/* * 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 (c) 1995, 2010, Oracle and/or its affiliates. All rights reserved. */ #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 #include #include #include #include #define _SUN_TPI_VERSION 2 #include #include #include #include int so_default_version = SOV_SOCKSTREAM; #ifdef DEBUG /* Set sockdebug to print debug messages when SO_DEBUG is set */ int sockdebug = 0; /* Set sockprinterr to print error messages when SO_DEBUG is set */ int sockprinterr = 0; /* * Set so_default_options to SO_DEBUG is all sockets should be created * with SO_DEBUG set. This is needed to get debug printouts from the * socket() call itself. */ int so_default_options = 0; #endif /* DEBUG */ #ifdef SOCK_TEST /* * Set to number of ticks to limit cv_waits for code coverage testing. * Set to 1000 when SO_DEBUG is set to 2. */ clock_t sock_test_timelimit = 0; #endif /* SOCK_TEST */ /* * For concurrency testing of e.g. opening /dev/ip which does not * handle T_INFO_REQ messages. */ int so_no_tinfo = 0; /* * Timeout for getting a T_CAPABILITY_ACK - it is possible for a provider * to simply ignore the T_CAPABILITY_REQ. */ clock_t sock_capability_timeout = 2; /* seconds */ static int do_tcapability(struct sonode *so, t_uscalar_t cap_bits1); static void so_removehooks(struct sonode *so); static mblk_t *strsock_proto(vnode_t *vp, mblk_t *mp, strwakeup_t *wakeups, strsigset_t *firstmsgsigs, strsigset_t *allmsgsigs, strpollset_t *pollwakeups); static mblk_t *strsock_misc(vnode_t *vp, mblk_t *mp, strwakeup_t *wakeups, strsigset_t *firstmsgsigs, strsigset_t *allmsgsigs, strpollset_t *pollwakeups); /* * Convert a socket to a stream. Invoked when the illusory sockmod * is popped from the stream. * Change the stream head back to default operation without losing * any messages (T_conn_ind's are moved to the stream head queue). */ int so_sock2stream(struct sonode *so) { struct vnode *vp = SOTOV(so); queue_t *rq; mblk_t *mp; int error = 0; sotpi_info_t *sti = SOTOTPI(so); ASSERT(MUTEX_HELD(&sti->sti_plumb_lock)); mutex_enter(&so->so_lock); so_lock_single(so); ASSERT(so->so_version != SOV_STREAM); if (sti->sti_direct) { mblk_t **mpp; int rval; /* * Tell the transport below that sockmod is being popped */ mutex_exit(&so->so_lock); error = strioctl(vp, _SIOCSOCKFALLBACK, 0, 0, K_TO_K, CRED(), &rval); mutex_enter(&so->so_lock); if (error != 0) { dprintso(so, 0, ("so_sock2stream(%p): " "_SIOCSOCKFALLBACK failed\n", (void *)so)); goto exit; } sti->sti_direct = 0; for (mpp = &sti->sti_conn_ind_head; (mp = *mpp) != NULL; mpp = &mp->b_next) { struct T_conn_ind *conn_ind; /* * strsock_proto() has already verified the length of * this message block. */ ASSERT(MBLKL(mp) >= sizeof (struct T_conn_ind)); conn_ind = (struct T_conn_ind *)mp->b_rptr; if (conn_ind->OPT_length == 0 && conn_ind->OPT_offset == 0) continue; if (DB_REF(mp) > 1) { mblk_t *newmp; size_t length; cred_t *cr; pid_t cpid; int error; /* Dummy - error not returned */ /* * Copy the message block because it is used * elsewhere, too. * Can't use copyb since we want to wait * yet allow for EINTR. */ /* Round up size for reuse */ length = MAX(MBLKL(mp), 64); cr = msg_getcred(mp, &cpid); if (cr != NULL) { newmp = allocb_cred_wait(length, 0, &error, cr, cpid); } else { newmp = allocb_wait(length, 0, 0, &error); } if (newmp == NULL) { error = EINTR; goto exit; } bcopy(mp->b_rptr, newmp->b_wptr, length); newmp->b_wptr += length; newmp->b_next = mp->b_next; /* * Link the new message block into the queue * and free the old one. */ *mpp = newmp; mp->b_next = NULL; freemsg(mp); mp = newmp; conn_ind = (struct T_conn_ind *)mp->b_rptr; } /* * Remove options added by TCP for accept fast-path. */ conn_ind->OPT_length = 0; conn_ind->OPT_offset = 0; } } so->so_version = SOV_STREAM; so->so_proto_handle = NULL; /* * Remove the hooks in the stream head to avoid queuing more * packets in sockfs. */ mutex_exit(&so->so_lock); so_removehooks(so); mutex_enter(&so->so_lock); /* * Clear any state related to urgent data. Leave any T_EXDATA_IND * on the queue - the behavior of urgent data after a switch is * left undefined. */ so->so_error = sti->sti_delayed_error = 0; freemsg(so->so_oobmsg); so->so_oobmsg = NULL; sti->sti_oobsigcnt = sti->sti_oobcnt = 0; so->so_state &= ~(SS_RCVATMARK|SS_OOBPEND|SS_HAVEOOBDATA|SS_HADOOBDATA| SS_SAVEDEOR); ASSERT(so_verify_oobstate(so)); freemsg(sti->sti_ack_mp); sti->sti_ack_mp = NULL; /* * Flush the T_DISCON_IND on sti_discon_ind_mp. */ so_flush_discon_ind(so); /* * Move any queued T_CONN_IND messages to stream head queue. */ rq = RD(strvp2wq(vp)); while ((mp = sti->sti_conn_ind_head) != NULL) { sti->sti_conn_ind_head = mp->b_next; mp->b_next = NULL; if (sti->sti_conn_ind_head == NULL) { ASSERT(sti->sti_conn_ind_tail == mp); sti->sti_conn_ind_tail = NULL; } dprintso(so, 0, ("so_sock2stream(%p): moving T_CONN_IND\n", (void *)so)); /* Drop lock across put() */ mutex_exit(&so->so_lock); put(rq, mp); mutex_enter(&so->so_lock); } exit: ASSERT(MUTEX_HELD(&so->so_lock)); so_unlock_single(so, SOLOCKED); mutex_exit(&so->so_lock); return (error); } /* * Covert a stream back to a socket. This is invoked when the illusory * sockmod is pushed on a stream (where the stream was "created" by * popping the illusory sockmod). * This routine can not recreate the socket state (certain aspects of * it like urgent data state and the bound/connected addresses for AF_UNIX * sockets can not be recreated by asking the transport for information). * Thus this routine implicitly assumes that the socket is in an initial * state (as if it was just created). It flushes any messages queued on the * read queue to avoid dealing with e.g. TPI acks or T_exdata_ind messages. */ void so_stream2sock(struct sonode *so) { struct vnode *vp = SOTOV(so); sotpi_info_t *sti = SOTOTPI(so); ASSERT(MUTEX_HELD(&sti->sti_plumb_lock)); mutex_enter(&so->so_lock); so_lock_single(so); ASSERT(so->so_version == SOV_STREAM); so->so_version = SOV_SOCKSTREAM; sti->sti_pushcnt = 0; mutex_exit(&so->so_lock); /* * Set a permenent error to force any thread in sorecvmsg to * return (and drop SOREADLOCKED). Clear the error once * we have SOREADLOCKED. * This makes a read sleeping during the I_PUSH of sockmod return * EIO. */ strsetrerror(SOTOV(so), EIO, 1, NULL); /* * Get the read lock before flushing data to avoid * problems with the T_EXDATA_IND MSG_PEEK code in sorecvmsg. */ mutex_enter(&so->so_lock); (void) so_lock_read(so, 0); /* Set SOREADLOCKED */ mutex_exit(&so->so_lock); strsetrerror(SOTOV(so), 0, 0, NULL); so_installhooks(so); /* * Flush everything on the read queue. * This ensures that no T_CONN_IND remain and that no T_EXDATA_IND * remain; those types of messages would confuse sockfs. */ strflushrq(vp, FLUSHALL); mutex_enter(&so->so_lock); /* * Flush the T_DISCON_IND on sti_discon_ind_mp. */ so_flush_discon_ind(so); so_unlock_read(so); /* Clear SOREADLOCKED */ so_unlock_single(so, SOLOCKED); mutex_exit(&so->so_lock); } /* * Install the hooks in the stream head. */ void so_installhooks(struct sonode *so) { struct vnode *vp = SOTOV(so); strsetrputhooks(vp, SH_SIGALLDATA | SH_IGN_ZEROLEN | SH_CONSOL_DATA, strsock_proto, strsock_misc); strsetwputhooks(vp, SH_SIGPIPE | SH_RECHECK_ERR, 0); } /* * Remove the hooks in the stream head. */ static void so_removehooks(struct sonode *so) { struct vnode *vp = SOTOV(so); strsetrputhooks(vp, 0, NULL, NULL); strsetwputhooks(vp, 0, STRTIMOUT); /* * Leave read behavior as it would have been for a normal * stream i.e. a read of an M_PROTO will fail. */ } void so_basic_strinit(struct sonode *so) { struct vnode *vp = SOTOV(so); struct stdata *stp; mblk_t *mp; sotpi_info_t *sti = SOTOTPI(so); /* Preallocate an unbind_req message */ mp = soallocproto(sizeof (struct T_unbind_req), _ALLOC_SLEEP, CRED()); mutex_enter(&so->so_lock); sti->sti_unbind_mp = mp; #ifdef DEBUG so->so_options = so_default_options; #endif /* DEBUG */ mutex_exit(&so->so_lock); so_installhooks(so); stp = vp->v_stream; /* * Have to keep minpsz at zero in order to allow write/send of zero * bytes. */ mutex_enter(&stp->sd_lock); if (stp->sd_qn_minpsz == 1) stp->sd_qn_minpsz = 0; mutex_exit(&stp->sd_lock); } /* * Initialize the streams side of a socket including * T_info_req/ack processing. If tso is not NULL its values are used thereby * avoiding the T_INFO_REQ. */ int so_strinit(struct sonode *so, struct sonode *tso) { sotpi_info_t *sti = SOTOTPI(so); sotpi_info_t *tsti; int error; so_basic_strinit(so); /* * The T_CAPABILITY_REQ should be the first message sent down because * at least TCP has a fast-path for this which avoids timeouts while * waiting for the T_CAPABILITY_ACK under high system load. */ if (tso == NULL) { error = do_tcapability(so, TC1_ACCEPTOR_ID | TC1_INFO); if (error) return (error); } else { tsti = SOTOTPI(tso); mutex_enter(&so->so_lock); sti->sti_tsdu_size = tsti->sti_tsdu_size; sti->sti_etsdu_size = tsti->sti_etsdu_size; sti->sti_addr_size = tsti->sti_addr_size; sti->sti_opt_size = tsti->sti_opt_size; sti->sti_tidu_size = tsti->sti_tidu_size; sti->sti_serv_type = tsti->sti_serv_type; so->so_mode = tso->so_mode & ~SM_ACCEPTOR_ID; mutex_exit(&so->so_lock); /* the following do_tcapability may update so->so_mode */ if ((tsti->sti_serv_type != T_CLTS) && (sti->sti_direct == 0)) { error = do_tcapability(so, TC1_ACCEPTOR_ID); if (error) return (error); } } /* * If the addr_size is 0 we treat it as already bound * and connected. This is used by the routing socket. * We set the addr_size to something to allocate a the address * structures. */ if (sti->sti_addr_size == 0) { so->so_state |= SS_ISBOUND | SS_ISCONNECTED; /* Address size can vary with address families. */ if (so->so_family == AF_INET6) sti->sti_addr_size = (t_scalar_t)sizeof (struct sockaddr_in6); else sti->sti_addr_size = (t_scalar_t)sizeof (struct sockaddr_in); ASSERT(sti->sti_unbind_mp); } so_alloc_addr(so, sti->sti_addr_size); return (0); } static void copy_tinfo(struct sonode *so, struct T_info_ack *tia) { sotpi_info_t *sti = SOTOTPI(so); sti->sti_tsdu_size = tia->TSDU_size; sti->sti_etsdu_size = tia->ETSDU_size; sti->sti_addr_size = tia->ADDR_size; sti->sti_opt_size = tia->OPT_size; sti->sti_tidu_size = tia->TIDU_size; sti->sti_serv_type = tia->SERV_type; switch (tia->CURRENT_state) { case TS_UNBND: break; case TS_IDLE: so->so_state |= SS_ISBOUND; sti->sti_laddr_len = 0; sti->sti_laddr_valid = 0; break; case TS_DATA_XFER: so->so_state |= SS_ISBOUND|SS_ISCONNECTED; sti->sti_laddr_len = 0; sti->sti_faddr_len = 0; sti->sti_laddr_valid = 0; sti->sti_faddr_valid = 0; break; } /* * Heuristics for determining the socket mode flags * (SM_ATOMIC, SM_CONNREQUIRED, SM_ADDR, SM_FDPASSING, * and SM_EXDATA, SM_OPTDATA, and SM_BYTESTREAM) * from the info ack. */ if (sti->sti_serv_type == T_CLTS) { so->so_mode |= SM_ATOMIC | SM_ADDR; } else { so->so_mode |= SM_CONNREQUIRED; if (sti->sti_etsdu_size != 0 && sti->sti_etsdu_size != -2) so->so_mode |= SM_EXDATA; } if (so->so_type == SOCK_SEQPACKET || so->so_type == SOCK_RAW) { /* Semantics are to discard tail end of messages */ so->so_mode |= SM_ATOMIC; } if (so->so_family == AF_UNIX) { so->so_mode |= SM_FDPASSING | SM_OPTDATA; if (sti->sti_addr_size == -1) { /* MAXPATHLEN + soun_family + nul termination */ sti->sti_addr_size = (t_scalar_t)(MAXPATHLEN + sizeof (short) + 1); } if (so->so_type == SOCK_STREAM) { /* * Make it into a byte-stream transport. * SOCK_SEQPACKET sockets are unchanged. */ sti->sti_tsdu_size = 0; } } else if (sti->sti_addr_size == -1) { /* * Logic extracted from sockmod - have to pick some max address * length in order to preallocate the addresses. */ sti->sti_addr_size = SOA_DEFSIZE; } if (sti->sti_tsdu_size == 0) so->so_mode |= SM_BYTESTREAM; } static int check_tinfo(struct sonode *so) { sotpi_info_t *sti = SOTOTPI(so); /* Consistency checks */ if (so->so_type == SOCK_DGRAM && sti->sti_serv_type != T_CLTS) { eprintso(so, ("service type and socket type mismatch\n")); eprintsoline(so, EPROTO); return (EPROTO); } if (so->so_type == SOCK_STREAM && sti->sti_serv_type == T_CLTS) { eprintso(so, ("service type and socket type mismatch\n")); eprintsoline(so, EPROTO); return (EPROTO); } if (so->so_type == SOCK_SEQPACKET && sti->sti_serv_type == T_CLTS) { eprintso(so, ("service type and socket type mismatch\n")); eprintsoline(so, EPROTO); return (EPROTO); } if (so->so_family == AF_INET && sti->sti_addr_size != (t_scalar_t)sizeof (struct sockaddr_in)) { eprintso(so, ("AF_INET must have sockaddr_in address length. Got %d\n", sti->sti_addr_size)); eprintsoline(so, EMSGSIZE); return (EMSGSIZE); } if (so->so_family == AF_INET6 && sti->sti_addr_size != (t_scalar_t)sizeof (struct sockaddr_in6)) { eprintso(so, ("AF_INET6 must have sockaddr_in6 address length. Got %d\n", sti->sti_addr_size)); eprintsoline(so, EMSGSIZE); return (EMSGSIZE); } dprintso(so, 1, ( "tinfo: serv %d tsdu %d, etsdu %d, addr %d, opt %d, tidu %d\n", sti->sti_serv_type, sti->sti_tsdu_size, sti->sti_etsdu_size, sti->sti_addr_size, sti->sti_opt_size, sti->sti_tidu_size)); dprintso(so, 1, ("tinfo: so_state %s\n", pr_state(so->so_state, so->so_mode))); return (0); } /* * Send down T_info_req and wait for the ack. * Record interesting T_info_ack values in the sonode. */ static int do_tinfo(struct sonode *so) { struct T_info_req tir; mblk_t *mp; int error; ASSERT(MUTEX_NOT_HELD(&so->so_lock)); if (so_no_tinfo) { SOTOTPI(so)->sti_addr_size = 0; return (0); } dprintso(so, 1, ("do_tinfo(%p)\n", (void *)so)); /* Send T_INFO_REQ */ tir.PRIM_type = T_INFO_REQ; mp = soallocproto1(&tir, sizeof (tir), sizeof (struct T_info_req) + sizeof (struct T_info_ack), _ALLOC_INTR, CRED()); if (mp == NULL) { eprintsoline(so, ENOBUFS); return (ENOBUFS); } /* T_INFO_REQ has to be M_PCPROTO */ DB_TYPE(mp) = M_PCPROTO; error = kstrputmsg(SOTOV(so), mp, NULL, 0, 0, MSG_BAND|MSG_HOLDSIG|MSG_IGNERROR, 0); if (error) { eprintsoline(so, error); return (error); } mutex_enter(&so->so_lock); /* Wait for T_INFO_ACK */ if ((error = sowaitprim(so, T_INFO_REQ, T_INFO_ACK, (t_uscalar_t)sizeof (struct T_info_ack), &mp, 0))) { mutex_exit(&so->so_lock); eprintsoline(so, error); return (error); } ASSERT(mp); copy_tinfo(so, (struct T_info_ack *)mp->b_rptr); mutex_exit(&so->so_lock); freemsg(mp); return (check_tinfo(so)); } /* * Send down T_capability_req and wait for the ack. * Record interesting T_capability_ack values in the sonode. */ static int do_tcapability(struct sonode *so, t_uscalar_t cap_bits1) { struct T_capability_req tcr; struct T_capability_ack *tca; mblk_t *mp; int error; sotpi_info_t *sti = SOTOTPI(so); ASSERT(cap_bits1 != 0); ASSERT((cap_bits1 & ~(TC1_ACCEPTOR_ID | TC1_INFO)) == 0); ASSERT(MUTEX_NOT_HELD(&so->so_lock)); if (sti->sti_provinfo->tpi_capability == PI_NO) return (do_tinfo(so)); if (so_no_tinfo) { sti->sti_addr_size = 0; if ((cap_bits1 &= ~TC1_INFO) == 0) return (0); } dprintso(so, 1, ("do_tcapability(%p)\n", (void *)so)); /* Send T_CAPABILITY_REQ */ tcr.PRIM_type = T_CAPABILITY_REQ; tcr.CAP_bits1 = cap_bits1; mp = soallocproto1(&tcr, sizeof (tcr), sizeof (struct T_capability_req) + sizeof (struct T_capability_ack), _ALLOC_INTR, CRED()); if (mp == NULL) { eprintsoline(so, ENOBUFS); return (ENOBUFS); } /* T_CAPABILITY_REQ should be M_PCPROTO here */ DB_TYPE(mp) = M_PCPROTO; error = kstrputmsg(SOTOV(so), mp, NULL, 0, 0, MSG_BAND|MSG_HOLDSIG|MSG_IGNERROR, 0); if (error) { eprintsoline(so, error); return (error); } mutex_enter(&so->so_lock); /* Wait for T_CAPABILITY_ACK */ if ((error = sowaitprim(so, T_CAPABILITY_REQ, T_CAPABILITY_ACK, (t_uscalar_t)sizeof (*tca), &mp, sock_capability_timeout * hz))) { mutex_exit(&so->so_lock); PI_PROVLOCK(sti->sti_provinfo); if (sti->sti_provinfo->tpi_capability == PI_DONTKNOW) sti->sti_provinfo->tpi_capability = PI_NO; PI_PROVUNLOCK(sti->sti_provinfo); ASSERT((so->so_mode & SM_ACCEPTOR_ID) == 0); if (cap_bits1 & TC1_INFO) { /* * If the T_CAPABILITY_REQ timed out and then a * T_INFO_REQ gets a protocol error, most likely * the capability was slow (vs. unsupported). Return * ENOSR for this case as a best guess. */ if (error == ETIME) { return ((error = do_tinfo(so)) == EPROTO ? ENOSR : error); } return (do_tinfo(so)); } return (0); } ASSERT(mp); tca = (struct T_capability_ack *)mp->b_rptr; ASSERT((cap_bits1 & TC1_INFO) == (tca->CAP_bits1 & TC1_INFO)); so_proc_tcapability_ack(so, tca); cap_bits1 = tca->CAP_bits1; mutex_exit(&so->so_lock); freemsg(mp); if (cap_bits1 & TC1_INFO) return (check_tinfo(so)); return (0); } /* * Process a T_CAPABILITY_ACK */ void so_proc_tcapability_ack(struct sonode *so, struct T_capability_ack *tca) { sotpi_info_t *sti = SOTOTPI(so); if (sti->sti_provinfo->tpi_capability == PI_DONTKNOW) { PI_PROVLOCK(sti->sti_provinfo); sti->sti_provinfo->tpi_capability = PI_YES; PI_PROVUNLOCK(sti->sti_provinfo); } if (tca->CAP_bits1 & TC1_ACCEPTOR_ID) { sti->sti_acceptor_id = tca->ACCEPTOR_id; so->so_mode |= SM_ACCEPTOR_ID; } if (tca->CAP_bits1 & TC1_INFO) copy_tinfo(so, &tca->INFO_ack); } /* * Retrieve socket error, clear error if not peek. */ int sogeterr(struct sonode *so, boolean_t clear_err) { int error; ASSERT(MUTEX_HELD(&so->so_lock)); error = so->so_error; if (clear_err) so->so_error = 0; return (error); } /* * This routine is registered with the stream head to retrieve read * side errors. * It does not clear the socket error for a peeking read side operation. * It the error is to be cleared it sets *clearerr. */ int sogetrderr(vnode_t *vp, int ispeek, int *clearerr) { struct sonode *so = VTOSO(vp); int error; mutex_enter(&so->so_lock); if (ispeek) { error = so->so_error; *clearerr = 0; } else { error = so->so_error; so->so_error = 0; *clearerr = 1; } mutex_exit(&so->so_lock); return (error); } /* * This routine is registered with the stream head to retrieve write * side errors. * It does not clear the socket error for a peeking read side operation. * It the error is to be cleared it sets *clearerr. */ int sogetwrerr(vnode_t *vp, int ispeek, int *clearerr) { struct sonode *so = VTOSO(vp); int error; mutex_enter(&so->so_lock); if (so->so_state & SS_CANTSENDMORE) { error = EPIPE; *clearerr = 0; } else { error = so->so_error; if (ispeek) { *clearerr = 0; } else { so->so_error = 0; *clearerr = 1; } } mutex_exit(&so->so_lock); return (error); } /* * Set a nonpersistent read and write error on the socket. * Used when there is a T_uderror_ind for a connected socket. * The caller also needs to call strsetrerror and strsetwerror * after dropping the lock. */ void soseterror(struct sonode *so, int error) { ASSERT(error != 0); ASSERT(MUTEX_HELD(&so->so_lock)); so->so_error = (ushort_t)error; } void soisconnecting(struct sonode *so) { ASSERT(MUTEX_HELD(&so->so_lock)); so->so_state &= ~(SS_ISCONNECTED|SS_ISDISCONNECTING); so->so_state |= SS_ISCONNECTING; cv_broadcast(&so->so_state_cv); } void soisconnected(struct sonode *so) { ASSERT(MUTEX_HELD(&so->so_lock)); so->so_state &= ~(SS_ISCONNECTING|SS_ISDISCONNECTING); so->so_state |= SS_ISCONNECTED; cv_broadcast(&so->so_state_cv); } /* * The caller also needs to call strsetrerror, strsetwerror and strseteof. */ void soisdisconnected(struct sonode *so, int error) { ASSERT(MUTEX_HELD(&so->so_lock)); so->so_state &= ~(SS_ISCONNECTING|SS_ISCONNECTED|SS_ISDISCONNECTING); so->so_state |= (SS_CANTRCVMORE|SS_CANTSENDMORE); so->so_error = (ushort_t)error; if (so->so_peercred != NULL) { crfree(so->so_peercred); so->so_peercred = NULL; } cv_broadcast(&so->so_state_cv); } /* * For connected AF_UNIX SOCK_DGRAM sockets when the peer closes. * Does not affect write side. * The caller also has to call strsetrerror. */ static void sobreakconn(struct sonode *so, int error) { ASSERT(MUTEX_HELD(&so->so_lock)); so->so_state &= ~(SS_ISCONNECTING|SS_ISCONNECTED|SS_ISDISCONNECTING); so->so_error = (ushort_t)error; cv_broadcast(&so->so_state_cv); } /* * Can no longer send. * Caller must also call strsetwerror. * * We mark the peer address as no longer valid for getpeername, but * leave it around for so_unix_close to notify the peer (that * transport has no addressing held at that layer). */ void socantsendmore(struct sonode *so) { ASSERT(MUTEX_HELD(&so->so_lock)); so->so_state |= SS_CANTSENDMORE; cv_broadcast(&so->so_state_cv); } /* * The caller must call strseteof(,1) as well as this routine * to change the socket state. */ void socantrcvmore(struct sonode *so) { ASSERT(MUTEX_HELD(&so->so_lock)); so->so_state |= SS_CANTRCVMORE; cv_broadcast(&so->so_state_cv); } /* * The caller has sent down a "request_prim" primitive and wants to wait for * an ack ("ack_prim") or an T_ERROR_ACK for it. * The specified "ack_prim" can be a T_OK_ACK. * * Assumes that all the TPI acks are M_PCPROTO messages. * * Note that the socket is single-threaded (using so_lock_single) * for all operations that generate TPI ack messages. Since * only TPI ack messages are M_PCPROTO we should never receive * anything except either the ack we are expecting or a T_ERROR_ACK * for the same primitive. */ int sowaitprim(struct sonode *so, t_scalar_t request_prim, t_scalar_t ack_prim, t_uscalar_t min_size, mblk_t **mpp, clock_t wait) { mblk_t *mp; union T_primitives *tpr; int error; dprintso(so, 1, ("sowaitprim(%p, %d, %d, %d, %p, %lu)\n", (void *)so, request_prim, ack_prim, min_size, (void *)mpp, wait)); ASSERT(MUTEX_HELD(&so->so_lock)); error = sowaitack(so, &mp, wait); if (error) return (error); dprintso(so, 1, ("got msg %p\n", (void *)mp)); if (DB_TYPE(mp) != M_PCPROTO || MBLKL(mp) < sizeof (tpr->type)) { freemsg(mp); eprintsoline(so, EPROTO); return (EPROTO); } tpr = (union T_primitives *)mp->b_rptr; /* * Did we get the primitive that we were asking for? * For T_OK_ACK we also check that it matches the request primitive. */ if (tpr->type == ack_prim && (ack_prim != T_OK_ACK || tpr->ok_ack.CORRECT_prim == request_prim)) { if (MBLKL(mp) >= (ssize_t)min_size) { /* Found what we are looking for */ *mpp = mp; return (0); } /* Too short */ freemsg(mp); eprintsoline(so, EPROTO); return (EPROTO); } if (tpr->type == T_ERROR_ACK && tpr->error_ack.ERROR_prim == request_prim) { /* Error to the primitive we were looking for */ if (tpr->error_ack.TLI_error == TSYSERR) { error = tpr->error_ack.UNIX_error; } else { error = proto_tlitosyserr(tpr->error_ack.TLI_error); } dprintso(so, 0, ("error_ack for %d: %d/%d ->%d\n", tpr->error_ack.ERROR_prim, tpr->error_ack.TLI_error, tpr->error_ack.UNIX_error, error)); freemsg(mp); return (error); } /* * Wrong primitive or T_ERROR_ACK for the wrong primitive */ #ifdef DEBUG if (tpr->type == T_ERROR_ACK) { dprintso(so, 0, ("error_ack for %d: %d/%d\n", tpr->error_ack.ERROR_prim, tpr->error_ack.TLI_error, tpr->error_ack.UNIX_error)); } else if (tpr->type == T_OK_ACK) { dprintso(so, 0, ("ok_ack for %d, expected %d for %d\n", tpr->ok_ack.CORRECT_prim, ack_prim, request_prim)); } else { dprintso(so, 0, ("unexpected primitive %d, expected %d for %d\n", tpr->type, ack_prim, request_prim)); } #endif /* DEBUG */ freemsg(mp); eprintsoline(so, EPROTO); return (EPROTO); } /* * Wait for a T_OK_ACK for the specified primitive. */ int sowaitokack(struct sonode *so, t_scalar_t request_prim) { mblk_t *mp; int error; error = sowaitprim(so, request_prim, T_OK_ACK, (t_uscalar_t)sizeof (struct T_ok_ack), &mp, 0); if (error) return (error); freemsg(mp); return (0); } /* * Queue a received TPI ack message on sti_ack_mp. */ void soqueueack(struct sonode *so, mblk_t *mp) { sotpi_info_t *sti = SOTOTPI(so); if (DB_TYPE(mp) != M_PCPROTO) { zcmn_err(getzoneid(), CE_WARN, "sockfs: received unexpected M_PROTO TPI ack. Prim %d\n", *(t_scalar_t *)mp->b_rptr); freemsg(mp); return; } mutex_enter(&so->so_lock); if (sti->sti_ack_mp != NULL) { dprintso(so, 1, ("sti_ack_mp already set\n")); freemsg(sti->sti_ack_mp); sti->sti_ack_mp = NULL; } sti->sti_ack_mp = mp; cv_broadcast(&sti->sti_ack_cv); mutex_exit(&so->so_lock); } /* * Wait for a TPI ack ignoring signals and errors. */ int sowaitack(struct sonode *so, mblk_t **mpp, clock_t wait) { sotpi_info_t *sti = SOTOTPI(so); ASSERT(MUTEX_HELD(&so->so_lock)); while (sti->sti_ack_mp == NULL) { #ifdef SOCK_TEST if (wait == 0 && sock_test_timelimit != 0) wait = sock_test_timelimit; #endif if (wait != 0) { /* * Only wait for the time limit. */ if (cv_reltimedwait(&sti->sti_ack_cv, &so->so_lock, wait, TR_CLOCK_TICK) == -1) { eprintsoline(so, ETIME); return (ETIME); } } else cv_wait(&sti->sti_ack_cv, &so->so_lock); } *mpp = sti->sti_ack_mp; #ifdef DEBUG { union T_primitives *tpr; mblk_t *mp = *mpp; tpr = (union T_primitives *)mp->b_rptr; ASSERT(DB_TYPE(mp) == M_PCPROTO); ASSERT(tpr->type == T_OK_ACK || tpr->type == T_ERROR_ACK || tpr->type == T_BIND_ACK || tpr->type == T_CAPABILITY_ACK || tpr->type == T_INFO_ACK || tpr->type == T_OPTMGMT_ACK); } #endif /* DEBUG */ sti->sti_ack_mp = NULL; return (0); } /* * Queue a received T_CONN_IND message on sti_conn_ind_head/tail. */ void soqueueconnind(struct sonode *so, mblk_t *mp) { sotpi_info_t *sti = SOTOTPI(so); if (DB_TYPE(mp) != M_PROTO) { zcmn_err(getzoneid(), CE_WARN, "sockfs: received unexpected M_PCPROTO T_CONN_IND\n"); freemsg(mp); return; } mutex_enter(&so->so_lock); ASSERT(mp->b_next == NULL); if (sti->sti_conn_ind_head == NULL) { sti->sti_conn_ind_head = mp; } else { ASSERT(sti->sti_conn_ind_tail->b_next == NULL); sti->sti_conn_ind_tail->b_next = mp; } sti->sti_conn_ind_tail = mp; /* Wakeup a single consumer of the T_CONN_IND */ cv_signal(&so->so_acceptq_cv); mutex_exit(&so->so_lock); } /* * Wait for a T_CONN_IND. * Don't wait if nonblocking. * Accept signals and socket errors. */ int sowaitconnind(struct sonode *so, int fmode, mblk_t **mpp) { mblk_t *mp; sotpi_info_t *sti = SOTOTPI(so); int error = 0; ASSERT(MUTEX_NOT_HELD(&so->so_lock)); mutex_enter(&so->so_lock); check_error: if (so->so_error) { error = sogeterr(so, B_TRUE); if (error) { mutex_exit(&so->so_lock); return (error); } } if (sti->sti_conn_ind_head == NULL) { if (fmode & (FNDELAY|FNONBLOCK)) { error = EWOULDBLOCK; goto done; } if (so->so_state & SS_CLOSING) { error = EINTR; goto done; } if (!cv_wait_sig_swap(&so->so_acceptq_cv, &so->so_lock)) { error = EINTR; goto done; } goto check_error; } mp = sti->sti_conn_ind_head; sti->sti_conn_ind_head = mp->b_next; mp->b_next = NULL; if (sti->sti_conn_ind_head == NULL) { ASSERT(sti->sti_conn_ind_tail == mp); sti->sti_conn_ind_tail = NULL; } *mpp = mp; done: mutex_exit(&so->so_lock); return (error); } /* * Flush a T_CONN_IND matching the sequence number from the list. * Return zero if found; non-zero otherwise. * This is called very infrequently thus it is ok to do a linear search. */ int soflushconnind(struct sonode *so, t_scalar_t seqno) { mblk_t *prevmp, *mp; struct T_conn_ind *tci; sotpi_info_t *sti = SOTOTPI(so); mutex_enter(&so->so_lock); for (prevmp = NULL, mp = sti->sti_conn_ind_head; mp != NULL; prevmp = mp, mp = mp->b_next) { tci = (struct T_conn_ind *)mp->b_rptr; if (tci->SEQ_number == seqno) { dprintso(so, 1, ("t_discon_ind: found T_CONN_IND %d\n", seqno)); /* Deleting last? */ if (sti->sti_conn_ind_tail == mp) { sti->sti_conn_ind_tail = prevmp; } if (prevmp == NULL) { /* Deleting first */ sti->sti_conn_ind_head = mp->b_next; } else { prevmp->b_next = mp->b_next; } mp->b_next = NULL; ASSERT((sti->sti_conn_ind_head == NULL && sti->sti_conn_ind_tail == NULL) || (sti->sti_conn_ind_head != NULL && sti->sti_conn_ind_tail != NULL)); so->so_error = ECONNABORTED; mutex_exit(&so->so_lock); freemsg(mp); return (0); } } mutex_exit(&so->so_lock); dprintso(so, 1, ("t_discon_ind: NOT found T_CONN_IND %d\n", seqno)); return (-1); } /* * Wait until the socket is connected or there is an error. * fmode should contain any nonblocking flags. nosig should be * set if the caller does not want the wait to be interrupted by a signal. */ int sowaitconnected(struct sonode *so, int fmode, int nosig) { int error; ASSERT(MUTEX_HELD(&so->so_lock)); while ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == SS_ISCONNECTING && so->so_error == 0) { dprintso(so, 1, ("waiting for SS_ISCONNECTED on %p\n", (void *)so)); if (fmode & (FNDELAY|FNONBLOCK)) return (EINPROGRESS); if (so->so_state & SS_CLOSING) return (EINTR); if (nosig) cv_wait(&so->so_state_cv, &so->so_lock); else if (!cv_wait_sig_swap(&so->so_state_cv, &so->so_lock)) { /* * Return EINTR and let the application use * nonblocking techniques for detecting when * the connection has been established. */ return (EINTR); } dprintso(so, 1, ("awoken on %p\n", (void *)so)); } if (so->so_error != 0) { error = sogeterr(so, B_TRUE); ASSERT(error != 0); dprintso(so, 1, ("sowaitconnected: error %d\n", error)); return (error); } if (!(so->so_state & SS_ISCONNECTED)) { /* * Could have received a T_ORDREL_IND or a T_DISCON_IND with * zero errno. Or another thread could have consumed so_error * e.g. by calling read. */ error = ECONNREFUSED; dprintso(so, 1, ("sowaitconnected: error %d\n", error)); return (error); } return (0); } /* * Handle the signal generation aspect of urgent data. */ static void so_oob_sig(struct sonode *so, int extrasig, strsigset_t *signals, strpollset_t *pollwakeups) { sotpi_info_t *sti = SOTOTPI(so); ASSERT(MUTEX_HELD(&so->so_lock)); ASSERT(so_verify_oobstate(so)); ASSERT(sti->sti_oobsigcnt >= sti->sti_oobcnt); if (sti->sti_oobsigcnt > sti->sti_oobcnt) { /* * Signal has already been generated once for this * urgent "event". However, since TCP can receive updated * urgent pointers we still generate a signal. */ ASSERT(so->so_state & SS_OOBPEND); if (extrasig) { *signals |= S_RDBAND; *pollwakeups |= POLLRDBAND; } return; } sti->sti_oobsigcnt++; ASSERT(sti->sti_oobsigcnt > 0); /* Wraparound */ ASSERT(sti->sti_oobsigcnt > sti->sti_oobcnt); /* * Record (for select/poll) that urgent data is pending. */ so->so_state |= SS_OOBPEND; /* * New urgent data on the way so forget about any old * urgent data. */ so->so_state &= ~(SS_HAVEOOBDATA|SS_HADOOBDATA); if (so->so_oobmsg != NULL) { dprintso(so, 1, ("sock: discarding old oob\n")); freemsg(so->so_oobmsg); so->so_oobmsg = NULL; } *signals |= S_RDBAND; *pollwakeups |= POLLRDBAND; ASSERT(so_verify_oobstate(so)); } /* * Handle the processing of the T_EXDATA_IND with urgent data. * Returns the T_EXDATA_IND if it should be queued on the read queue. */ /* ARGSUSED2 */ static mblk_t * so_oob_exdata(struct sonode *so, mblk_t *mp, strsigset_t *signals, strpollset_t *pollwakeups) { sotpi_info_t *sti = SOTOTPI(so); ASSERT(MUTEX_HELD(&so->so_lock)); ASSERT(so_verify_oobstate(so)); ASSERT(sti->sti_oobsigcnt > sti->sti_oobcnt); sti->sti_oobcnt++; ASSERT(sti->sti_oobcnt > 0); /* wraparound? */ ASSERT(sti->sti_oobsigcnt >= sti->sti_oobcnt); /* * Set MSGMARK for SIOCATMARK. */ mp->b_flag |= MSGMARK; ASSERT(so_verify_oobstate(so)); return (mp); } /* * Handle the processing of the actual urgent data. * Returns the data mblk if it should be queued on the read queue. */ static mblk_t * so_oob_data(struct sonode *so, mblk_t *mp, strsigset_t *signals, strpollset_t *pollwakeups) { sotpi_info_t *sti = SOTOTPI(so); ASSERT(MUTEX_HELD(&so->so_lock)); ASSERT(so_verify_oobstate(so)); ASSERT(sti->sti_oobsigcnt >= sti->sti_oobcnt); ASSERT(mp != NULL); /* * For OOBINLINE we keep the data in the T_EXDATA_IND. * Otherwise we store it in so_oobmsg. */ ASSERT(so->so_oobmsg == NULL); if (so->so_options & SO_OOBINLINE) { *pollwakeups |= POLLIN | POLLRDNORM | POLLRDBAND; *signals |= S_INPUT | S_RDNORM; } else { *pollwakeups |= POLLRDBAND; so->so_state |= SS_HAVEOOBDATA; so->so_oobmsg = mp; mp = NULL; } ASSERT(so_verify_oobstate(so)); return (mp); } /* * Caller must hold the mutex. * For delayed processing, save the T_DISCON_IND received * from below on sti_discon_ind_mp. * When the message is processed the framework will call: * (*func)(so, mp); */ static void so_save_discon_ind(struct sonode *so, mblk_t *mp, void (*func)(struct sonode *so, mblk_t *)) { sotpi_info_t *sti = SOTOTPI(so); ASSERT(MUTEX_HELD(&so->so_lock)); /* * Discard new T_DISCON_IND if we have already received another. * Currently the earlier message can either be on sti_discon_ind_mp * or being processed. */ if (sti->sti_discon_ind_mp != NULL || (so->so_flag & SOASYNC_UNBIND)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: received unexpected additional T_DISCON_IND\n"); freemsg(mp); return; } mp->b_prev = (mblk_t *)func; mp->b_next = NULL; sti->sti_discon_ind_mp = mp; } /* * Caller must hold the mutex and make sure that either SOLOCKED * or SOASYNC_UNBIND is set. Called from so_unlock_single(). * Perform delayed processing of T_DISCON_IND message on sti_discon_ind_mp. * Need to ensure that strsock_proto() will not end up sleeping for * SOASYNC_UNBIND, while executing this function. */ void so_drain_discon_ind(struct sonode *so) { mblk_t *bp; void (*func)(struct sonode *so, mblk_t *); sotpi_info_t *sti = SOTOTPI(so); ASSERT(MUTEX_HELD(&so->so_lock)); ASSERT(so->so_flag & (SOLOCKED|SOASYNC_UNBIND)); /* Process T_DISCON_IND on sti_discon_ind_mp */ if ((bp = sti->sti_discon_ind_mp) != NULL) { sti->sti_discon_ind_mp = NULL; func = (void (*)())bp->b_prev; bp->b_prev = NULL; /* * This (*func) is supposed to generate a message downstream * and we need to have a flag set until the corresponding * upstream message reaches stream head. * When processing T_DISCON_IND in strsock_discon_ind * we hold SOASYN_UNBIND when sending T_UNBIND_REQ down and * drop the flag after we get the ACK in strsock_proto. */ (void) (*func)(so, bp); } } /* * Caller must hold the mutex. * Remove the T_DISCON_IND on sti_discon_ind_mp. */ void so_flush_discon_ind(struct sonode *so) { mblk_t *bp; sotpi_info_t *sti = SOTOTPI(so); ASSERT(MUTEX_HELD(&so->so_lock)); /* * Remove T_DISCON_IND mblk at sti_discon_ind_mp. */ if ((bp = sti->sti_discon_ind_mp) != NULL) { sti->sti_discon_ind_mp = NULL; bp->b_prev = NULL; freemsg(bp); } } /* * Caller must hold the mutex. * * This function is used to process the T_DISCON_IND message. It does * immediate processing when called from strsock_proto and delayed * processing of discon_ind saved on sti_discon_ind_mp when called from * so_drain_discon_ind. When a T_DISCON_IND message is saved in * sti_discon_ind_mp for delayed processing, this function is registered * as the callback function to process the message. * * SOASYNC_UNBIND should be held in this function, during the non-blocking * unbind operation, and should be released only after we receive the ACK * in strsock_proto, for the T_UNBIND_REQ sent here. Since SOLOCKED is not set, * no TPI messages would be sent down at this time. This is to prevent M_FLUSH * sent from either this function or tcp_unbind(), flushing away any TPI * message that is being sent down and stays in a lower module's queue. * * This function drops so_lock and grabs it again. */ static void strsock_discon_ind(struct sonode *so, mblk_t *discon_mp) { struct vnode *vp; struct stdata *stp; union T_primitives *tpr; struct T_unbind_req *ubr; mblk_t *mp; int error; sotpi_info_t *sti = SOTOTPI(so); ASSERT(MUTEX_HELD(&so->so_lock)); ASSERT(discon_mp); ASSERT(discon_mp->b_rptr); tpr = (union T_primitives *)discon_mp->b_rptr; ASSERT(tpr->type == T_DISCON_IND); vp = SOTOV(so); stp = vp->v_stream; ASSERT(stp); /* * Not a listener */ ASSERT((so->so_state & SS_ACCEPTCONN) == 0); /* * This assumes that the name space for DISCON_reason * is the errno name space. */ soisdisconnected(so, tpr->discon_ind.DISCON_reason); sti->sti_laddr_valid = 0; sti->sti_faddr_valid = 0; /* * Unbind with the transport without blocking. * If we've already received a T_DISCON_IND do not unbind. * * If there is no preallocated unbind message, we have already * unbound with the transport * * If the socket is not bound, no need to unbind. */ mp = sti->sti_unbind_mp; if (mp == NULL) { ASSERT(!(so->so_state & SS_ISBOUND)); mutex_exit(&so->so_lock); } else if (!(so->so_state & SS_ISBOUND)) { mutex_exit(&so->so_lock); } else { sti->sti_unbind_mp = NULL; /* * Is another T_DISCON_IND being processed. */ ASSERT((so->so_flag & SOASYNC_UNBIND) == 0); /* * Make strsock_proto ignore T_OK_ACK and T_ERROR_ACK for * this unbind. Set SOASYNC_UNBIND. This should be cleared * only after we receive the ACK in strsock_proto. */ so->so_flag |= SOASYNC_UNBIND; ASSERT(!(so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING))); so->so_state &= ~(SS_ISBOUND|SS_ACCEPTCONN); sti->sti_laddr_valid = 0; mutex_exit(&so->so_lock); /* * Send down T_UNBIND_REQ ignoring flow control. * XXX Assumes that MSG_IGNFLOW implies that this thread * does not run service procedures. */ ASSERT(DB_TYPE(mp) == M_PROTO); ubr = (struct T_unbind_req *)mp->b_rptr; mp->b_wptr += sizeof (*ubr); ubr->PRIM_type = T_UNBIND_REQ; /* * Flush the read and write side (except stream head read queue) * and send down T_UNBIND_REQ. */ (void) putnextctl1(strvp2wq(SOTOV(so)), M_FLUSH, FLUSHRW); error = kstrputmsg(SOTOV(so), mp, NULL, 0, 0, MSG_BAND|MSG_HOLDSIG|MSG_IGNERROR|MSG_IGNFLOW, 0); /* LINTED - warning: statement has no consequent: if */ if (error) { eprintsoline(so, error); } } if (tpr->discon_ind.DISCON_reason != 0) strsetrerror(SOTOV(so), 0, 0, sogetrderr); strsetwerror(SOTOV(so), 0, 0, sogetwrerr); strseteof(SOTOV(so), 1); /* * strseteof takes care of read side wakeups, * pollwakeups, and signals. */ dprintso(so, 1, ("T_DISCON_IND: error %d\n", so->so_error)); freemsg(discon_mp); pollwakeup(&stp->sd_pollist, POLLOUT); mutex_enter(&stp->sd_lock); /* * Wake sleeping write */ if (stp->sd_flag & WSLEEP) { stp->sd_flag &= ~WSLEEP; cv_broadcast(&stp->sd_wrq->q_wait); } /* * strsendsig can handle multiple signals with a * single call. Send SIGPOLL for S_OUTPUT event. */ if (stp->sd_sigflags & S_OUTPUT) strsendsig(stp->sd_siglist, S_OUTPUT, 0, 0); mutex_exit(&stp->sd_lock); mutex_enter(&so->so_lock); } /* * This routine is registered with the stream head to receive M_PROTO * and M_PCPROTO messages. * * Returns NULL if the message was consumed. * Returns an mblk to make that mblk be processed (and queued) by the stream * head. * * Sets the return parameters (*wakeups, *firstmsgsigs, *allmsgsigs, and * *pollwakeups) for the stream head to take action on. Note that since * sockets always deliver SIGIO for every new piece of data this routine * never sets *firstmsgsigs; any signals are returned in *allmsgsigs. * * This routine handles all data related TPI messages independent of * the type of the socket i.e. it doesn't care if T_UNITDATA_IND message * arrive on a SOCK_STREAM. */ static mblk_t * strsock_proto(vnode_t *vp, mblk_t *mp, strwakeup_t *wakeups, strsigset_t *firstmsgsigs, strsigset_t *allmsgsigs, strpollset_t *pollwakeups) { union T_primitives *tpr; struct sonode *so; sotpi_info_t *sti; uint32_t auditing = AU_AUDITING(); so = VTOSO(vp); sti = SOTOTPI(so); dprintso(so, 1, ("strsock_proto(%p, %p)\n", (void *)vp, (void *)mp)); /* Set default return values */ *firstmsgsigs = *wakeups = *allmsgsigs = *pollwakeups = 0; ASSERT(DB_TYPE(mp) == M_PROTO || DB_TYPE(mp) == M_PCPROTO); if (MBLKL(mp) < sizeof (tpr->type)) { /* The message is too short to even contain the primitive */ zcmn_err(getzoneid(), CE_WARN, "sockfs: Too short TPI message received. Len = %ld\n", (ptrdiff_t)(MBLKL(mp))); freemsg(mp); return (NULL); } if (!__TPI_PRIM_ISALIGNED(mp->b_rptr)) { /* The read pointer is not aligned correctly for TPI */ zcmn_err(getzoneid(), CE_WARN, "sockfs: Unaligned TPI message received. rptr = %p\n", (void *)mp->b_rptr); freemsg(mp); return (NULL); } tpr = (union T_primitives *)mp->b_rptr; dprintso(so, 1, ("strsock_proto: primitive %d\n", tpr->type)); switch (tpr->type) { case T_DATA_IND: if (MBLKL(mp) < sizeof (struct T_data_ind)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: Too short T_DATA_IND. Len = %ld\n", (ptrdiff_t)(MBLKL(mp))); freemsg(mp); return (NULL); } /* * Ignore zero-length T_DATA_IND messages. These might be * generated by some transports. * This is needed to prevent read (which skips the M_PROTO * part) to unexpectedly return 0 (or return EWOULDBLOCK * on a non-blocking socket after select/poll has indicated * that data is available). */ if (msgdsize(mp->b_cont) == 0) { dprintso(so, 0, ("strsock_proto: zero length T_DATA_IND\n")); freemsg(mp); return (NULL); } *allmsgsigs = S_INPUT | S_RDNORM; *pollwakeups = POLLIN | POLLRDNORM; *wakeups = RSLEEP; return (mp); case T_UNITDATA_IND: { struct T_unitdata_ind *tudi = &tpr->unitdata_ind; void *addr; t_uscalar_t addrlen; if (MBLKL(mp) < sizeof (struct T_unitdata_ind)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: Too short T_UNITDATA_IND. Len = %ld\n", (ptrdiff_t)(MBLKL(mp))); freemsg(mp); return (NULL); } /* Is this is not a connected datagram socket? */ if ((so->so_mode & SM_CONNREQUIRED) || !(so->so_state & SS_ISCONNECTED)) { /* * Not a connected datagram socket. Look for * the SO_UNIX_CLOSE option. If such an option is found * discard the message (since it has no meaning * unless connected). */ if (so->so_family == AF_UNIX && msgdsize(mp) == 0 && tudi->OPT_length != 0) { void *opt; t_uscalar_t optlen = tudi->OPT_length; opt = sogetoff(mp, tudi->OPT_offset, optlen, __TPI_ALIGN_SIZE); if (opt == NULL) { /* The len/off falls outside mp */ freemsg(mp); mutex_enter(&so->so_lock); soseterror(so, EPROTO); mutex_exit(&so->so_lock); zcmn_err(getzoneid(), CE_WARN, "sockfs: T_unidata_ind with " "invalid optlen/offset %u/%d\n", optlen, tudi->OPT_offset); return (NULL); } if (so_getopt_unix_close(opt, optlen)) { freemsg(mp); return (NULL); } } *allmsgsigs = S_INPUT | S_RDNORM; *pollwakeups = POLLIN | POLLRDNORM; *wakeups = RSLEEP; if (auditing) audit_sock(T_UNITDATA_IND, strvp2wq(vp), mp, 0); return (mp); } /* * A connect datagram socket. For AF_INET{,6} we verify that * the source address matches the "connected to" address. * The semantics of AF_UNIX sockets is to not verify * the source address. * Note that this source address verification is transport * specific. Thus the real fix would be to extent TPI * to allow T_CONN_REQ messages to be send to connectionless * transport providers and always let the transport provider * do whatever filtering is needed. * * The verification/filtering semantics for transports * other than AF_INET and AF_UNIX are unknown. The choice * would be to either filter using bcmp or let all messages * get through. This code does not filter other address * families since this at least allows the application to * work around any missing filtering. * * XXX Should we move filtering to UDP/ICMP??? * That would require passing e.g. a T_DISCON_REQ to UDP * when the socket becomes unconnected. */ addrlen = tudi->SRC_length; /* * The alignment restriction is really to strict but * we want enough alignment to inspect the fields of * a sockaddr_in. */ addr = sogetoff(mp, tudi->SRC_offset, addrlen, __TPI_ALIGN_SIZE); if (addr == NULL) { freemsg(mp); mutex_enter(&so->so_lock); soseterror(so, EPROTO); mutex_exit(&so->so_lock); zcmn_err(getzoneid(), CE_WARN, "sockfs: T_unidata_ind with invalid " "addrlen/offset %u/%d\n", addrlen, tudi->SRC_offset); return (NULL); } if (so->so_family == AF_INET) { /* * For AF_INET we allow wildcarding both sin_addr * and sin_port. */ struct sockaddr_in *faddr, *sin; /* Prevent sti_faddr_sa from changing while accessed */ mutex_enter(&so->so_lock); ASSERT(sti->sti_faddr_len == (socklen_t)sizeof (struct sockaddr_in)); faddr = (struct sockaddr_in *)sti->sti_faddr_sa; sin = (struct sockaddr_in *)addr; if (addrlen != (t_uscalar_t)sizeof (struct sockaddr_in) || (sin->sin_addr.s_addr != faddr->sin_addr.s_addr && faddr->sin_addr.s_addr != INADDR_ANY) || (so->so_type != SOCK_RAW && sin->sin_port != faddr->sin_port && faddr->sin_port != 0)) { #ifdef DEBUG dprintso(so, 0, ("sockfs: T_UNITDATA_IND mismatch: %s", pr_addr(so->so_family, (struct sockaddr *)addr, addrlen))); dprintso(so, 0, (" - %s\n", pr_addr(so->so_family, sti->sti_faddr_sa, (t_uscalar_t)sti->sti_faddr_len))); #endif /* DEBUG */ mutex_exit(&so->so_lock); freemsg(mp); return (NULL); } mutex_exit(&so->so_lock); } else if (so->so_family == AF_INET6) { /* * For AF_INET6 we allow wildcarding both sin6_addr * and sin6_port. */ struct sockaddr_in6 *faddr6, *sin6; static struct in6_addr zeroes; /* inits to all zeros */ /* Prevent sti_faddr_sa from changing while accessed */ mutex_enter(&so->so_lock); ASSERT(sti->sti_faddr_len == (socklen_t)sizeof (struct sockaddr_in6)); faddr6 = (struct sockaddr_in6 *)sti->sti_faddr_sa; sin6 = (struct sockaddr_in6 *)addr; /* XXX could we get a mapped address ::ffff:0.0.0.0 ? */ if (addrlen != (t_uscalar_t)sizeof (struct sockaddr_in6) || (!IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, &faddr6->sin6_addr) && !IN6_ARE_ADDR_EQUAL(&faddr6->sin6_addr, &zeroes)) || (so->so_type != SOCK_RAW && sin6->sin6_port != faddr6->sin6_port && faddr6->sin6_port != 0)) { #ifdef DEBUG dprintso(so, 0, ("sockfs: T_UNITDATA_IND mismatch: %s", pr_addr(so->so_family, (struct sockaddr *)addr, addrlen))); dprintso(so, 0, (" - %s\n", pr_addr(so->so_family, sti->sti_faddr_sa, (t_uscalar_t)sti->sti_faddr_len))); #endif /* DEBUG */ mutex_exit(&so->so_lock); freemsg(mp); return (NULL); } mutex_exit(&so->so_lock); } else if (so->so_family == AF_UNIX && msgdsize(mp->b_cont) == 0 && tudi->OPT_length != 0) { /* * Attempt to extract AF_UNIX * SO_UNIX_CLOSE indication from options. */ void *opt; t_uscalar_t optlen = tudi->OPT_length; opt = sogetoff(mp, tudi->OPT_offset, optlen, __TPI_ALIGN_SIZE); if (opt == NULL) { /* The len/off falls outside mp */ freemsg(mp); mutex_enter(&so->so_lock); soseterror(so, EPROTO); mutex_exit(&so->so_lock); zcmn_err(getzoneid(), CE_WARN, "sockfs: T_unidata_ind with invalid " "optlen/offset %u/%d\n", optlen, tudi->OPT_offset); return (NULL); } /* * If we received a unix close indication mark the * socket and discard this message. */ if (so_getopt_unix_close(opt, optlen)) { mutex_enter(&so->so_lock); sobreakconn(so, ECONNRESET); mutex_exit(&so->so_lock); strsetrerror(SOTOV(so), 0, 0, sogetrderr); freemsg(mp); *pollwakeups = POLLIN | POLLRDNORM; *allmsgsigs = S_INPUT | S_RDNORM; *wakeups = RSLEEP; return (NULL); } } *allmsgsigs = S_INPUT | S_RDNORM; *pollwakeups = POLLIN | POLLRDNORM; *wakeups = RSLEEP; return (mp); } case T_OPTDATA_IND: { struct T_optdata_ind *tdi = &tpr->optdata_ind; if (MBLKL(mp) < sizeof (struct T_optdata_ind)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: Too short T_OPTDATA_IND. Len = %ld\n", (ptrdiff_t)(MBLKL(mp))); freemsg(mp); return (NULL); } /* * Allow zero-length messages carrying options. * This is used when carrying the SO_UNIX_CLOSE option. */ if (so->so_family == AF_UNIX && msgdsize(mp->b_cont) == 0 && tdi->OPT_length != 0) { /* * Attempt to extract AF_UNIX close indication * from the options. Ignore any other options - * those are handled once the message is removed * from the queue. * The close indication message should not carry data. */ void *opt; t_uscalar_t optlen = tdi->OPT_length; opt = sogetoff(mp, tdi->OPT_offset, optlen, __TPI_ALIGN_SIZE); if (opt == NULL) { /* The len/off falls outside mp */ freemsg(mp); mutex_enter(&so->so_lock); soseterror(so, EPROTO); mutex_exit(&so->so_lock); zcmn_err(getzoneid(), CE_WARN, "sockfs: T_optdata_ind with invalid " "optlen/offset %u/%d\n", optlen, tdi->OPT_offset); return (NULL); } /* * If we received a close indication mark the * socket and discard this message. */ if (so_getopt_unix_close(opt, optlen)) { mutex_enter(&so->so_lock); socantsendmore(so); sti->sti_faddr_valid = 0; mutex_exit(&so->so_lock); strsetwerror(SOTOV(so), 0, 0, sogetwrerr); freemsg(mp); return (NULL); } } *allmsgsigs = S_INPUT | S_RDNORM; *pollwakeups = POLLIN | POLLRDNORM; *wakeups = RSLEEP; return (mp); } case T_EXDATA_IND: { mblk_t *mctl, *mdata; mblk_t *lbp; union T_primitives *tprp; struct stdata *stp; queue_t *qp; if (MBLKL(mp) < sizeof (struct T_exdata_ind)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: Too short T_EXDATA_IND. Len = %ld\n", (ptrdiff_t)(MBLKL(mp))); freemsg(mp); return (NULL); } /* * Ignore zero-length T_EXDATA_IND messages. These might be * generated by some transports. * * This is needed to prevent read (which skips the M_PROTO * part) to unexpectedly return 0 (or return EWOULDBLOCK * on a non-blocking socket after select/poll has indicated * that data is available). */ dprintso(so, 1, ("T_EXDATA_IND(%p): counts %d/%d state %s\n", (void *)vp, sti->sti_oobsigcnt, sti->sti_oobcnt, pr_state(so->so_state, so->so_mode))); if (msgdsize(mp->b_cont) == 0) { dprintso(so, 0, ("strsock_proto: zero length T_EXDATA_IND\n")); freemsg(mp); return (NULL); } /* * Split into the T_EXDATA_IND and the M_DATA part. * We process these three pieces separately: * signal generation * handling T_EXDATA_IND * handling M_DATA component */ mctl = mp; mdata = mctl->b_cont; mctl->b_cont = NULL; mutex_enter(&so->so_lock); so_oob_sig(so, 0, allmsgsigs, pollwakeups); mctl = so_oob_exdata(so, mctl, allmsgsigs, pollwakeups); mdata = so_oob_data(so, mdata, allmsgsigs, pollwakeups); stp = vp->v_stream; ASSERT(stp != NULL); qp = _RD(stp->sd_wrq); mutex_enter(QLOCK(qp)); lbp = qp->q_last; /* * We want to avoid queueing up a string of T_EXDATA_IND * messages with no intervening data messages at the stream * head. These messages contribute to the total message * count. Eventually this can lead to STREAMS flow contol * and also cause TCP to advertise a zero window condition * to the peer. This can happen in the degenerate case where * the sender and receiver exchange only OOB data. The sender * only sends messages with MSG_OOB flag and the receiver * receives only MSG_OOB messages and does not use SO_OOBINLINE. * An example of this scenario has been reported in applications * that use OOB data to exchange heart beats. Flow control * relief will never happen if the application only reads OOB * data which is done directly by sorecvoob() and the * T_EXDATA_IND messages at the streamhead won't be consumed. * Note that there is no correctness issue in compressing the * string of T_EXDATA_IND messages into a single T_EXDATA_IND * message. A single read that does not specify MSG_OOB will * read across all the marks in a loop in sotpi_recvmsg(). * Each mark is individually distinguishable only if the * T_EXDATA_IND messages are separated by data messages. */ if ((qp->q_first != NULL) && (DB_TYPE(lbp) == M_PROTO)) { tprp = (union T_primitives *)lbp->b_rptr; if ((tprp->type == T_EXDATA_IND) && !(so->so_options & SO_OOBINLINE)) { /* * free the new M_PROTO message */ freemsg(mctl); /* * adjust the OOB count and OOB signal count * just incremented for the new OOB data. */ sti->sti_oobcnt--; sti->sti_oobsigcnt--; mutex_exit(QLOCK(qp)); mutex_exit(&so->so_lock); return (NULL); } } mutex_exit(QLOCK(qp)); /* * Pass the T_EXDATA_IND and the M_DATA back separately * by using b_next linkage. (The stream head will queue any * b_next linked messages separately.) This is needed * since MSGMARK applies to the last by of the message * hence we can not have any M_DATA component attached * to the marked T_EXDATA_IND. Note that the stream head * will not consolidate M_DATA messages onto an MSGMARK'ed * message in order to preserve the constraint that * the T_EXDATA_IND always is a separate message. */ ASSERT(mctl != NULL); mctl->b_next = mdata; mp = mctl; #ifdef DEBUG if (mdata == NULL) { dprintso(so, 1, ("after outofline T_EXDATA_IND(%p): " "counts %d/%d poll 0x%x sig 0x%x state %s\n", (void *)vp, sti->sti_oobsigcnt, sti->sti_oobcnt, *pollwakeups, *allmsgsigs, pr_state(so->so_state, so->so_mode))); } else { dprintso(so, 1, ("after inline T_EXDATA_IND(%p): " "counts %d/%d poll 0x%x sig 0x%x state %s\n", (void *)vp, sti->sti_oobsigcnt, sti->sti_oobcnt, *pollwakeups, *allmsgsigs, pr_state(so->so_state, so->so_mode))); } #endif /* DEBUG */ mutex_exit(&so->so_lock); *wakeups = RSLEEP; return (mp); } case T_CONN_CON: { struct T_conn_con *conn_con; void *addr; t_uscalar_t addrlen; /* * Verify the state, update the state to ISCONNECTED, * record the potentially new address in the message, * and drop the message. */ if (MBLKL(mp) < sizeof (struct T_conn_con)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: Too short T_CONN_CON. Len = %ld\n", (ptrdiff_t)(MBLKL(mp))); freemsg(mp); return (NULL); } mutex_enter(&so->so_lock); if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) != SS_ISCONNECTING) { mutex_exit(&so->so_lock); dprintso(so, 1, ("T_CONN_CON: state %x\n", so->so_state)); freemsg(mp); return (NULL); } conn_con = &tpr->conn_con; addrlen = conn_con->RES_length; /* * Allow the address to be of different size than sent down * in the T_CONN_REQ as long as it doesn't exceed the maxlen. * For AF_UNIX require the identical length. */ if (so->so_family == AF_UNIX ? addrlen != (t_uscalar_t)sizeof (sti->sti_ux_laddr) : addrlen > (t_uscalar_t)sti->sti_faddr_maxlen) { zcmn_err(getzoneid(), CE_WARN, "sockfs: T_conn_con with different " "length %u/%d\n", addrlen, conn_con->RES_length); soisdisconnected(so, EPROTO); sti->sti_laddr_valid = 0; sti->sti_faddr_valid = 0; mutex_exit(&so->so_lock); strsetrerror(SOTOV(so), 0, 0, sogetrderr); strsetwerror(SOTOV(so), 0, 0, sogetwrerr); strseteof(SOTOV(so), 1); freemsg(mp); /* * strseteof takes care of read side wakeups, * pollwakeups, and signals. */ *wakeups = WSLEEP; *allmsgsigs = S_OUTPUT; *pollwakeups = POLLOUT; return (NULL); } addr = sogetoff(mp, conn_con->RES_offset, addrlen, 1); if (addr == NULL) { zcmn_err(getzoneid(), CE_WARN, "sockfs: T_conn_con with invalid " "addrlen/offset %u/%d\n", addrlen, conn_con->RES_offset); mutex_exit(&so->so_lock); strsetrerror(SOTOV(so), 0, 0, sogetrderr); strsetwerror(SOTOV(so), 0, 0, sogetwrerr); strseteof(SOTOV(so), 1); freemsg(mp); /* * strseteof takes care of read side wakeups, * pollwakeups, and signals. */ *wakeups = WSLEEP; *allmsgsigs = S_OUTPUT; *pollwakeups = POLLOUT; return (NULL); } /* * Save for getpeername. */ if (so->so_family != AF_UNIX) { sti->sti_faddr_len = (socklen_t)addrlen; ASSERT(sti->sti_faddr_len <= sti->sti_faddr_maxlen); bcopy(addr, sti->sti_faddr_sa, addrlen); sti->sti_faddr_valid = 1; } if (so->so_peercred != NULL) crfree(so->so_peercred); so->so_peercred = msg_getcred(mp, &so->so_cpid); if (so->so_peercred != NULL) crhold(so->so_peercred); /* Wakeup anybody sleeping in sowaitconnected */ soisconnected(so); mutex_exit(&so->so_lock); /* * The socket is now available for sending data. */ *wakeups = WSLEEP; *allmsgsigs = S_OUTPUT; *pollwakeups = POLLOUT; freemsg(mp); return (NULL); } case T_CONN_IND: /* * Verify the min size and queue the message on * the sti_conn_ind_head/tail list. */ if (MBLKL(mp) < sizeof (struct T_conn_ind)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: Too short T_CONN_IND. Len = %ld\n", (ptrdiff_t)(MBLKL(mp))); freemsg(mp); return (NULL); } if (auditing) audit_sock(T_CONN_IND, strvp2wq(vp), mp, 0); if (!(so->so_state & SS_ACCEPTCONN)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: T_conn_ind on non-listening socket\n"); freemsg(mp); return (NULL); } soqueueconnind(so, mp); *allmsgsigs = S_INPUT | S_RDNORM; *pollwakeups = POLLIN | POLLRDNORM; *wakeups = RSLEEP; return (NULL); case T_ORDREL_IND: if (MBLKL(mp) < sizeof (struct T_ordrel_ind)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: Too short T_ORDREL_IND. Len = %ld\n", (ptrdiff_t)(MBLKL(mp))); freemsg(mp); return (NULL); } /* * Some providers send this when not fully connected. * SunLink X.25 needs to retrieve disconnect reason after * disconnect for compatibility. It uses T_ORDREL_IND * instead of T_DISCON_IND so that it may use the * endpoint after a connect failure to retrieve the * reason using an ioctl. Thus we explicitly clear * SS_ISCONNECTING here for SunLink X.25. * This is a needed TPI violation. */ mutex_enter(&so->so_lock); so->so_state &= ~SS_ISCONNECTING; socantrcvmore(so); mutex_exit(&so->so_lock); strseteof(SOTOV(so), 1); /* * strseteof takes care of read side wakeups, * pollwakeups, and signals. */ freemsg(mp); return (NULL); case T_DISCON_IND: if (MBLKL(mp) < sizeof (struct T_discon_ind)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: Too short T_DISCON_IND. Len = %ld\n", (ptrdiff_t)(MBLKL(mp))); freemsg(mp); return (NULL); } if (so->so_state & SS_ACCEPTCONN) { /* * This is a listener. Look for a queued T_CONN_IND * with a matching sequence number and remove it * from the list. * It is normal to not find the sequence number since * the soaccept might have already dequeued it * (in which case the T_CONN_RES will fail with * TBADSEQ). */ (void) soflushconnind(so, tpr->discon_ind.SEQ_number); freemsg(mp); return (0); } /* * Not a listener * * If SS_CANTRCVMORE for AF_UNIX ignore the discon_reason. * Such a discon_ind appears when the peer has first done * a shutdown() followed by a close() in which case we just * want to record socantsendmore. * In this case sockfs first receives a T_ORDREL_IND followed * by a T_DISCON_IND. * Note that for other transports (e.g. TCP) we need to handle * the discon_ind in this case since it signals an error. */ mutex_enter(&so->so_lock); if ((so->so_state & SS_CANTRCVMORE) && (so->so_family == AF_UNIX)) { socantsendmore(so); sti->sti_faddr_valid = 0; mutex_exit(&so->so_lock); strsetwerror(SOTOV(so), 0, 0, sogetwrerr); dprintso(so, 1, ("T_DISCON_IND: error %d\n", so->so_error)); freemsg(mp); /* * Set these variables for caller to process them. * For the else part where T_DISCON_IND is processed, * this will be done in the function being called * (strsock_discon_ind()) */ *wakeups = WSLEEP; *allmsgsigs = S_OUTPUT; *pollwakeups = POLLOUT; } else if (so->so_flag & (SOASYNC_UNBIND | SOLOCKED)) { /* * Deferred processing of T_DISCON_IND */ so_save_discon_ind(so, mp, strsock_discon_ind); mutex_exit(&so->so_lock); } else { /* * Process T_DISCON_IND now */ (void) strsock_discon_ind(so, mp); mutex_exit(&so->so_lock); } return (NULL); case T_UDERROR_IND: { struct T_uderror_ind *tudi = &tpr->uderror_ind; void *addr; t_uscalar_t addrlen; int error; dprintso(so, 0, ("T_UDERROR_IND: error %d\n", tudi->ERROR_type)); if (MBLKL(mp) < sizeof (struct T_uderror_ind)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: Too short T_UDERROR_IND. Len = %ld\n", (ptrdiff_t)(MBLKL(mp))); freemsg(mp); return (NULL); } /* Ignore on connection-oriented transports */ if (so->so_mode & SM_CONNREQUIRED) { freemsg(mp); eprintsoline(so, 0); zcmn_err(getzoneid(), CE_WARN, "sockfs: T_uderror_ind on connection-oriented " "transport\n"); return (NULL); } addrlen = tudi->DEST_length; addr = sogetoff(mp, tudi->DEST_offset, addrlen, 1); if (addr == NULL) { zcmn_err(getzoneid(), CE_WARN, "sockfs: T_uderror_ind with invalid " "addrlen/offset %u/%d\n", addrlen, tudi->DEST_offset); freemsg(mp); return (NULL); } /* Verify source address for connected socket. */ mutex_enter(&so->so_lock); if (so->so_state & SS_ISCONNECTED) { void *faddr; t_uscalar_t faddr_len; boolean_t match = B_FALSE; switch (so->so_family) { case AF_INET: { /* Compare just IP address and port */ struct sockaddr_in *sin1, *sin2; sin1 = (struct sockaddr_in *)sti->sti_faddr_sa; sin2 = (struct sockaddr_in *)addr; if (addrlen == sizeof (struct sockaddr_in) && sin1->sin_port == sin2->sin_port && sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) match = B_TRUE; break; } case AF_INET6: { /* Compare just IP address and port. Not flow */ struct sockaddr_in6 *sin1, *sin2; sin1 = (struct sockaddr_in6 *)sti->sti_faddr_sa; sin2 = (struct sockaddr_in6 *)addr; if (addrlen == sizeof (struct sockaddr_in6) && sin1->sin6_port == sin2->sin6_port && IN6_ARE_ADDR_EQUAL(&sin1->sin6_addr, &sin2->sin6_addr)) match = B_TRUE; break; } case AF_UNIX: faddr = &sti->sti_ux_faddr; faddr_len = (t_uscalar_t)sizeof (sti->sti_ux_faddr); if (faddr_len == addrlen && bcmp(addr, faddr, addrlen) == 0) match = B_TRUE; break; default: faddr = sti->sti_faddr_sa; faddr_len = (t_uscalar_t)sti->sti_faddr_len; if (faddr_len == addrlen && bcmp(addr, faddr, addrlen) == 0) match = B_TRUE; break; } if (!match) { #ifdef DEBUG dprintso(so, 0, ("sockfs: T_UDERR_IND mismatch: %s - ", pr_addr(so->so_family, (struct sockaddr *)addr, addrlen))); dprintso(so, 0, ("%s\n", pr_addr(so->so_family, sti->sti_faddr_sa, sti->sti_faddr_len))); #endif /* DEBUG */ mutex_exit(&so->so_lock); freemsg(mp); return (NULL); } /* * Make the write error nonpersistent. If the error * is zero we use ECONNRESET. * This assumes that the name space for ERROR_type * is the errno name space. */ if (tudi->ERROR_type != 0) error = tudi->ERROR_type; else error = ECONNRESET; soseterror(so, error); mutex_exit(&so->so_lock); strsetrerror(SOTOV(so), 0, 0, sogetrderr); strsetwerror(SOTOV(so), 0, 0, sogetwrerr); *wakeups = RSLEEP | WSLEEP; *allmsgsigs = S_INPUT | S_RDNORM | S_OUTPUT; *pollwakeups = POLLIN | POLLRDNORM | POLLOUT; freemsg(mp); return (NULL); } /* * If the application asked for delayed errors * record the T_UDERROR_IND sti_eaddr_mp and the reason in * sti_delayed_error for delayed error posting. If the reason * is zero use ECONNRESET. * Note that delayed error indications do not make sense for * AF_UNIX sockets since sendto checks that the destination * address is valid at the time of the sendto. */ if (!(so->so_options & SO_DGRAM_ERRIND)) { mutex_exit(&so->so_lock); freemsg(mp); return (NULL); } if (sti->sti_eaddr_mp != NULL) freemsg(sti->sti_eaddr_mp); sti->sti_eaddr_mp = mp; if (tudi->ERROR_type != 0) error = tudi->ERROR_type; else error = ECONNRESET; sti->sti_delayed_error = (ushort_t)error; mutex_exit(&so->so_lock); return (NULL); } case T_ERROR_ACK: dprintso(so, 0, ("strsock_proto: T_ERROR_ACK for %d, error %d/%d\n", tpr->error_ack.ERROR_prim, tpr->error_ack.TLI_error, tpr->error_ack.UNIX_error)); if (MBLKL(mp) < sizeof (struct T_error_ack)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: Too short T_ERROR_ACK. Len = %ld\n", (ptrdiff_t)(MBLKL(mp))); freemsg(mp); return (NULL); } /* * Check if we were waiting for the async message */ mutex_enter(&so->so_lock); if ((so->so_flag & SOASYNC_UNBIND) && tpr->error_ack.ERROR_prim == T_UNBIND_REQ) { so_unlock_single(so, SOASYNC_UNBIND); mutex_exit(&so->so_lock); freemsg(mp); return (NULL); } mutex_exit(&so->so_lock); soqueueack(so, mp); return (NULL); case T_OK_ACK: if (MBLKL(mp) < sizeof (struct T_ok_ack)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: Too short T_OK_ACK. Len = %ld\n", (ptrdiff_t)(MBLKL(mp))); freemsg(mp); return (NULL); } /* * Check if we were waiting for the async message */ mutex_enter(&so->so_lock); if ((so->so_flag & SOASYNC_UNBIND) && tpr->ok_ack.CORRECT_prim == T_UNBIND_REQ) { dprintso(so, 1, ("strsock_proto: T_OK_ACK async unbind\n")); so_unlock_single(so, SOASYNC_UNBIND); mutex_exit(&so->so_lock); freemsg(mp); return (NULL); } mutex_exit(&so->so_lock); soqueueack(so, mp); return (NULL); case T_INFO_ACK: if (MBLKL(mp) < sizeof (struct T_info_ack)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: Too short T_INFO_ACK. Len = %ld\n", (ptrdiff_t)(MBLKL(mp))); freemsg(mp); return (NULL); } soqueueack(so, mp); return (NULL); case T_CAPABILITY_ACK: /* * A T_capability_ack need only be large enough to hold * the PRIM_type and CAP_bits1 fields; checking for anything * larger might reject a correct response from an older * provider. */ if (MBLKL(mp) < 2 * sizeof (t_uscalar_t)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: Too short T_CAPABILITY_ACK. Len = %ld\n", (ptrdiff_t)(MBLKL(mp))); freemsg(mp); return (NULL); } soqueueack(so, mp); return (NULL); case T_BIND_ACK: if (MBLKL(mp) < sizeof (struct T_bind_ack)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: Too short T_BIND_ACK. Len = %ld\n", (ptrdiff_t)(MBLKL(mp))); freemsg(mp); return (NULL); } soqueueack(so, mp); return (NULL); case T_OPTMGMT_ACK: if (MBLKL(mp) < sizeof (struct T_optmgmt_ack)) { zcmn_err(getzoneid(), CE_WARN, "sockfs: Too short T_OPTMGMT_ACK. Len = %ld\n", (ptrdiff_t)(MBLKL(mp))); freemsg(mp); return (NULL); } soqueueack(so, mp); return (NULL); default: #ifdef DEBUG zcmn_err(getzoneid(), CE_WARN, "sockfs: unknown TPI primitive %d received\n", tpr->type); #endif /* DEBUG */ freemsg(mp); return (NULL); } } /* * This routine is registered with the stream head to receive other * (non-data, and non-proto) messages. * * Returns NULL if the message was consumed. * Returns an mblk to make that mblk be processed by the stream head. * * Sets the return parameters (*wakeups, *firstmsgsigs, *allmsgsigs, and * *pollwakeups) for the stream head to take action on. */ static mblk_t * strsock_misc(vnode_t *vp, mblk_t *mp, strwakeup_t *wakeups, strsigset_t *firstmsgsigs, strsigset_t *allmsgsigs, strpollset_t *pollwakeups) { struct sonode *so; sotpi_info_t *sti; so = VTOSO(vp); sti = SOTOTPI(so); dprintso(so, 1, ("strsock_misc(%p, %p, 0x%x)\n", (void *)vp, (void *)mp, DB_TYPE(mp))); /* Set default return values */ *wakeups = *allmsgsigs = *firstmsgsigs = *pollwakeups = 0; switch (DB_TYPE(mp)) { case M_PCSIG: /* * This assumes that an M_PCSIG for the urgent data arrives * before the corresponding T_EXDATA_IND. * * Note: Just like in SunOS 4.X and 4.4BSD a poll will be * awoken before the urgent data shows up. * For OOBINLINE this can result in select returning * only exceptions as opposed to except|read. */ if (*mp->b_rptr == SIGURG) { mutex_enter(&so->so_lock); dprintso(so, 1, ("SIGURG(%p): counts %d/%d state %s\n", (void *)vp, sti->sti_oobsigcnt, sti->sti_oobcnt, pr_state(so->so_state, so->so_mode))); so_oob_sig(so, 1, allmsgsigs, pollwakeups); dprintso(so, 1, ("after SIGURG(%p): counts %d/%d " " poll 0x%x sig 0x%x state %s\n", (void *)vp, sti->sti_oobsigcnt, sti->sti_oobcnt, *pollwakeups, *allmsgsigs, pr_state(so->so_state, so->so_mode))); mutex_exit(&so->so_lock); } freemsg(mp); return (NULL); case M_SIG: case M_HANGUP: case M_UNHANGUP: case M_ERROR: /* M_ERRORs etc are ignored */ freemsg(mp); return (NULL); case M_FLUSH: /* * Do not flush read queue. If the M_FLUSH * arrives because of an impending T_discon_ind * we still have to keep any queued data - this is part of * socket semantics. */ if (*mp->b_rptr & FLUSHW) { *mp->b_rptr &= ~FLUSHR; return (mp); } freemsg(mp); return (NULL); default: return (mp); } } /* Register to receive signals for certain events */ int so_set_asyncsigs(vnode_t *vp, pid_t pgrp, int events, int mode, cred_t *cr) { struct strsigset ss; int32_t rval; /* * Note that SOLOCKED will be set except for the call from soaccept(). */ ASSERT(!mutex_owned(&VTOSO(vp)->so_lock)); ss.ss_pid = pgrp; ss.ss_events = events; return (strioctl(vp, I_ESETSIG, (intptr_t)&ss, mode, K_TO_K, cr, &rval)); } /* Register for events matching the SS_ASYNC flag */ int so_set_events(struct sonode *so, vnode_t *vp, cred_t *cr) { int events = so->so_state & SS_ASYNC ? S_RDBAND | S_BANDURG | S_RDNORM | S_OUTPUT : S_RDBAND | S_BANDURG; return (so_set_asyncsigs(vp, so->so_pgrp, events, 0, cr)); } /* Change the SS_ASYNC flag, and update signal delivery if needed */ int so_flip_async(struct sonode *so, vnode_t *vp, int mode, cred_t *cr) { ASSERT(mutex_owned(&so->so_lock)); if (so->so_pgrp != 0) { int error; int events = so->so_state & SS_ASYNC ? /* Old flag */ S_RDBAND | S_BANDURG : /* New sigs */ S_RDBAND | S_BANDURG | S_RDNORM | S_OUTPUT; so_lock_single(so); mutex_exit(&so->so_lock); error = so_set_asyncsigs(vp, so->so_pgrp, events, mode, cr); mutex_enter(&so->so_lock); so_unlock_single(so, SOLOCKED); if (error) return (error); } so->so_state ^= SS_ASYNC; return (0); } /* * Set new pid/pgrp for SIGPOLL (or SIGIO for FIOASYNC mode), replacing * any existing one. If passed zero, just clear the existing one. */ int so_set_siggrp(struct sonode *so, vnode_t *vp, pid_t pgrp, int mode, cred_t *cr) { int events = so->so_state & SS_ASYNC ? S_RDBAND | S_BANDURG | S_RDNORM | S_OUTPUT : S_RDBAND | S_BANDURG; int error; ASSERT(mutex_owned(&so->so_lock)); /* * Change socket process (group). * * strioctl (via so_set_asyncsigs) will perform permission check and * also keep a PID_HOLD to prevent the pid from being reused. */ so_lock_single(so); mutex_exit(&so->so_lock); if (pgrp != 0) { dprintso(so, 1, ("setown: adding pgrp %d ev 0x%x\n", pgrp, events)); error = so_set_asyncsigs(vp, pgrp, events, mode, cr); if (error != 0) { eprintsoline(so, error); goto bad; } } /* Remove the previously registered process/group */ if (so->so_pgrp != 0) { dprintso(so, 1, ("setown: removing pgrp %d\n", so->so_pgrp)); error = so_set_asyncsigs(vp, so->so_pgrp, 0, mode, cr); if (error != 0) { eprintsoline(so, error); error = 0; } } mutex_enter(&so->so_lock); so_unlock_single(so, SOLOCKED); so->so_pgrp = pgrp; return (0); bad: mutex_enter(&so->so_lock); so_unlock_single(so, SOLOCKED); return (error); } /* * Wrapper for getmsg. If the socket has been converted to a stream * pass the request to the stream head. */ int sock_getmsg( struct vnode *vp, struct strbuf *mctl, struct strbuf *mdata, uchar_t *prip, int *flagsp, int fmode, rval_t *rvp ) { struct sonode *so; ASSERT(vp->v_type == VSOCK); /* * Use the stream head to find the real socket vnode. * This is needed when namefs sits above sockfs. Some * sockets (like SCTP) are not streams. */ if (!vp->v_stream) { return (ENOSTR); } ASSERT(vp->v_stream->sd_vnode); vp = vp->v_stream->sd_vnode; ASSERT(vn_matchops(vp, socket_vnodeops)); so = VTOSO(vp); dprintso(so, 1, ("sock_getmsg(%p) %s\n", (void *)so, pr_state(so->so_state, so->so_mode))); if (so->so_version == SOV_STREAM) { /* The imaginary "sockmod" has been popped - act as a stream */ return (strgetmsg(vp, mctl, mdata, prip, flagsp, fmode, rvp)); } eprintsoline(so, ENOSTR); return (ENOSTR); } /* * Wrapper for putmsg. If the socket has been converted to a stream * pass the request to the stream head. * * Note that a while a regular socket (SOV_SOCKSTREAM) does support the * streams ioctl set it does not support putmsg and getmsg. * Allowing putmsg would prevent sockfs from tracking the state of * the socket/transport and would also invalidate the locking in sockfs. */ int sock_putmsg( struct vnode *vp, struct strbuf *mctl, struct strbuf *mdata, uchar_t pri, int flag, int fmode ) { struct sonode *so; ASSERT(vp->v_type == VSOCK); /* * Use the stream head to find the real socket vnode. * This is needed when namefs sits above sockfs. */ if (!vp->v_stream) { return (ENOSTR); } ASSERT(vp->v_stream->sd_vnode); vp = vp->v_stream->sd_vnode; ASSERT(vn_matchops(vp, socket_vnodeops)); so = VTOSO(vp); dprintso(so, 1, ("sock_putmsg(%p) %s\n", (void *)so, pr_state(so->so_state, so->so_mode))); if (so->so_version == SOV_STREAM) { /* The imaginary "sockmod" has been popped - act as a stream */ return (strputmsg(vp, mctl, mdata, pri, flag, fmode)); } eprintsoline(so, ENOSTR); return (ENOSTR); } /* * Special function called only from f_getfl(). * Returns FASYNC if the SS_ASYNC flag is set on a socket, else 0. * No locks are acquired here, so it is safe to use while uf_lock is held. * This exists solely for BSD fcntl() FASYNC compatibility. */ int sock_getfasync(vnode_t *vp) { struct sonode *so; ASSERT(vp->v_type == VSOCK); /* * For stream model, v_stream is used; For non-stream, v_stream always * equals NULL */ if (vp->v_stream != NULL) so = VTOSO(vp->v_stream->sd_vnode); else so = VTOSO(vp); if (so->so_version == SOV_STREAM || !(so->so_state & SS_ASYNC)) return (0); return (FASYNC); }