/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1982, 1986, 1988, 1993 * The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)raw_ip.c 8.7 (Berkeley) 5/15/95 */ #include __FBSDID("$FreeBSD$"); #include "opt_inet.h" #include "opt_inet6.h" #include "opt_ipsec.h" #include "opt_route.h" #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 #include extern ipproto_input_t *ip_protox[]; VNET_DEFINE(int, ip_defttl) = IPDEFTTL; SYSCTL_INT(_net_inet_ip, IPCTL_DEFTTL, ttl, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip_defttl), 0, "Maximum TTL on IP packets"); VNET_DEFINE(struct inpcbinfo, ripcbinfo); #define V_ripcbinfo VNET(ripcbinfo) /* * Control and data hooks for ipfw, dummynet, divert and so on. * The data hooks are not used here but it is convenient * to keep them all in one place. */ VNET_DEFINE(ip_fw_chk_ptr_t, ip_fw_chk_ptr) = NULL; VNET_DEFINE(ip_fw_ctl_ptr_t, ip_fw_ctl_ptr) = NULL; int (*ip_dn_ctl_ptr)(struct sockopt *); int (*ip_dn_io_ptr)(struct mbuf **, struct ip_fw_args *); void (*ip_divert_ptr)(struct mbuf *, bool); int (*ng_ipfw_input_p)(struct mbuf **, struct ip_fw_args *, bool); #ifdef INET /* * Hooks for multicast routing. They all default to NULL, so leave them not * initialized and rely on BSS being set to 0. */ /* * The socket used to communicate with the multicast routing daemon. */ VNET_DEFINE(struct socket *, ip_mrouter); /* * The various mrouter and rsvp functions. */ int (*ip_mrouter_set)(struct socket *, struct sockopt *); int (*ip_mrouter_get)(struct socket *, struct sockopt *); int (*ip_mrouter_done)(void); int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, struct ip_moptions *); int (*mrt_ioctl)(u_long, caddr_t, int); int (*legal_vif_num)(int); u_long (*ip_mcast_src)(int); int (*rsvp_input_p)(struct mbuf **, int *, int); int (*ip_rsvp_vif)(struct socket *, struct sockopt *); void (*ip_rsvp_force_done)(struct socket *); #endif /* INET */ u_long rip_sendspace = 9216; SYSCTL_ULONG(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW, &rip_sendspace, 0, "Maximum outgoing raw IP datagram size"); u_long rip_recvspace = 9216; SYSCTL_ULONG(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW, &rip_recvspace, 0, "Maximum space for incoming raw IP datagrams"); /* * Hash functions */ #define INP_PCBHASH_RAW_SIZE 256 #define INP_PCBHASH_RAW(proto, laddr, faddr, mask) \ (((proto) + (laddr) + (faddr)) % (mask) + 1) #ifdef INET static void rip_inshash(struct inpcb *inp) { struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; struct inpcbhead *pcbhash; int hash; INP_HASH_WLOCK_ASSERT(pcbinfo); INP_WLOCK_ASSERT(inp); if (inp->inp_ip_p != 0 && inp->inp_laddr.s_addr != INADDR_ANY && inp->inp_faddr.s_addr != INADDR_ANY) { hash = INP_PCBHASH_RAW(inp->inp_ip_p, inp->inp_laddr.s_addr, inp->inp_faddr.s_addr, pcbinfo->ipi_hashmask); } else hash = 0; pcbhash = &pcbinfo->ipi_hashbase[hash]; CK_LIST_INSERT_HEAD(pcbhash, inp, inp_hash); } static void rip_delhash(struct inpcb *inp) { INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); INP_WLOCK_ASSERT(inp); CK_LIST_REMOVE(inp, inp_hash); } #endif /* INET */ INPCBSTORAGE_DEFINE(ripcbstor, "rawinp", "ripcb", "rip", "riphash"); static void rip_init(void *arg __unused) { in_pcbinfo_init(&V_ripcbinfo, &ripcbstor, INP_PCBHASH_RAW_SIZE, 1); } VNET_SYSINIT(rip_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, rip_init, NULL); #ifdef VIMAGE static void rip_destroy(void *unused __unused) { in_pcbinfo_destroy(&V_ripcbinfo); } VNET_SYSUNINIT(raw_ip, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, rip_destroy, NULL); #endif #ifdef INET static int rip_append(struct inpcb *inp, struct ip *ip, struct mbuf *m, struct sockaddr_in *ripsrc) { struct socket *so = inp->inp_socket; struct mbuf *n, *opts = NULL; INP_LOCK_ASSERT(inp); #if defined(IPSEC) || defined(IPSEC_SUPPORT) /* check AH/ESP integrity. */ if (IPSEC_ENABLED(ipv4) && IPSEC_CHECK_POLICY(ipv4, m, inp) != 0) return (0); #endif /* IPSEC */ #ifdef MAC if (mac_inpcb_check_deliver(inp, m) != 0) return (0); #endif /* Check the minimum TTL for socket. */ if (inp->inp_ip_minttl && inp->inp_ip_minttl > ip->ip_ttl) return (0); if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) == NULL) return (0); if ((inp->inp_flags & INP_CONTROLOPTS) || (so->so_options & (SO_TIMESTAMP | SO_BINTIME))) ip_savecontrol(inp, &opts, ip, n); SOCKBUF_LOCK(&so->so_rcv); if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)ripsrc, n, opts) == 0) { soroverflow_locked(so); m_freem(n); if (opts) m_freem(opts); return (0); } sorwakeup_locked(so); return (1); } struct rip_inp_match_ctx { struct ip *ip; int proto; }; static bool rip_inp_match1(const struct inpcb *inp, void *v) { struct rip_inp_match_ctx *ctx = v; if (inp->inp_ip_p != ctx->proto) return (false); #ifdef INET6 /* XXX inp locking */ if ((inp->inp_vflag & INP_IPV4) == 0) return (false); #endif if (inp->inp_laddr.s_addr != ctx->ip->ip_dst.s_addr) return (false); if (inp->inp_faddr.s_addr != ctx->ip->ip_src.s_addr) return (false); return (true); } static bool rip_inp_match2(const struct inpcb *inp, void *v) { struct rip_inp_match_ctx *ctx = v; if (inp->inp_ip_p && inp->inp_ip_p != ctx->proto) return (false); #ifdef INET6 /* XXX inp locking */ if ((inp->inp_vflag & INP_IPV4) == 0) return (false); #endif if (!in_nullhost(inp->inp_laddr) && !in_hosteq(inp->inp_laddr, ctx->ip->ip_dst)) return (false); if (!in_nullhost(inp->inp_faddr) && !in_hosteq(inp->inp_faddr, ctx->ip->ip_src)) return (false); return (true); } /* * Setup generic address and protocol structures for raw_input routine, then * pass them along with mbuf chain. */ int rip_input(struct mbuf **mp, int *offp, int proto) { struct rip_inp_match_ctx ctx = { .ip = mtod(*mp, struct ip *), .proto = proto, }; struct inpcb_iterator inpi = INP_ITERATOR(&V_ripcbinfo, INPLOOKUP_RLOCKPCB, rip_inp_match1, &ctx); struct ifnet *ifp; struct mbuf *m = *mp; struct inpcb *inp; struct sockaddr_in ripsrc; int appended; *mp = NULL; appended = 0; bzero(&ripsrc, sizeof(ripsrc)); ripsrc.sin_len = sizeof(ripsrc); ripsrc.sin_family = AF_INET; ripsrc.sin_addr = ctx.ip->ip_src; ifp = m->m_pkthdr.rcvif; inpi.hash = INP_PCBHASH_RAW(proto, ctx.ip->ip_src.s_addr, ctx.ip->ip_dst.s_addr, V_ripcbinfo.ipi_hashmask); while ((inp = inp_next(&inpi)) != NULL) { INP_RLOCK_ASSERT(inp); if (jailed_without_vnet(inp->inp_cred) && prison_check_ip4(inp->inp_cred, &ctx.ip->ip_dst) != 0) { /* * XXX: If faddr was bound to multicast group, * jailed raw socket will drop datagram. */ continue; } appended += rip_append(inp, ctx.ip, m, &ripsrc); } inpi.hash = 0; inpi.match = rip_inp_match2; MPASS(inpi.inp == NULL); while ((inp = inp_next(&inpi)) != NULL) { INP_RLOCK_ASSERT(inp); if (jailed_without_vnet(inp->inp_cred) && !IN_MULTICAST(ntohl(ctx.ip->ip_dst.s_addr)) && prison_check_ip4(inp->inp_cred, &ctx.ip->ip_dst) != 0) /* * Allow raw socket in jail to receive multicast; * assume process had PRIV_NETINET_RAW at attach, * and fall through into normal filter path if so. */ continue; /* * If this raw socket has multicast state, and we * have received a multicast, check if this socket * should receive it, as multicast filtering is now * the responsibility of the transport layer. */ if (inp->inp_moptions != NULL && IN_MULTICAST(ntohl(ctx.ip->ip_dst.s_addr))) { /* * If the incoming datagram is for IGMP, allow it * through unconditionally to the raw socket. * * In the case of IGMPv2, we may not have explicitly * joined the group, and may have set IFF_ALLMULTI * on the interface. imo_multi_filter() may discard * control traffic we actually need to see. * * Userland multicast routing daemons should continue * filter the control traffic appropriately. */ int blocked; blocked = MCAST_PASS; if (proto != IPPROTO_IGMP) { struct sockaddr_in group; bzero(&group, sizeof(struct sockaddr_in)); group.sin_len = sizeof(struct sockaddr_in); group.sin_family = AF_INET; group.sin_addr = ctx.ip->ip_dst; blocked = imo_multi_filter(inp->inp_moptions, ifp, (struct sockaddr *)&group, (struct sockaddr *)&ripsrc); } if (blocked != MCAST_PASS) { IPSTAT_INC(ips_notmember); continue; } } appended += rip_append(inp, ctx.ip, m, &ripsrc); } if (appended == 0 && ip_protox[ctx.ip->ip_p] == rip_input) { IPSTAT_INC(ips_noproto); IPSTAT_DEC(ips_delivered); icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL, 0, 0); } else m_freem(m); return (IPPROTO_DONE); } /* * Generate IP header and pass packet to ip_output. Tack on options user may * have setup with control call. */ static int rip_send(struct socket *so, int pruflags, struct mbuf *m, struct sockaddr *nam, struct mbuf *control, struct thread *td) { struct epoch_tracker et; struct ip *ip; struct inpcb *inp; in_addr_t *dst; int error, flags, cnt, hlen; u_char opttype, optlen, *cp; inp = sotoinpcb(so); KASSERT(inp != NULL, ("rip_send: inp == NULL")); if (control != NULL) { m_freem(control); control = NULL; } if (so->so_state & SS_ISCONNECTED) { if (nam) { error = EISCONN; m_freem(m); return (error); } dst = &inp->inp_faddr.s_addr; } else { if (nam == NULL) error = ENOTCONN; else if (nam->sa_family != AF_INET) error = EAFNOSUPPORT; else if (nam->sa_len != sizeof(struct sockaddr_in)) error = EINVAL; else error = 0; if (error != 0) { m_freem(m); return (error); } dst = &((struct sockaddr_in *)nam)->sin_addr.s_addr; } flags = ((so->so_options & SO_DONTROUTE) ? IP_ROUTETOIF : 0) | IP_ALLOWBROADCAST; /* * If the user handed us a complete IP packet, use it. Otherwise, * allocate an mbuf for a header and fill it in. */ if ((inp->inp_flags & INP_HDRINCL) == 0) { if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) { m_freem(m); return(EMSGSIZE); } M_PREPEND(m, sizeof(struct ip), M_NOWAIT); if (m == NULL) return(ENOBUFS); INP_RLOCK(inp); ip = mtod(m, struct ip *); ip->ip_tos = inp->inp_ip_tos; if (inp->inp_flags & INP_DONTFRAG) ip->ip_off = htons(IP_DF); else ip->ip_off = htons(0); ip->ip_p = inp->inp_ip_p; ip->ip_len = htons(m->m_pkthdr.len); ip->ip_src = inp->inp_laddr; ip->ip_dst.s_addr = *dst; #ifdef ROUTE_MPATH if (CALC_FLOWID_OUTBOUND) { uint32_t hash_type, hash_val; hash_val = fib4_calc_software_hash(ip->ip_src, ip->ip_dst, 0, 0, ip->ip_p, &hash_type); m->m_pkthdr.flowid = hash_val; M_HASHTYPE_SET(m, hash_type); flags |= IP_NODEFAULTFLOWID; } #endif if (jailed(inp->inp_cred)) { /* * prison_local_ip4() would be good enough but would * let a source of INADDR_ANY pass, which we do not * want to see from jails. */ if (ip->ip_src.s_addr == INADDR_ANY) { NET_EPOCH_ENTER(et); error = in_pcbladdr(inp, &ip->ip_dst, &ip->ip_src, inp->inp_cred); NET_EPOCH_EXIT(et); } else { error = prison_local_ip4(inp->inp_cred, &ip->ip_src); } if (error != 0) { INP_RUNLOCK(inp); m_freem(m); return (error); } } ip->ip_ttl = inp->inp_ip_ttl; } else { if (m->m_pkthdr.len > IP_MAXPACKET) { m_freem(m); return (EMSGSIZE); } if (m->m_pkthdr.len < sizeof(*ip)) { m_freem(m); return (EINVAL); } m = m_pullup(m, sizeof(*ip)); if (m == NULL) return (ENOMEM); ip = mtod(m, struct ip *); hlen = ip->ip_hl << 2; if (m->m_len < hlen) { m = m_pullup(m, hlen); if (m == NULL) return (EINVAL); ip = mtod(m, struct ip *); } #ifdef ROUTE_MPATH if (CALC_FLOWID_OUTBOUND) { uint32_t hash_type, hash_val; hash_val = fib4_calc_software_hash(ip->ip_dst, ip->ip_src, 0, 0, ip->ip_p, &hash_type); m->m_pkthdr.flowid = hash_val; M_HASHTYPE_SET(m, hash_type); flags |= IP_NODEFAULTFLOWID; } #endif INP_RLOCK(inp); /* * Don't allow both user specified and setsockopt options, * and don't allow packet length sizes that will crash. */ if ((hlen < sizeof (*ip)) || ((hlen > sizeof (*ip)) && inp->inp_options) || (ntohs(ip->ip_len) != m->m_pkthdr.len)) { INP_RUNLOCK(inp); m_freem(m); return (EINVAL); } error = prison_check_ip4(inp->inp_cred, &ip->ip_src); if (error != 0) { INP_RUNLOCK(inp); m_freem(m); return (error); } /* * Don't allow IP options which do not have the required * structure as specified in section 3.1 of RFC 791 on * pages 15-23. */ cp = (u_char *)(ip + 1); cnt = hlen - sizeof (struct ip); for (; cnt > 0; cnt -= optlen, cp += optlen) { opttype = cp[IPOPT_OPTVAL]; if (opttype == IPOPT_EOL) break; if (opttype == IPOPT_NOP) { optlen = 1; continue; } if (cnt < IPOPT_OLEN + sizeof(u_char)) { INP_RUNLOCK(inp); m_freem(m); return (EINVAL); } optlen = cp[IPOPT_OLEN]; if (optlen < IPOPT_OLEN + sizeof(u_char) || optlen > cnt) { INP_RUNLOCK(inp); m_freem(m); return (EINVAL); } } /* * This doesn't allow application to specify ID of zero, * but we got this limitation from the beginning of history. */ if (ip->ip_id == 0) ip_fillid(ip); /* * XXX prevent ip_output from overwriting header fields. */ flags |= IP_RAWOUTPUT; IPSTAT_INC(ips_rawout); } if (inp->inp_flags & INP_ONESBCAST) flags |= IP_SENDONES; #ifdef MAC mac_inpcb_create_mbuf(inp, m); #endif NET_EPOCH_ENTER(et); error = ip_output(m, inp->inp_options, NULL, flags, inp->inp_moptions, inp); NET_EPOCH_EXIT(et); INP_RUNLOCK(inp); return (error); } /* * Raw IP socket option processing. * * IMPORTANT NOTE regarding access control: Traditionally, raw sockets could * only be created by a privileged process, and as such, socket option * operations to manage system properties on any raw socket were allowed to * take place without explicit additional access control checks. However, * raw sockets can now also be created in jail(), and therefore explicit * checks are now required. Likewise, raw sockets can be used by a process * after it gives up privilege, so some caution is required. For options * passed down to the IP layer via ip_ctloutput(), checks are assumed to be * performed in ip_ctloutput() and therefore no check occurs here. * Unilaterally checking priv_check() here breaks normal IP socket option * operations on raw sockets. * * When adding new socket options here, make sure to add access control * checks here as necessary. * * XXX-BZ inp locking? */ int rip_ctloutput(struct socket *so, struct sockopt *sopt) { struct inpcb *inp = sotoinpcb(so); int error, optval; if (sopt->sopt_level != IPPROTO_IP) { if ((sopt->sopt_level == SOL_SOCKET) && (sopt->sopt_name == SO_SETFIB)) { inp->inp_inc.inc_fibnum = so->so_fibnum; return (0); } return (EINVAL); } error = 0; switch (sopt->sopt_dir) { case SOPT_GET: switch (sopt->sopt_name) { case IP_HDRINCL: optval = inp->inp_flags & INP_HDRINCL; error = sooptcopyout(sopt, &optval, sizeof optval); break; case IP_FW3: /* generic ipfw v.3 functions */ case IP_FW_ADD: /* ADD actually returns the body... */ case IP_FW_GET: case IP_FW_TABLE_GETSIZE: case IP_FW_TABLE_LIST: case IP_FW_NAT_GET_CONFIG: case IP_FW_NAT_GET_LOG: if (V_ip_fw_ctl_ptr != NULL) error = V_ip_fw_ctl_ptr(sopt); else error = ENOPROTOOPT; break; case IP_DUMMYNET3: /* generic dummynet v.3 functions */ case IP_DUMMYNET_GET: if (ip_dn_ctl_ptr != NULL) error = ip_dn_ctl_ptr(sopt); else error = ENOPROTOOPT; break ; case MRT_INIT: case MRT_DONE: case MRT_ADD_VIF: case MRT_DEL_VIF: case MRT_ADD_MFC: case MRT_DEL_MFC: case MRT_VERSION: case MRT_ASSERT: case MRT_API_SUPPORT: case MRT_API_CONFIG: case MRT_ADD_BW_UPCALL: case MRT_DEL_BW_UPCALL: error = priv_check(curthread, PRIV_NETINET_MROUTE); if (error != 0) return (error); error = ip_mrouter_get ? ip_mrouter_get(so, sopt) : EOPNOTSUPP; break; default: error = ip_ctloutput(so, sopt); break; } break; case SOPT_SET: switch (sopt->sopt_name) { case IP_HDRINCL: error = sooptcopyin(sopt, &optval, sizeof optval, sizeof optval); if (error) break; if (optval) inp->inp_flags |= INP_HDRINCL; else inp->inp_flags &= ~INP_HDRINCL; break; case IP_FW3: /* generic ipfw v.3 functions */ case IP_FW_ADD: case IP_FW_DEL: case IP_FW_FLUSH: case IP_FW_ZERO: case IP_FW_RESETLOG: case IP_FW_TABLE_ADD: case IP_FW_TABLE_DEL: case IP_FW_TABLE_FLUSH: case IP_FW_NAT_CFG: case IP_FW_NAT_DEL: if (V_ip_fw_ctl_ptr != NULL) error = V_ip_fw_ctl_ptr(sopt); else error = ENOPROTOOPT; break; case IP_DUMMYNET3: /* generic dummynet v.3 functions */ case IP_DUMMYNET_CONFIGURE: case IP_DUMMYNET_DEL: case IP_DUMMYNET_FLUSH: if (ip_dn_ctl_ptr != NULL) error = ip_dn_ctl_ptr(sopt); else error = ENOPROTOOPT ; break ; case IP_RSVP_ON: error = priv_check(curthread, PRIV_NETINET_MROUTE); if (error != 0) return (error); error = ip_rsvp_init(so); break; case IP_RSVP_OFF: error = priv_check(curthread, PRIV_NETINET_MROUTE); if (error != 0) return (error); error = ip_rsvp_done(); break; case IP_RSVP_VIF_ON: case IP_RSVP_VIF_OFF: error = priv_check(curthread, PRIV_NETINET_MROUTE); if (error != 0) return (error); error = ip_rsvp_vif ? ip_rsvp_vif(so, sopt) : EINVAL; break; case MRT_INIT: case MRT_DONE: case MRT_ADD_VIF: case MRT_DEL_VIF: case MRT_ADD_MFC: case MRT_DEL_MFC: case MRT_VERSION: case MRT_ASSERT: case MRT_API_SUPPORT: case MRT_API_CONFIG: case MRT_ADD_BW_UPCALL: case MRT_DEL_BW_UPCALL: error = priv_check(curthread, PRIV_NETINET_MROUTE); if (error != 0) return (error); error = ip_mrouter_set ? ip_mrouter_set(so, sopt) : EOPNOTSUPP; break; default: error = ip_ctloutput(so, sopt); break; } break; } return (error); } void rip_ctlinput(int cmd, struct sockaddr *sa, void *vip) { switch (cmd) { #if defined(IPSEC) || defined(IPSEC_SUPPORT) case PRC_MSGSIZE: if (IPSEC_ENABLED(ipv4)) IPSEC_CTLINPUT(ipv4, cmd, sa, vip); break; #endif } } static int rip_attach(struct socket *so, int proto, struct thread *td) { struct inpcb *inp; int error; inp = sotoinpcb(so); KASSERT(inp == NULL, ("rip_attach: inp != NULL")); error = priv_check(td, PRIV_NETINET_RAW); if (error) return (error); if (proto >= IPPROTO_MAX || proto < 0) return EPROTONOSUPPORT; error = soreserve(so, rip_sendspace, rip_recvspace); if (error) return (error); error = in_pcballoc(so, &V_ripcbinfo); if (error) return (error); inp = (struct inpcb *)so->so_pcb; inp->inp_ip_p = proto; inp->inp_ip_ttl = V_ip_defttl; INP_HASH_WLOCK(&V_ripcbinfo); rip_inshash(inp); INP_HASH_WUNLOCK(&V_ripcbinfo); INP_WUNLOCK(inp); return (0); } static void rip_detach(struct socket *so) { struct inpcb *inp; inp = sotoinpcb(so); KASSERT(inp != NULL, ("rip_detach: inp == NULL")); KASSERT(inp->inp_faddr.s_addr == INADDR_ANY, ("rip_detach: not closed")); /* Disable mrouter first */ if (so == V_ip_mrouter && ip_mrouter_done) ip_mrouter_done(); INP_WLOCK(inp); INP_HASH_WLOCK(&V_ripcbinfo); rip_delhash(inp); INP_HASH_WUNLOCK(&V_ripcbinfo); if (ip_rsvp_force_done) ip_rsvp_force_done(so); if (so == V_ip_rsvpd) ip_rsvp_done(); in_pcbdetach(inp); in_pcbfree(inp); } static void rip_dodisconnect(struct socket *so, struct inpcb *inp) { struct inpcbinfo *pcbinfo; pcbinfo = inp->inp_pcbinfo; INP_WLOCK(inp); INP_HASH_WLOCK(pcbinfo); rip_delhash(inp); inp->inp_faddr.s_addr = INADDR_ANY; rip_inshash(inp); INP_HASH_WUNLOCK(pcbinfo); SOCK_LOCK(so); so->so_state &= ~SS_ISCONNECTED; SOCK_UNLOCK(so); INP_WUNLOCK(inp); } static void rip_abort(struct socket *so) { struct inpcb *inp; inp = sotoinpcb(so); KASSERT(inp != NULL, ("rip_abort: inp == NULL")); rip_dodisconnect(so, inp); } static void rip_close(struct socket *so) { struct inpcb *inp; inp = sotoinpcb(so); KASSERT(inp != NULL, ("rip_close: inp == NULL")); rip_dodisconnect(so, inp); } static int rip_disconnect(struct socket *so) { struct inpcb *inp; if ((so->so_state & SS_ISCONNECTED) == 0) return (ENOTCONN); inp = sotoinpcb(so); KASSERT(inp != NULL, ("rip_disconnect: inp == NULL")); rip_dodisconnect(so, inp); return (0); } static int rip_bind(struct socket *so, struct sockaddr *nam, struct thread *td) { struct sockaddr_in *addr = (struct sockaddr_in *)nam; struct inpcb *inp; int error; if (nam->sa_family != AF_INET) return (EAFNOSUPPORT); if (nam->sa_len != sizeof(*addr)) return (EINVAL); error = prison_check_ip4(td->td_ucred, &addr->sin_addr); if (error != 0) return (error); inp = sotoinpcb(so); KASSERT(inp != NULL, ("rip_bind: inp == NULL")); if (CK_STAILQ_EMPTY(&V_ifnet) || (addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK) || (addr->sin_addr.s_addr && (inp->inp_flags & INP_BINDANY) == 0 && ifa_ifwithaddr_check((struct sockaddr *)addr) == 0)) return (EADDRNOTAVAIL); INP_WLOCK(inp); INP_HASH_WLOCK(&V_ripcbinfo); rip_delhash(inp); inp->inp_laddr = addr->sin_addr; rip_inshash(inp); INP_HASH_WUNLOCK(&V_ripcbinfo); INP_WUNLOCK(inp); return (0); } static int rip_connect(struct socket *so, struct sockaddr *nam, struct thread *td) { struct sockaddr_in *addr = (struct sockaddr_in *)nam; struct inpcb *inp; if (nam->sa_len != sizeof(*addr)) return (EINVAL); if (CK_STAILQ_EMPTY(&V_ifnet)) return (EADDRNOTAVAIL); if (addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK) return (EAFNOSUPPORT); inp = sotoinpcb(so); KASSERT(inp != NULL, ("rip_connect: inp == NULL")); INP_WLOCK(inp); INP_HASH_WLOCK(&V_ripcbinfo); rip_delhash(inp); inp->inp_faddr = addr->sin_addr; rip_inshash(inp); INP_HASH_WUNLOCK(&V_ripcbinfo); soisconnected(so); INP_WUNLOCK(inp); return (0); } static int rip_shutdown(struct socket *so) { struct inpcb *inp; inp = sotoinpcb(so); KASSERT(inp != NULL, ("rip_shutdown: inp == NULL")); INP_WLOCK(inp); socantsendmore(so); INP_WUNLOCK(inp); return (0); } #endif /* INET */ static int rip_pcblist(SYSCTL_HANDLER_ARGS) { struct inpcb_iterator inpi = INP_ALL_ITERATOR(&V_ripcbinfo, INPLOOKUP_RLOCKPCB); struct xinpgen xig; struct inpcb *inp; int error; if (req->newptr != 0) return (EPERM); if (req->oldptr == 0) { int n; n = V_ripcbinfo.ipi_count; n += imax(n / 8, 10); req->oldidx = 2 * (sizeof xig) + n * sizeof(struct xinpcb); return (0); } if ((error = sysctl_wire_old_buffer(req, 0)) != 0) return (error); bzero(&xig, sizeof(xig)); xig.xig_len = sizeof xig; xig.xig_count = V_ripcbinfo.ipi_count; xig.xig_gen = V_ripcbinfo.ipi_gencnt; xig.xig_sogen = so_gencnt; error = SYSCTL_OUT(req, &xig, sizeof xig); if (error) return (error); while ((inp = inp_next(&inpi)) != NULL) { if (inp->inp_gencnt <= xig.xig_gen && cr_canseeinpcb(req->td->td_ucred, inp) == 0) { struct xinpcb xi; in_pcbtoxinpcb(inp, &xi); error = SYSCTL_OUT(req, &xi, sizeof xi); if (error) { INP_RUNLOCK(inp); break; } } } if (!error) { /* * Give the user an updated idea of our state. If the * generation differs from what we told her before, she knows * that something happened while we were processing this * request, and it might be necessary to retry. */ xig.xig_gen = V_ripcbinfo.ipi_gencnt; xig.xig_sogen = so_gencnt; xig.xig_count = V_ripcbinfo.ipi_count; error = SYSCTL_OUT(req, &xig, sizeof xig); } return (error); } SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, rip_pcblist, "S,xinpcb", "List of active raw IP sockets"); #ifdef INET struct protosw rip_protosw = { .pr_type = SOCK_RAW, .pr_flags = PR_ATOMIC|PR_ADDR, .pr_ctloutput = rip_ctloutput, .pr_abort = rip_abort, .pr_attach = rip_attach, .pr_bind = rip_bind, .pr_connect = rip_connect, .pr_control = in_control, .pr_detach = rip_detach, .pr_disconnect = rip_disconnect, .pr_peeraddr = in_getpeeraddr, .pr_send = rip_send, .pr_shutdown = rip_shutdown, .pr_sockaddr = in_getsockaddr, .pr_sosetlabel = in_pcbsosetlabel, .pr_close = rip_close }; #endif /* INET */