| /*- |
| * 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. |
| * 4. 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 <sys/bsd_cdefs.h> |
| //__FBSDID("$FreeBSD$"); |
| |
| #include "bsd_opt_inet6.h" |
| #include "bsd_opt_ipsec.h" |
| |
| #include <sys/bsd_param.h> |
| //#include <sys/bsd_jail.h> |
| #include <sys/bsd_kernel.h> |
| #include <sys/bsd_lock.h> |
| #include <sys/bsd_malloc.h> |
| #include <sys/bsd_mbuf.h> |
| //#include <sys/bsd_priv.h> |
| ////#include <sys/bsd_proc.h> |
| #include <sys/bsd_protosw.h> |
| #include <sys/bsd_rwlock.h> |
| //#include <sys/bsd_signalvar.h> |
| #include <sys/bsd_socket.h> |
| #include <sys/bsd_socketvar.h> |
| //#include <sys/bsd_sx.h> |
| //baoyg//#include <sys/bsd_sysctl.h> |
| #include <sys/bsd_systm.h> |
| |
| #include <vm/bsd_uma.h> |
| |
| #include <net/bsd_if.h> |
| #include <net/bsd_route.h> |
| #include <net/bsd_vnet.h> |
| |
| #include <netinet/bsd_in.h> |
| #include <netinet/bsd_in_systm.h> |
| #include <netinet/bsd_in_pcb.h> |
| #include <netinet/bsd_in_var.h> |
| #include <netinet/bsd_ip.h> |
| #include <netinet/bsd_ip_var.h> |
| #include <netinet/bsd_ip_mroute.h> |
| |
| #ifdef IPSEC |
| #include <netipsec/bsd_ipsec.h> |
| #endif /*IPSEC*/ |
| |
| #ifdef MAC |
| #include <security/mac/bsd_mac_framework.h> |
| #endif |
| |
| VNET_DEFINE(struct inpcbhead, ripcb); |
| VNET_DEFINE(struct inpcbinfo, ripcbinfo); |
| |
| #define V_ripcb VNET(ripcb) |
| #define V_ripcbinfo VNET(ripcbinfo) |
| |
| /* |
| * Control and data hooks for ipfw and dummynet. |
| * The data hooks are not used here but it is convenient |
| * to keep them all in one place. |
| */ |
| int (*ip_fw_ctl_ptr)(struct sockopt *) = NULL; |
| int (*ip_dn_ctl_ptr)(struct sockopt *) = NULL; |
| int (*ip_fw_chk_ptr)(struct ip_fw_args *args) = NULL; |
| int (*ip_dn_io_ptr)(struct mbuf **m, int dir, struct ip_fw_args *fwa) = NULL; |
| |
| /* |
| * 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); |
| |
| void (*rsvp_input_p)(struct mbuf *m, int off); |
| int (*ip_rsvp_vif)(struct socket *, struct sockopt *); |
| void (*ip_rsvp_force_done)(struct socket *); |
| |
| /* |
| * Hash functions |
| */ |
| |
| #define INP_PCBHASH_RAW_SIZE 256 |
| #define INP_PCBHASH_RAW(proto, laddr, faddr, mask) \ |
| (((proto) + (laddr) + (faddr)) % (mask) + 1) |
| |
| static void |
| rip_inshash(struct inpcb *inp) |
| { |
| struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; |
| struct inpcbhead *pcbhash; |
| int hash; |
| |
| INP_INFO_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]; |
| LIST_INSERT_HEAD(pcbhash, inp, inp_hash); |
| } |
| |
| static void |
| rip_delhash(struct inpcb *inp) |
| { |
| |
| INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); |
| INP_WLOCK_ASSERT(inp); |
| |
| LIST_REMOVE(inp, inp_hash); |
| } |
| |
| /* |
| * Raw interface to IP protocol. |
| */ |
| |
| #if 0 |
| /* |
| * Initialize raw connection block q. |
| */ |
| static void |
| rip_zone_change(void *tag) |
| { |
| |
| uma_zone_set_max(V_ripcbinfo.ipi_zone, maxsockets); |
| } |
| #endif |
| |
| static int |
| rip_inpcb_init(void *mem, int size, int flags) |
| { |
| struct inpcb *inp = mem; |
| |
| INP_LOCK_INIT(inp, "inp", "rawinp"); |
| return (0); |
| } |
| |
| void |
| rip_init(void) |
| { |
| |
| INP_INFO_LOCK_INIT(&V_ripcbinfo, "rip"); |
| LIST_INIT(&V_ripcb); |
| #ifdef VIMAGE |
| V_ripcbinfo.ipi_vnet = curvnet; |
| #endif |
| V_ripcbinfo.ipi_listhead = &V_ripcb; |
| V_ripcbinfo.ipi_hashbase = |
| hashinit(INP_PCBHASH_RAW_SIZE, M_PCB, &V_ripcbinfo.ipi_hashmask); |
| V_ripcbinfo.ipi_porthashbase = |
| hashinit(1, M_PCB, &V_ripcbinfo.ipi_porthashmask); |
| V_ripcbinfo.ipi_zone = uma_zcreate("ripcb", sizeof(struct inpcb), |
| NULL, NULL, rip_inpcb_init, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); |
| uma_zone_set_max(V_ripcbinfo.ipi_zone, maxsockets); |
| // EVENTHANDLER_REGISTER(maxsockets_change, rip_zone_change, NULL, |
| // EVENTHANDLER_PRI_ANY); |
| } |
| |
| #ifdef VIMAGE |
| void |
| rip_destroy(void) |
| { |
| |
| hashdestroy(V_ripcbinfo.ipi_hashbase, M_PCB, |
| V_ripcbinfo.ipi_hashmask); |
| hashdestroy(V_ripcbinfo.ipi_porthashbase, M_PCB, |
| V_ripcbinfo.ipi_porthashmask); |
| } |
| #endif |
| |
| static int |
| rip_append(struct inpcb *last, struct ip *ip, struct mbuf *n, |
| struct sockaddr_in *ripsrc) |
| { |
| int policyfail = 0; |
| |
| INP_RLOCK_ASSERT(last); |
| |
| #ifdef IPSEC |
| /* check AH/ESP integrity. */ |
| if (ipsec4_in_reject(n, last)) { |
| policyfail = 1; |
| } |
| #endif /* IPSEC */ |
| #ifdef MAC |
| if (!policyfail && mac_inpcb_check_deliver(last, n) != 0) |
| policyfail = 1; |
| #endif |
| /* Check the minimum TTL for socket. */ |
| if (last->inp_ip_minttl && last->inp_ip_minttl > ip->ip_ttl) |
| policyfail = 1; |
| if (!policyfail) { |
| struct mbuf *opts = NULL; |
| struct socket *so; |
| |
| so = last->inp_socket; |
| //if ((last->inp_flags & INP_CONTROLOPTS) || |
| // (so->so_options & (SO_TIMESTAMP | SO_BINTIME))) |
| // ip_savecontrol(last, &opts, ip, n); |
| SOCKBUF_LOCK(&so->so_rcv); |
| if (sbappendaddr_locked(&so->so_rcv, |
| (struct sockaddr *)ripsrc, n, opts) == 0) { |
| /* should notify about lost packet */ |
| m_freem(n); |
| if (opts) |
| m_freem(opts); |
| SOCKBUF_UNLOCK(&so->so_rcv); |
| } else |
| sorwakeup_locked(so); |
| } else |
| m_freem(n); |
| return (policyfail); |
| } |
| |
| /* |
| * Setup generic address and protocol structures for raw_input routine, then |
| * pass them along with mbuf chain. |
| */ |
| void |
| rip_input(struct mbuf *m, int off) |
| { |
| struct ifnet *ifp; |
| struct ip *ip = mtod(m, struct ip *); |
| int proto = ip->ip_p; |
| struct inpcb *inp, *last; |
| struct sockaddr_in ripsrc; |
| int hash; |
| |
| bzero(&ripsrc, sizeof(ripsrc)); |
| ripsrc.sin_len = sizeof(ripsrc); |
| ripsrc.sin_family = AF_INET; |
| ripsrc.sin_addr = ip->ip_src; |
| last = NULL; |
| |
| ifp = m->m_pkthdr.rcvif; |
| |
| hash = INP_PCBHASH_RAW(proto, ip->ip_src.s_addr, |
| ip->ip_dst.s_addr, V_ripcbinfo.ipi_hashmask); |
| INP_INFO_RLOCK(&V_ripcbinfo); |
| LIST_FOREACH(inp, &V_ripcbinfo.ipi_hashbase[hash], inp_hash) { |
| if (inp->inp_ip_p != proto) |
| continue; |
| #ifdef INET6 |
| /* XXX inp locking */ |
| if ((inp->inp_vflag & INP_IPV4) == 0) |
| continue; |
| #endif |
| if (inp->inp_laddr.s_addr != ip->ip_dst.s_addr) |
| continue; |
| if (inp->inp_faddr.s_addr != ip->ip_src.s_addr) |
| continue; |
| // if (jailed(inp->inp_cred)) { |
| /* |
| * XXX: If faddr was bound to multicast group, |
| * jailed raw socket will drop datagram. |
| */ |
| // if (prison_check_ip4(inp->inp_cred, &ip->ip_dst) != 0) |
| // continue; |
| // } |
| if (last != NULL) { |
| struct mbuf *n; |
| |
| n = m_copy(m, 0, (int)M_COPYALL); |
| if (n != NULL) |
| (void) rip_append(last, ip, n, &ripsrc); |
| /* XXX count dropped packet */ |
| INP_RUNLOCK(last); |
| } |
| INP_RLOCK(inp); |
| last = inp; |
| } |
| LIST_FOREACH(inp, &V_ripcbinfo.ipi_hashbase[0], inp_hash) { |
| if (inp->inp_ip_p && inp->inp_ip_p != proto) |
| continue; |
| #ifdef INET6 |
| /* XXX inp locking */ |
| if ((inp->inp_vflag & INP_IPV4) == 0) |
| continue; |
| #endif |
| if (!in_nullhost(inp->inp_laddr) && |
| !in_hosteq(inp->inp_laddr, ip->ip_dst)) |
| continue; |
| if (!in_nullhost(inp->inp_faddr) && |
| !in_hosteq(inp->inp_faddr, ip->ip_src)) |
| continue; |
| // if (jailed(inp->inp_cred)) { |
| /* |
| * 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. |
| */ |
| // if (!IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) /*&& |
| // prison_check_ip4(inp->inp_cred, &ip->ip_dst) != 0*/) |
| // 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(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 = 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; |
| } |
| } |
| if (last != NULL) { |
| struct mbuf *n; |
| |
| n = m_copy(m, 0, (int)M_COPYALL); |
| if (n != NULL) |
| (void) rip_append(last, ip, n, &ripsrc); |
| /* XXX count dropped packet */ |
| INP_RUNLOCK(last); |
| } |
| INP_RLOCK(inp); |
| last = inp; |
| } |
| INP_INFO_RUNLOCK(&V_ripcbinfo); |
| if (last != NULL) { |
| if (rip_append(last, ip, m, &ripsrc) != 0) |
| IPSTAT_INC(ips_delivered); |
| INP_RUNLOCK(last); |
| } else { |
| m_freem(m); |
| IPSTAT_INC(ips_noproto); |
| IPSTAT_DEC(ips_delivered); |
| } |
| } |
| |
| /* |
| * Generate IP header and pass packet to ip_output. Tack on options user may |
| * have setup with control call. |
| */ |
| int |
| rip_output(struct mbuf *m, struct socket *so, u_long dst) |
| { |
| struct ip *ip; |
| int error; |
| struct inpcb *inp = sotoinpcb(so); |
| int 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_DONTWAIT); |
| 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 = IP_DF; |
| else |
| ip->ip_off = 0; |
| ip->ip_p = inp->inp_ip_p; |
| ip->ip_len = m->m_pkthdr.len; |
| ip->ip_src = inp->inp_laddr; |
| /* error = prison_get_ip4(inp->inp_cred, &ip->ip_src); |
| if (error != 0) { |
| INP_RUNLOCK(inp); |
| m_freem(m); |
| return (error); |
| }*/ |
| ip->ip_dst.s_addr = dst; |
| ip->ip_ttl = inp->inp_ip_ttl; |
| } else { |
| if (m->m_pkthdr.len > IP_MAXPACKET) { |
| m_freem(m); |
| return(EMSGSIZE); |
| } |
| INP_RLOCK(inp); |
| ip = mtod(m, struct ip *); |
| /* error = prison_check_ip4(inp->inp_cred, &ip->ip_src); |
| if (error != 0) { |
| INP_RUNLOCK(inp); |
| m_freem(m); |
| return (error); |
| }*/ |
| |
| /* |
| * Don't allow both user specified and setsockopt options, |
| * and don't allow packet length sizes that will crash. |
| */ |
| if (((ip->ip_hl != (sizeof (*ip) >> 2)) && inp->inp_options) |
| || (ip->ip_len > m->m_pkthdr.len) |
| || (ip->ip_len < (ip->ip_hl << 2))) { |
| INP_RUNLOCK(inp); |
| m_freem(m); |
| return (EINVAL); |
| } |
| if (ip->ip_id == 0) |
| ip->ip_id = ip_newid(); |
| |
| /* |
| * 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 |
| |
| error = ip_output(m, inp->inp_options, NULL, flags, |
| inp->inp_moptions, inp); |
| 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. |
| */ |
| 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 (ip_fw_ctl_ptr != NULL) |
| error = 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 (ip_fw_ctl_ptr != NULL) |
| error = 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); |
| } |
| |
| /* |
| * This function exists solely to receive the PRC_IFDOWN messages which are |
| * sent by if_down(). It looks for an ifaddr whose ifa_addr is sa, and calls |
| * in_ifadown() to remove all routes corresponding to that address. It also |
| * receives the PRC_IFUP messages from if_up() and reinstalls the interface |
| * routes. |
| */ |
| void |
| rip_ctlinput(int cmd, struct sockaddr *sa, void *vip) |
| { |
| struct in_ifaddr *ia; |
| struct ifnet *ifp; |
| int err; |
| int flags; |
| |
| switch (cmd) { |
| case PRC_IFDOWN: |
| IN_IFADDR_RLOCK(); |
| TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { |
| if (ia->ia_ifa.ifa_addr == sa |
| && (ia->ia_flags & IFA_ROUTE)) { |
| ifa_ref(&ia->ia_ifa); |
| IN_IFADDR_RUNLOCK(); |
| /* |
| * in_ifscrub kills the interface route. |
| */ |
| in_ifscrub(ia->ia_ifp, ia); |
| /* |
| * in_ifadown gets rid of all the rest of the |
| * routes. This is not quite the right thing |
| * to do, but at least if we are running a |
| * routing process they will come back. |
| */ |
| in_ifadown(&ia->ia_ifa, 0); |
| ifa_free(&ia->ia_ifa); |
| break; |
| } |
| } |
| if (ia == NULL) /* If ia matched, already unlocked. */ |
| IN_IFADDR_RUNLOCK(); |
| break; |
| |
| case PRC_IFUP: |
| IN_IFADDR_RLOCK(); |
| TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { |
| if (ia->ia_ifa.ifa_addr == sa) |
| break; |
| } |
| if (ia == NULL || (ia->ia_flags & IFA_ROUTE)) { |
| IN_IFADDR_RUNLOCK(); |
| return; |
| } |
| ifa_ref(&ia->ia_ifa); |
| IN_IFADDR_RUNLOCK(); |
| flags = RTF_UP; |
| ifp = ia->ia_ifa.ifa_ifp; |
| |
| if ((ifp->if_flags & IFF_LOOPBACK) |
| || (ifp->if_flags & IFF_POINTOPOINT)) |
| flags |= RTF_HOST; |
| |
| err = rtinit(&ia->ia_ifa, RTM_ADD, flags); |
| if (err == 0) |
| ia->ia_flags |= IFA_ROUTE; |
| err = ifa_add_loopback_route((struct ifaddr *)ia, sa); |
| ifa_free(&ia->ia_ifa); |
| break; |
| } |
| } |
| |
| u_long rip_sendspace = 9216; |
| u_long rip_recvspace = 9216; |
| /* |
| SYSCTL_ULONG(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW, |
| &rip_sendspace, 0, "Maximum outgoing raw IP datagram size"); |
| SYSCTL_ULONG(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW, |
| &rip_recvspace, 0, "Maximum space for incoming raw IP datagrams"); |
| */ |
| 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); |
| INP_INFO_WLOCK(&V_ripcbinfo); |
| error = in_pcballoc(so, &V_ripcbinfo); |
| if (error) { |
| INP_INFO_WUNLOCK(&V_ripcbinfo); |
| return (error); |
| } |
| inp = (struct inpcb *)so->so_pcb; |
| inp->inp_vflag |= INP_IPV4; |
| inp->inp_ip_p = proto; |
| inp->inp_ip_ttl = V_ip_defttl; |
| rip_inshash(inp); |
| INP_INFO_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")); |
| |
| INP_INFO_WLOCK(&V_ripcbinfo); |
| INP_WLOCK(inp); |
| rip_delhash(inp); |
| if (so == V_ip_mrouter && ip_mrouter_done) |
| ip_mrouter_done(); |
| if (ip_rsvp_force_done) |
| ip_rsvp_force_done(so); |
| if (so == V_ip_rsvpd) |
| ip_rsvp_done(); |
| in_pcbdetach(inp); |
| in_pcbfree(inp); |
| INP_INFO_WUNLOCK(&V_ripcbinfo); |
| } |
| |
| static void |
| rip_dodisconnect(struct socket *so, struct inpcb *inp) |
| { |
| |
| INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); |
| INP_WLOCK_ASSERT(inp); |
| |
| rip_delhash(inp); |
| inp->inp_faddr.s_addr = INADDR_ANY; |
| rip_inshash(inp); |
| SOCK_LOCK(so); |
| so->so_state &= ~SS_ISCONNECTED; |
| SOCK_UNLOCK(so); |
| } |
| |
| static void |
| rip_abort(struct socket *so) |
| { |
| struct inpcb *inp; |
| |
| inp = sotoinpcb(so); |
| KASSERT(inp != NULL, ("rip_abort: inp == NULL")); |
| |
| INP_INFO_WLOCK(&V_ripcbinfo); |
| INP_WLOCK(inp); |
| rip_dodisconnect(so, inp); |
| INP_WUNLOCK(inp); |
| INP_INFO_WUNLOCK(&V_ripcbinfo); |
| } |
| |
| static void |
| rip_close(struct socket *so) |
| { |
| struct inpcb *inp; |
| |
| inp = sotoinpcb(so); |
| KASSERT(inp != NULL, ("rip_close: inp == NULL")); |
| |
| INP_INFO_WLOCK(&V_ripcbinfo); |
| INP_WLOCK(inp); |
| rip_dodisconnect(so, inp); |
| INP_WUNLOCK(inp); |
| INP_INFO_WUNLOCK(&V_ripcbinfo); |
| } |
| |
| 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")); |
| |
| INP_INFO_WLOCK(&V_ripcbinfo); |
| INP_WLOCK(inp); |
| rip_dodisconnect(so, inp); |
| INP_WUNLOCK(inp); |
| INP_INFO_WUNLOCK(&V_ripcbinfo); |
| 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_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 (TAILQ_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_INFO_WLOCK(&V_ripcbinfo); |
| INP_WLOCK(inp); |
| rip_delhash(inp); |
| inp->inp_laddr = addr->sin_addr; |
| rip_inshash(inp); |
| INP_WUNLOCK(inp); |
| INP_INFO_WUNLOCK(&V_ripcbinfo); |
| 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 (TAILQ_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_INFO_WLOCK(&V_ripcbinfo); |
| INP_WLOCK(inp); |
| rip_delhash(inp); |
| inp->inp_faddr = addr->sin_addr; |
| rip_inshash(inp); |
| soisconnected(so); |
| INP_WUNLOCK(inp); |
| INP_INFO_WUNLOCK(&V_ripcbinfo); |
| 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); |
| } |
| |
| static int |
| rip_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, |
| struct mbuf *control, struct thread *td) |
| { |
| struct inpcb *inp; |
| u_long dst; |
| |
| inp = sotoinpcb(so); |
| KASSERT(inp != NULL, ("rip_send: inp == NULL")); |
| |
| /* |
| * Note: 'dst' reads below are unlocked. |
| */ |
| if (so->so_state & SS_ISCONNECTED) { |
| if (nam) { |
| m_freem(m); |
| return (EISCONN); |
| } |
| dst = inp->inp_faddr.s_addr; /* Unlocked read. */ |
| } else { |
| if (nam == NULL) { |
| m_freem(m); |
| return (ENOTCONN); |
| } |
| dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr; |
| } |
| return (rip_output(m, so, dst)); |
| } |
| /* |
| static int |
| rip_pcblist(SYSCTL_HANDLER_ARGS) |
| { |
| int error, i, n; |
| struct inpcb *inp, **inp_list; |
| inp_gen_t gencnt; |
| struct xinpgen xig; |
| |
| *//* |
| * The process of preparing the TCB list is too time-consuming and |
| * resource-intensive to repeat twice on every request. |
| *//* |
| if (req->oldptr == 0) { |
| n = V_ripcbinfo.ipi_count; |
| req->oldidx = 2 * (sizeof xig) |
| + (n + n/8) * sizeof(struct xinpcb); |
| return (0); |
| } |
| |
| if (req->newptr != 0) |
| return (EPERM); |
| |
| */ /* |
| * OK, now we're committed to doing something. |
| */ |
| /* INP_INFO_RLOCK(&V_ripcbinfo); |
| gencnt = V_ripcbinfo.ipi_gencnt; |
| n = V_ripcbinfo.ipi_count; |
| INP_INFO_RUNLOCK(&V_ripcbinfo); |
| |
| xig.xig_len = sizeof xig; |
| xig.xig_count = n; |
| xig.xig_gen = gencnt; |
| xig.xig_sogen = so_gencnt; |
| error = SYSCTL_OUT(req, &xig, sizeof xig); |
| if (error) |
| return (error); |
| |
| inp_list = bsd_malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK); |
| if (inp_list == 0) |
| return (ENOMEM); |
| |
| INP_INFO_RLOCK(&V_ripcbinfo); |
| for (inp = LIST_FIRST(V_ripcbinfo.ipi_listhead), i = 0; inp && i < n; |
| inp = LIST_NEXT(inp, inp_list)) { |
| INP_RLOCK(inp); |
| if (inp->inp_gencnt <= gencnt && |
| cr_canseeinpcb(req->td->td_ucred, inp) == 0) { |
| */ /* XXX held references? */ |
| /* inp_list[i++] = inp; |
| } |
| INP_RUNLOCK(inp); |
| } |
| INP_INFO_RUNLOCK(&V_ripcbinfo); |
| n = i; |
| |
| error = 0; |
| for (i = 0; i < n; i++) { |
| inp = inp_list[i]; |
| INP_RLOCK(inp); |
| if (inp->inp_gencnt <= gencnt) { |
| struct xinpcb xi; |
| |
| bzero(&xi, sizeof(xi)); |
| xi.xi_len = sizeof xi; |
| */ /* XXX should avoid extra copy */ |
| /* bcopy(inp, &xi.xi_inp, sizeof *inp); |
| if (inp->inp_socket) |
| sotoxsocket(inp->inp_socket, &xi.xi_socket); |
| INP_RUNLOCK(inp); |
| error = SYSCTL_OUT(req, &xi, sizeof xi); |
| } else |
| INP_RUNLOCK(inp); |
| } |
| 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. |
| */ |
| /* INP_INFO_RLOCK(&V_ripcbinfo); |
| xig.xig_gen = V_ripcbinfo.ipi_gencnt; |
| xig.xig_sogen = so_gencnt; |
| xig.xig_count = V_ripcbinfo.ipi_count; |
| INP_INFO_RUNLOCK(&V_ripcbinfo); |
| error = SYSCTL_OUT(req, &xig, sizeof xig); |
| } |
| free(inp_list, M_TEMP); |
| return (error); |
| } |
| |
| SYSCTL_PROC(_net_inet_raw, OID_AUTO *XXX*, pcblist, CTLFLAG_RD, 0, 0, |
| rip_pcblist, "S,xinpcb", "List of active raw IP sockets"); |
| */ |
| struct pr_usrreqs rip_usrreqs = { |
| .pru_abort = rip_abort, |
| .pru_attach = rip_attach, |
| .pru_bind = rip_bind, |
| .pru_connect = rip_connect, |
| .pru_control = in_control, |
| .pru_detach = rip_detach, |
| .pru_disconnect = rip_disconnect, |
| .pru_peeraddr = in_getpeeraddr, |
| .pru_send = rip_send, |
| .pru_shutdown = rip_shutdown, |
| .pru_sockaddr = in_getsockaddr, |
| .pru_sosetlabel = in_pcbsosetlabel, |
| .pru_close = rip_close, |
| }; |