { switch (p) { case IPPROTO_HOPOPTS: return ("IPv6-HopOpts"); case IPPROTO_IPV6: return ("IPv6"); case IPPROTO_ROUTING: return ("IPv6-Route"); case IPPROTO_FRAGMENT: return ("IPv6-Frag"); case IPPROTO_RSVP: return ("RSVP"); case IPPROTO_ENCAP: return ("IP-in-IP"); case IPPROTO_AH: return ("AH"); case IPPROTO_ESP: return ("ESP"); case IPPROTO_ICMP: return ("ICMP"); case IPPROTO_ICMPV6: return ("ICMPv6"); case IPPROTO_DSTOPTS: return ("IPv6-DstOpts"); case IPPROTO_IGMP: return ("IGMP"); case IPPROTO_GGP: return ("GGP"); case IPPROTO_TCP: return ("TCP"); case IPPROTO_EGP: return ("EGP"); case IPPROTO_PUP: return ("PUP"); case IPPROTO_UDP: return ("UDP"); case IPPROTO_IDP: return ("IDP"); case IPPROTO_HELLO: return ("HELLO"); case IPPROTO_ND: return ("ND"); case IPPROTO_EON: return ("EON"); case IPPROTO_RAW: return ("RAW"); case IPPROTO_OSPF: return ("OSPF"); default: return (""); } } static void prt_routing_hdr(int flags, const struct ip6_rthdr *ipv6ext_rthdr) { uint8_t nxt_hdr; uint8_t type; uint32_t len; uint8_t segleft; uint32_t numaddrs; int i; struct ip6_rthdr0 *ipv6ext_rthdr0; struct in6_addr *addrs; char addr[INET6_ADDRSTRLEN]; /* in summary mode, we don't do anything. */ if (flags & F_SUM) { return; } nxt_hdr = ipv6ext_rthdr->ip6r_nxt; type = ipv6ext_rthdr->ip6r_type; len = 8 * (ipv6ext_rthdr->ip6r_len + 1); segleft = ipv6ext_rthdr->ip6r_segleft; show_header("IPv6-Route: ", "IPv6 Routing Header", 0); show_space(); (void) snprintf(get_line(0, 0), get_line_remain(), "Next header = %d (%s)", nxt_hdr, getproto(nxt_hdr)); (void) snprintf(get_line(0, 0), get_line_remain(), "Header length = %d", len); (void) snprintf(get_line(0, 0), get_line_remain(), "Routing type = %d", type); (void) snprintf(get_line(0, 0), get_line_remain(), "Segments left = %d", segleft); if (type == IPV6_RTHDR_TYPE_0) { /* * XXX This loop will print all addresses in the routing header, * XXX not just the segments left. * XXX (The header length field is twice the number of * XXX addresses) * XXX At some future time, we may want to change this * XXX to differentiate between the hops yet to do * XXX and the hops already taken. */ /* LINTED: alignment */ ipv6ext_rthdr0 = (struct ip6_rthdr0 *)ipv6ext_rthdr; numaddrs = ipv6ext_rthdr0->ip6r0_len / 2; addrs = (struct in6_addr *)(ipv6ext_rthdr0 + 1); for (i = 0; i < numaddrs; i++) { (void) inet_ntop(AF_INET6, &addrs[i], addr, INET6_ADDRSTRLEN); (void) snprintf(get_line(0, 0), get_line_remain(), "address[%d]=%s", i, addr); } } show_space(); } static void prt_fragment_hdr(int flags, const struct ip6_frag *ipv6ext_frag) { boolean_t morefrag; uint16_t fragoffset; uint8_t nxt_hdr; uint32_t fragident; /* extract the various fields from the fragment header */ nxt_hdr = ipv6ext_frag->ip6f_nxt; morefrag = (ipv6ext_frag->ip6f_offlg & IP6F_MORE_FRAG) == 0 ? B_FALSE : B_TRUE; fragoffset = ntohs(ipv6ext_frag->ip6f_offlg & IP6F_OFF_MASK); fragident = ntohl(ipv6ext_frag->ip6f_ident); if (flags & F_SUM) { (void) snprintf(get_sum_line(), MAXLINE, "IPv6 fragment ID=%u Offset=%-4d MF=%d", fragident, fragoffset, morefrag); } else { /* F_DTAIL */ show_header("IPv6-Frag: ", "IPv6 Fragment Header", 0); show_space(); (void) snprintf(get_line(0, 0), get_line_remain(), "Next Header = %d (%s)", nxt_hdr, getproto(nxt_hdr)); (void) snprintf(get_line(0, 0), get_line_remain(), "Fragment Offset = %d", fragoffset); (void) snprintf(get_line(0, 0), get_line_remain(), "More Fragments Flag = %s", morefrag ? "true" : "false"); (void) snprintf(get_line(0, 0), get_line_remain(), "Identification = %u", fragident); show_space(); } } static void print_ip6opt_ls(const uchar_t *data, unsigned int op_len) { uint32_t doi; uint8_t sotype, solen; uint16_t value, value2; char *cp; int remlen; boolean_t printed; (void) snprintf(get_line(0, 0), get_line_remain(), "Labeled Security Option len = %u bytes%s", op_len, op_len < sizeof (uint32_t) || (op_len & 1) != 0 ? "?" : ""); if (op_len < sizeof (uint32_t)) return; GETINT32(doi, data); (void) snprintf(get_line(0, 0), get_line_remain(), " DOI = %d (%s)", doi, doi == IP6LS_DOI_V4 ? "IPv4" : "???"); op_len -= sizeof (uint32_t); while (op_len > 0) { GETINT8(sotype, data); if (op_len < 2) { (void) snprintf(get_line(0, 0), get_line_remain(), " truncated %u suboption (no len)", sotype); break; } GETINT8(solen, data); if (solen < 2 || solen > op_len) { (void) snprintf(get_line(0, 0), get_line_remain(), " bad %u suboption (len 2 <= %u <= %u)", sotype, solen, op_len); if (solen < 2) solen = 2; if (solen > op_len) solen = op_len; } op_len -= solen; solen -= 2; cp = get_line(0, 0); remlen = get_line_remain(); (void) strlcpy(cp, " ", remlen); cp += 4; remlen -= 4; printed = B_TRUE; switch (sotype) { case IP6LS_TT_LEVEL: if (solen != 2) { printed = B_FALSE; break; } GETINT16(value, data); (void) snprintf(cp, remlen, "Level %u", value); solen = 0; break; case IP6LS_TT_VECTOR: (void) strlcpy(cp, "Bit-Vector: ", remlen); remlen -= strlen(cp); cp += strlen(cp); while (solen > 1) { GETINT16(value, data); solen -= 2; (void) snprintf(cp, remlen, "%04x", value); remlen -= strlen(cp); cp += strlen(cp); } break; case IP6LS_TT_ENUM: (void) strlcpy(cp, "Enumeration:", remlen); remlen -= strlen(cp); cp += strlen(cp); while (solen > 1) { GETINT16(value, data); solen -= 2; (void) snprintf(cp, remlen, " %u", value); remlen -= strlen(cp); cp += strlen(cp); } break; case IP6LS_TT_RANGES: (void) strlcpy(cp, "Ranges:", remlen); remlen -= strlen(cp); cp += strlen(cp); while (solen > 3) { GETINT16(value, data); GETINT16(value2, data); solen -= 4; (void) snprintf(cp, remlen, " %u-%u", value, value2); remlen -= strlen(cp); cp += strlen(cp); } break; case IP6LS_TT_V4: (void) strlcpy(cp, "IPv4 Option", remlen); print_ipoptions(data, solen); solen = 0; break; case IP6LS_TT_DEST: (void) snprintf(cp, remlen, "Destination-Only Data length %u", solen); solen = 0; break; default: (void) snprintf(cp, remlen, " unknown %u suboption (len %u)", sotype, solen); solen = 0; break; } if (solen != 0) { if (printed) { cp = get_line(0, 0); remlen = get_line_remain(); } (void) snprintf(cp, remlen, " malformed %u suboption (remaining %u)", sotype, solen); data += solen; } } } static void prt_hbh_options(int flags, const struct ip6_hbh *ipv6ext_hbh) { const uint8_t *data, *ndata; uint32_t len; uint8_t op_type; uint8_t op_len; uint8_t nxt_hdr; /* in summary mode, we don't do anything. */ if (flags & F_SUM) { return; } show_header("IPv6-HopOpts: ", "IPv6 Hop-by-Hop Options Header", 0); show_space(); /* * Store the lengh of this ext hdr in bytes. The caller has * ensured that there is at least len bytes of data left. */ len = ipv6ext_hbh->ip6h_len * 8 + 8; ndata = (const uint8_t *)ipv6ext_hbh + 2; len -= 2; nxt_hdr = ipv6ext_hbh->ip6h_nxt; (void) snprintf(get_line(0, 0), get_line_remain(), "Next Header = %u (%s)", nxt_hdr, getproto(nxt_hdr)); while (len > 0) { data = ndata; GETINT8(op_type, data); /* This is the only one-octet IPv6 option */ if (op_type == IP6OPT_PAD1) { (void) snprintf(get_line(0, 0), get_line_remain(), "pad1 option "); len--; ndata = data; continue; } GETINT8(op_len, data); if (len < 2 || op_len + 2 > len) { (void) snprintf(get_line(0, 0), get_line_remain(), "Error: option %u truncated (%u + 2 > %u)", op_type, op_len, len); op_len = len - 2; /* * Continue processing the malformed option so that we * can display as much as possible. */ } /* advance pointers to the next option */ len -= op_len + 2; ndata = data + op_len; /* process this option */ switch (op_type) { case IP6OPT_PADN: (void) snprintf(get_line(0, 0), get_line_remain(), "padN option len = %u", op_len); break; case IP6OPT_JUMBO: { uint32_t payload_len; (void) snprintf(get_line(0, 0), get_line_remain(), "Jumbo Payload Option len = %u bytes%s", op_len, op_len == sizeof (uint32_t) ? "" : "?"); if (op_len == sizeof (uint32_t)) { GETINT32(payload_len, data); (void) snprintf(get_line(0, 0), get_line_remain(), "Jumbo Payload Length = %u bytes", payload_len); } break; } case IP6OPT_ROUTER_ALERT: { uint16_t value; const char *label[] = {"MLD", "RSVP", "AN"}; (void) snprintf(get_line(0, 0), get_line_remain(), "Router Alert Option len = %u bytes%s", op_len, op_len == sizeof (uint16_t) ? "" : "?"); if (op_len == sizeof (uint16_t)) { GETINT16(value, data); (void) snprintf(get_line(0, 0), get_line_remain(), "Alert Type = %d (%s)", value, value < sizeof (label) / sizeof (label[0]) ? label[value] : "???"); } break; } case IP6OPT_LS: print_ip6opt_ls(data, op_len); break; default: (void) snprintf(get_line(0, 0), get_line_remain(), "Option type = %u, len = %u", op_type, op_len); break; } } show_space(); } static void prt_dest_options(int flags, const struct ip6_dest *ipv6ext_dest) { const uint8_t *data, *ndata; uint32_t len; uint8_t op_type; uint32_t op_len; uint8_t nxt_hdr; uint8_t value; /* in summary mode, we don't do anything. */ if (flags & F_SUM) { return; } show_header("IPv6-DstOpts: ", "IPv6 Destination Options Header", 0); show_space(); /* * Store the length of this ext hdr in bytes. The caller has * ensured that there is at least len bytes of data left. */ len = ipv6ext_dest->ip6d_len * 8 + 8; ndata = (const uint8_t *)ipv6ext_dest + 2; /* skip hdr/len */ len -= 2; nxt_hdr = ipv6ext_dest->ip6d_nxt; (void) snprintf(get_line(0, 0), get_line_remain(), "Next Header = %u (%s)", nxt_hdr, getproto(nxt_hdr)); while (len > 0) { data = ndata; GETINT8(op_type, data); if (op_type == IP6OPT_PAD1) { (void) snprintf(get_line(0, 0), get_line_remain(), "pad1 option "); len--; ndata = data; continue; } GETINT8(op_len, data); if (len < 2 || op_len + 2 > len) { (void) snprintf(get_line(0, 0), get_line_remain(), "Error: option %u truncated (%u + 2 > %u)", op_type, op_len, len); op_len = len - 2; /* * Continue processing the malformed option so that we * can display as much as possible. */ } /* advance pointers to the next option */ len -= op_len + 2; ndata = data + op_len; /* process this option */ switch (op_type) { case IP6OPT_PADN: (void) snprintf(get_line(0, 0), get_line_remain(), "padN option len = %u", op_len); break; case IP6OPT_TUNNEL_LIMIT: GETINT8(value, data); (void) snprintf(get_line(0, 0), get_line_remain(), "tunnel encapsulation limit len = %d, value = %d", op_len, value); break; case IP6OPT_LS: print_ip6opt_ls(data, op_len); break; default: (void) snprintf(get_line(0, 0), get_line_remain(), "Option type = %u, len = %u", op_type, op_len); break; } } show_space(); } #define ALABEL_MAXLEN 256 static char ascii_label[ALABEL_MAXLEN]; static char *plabel = ascii_label; struct snoop_pair { int val; const char *name; }; static struct snoop_pair ripso_class_tbl[] = { TSOL_CL_TOP_SECRET, "TOP SECRET", TSOL_CL_SECRET, "SECRET", TSOL_CL_CONFIDENTIAL, "CONFIDENTIAL", TSOL_CL_UNCLASSIFIED, "UNCLASSIFIED", -1, NULL }; static struct snoop_pair ripso_prot_tbl[] = { TSOL_PA_GENSER, "GENSER", TSOL_PA_SIOP_ESI, "SIOP-ESI", TSOL_PA_SCI, "SCI", TSOL_PA_NSA, "NSA", TSOL_PA_DOE, "DOE", 0x04, "UNASSIGNED", 0x02, "UNASSIGNED", -1, NULL }; static struct snoop_pair * get_pair_byval(struct snoop_pair pairlist[], int val) { int i; for (i = 0; pairlist[i].name != NULL; i++) if (pairlist[i].val == val) return (&pairlist[i]); return (NULL); } static void print_ripso(const uchar_t *opt) { struct snoop_pair *ripso_class; int i, index, prot_len; boolean_t first_prot; char line[100], *ptr; prot_len = opt[1] - 3; if (prot_len < 0) return; show_header("RIPSO: ", "Revised IP Security Option", 0); show_space(); (void) snprintf(get_line(0, 0), get_line_remain(), "Type = Basic Security Option (%d), Length = %d", opt[0], opt[1]); /* * Display Classification Level */ ripso_class = get_pair_byval(ripso_class_tbl, (int)opt[2]); if (ripso_class != NULL) (void) snprintf(get_line(0, 0), get_line_remain(), "Classification = Unknown (0x%02x)", opt[2]); else (void) snprintf(get_line(0, 0), get_line_remain(), "Classification = %s (0x%02x)", ripso_class->name, ripso_class->val); /* * Display Protection Authority Flags */ (void) snprintf(line, sizeof (line), "Protection Authority = "); ptr = line; first_prot = B_TRUE; for (i = 0; i < prot_len; i++) { index = 0; while (ripso_prot_tbl[index].name != NULL) { if (opt[3 + i] & ripso_prot_tbl[index].val) { ptr = strchr(ptr, 0); if (!first_prot) { (void) strlcpy(ptr, ", ", sizeof (line) - (ptr - line)); ptr = strchr(ptr, 0); } (void) snprintf(ptr, sizeof (line) - (ptr - line), "%s (0x%02x)", ripso_prot_tbl[index].name, ripso_prot_tbl[index].val); } index++; } if ((opt[3 + i] & 1) == 0) break; } if (!first_prot) (void) snprintf(get_line(0, 0), get_line_remain(), "%s", line); else (void) snprintf(get_line(0, 0), get_line_remain(), "%sNone", line); } #define CIPSO_GENERIC_ARRAY_LEN 200 /* * Return 1 if CIPSO SL and Categories are all 1's; 0 otherwise. * * Note: opt starts with "Tag Type": * * |tag_type(1)|tag_length(1)|align(1)|sl(1)|categories(variable)| * */ static boolean_t cipso_high(const uchar_t *opt) { int i; if (((int)opt[1] + 6) < IP_MAX_OPT_LENGTH) return (B_FALSE); for (i = 0; i < ((int)opt[1] - 3); i++) if (opt[3 + i] != 0xff) return (B_FALSE); return (B_TRUE); } /* * Converts CIPSO label to SL. * * Note: opt starts with "Tag Type": * * |tag_type(1)|tag_length(1)|align(1)|sl(1)|categories(variable)| * */ static void cipso2sl(const uchar_t *opt, bslabel_t *sl, int *high) { int i, taglen; uchar_t *q = (uchar_t *)&((_bslabel_impl_t *)sl)->compartments; *high = 0; taglen = opt[1]; memset((caddr_t)sl, 0, sizeof (bslabel_t)); if (cipso_high(opt)) { BSLHIGH(sl); *high = 1; } else { LCLASS_SET((_bslabel_impl_t *)sl, opt[3]); for (i = 0; i < taglen - TSOL_TT1_MIN_LENGTH; i++) q[i] = opt[TSOL_TT1_MIN_LENGTH + i]; } SETBLTYPE(sl, SUN_SL_ID); } static int interpret_cipso_tagtype1(const uchar_t *opt) { int i, taglen, ishigh; bslabel_t sl; char line[CIPSO_GENERIC_ARRAY_LEN], *ptr; taglen = opt[1]; if (taglen < TSOL_TT1_MIN_LENGTH || taglen > TSOL_TT1_MAX_LENGTH) return (taglen); (void) snprintf(get_line(0, 0), get_line_remain(), "Tag Type = %d, Tag Length = %d", opt[0], opt[1]); (void) snprintf(get_line(0, 0), get_line_remain(), "Sensitivity Level = 0x%02x", opt[3]); ptr = line; for (i = 0; i < taglen - TSOL_TT1_MIN_LENGTH; i++) { (void) snprintf(ptr, sizeof (line) - (ptr - line), "%02x", opt[TSOL_TT1_MIN_LENGTH + i]); ptr = strchr(ptr, 0); } if (i != 0) { (void) snprintf(get_line(0, 0), get_line_remain(), "Categories = "); (void) snprintf(get_line(0, 0), get_line_remain(), "\t%s", line); } else { (void) snprintf(get_line(0, 0), get_line_remain(), "Categories = None"); } cipso2sl(opt, &sl, &ishigh); if (is_system_labeled()) { if (bsltos(&sl, &plabel, ALABEL_MAXLEN, LONG_CLASSIFICATION|LONG_WORDS|VIEW_INTERNAL) < 0) { (void) snprintf(get_line(0, 0), get_line_remain(), "The Sensitivity Level and Categories can't be " "mapped to a valid SL"); } else { (void) snprintf(get_line(0, 0), get_line_remain(), "The Sensitivity Level and Categories are mapped " "to the SL:"); (void) snprintf(get_line(0, 0), get_line_remain(), "\t%s", ascii_label); } } return (taglen); } /* * The following struct definition #define's are copied from TS1.x. They are * not used here (except TTYPE_3_MAX_TOKENS), but included as a reference for * the tag type 3 packet format. */ #define TTYPE_3_MAX_TOKENS 7 /* * Display CIPSO tag type 3 which is defined by MAXSIX. */ static int interpret_cipso_tagtype3(const uchar_t *opt) { uchar_t tagtype; int index, numtokens, taglen; uint16_t mask; uint32_t token; static const char *name[] = { "SL", "NCAV", "INTEG", "SID", "undefined", "undefined", "IL", "PRIVS", "LUID", "PID", "IDS", "ACL" }; tagtype = *opt++; (void) memcpy(&mask, opt + 3, sizeof (mask)); (void) snprintf(get_line(0, 0), get_line_remain(), "Tag Type = %d (MAXSIX)", tagtype); (void) snprintf(get_line(0, 0), get_line_remain(), "Generation = 0x%02x%02x%02x, Mask = 0x%04x", opt[0], opt[1], opt[2], mask); opt += 3 + sizeof (mask); /* * Display tokens */ numtokens = 0; index = 0; while (mask != 0 && numtokens < TTYPE_3_MAX_TOKENS) { if (mask & 0x0001) { (void) memcpy(&token, opt, sizeof (token)); opt += sizeof (token); (void) snprintf(get_line(0, 0), get_line_remain(), "Attribute = %s, Token = 0x%08x", index < sizeof (name) / sizeof (*name) ? name[index] : "unknown", token); numtokens++; } mask = mask >> 1; index++; } taglen = 6 + numtokens * 4; return (taglen); } static void print_cipso(const uchar_t *opt) { int optlen, taglen, tagnum; uint32_t doi; char line[CIPSO_GENERIC_ARRAY_LEN]; char *oldnest; optlen = opt[1]; if (optlen < TSOL_CIPSO_MIN_LENGTH || optlen > TSOL_CIPSO_MAX_LENGTH) return; oldnest = prot_nest_prefix; prot_nest_prefix = prot_prefix; show_header("CIPSO: ", "Common IP Security Option", 0); show_space(); /* * Display CIPSO Header */ (void) snprintf(get_line(0, 0), get_line_remain(), "Type = CIPSO (%d), Length = %d", opt[0], opt[1]); (void) memcpy(&doi, opt + 2, sizeof (doi)); (void) snprintf(get_line(0, 0), get_line_remain(), "Domain of Interpretation = %u", (unsigned)ntohl(doi)); if (opt[1] == TSOL_CIPSO_MIN_LENGTH) { /* no tags */ show_space(); prot_prefix = prot_nest_prefix; prot_nest_prefix = oldnest; return; } optlen -= TSOL_CIPSO_MIN_LENGTH; opt += TSOL_CIPSO_MIN_LENGTH; /* * Display Each Tag */ tagnum = 1; while (optlen >= TSOL_TT1_MIN_LENGTH) { (void) snprintf(line, sizeof (line), "Tag# %d", tagnum); show_header("CIPSO: ", line, 0); /* * We handle tag type 1 and 3 only. Note, tag type 3 * is MAXSIX defined. */ switch (opt[0]) { case 1: taglen = interpret_cipso_tagtype1(opt); break; case 3: taglen = interpret_cipso_tagtype3(opt); break; default: (void) snprintf(get_line(0, 0), get_line_remain(), "Unknown Tag Type %d", opt[0]); show_space(); prot_prefix = prot_nest_prefix; prot_nest_prefix = oldnest; return; } /* * Move to the next tag */ if (taglen <= 0) break; optlen -= taglen; opt += taglen; tagnum++; } show_space(); prot_prefix = prot_nest_prefix; prot_nest_prefix = oldnest; }