protosw: cleanup protocols that existed merely to provide pr_input
Since 4.4BSD the protosw was used to implement socket types created by socket(2) syscall and at the same to demultiplex incoming IPv4 datagrams (later copied to IPv6). This story ended with78b1fc05b2
. These entries (e.g. IPPROTO_ICMP) in inetsw that were added to catch packets in ip_input(), they would also be returned by pffindproto() if user says socket(AF_INET, SOCK_RAW, IPPROTO_ICMP). Thus, for raw sockets to work correctly, all the entries were pointing at raw_usrreq differentiating only in the value of pr_protocol. With78b1fc05b2
all these entries are no longer needed, as ip_protox is independent of protosw. Any socket syscall requesting SOCK_RAW type would end up with rip_protosw. And this protosw has its pr_protocol set to 0, allowing to mark socket with any protocol. For IPv6 raw socket the change required two small fixes: o Validate user provided protocol value o Always use protocol number stored in inp in rip6_attach, instead of protosw value, which is now always 0. Differential revision: https://reviews.freebsd.org/D36380
This commit is contained in:
parent
8624f4347e
commit
61f7427f02
@ -306,32 +306,6 @@ pffindtype(int family, int type)
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return (NULL);
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return (NULL);
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}
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}
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struct protosw *
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pffindproto(int family, int protocol, int type)
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{
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struct domain *dp;
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struct protosw *pr;
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struct protosw *maybe;
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dp = pffinddomain(family);
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if (dp == NULL)
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return (NULL);
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maybe = NULL;
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for (int i = 0; i < dp->dom_nprotosw; i++) {
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if ((pr = dp->dom_protosw[i]) == NULL)
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continue;
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if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
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return (pr);
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/* XXX: raw catches all. Why? */
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if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
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pr->pr_protocol == 0 && maybe == NULL)
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maybe = pr;
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}
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return (maybe);
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}
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/*
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/*
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* The caller must make sure that the new protocol is fully set up and ready to
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* The caller must make sure that the new protocol is fully set up and ready to
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* accept requests before it is registered.
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* accept requests before it is registered.
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@ -520,11 +520,7 @@ socreate(int dom, struct socket **aso, int type, int proto,
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td->td_proc->p_comm);
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td->td_proc->p_comm);
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}
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}
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if (proto)
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prp = pffindtype(dom, type);
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prp = pffindproto(dom, proto, type);
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else
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prp = pffindtype(dom, type);
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if (prp == NULL) {
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if (prp == NULL) {
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/* No support for domain. */
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/* No support for domain. */
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if (pffinddomain(dom) == NULL)
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if (pffinddomain(dom) == NULL)
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@ -534,6 +530,8 @@ socreate(int dom, struct socket **aso, int type, int proto,
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return (EPROTOTYPE);
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return (EPROTOTYPE);
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return (EPROTONOSUPPORT);
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return (EPROTONOSUPPORT);
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}
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}
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if (prp->pr_protocol != 0 && proto != 0 && prp->pr_protocol != proto)
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return (EPROTONOSUPPORT);
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MPASS(prp->pr_attach);
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MPASS(prp->pr_attach);
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@ -543,8 +541,6 @@ socreate(int dom, struct socket **aso, int type, int proto,
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if (prison_check_af(cred, prp->pr_domain->dom_family) != 0)
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if (prison_check_af(cred, prp->pr_domain->dom_family) != 0)
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return (EPROTONOSUPPORT);
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return (EPROTONOSUPPORT);
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if (prp->pr_type != type)
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return (EPROTOTYPE);
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so = soalloc(CRED_TO_VNET(cred));
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so = soalloc(CRED_TO_VNET(cred));
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if (so == NULL)
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if (so == NULL)
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return (ENOBUFS);
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return (ENOBUFS);
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@ -94,9 +94,7 @@ __FBSDID("$FreeBSD$");
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#endif
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#endif
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/* netinet/raw_ip.c */
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/* netinet/raw_ip.c */
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extern struct protosw rip_protosw, rsvp_protosw, rawipv4_protosw,
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extern struct protosw rip_protosw;
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rawipv6_protosw, mobile_protosw, etherip_protosw, icmp_protosw,
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igmp_protosw, gre_protosw, pim_protosw, ripwild_protosw;
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/* netinet/udp_usrreq.c */
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/* netinet/udp_usrreq.c */
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extern struct protosw udp_protosw, udplite_protosw;
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extern struct protosw udp_protosw, udplite_protosw;
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@ -111,7 +109,7 @@ struct domain inetdomain = {
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#endif
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#endif
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.dom_ifattach = in_domifattach,
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.dom_ifattach = in_domifattach,
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.dom_ifdetach = in_domifdetach,
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.dom_ifdetach = in_domifdetach,
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.dom_nprotosw = 24,
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.dom_nprotosw = 14,
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.dom_protosw = {
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.dom_protosw = {
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&tcp_protosw,
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&tcp_protosw,
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&udp_protosw,
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&udp_protosw,
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@ -123,28 +121,8 @@ struct domain inetdomain = {
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#endif
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#endif
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&udplite_protosw,
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&udplite_protosw,
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&rip_protosw,
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&rip_protosw,
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/*
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* XXXGL: it is entirely possible that all below raw-based
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* protosw definitions are not needed. They could have existed
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* just to define pr_input, pr_drain, pr_*timo or PR_LASTHDR
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* flag, and were never supposed to create a special socket.
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*/
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&icmp_protosw,
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&igmp_protosw,
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&rsvp_protosw,
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&rawipv4_protosw,
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&mobile_protosw,
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ðerip_protosw,
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&gre_protosw,
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#ifdef INET6
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&rawipv6_protosw,
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#else
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NULL,
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#endif
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&pim_protosw,
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/* Spacer 8 times for loadable protocols. XXXGL: why 8? */
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/* Spacer 8 times for loadable protocols. XXXGL: why 8? */
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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&ripwild_protosw,
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},
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},
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};
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};
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@ -1068,70 +1068,22 @@ SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist,
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"List of active raw IP sockets");
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"List of active raw IP sockets");
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#ifdef INET
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#ifdef INET
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/*
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* See comment in in_proto.c containing "protosw definitions are not needed".
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*/
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#define RAW_PROTOSW \
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.pr_type = SOCK_RAW, \
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.pr_flags = PR_ATOMIC|PR_ADDR, \
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.pr_ctloutput = rip_ctloutput, \
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.pr_abort = rip_abort, \
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.pr_attach = rip_attach, \
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.pr_bind = rip_bind, \
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.pr_connect = rip_connect, \
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.pr_control = in_control, \
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.pr_detach = rip_detach, \
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.pr_disconnect = rip_disconnect, \
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.pr_peeraddr = in_getpeeraddr, \
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.pr_send = rip_send, \
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.pr_shutdown = rip_shutdown, \
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.pr_sockaddr = in_getsockaddr, \
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.pr_sosetlabel = in_pcbsosetlabel, \
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.pr_close = rip_close
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struct protosw rip_protosw = {
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struct protosw rip_protosw = {
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.pr_protocol = IPPROTO_RAW,
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.pr_type = SOCK_RAW,
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RAW_PROTOSW
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.pr_flags = PR_ATOMIC|PR_ADDR,
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};
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.pr_ctloutput = rip_ctloutput,
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struct protosw icmp_protosw = {
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.pr_abort = rip_abort,
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.pr_protocol = IPPROTO_ICMP,
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.pr_attach = rip_attach,
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RAW_PROTOSW
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.pr_bind = rip_bind,
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};
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.pr_connect = rip_connect,
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struct protosw igmp_protosw = {
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.pr_control = in_control,
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.pr_protocol = IPPROTO_IGMP,
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.pr_detach = rip_detach,
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RAW_PROTOSW
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.pr_disconnect = rip_disconnect,
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};
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.pr_peeraddr = in_getpeeraddr,
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struct protosw rsvp_protosw = {
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.pr_send = rip_send,
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.pr_protocol = IPPROTO_RSVP,
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.pr_shutdown = rip_shutdown,
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RAW_PROTOSW
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.pr_sockaddr = in_getsockaddr,
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};
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.pr_sosetlabel = in_pcbsosetlabel,
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struct protosw rawipv4_protosw = {
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.pr_close = rip_close
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.pr_protocol = IPPROTO_IPV4,
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RAW_PROTOSW
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};
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struct protosw mobile_protosw = {
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.pr_protocol = IPPROTO_MOBILE,
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RAW_PROTOSW
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};
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struct protosw etherip_protosw = {
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.pr_protocol = IPPROTO_ETHERIP,
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RAW_PROTOSW
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};
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struct protosw gre_protosw = {
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.pr_protocol = IPPROTO_GRE,
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RAW_PROTOSW
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};
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#ifdef INET6
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struct protosw rawipv6_protosw = {
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.pr_protocol = IPPROTO_IPV6,
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RAW_PROTOSW
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};
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#endif
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struct protosw pim_protosw = {
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.pr_protocol = IPPROTO_PIM,
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RAW_PROTOSW
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};
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struct protosw ripwild_protosw = {
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RAW_PROTOSW
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};
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};
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#endif /* INET */
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#endif /* INET */
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@ -122,9 +122,7 @@ __FBSDID("$FreeBSD$");
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#include <netinet6/ip6protosw.h>
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#include <netinet6/ip6protosw.h>
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/* netinet6/raw_ip6.c */
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/* netinet6/raw_ip6.c */
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extern struct protosw rip6_protosw, icmp6_protosw, dstopts6_protosw,
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extern struct protosw rip6_protosw;
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routing6_protosw, frag6_protosw, rawipv4in6_protosw, rawipv6in6_protosw,
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etherip6_protosw, gre6_protosw, pim6_protosw, rip6wild_protosw;
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/* netinet6/udp6_usrreq.c */
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/* netinet6/udp6_usrreq.c */
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extern struct protosw udp6_protosw, udplite6_protosw;
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extern struct protosw udp6_protosw, udplite6_protosw;
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@ -143,7 +141,7 @@ struct domain inet6domain = {
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.dom_ifattach = in6_domifattach,
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.dom_ifattach = in6_domifattach,
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.dom_ifdetach = in6_domifdetach,
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.dom_ifdetach = in6_domifdetach,
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.dom_ifmtu = in6_domifmtu,
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.dom_ifmtu = in6_domifmtu,
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.dom_nprotosw = 24,
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.dom_nprotosw = 14,
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.dom_protosw = {
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.dom_protosw = {
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&tcp6_protosw,
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&tcp6_protosw,
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&udp6_protosw,
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&udp6_protosw,
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@ -155,28 +153,8 @@ struct domain inet6domain = {
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#endif
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#endif
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&udplite6_protosw,
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&udplite6_protosw,
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&rip6_protosw,
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&rip6_protosw,
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/*
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* XXXGL: it is entirely possible that all below raw-based
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* protosw definitions are not needed. They could have existed
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* just to define pr_input, pr_drain, pr_*timo or PR_LASTHDR
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* flag, and were never supposed to create a special socket.
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*/
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&icmp6_protosw,
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&dstopts6_protosw,
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&routing6_protosw,
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&frag6_protosw,
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#ifdef INET
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&rawipv4in6_protosw,
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#else
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NULL,
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#endif
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&rawipv6in6_protosw,
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ðerip6_protosw,
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&gre6_protosw,
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&pim6_protosw,
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/* Spacer 8 times for loadable protocols. XXXGL: why 8? */
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/* Spacer 8 times for loadable protocols. XXXGL: why 8? */
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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&rip6wild_protosw,
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},
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},
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};
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};
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@ -424,9 +424,8 @@ rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
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if (control != NULL) {
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if (control != NULL) {
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NET_EPOCH_ENTER(et);
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NET_EPOCH_ENTER(et);
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error = ip6_setpktopts(control, &opt,
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error = ip6_setpktopts(control, &opt, inp->in6p_outputopts,
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inp->in6p_outputopts, so->so_cred,
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so->so_cred, inp->inp_ip_p);
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so->so_proto->pr_protocol);
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NET_EPOCH_EXIT(et);
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NET_EPOCH_EXIT(et);
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if (error != 0) {
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if (error != 0) {
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@ -455,7 +454,7 @@ rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
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* For an ICMPv6 packet, we should know its type and code to update
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* For an ICMPv6 packet, we should know its type and code to update
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* statistics.
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* statistics.
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*/
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*/
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if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
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if (inp->inp_ip_p == IPPROTO_ICMPV6) {
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struct icmp6_hdr *icmp6;
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struct icmp6_hdr *icmp6;
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if (m->m_len < sizeof(struct icmp6_hdr) &&
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if (m->m_len < sizeof(struct icmp6_hdr) &&
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(m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
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(m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
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@ -479,8 +478,7 @@ rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
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uint32_t hash_type, hash_val;
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uint32_t hash_type, hash_val;
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hash_val = fib6_calc_software_hash(&inp->in6p_laddr,
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hash_val = fib6_calc_software_hash(&inp->in6p_laddr,
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&dstsock->sin6_addr, 0, 0, so->so_proto->pr_protocol,
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&dstsock->sin6_addr, 0, 0, inp->inp_ip_p, &hash_type);
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&hash_type);
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inp->inp_flowid = hash_val;
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inp->inp_flowid = hash_val;
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inp->inp_flowtype = hash_type;
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inp->inp_flowtype = hash_type;
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}
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}
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@ -516,14 +514,13 @@ rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
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ip6->ip6_nxt = inp->inp_ip_p;
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ip6->ip6_nxt = inp->inp_ip_p;
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ip6->ip6_hlim = hlim;
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ip6->ip6_hlim = hlim;
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if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
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if (inp->inp_ip_p == IPPROTO_ICMPV6 || inp->in6p_cksum != -1) {
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inp->in6p_cksum != -1) {
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struct mbuf *n;
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struct mbuf *n;
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int off;
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int off;
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u_int16_t *p;
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u_int16_t *p;
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/* Compute checksum. */
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/* Compute checksum. */
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if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
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if (inp->inp_ip_p == IPPROTO_ICMPV6)
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off = offsetof(struct icmp6_hdr, icmp6_cksum);
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off = offsetof(struct icmp6_hdr, icmp6_cksum);
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else
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else
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off = inp->in6p_cksum;
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off = inp->in6p_cksum;
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@ -550,7 +547,7 @@ rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
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* them to rtadvd/rtsol.
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* them to rtadvd/rtsol.
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*/
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*/
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if ((send_sendso_input_hook != NULL) &&
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if ((send_sendso_input_hook != NULL) &&
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so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
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inp->inp_ip_p == IPPROTO_ICMPV6) {
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switch (type) {
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switch (type) {
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case ND_ROUTER_ADVERT:
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case ND_ROUTER_ADVERT:
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case ND_ROUTER_SOLICIT:
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case ND_ROUTER_SOLICIT:
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@ -565,7 +562,7 @@ rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
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NET_EPOCH_ENTER(et);
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NET_EPOCH_ENTER(et);
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error = ip6_output(m, optp, NULL, 0, inp->in6p_moptions, &oifp, inp);
|
error = ip6_output(m, optp, NULL, 0, inp->in6p_moptions, &oifp, inp);
|
||||||
NET_EPOCH_EXIT(et);
|
NET_EPOCH_EXIT(et);
|
||||||
if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
|
if (inp->inp_ip_p == IPPROTO_ICMPV6) {
|
||||||
if (oifp)
|
if (oifp)
|
||||||
icmp6_ifoutstat_inc(oifp, type, code);
|
icmp6_ifoutstat_inc(oifp, type, code);
|
||||||
ICMP6STAT_INC(icp6s_outhist[type]);
|
ICMP6STAT_INC(icp6s_outhist[type]);
|
||||||
@ -682,6 +679,8 @@ rip6_attach(struct socket *so, int proto, struct thread *td)
|
|||||||
error = priv_check(td, PRIV_NETINET_RAW);
|
error = priv_check(td, PRIV_NETINET_RAW);
|
||||||
if (error)
|
if (error)
|
||||||
return (error);
|
return (error);
|
||||||
|
if (proto >= IPPROTO_MAX || proto < 0)
|
||||||
|
return (EPROTONOSUPPORT);
|
||||||
error = soreserve(so, rip_sendspace, rip_recvspace);
|
error = soreserve(so, rip_sendspace, rip_recvspace);
|
||||||
if (error)
|
if (error)
|
||||||
return (error);
|
return (error);
|
||||||
@ -694,7 +693,7 @@ rip6_attach(struct socket *so, int proto, struct thread *td)
|
|||||||
return (error);
|
return (error);
|
||||||
}
|
}
|
||||||
inp = (struct inpcb *)so->so_pcb;
|
inp = (struct inpcb *)so->so_pcb;
|
||||||
inp->inp_ip_p = (long)proto;
|
inp->inp_ip_p = proto;
|
||||||
inp->in6p_cksum = -1;
|
inp->in6p_cksum = -1;
|
||||||
inp->in6p_icmp6filt = filter;
|
inp->in6p_icmp6filt = filter;
|
||||||
ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
|
ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
|
||||||
@ -869,66 +868,20 @@ rip6_shutdown(struct socket *so)
|
|||||||
return (0);
|
return (0);
|
||||||
}
|
}
|
||||||
|
|
||||||
/*
|
|
||||||
* See comment in in6_proto.c containing "protosw definitions are not needed".
|
|
||||||
*/
|
|
||||||
#define RAW6_PROTOSW \
|
|
||||||
.pr_type = SOCK_RAW, \
|
|
||||||
.pr_flags = PR_ATOMIC|PR_ADDR, \
|
|
||||||
.pr_ctloutput = rip6_ctloutput, \
|
|
||||||
.pr_abort = rip6_abort, \
|
|
||||||
.pr_attach = rip6_attach, \
|
|
||||||
.pr_bind = rip6_bind, \
|
|
||||||
.pr_connect = rip6_connect, \
|
|
||||||
.pr_control = in6_control, \
|
|
||||||
.pr_detach = rip6_detach, \
|
|
||||||
.pr_disconnect = rip6_disconnect, \
|
|
||||||
.pr_peeraddr = in6_getpeeraddr, \
|
|
||||||
.pr_send = rip6_send, \
|
|
||||||
.pr_shutdown = rip6_shutdown, \
|
|
||||||
.pr_sockaddr = in6_getsockaddr, \
|
|
||||||
.pr_close = rip6_close
|
|
||||||
|
|
||||||
struct protosw rip6_protosw = {
|
struct protosw rip6_protosw = {
|
||||||
.pr_protocol = IPPROTO_RAW,
|
.pr_type = SOCK_RAW,
|
||||||
RAW6_PROTOSW
|
.pr_flags = PR_ATOMIC|PR_ADDR,
|
||||||
};
|
.pr_ctloutput = rip6_ctloutput,
|
||||||
struct protosw icmp6_protosw = {
|
.pr_abort = rip6_abort,
|
||||||
.pr_protocol = IPPROTO_ICMPV6,
|
.pr_attach = rip6_attach,
|
||||||
RAW6_PROTOSW
|
.pr_bind = rip6_bind,
|
||||||
};
|
.pr_connect = rip6_connect,
|
||||||
struct protosw dstopts6_protosw = {
|
.pr_control = in6_control,
|
||||||
.pr_protocol = IPPROTO_DSTOPTS,
|
.pr_detach = rip6_detach,
|
||||||
RAW6_PROTOSW
|
.pr_disconnect = rip6_disconnect,
|
||||||
};
|
.pr_peeraddr = in6_getpeeraddr,
|
||||||
struct protosw routing6_protosw = {
|
.pr_send = rip6_send,
|
||||||
.pr_protocol = IPPROTO_ROUTING,
|
.pr_shutdown = rip6_shutdown,
|
||||||
RAW6_PROTOSW
|
.pr_sockaddr = in6_getsockaddr,
|
||||||
};
|
.pr_close = rip6_close
|
||||||
struct protosw frag6_protosw = {
|
|
||||||
.pr_protocol = IPPROTO_FRAGMENT,
|
|
||||||
RAW6_PROTOSW
|
|
||||||
};
|
|
||||||
struct protosw rawipv4in6_protosw = {
|
|
||||||
.pr_protocol = IPPROTO_IPV4,
|
|
||||||
RAW6_PROTOSW
|
|
||||||
};
|
|
||||||
struct protosw rawipv6in6_protosw = {
|
|
||||||
.pr_protocol = IPPROTO_IPV6,
|
|
||||||
RAW6_PROTOSW
|
|
||||||
};
|
|
||||||
struct protosw etherip6_protosw = {
|
|
||||||
.pr_protocol = IPPROTO_ETHERIP,
|
|
||||||
RAW6_PROTOSW
|
|
||||||
};
|
|
||||||
struct protosw gre6_protosw = {
|
|
||||||
.pr_protocol = IPPROTO_GRE,
|
|
||||||
RAW6_PROTOSW
|
|
||||||
};
|
|
||||||
struct protosw pim6_protosw = {
|
|
||||||
.pr_protocol = IPPROTO_PIM,
|
|
||||||
RAW6_PROTOSW
|
|
||||||
};
|
|
||||||
struct protosw rip6wild_protosw = {
|
|
||||||
RAW6_PROTOSW
|
|
||||||
};
|
};
|
||||||
|
@ -236,7 +236,6 @@ char *prcorequests[] = {
|
|||||||
|
|
||||||
#ifdef _KERNEL
|
#ifdef _KERNEL
|
||||||
struct domain *pffinddomain(int family);
|
struct domain *pffinddomain(int family);
|
||||||
struct protosw *pffindproto(int family, int protocol, int type);
|
|
||||||
struct protosw *pffindtype(int family, int type);
|
struct protosw *pffindtype(int family, int type);
|
||||||
int protosw_register(struct domain *, struct protosw *);
|
int protosw_register(struct domain *, struct protosw *);
|
||||||
int protosw_unregister(struct protosw *);
|
int protosw_unregister(struct protosw *);
|
||||||
|
Loading…
Reference in New Issue
Block a user