diff options
author | ae <ae@FreeBSD.org> | 2014-01-09 15:38:28 +0000 |
---|---|---|
committer | ae <ae@FreeBSD.org> | 2014-01-09 15:38:28 +0000 |
commit | 15b36ec52387f6fec340336d88fafd19c1e4d1c9 (patch) | |
tree | fc1ab9010a3fec48d8ae0b640940b65e6c3b7b24 /sys/netinet6/ip6_mroute.c | |
parent | d2fc0c7e445fabe4014dd4256a9cccff649da738 (diff) | |
download | FreeBSD-src-15b36ec52387f6fec340336d88fafd19c1e4d1c9.zip FreeBSD-src-15b36ec52387f6fec340336d88fafd19c1e4d1c9.tar.gz |
Remove extra nesting from X_ip6_mforward() function.
Also remove disabled definitions from ip6_mroute.h.
PR: 185148
Sponsored by: Yandex LLC
Diffstat (limited to 'sys/netinet6/ip6_mroute.c')
-rw-r--r-- | sys/netinet6/ip6_mroute.c | 306 |
1 files changed, 146 insertions, 160 deletions
diff --git a/sys/netinet6/ip6_mroute.c b/sys/netinet6/ip6_mroute.c index 271fb85..76412b9 100644 --- a/sys/netinet6/ip6_mroute.c +++ b/sys/netinet6/ip6_mroute.c @@ -1044,11 +1044,19 @@ socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src) int X_ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) { + struct rtdetq *rte; + struct mbuf *mb0; struct mf6c *rt; struct mif6 *mifp; struct mbuf *mm; + u_long hash; mifi_t mifi; char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; +#ifdef UPCALL_TIMING + struct timeval tp; + + GET_TIME(tp); +#endif /* UPCALL_TIMING */ MRT6_DLOG(DEBUG_FORWARD, "src %s, dst %s, ifindex %d", ip6_sprintf(ip6bufs, &ip6->ip6_src), @@ -1096,200 +1104,178 @@ X_ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) if (rt) { MFC6_UNLOCK(); return (ip6_mdq(m, ifp, rt)); - } else { - /* - * If we don't have a route for packet's origin, - * Make a copy of the packet & - * send message to routing daemon - */ + } - struct mbuf *mb0; - struct rtdetq *rte; - u_long hash; -/* int i, npkts;*/ -#ifdef UPCALL_TIMING - struct timeval tp; + /* + * If we don't have a route for packet's origin, + * Make a copy of the packet & send message to routing daemon. + */ + MRT6STAT_INC(mrt6s_no_route); + MRT6_DLOG(DEBUG_FORWARD | DEBUG_MFC, "no rte s %s g %s", + ip6_sprintf(ip6bufs, &ip6->ip6_src), + ip6_sprintf(ip6bufd, &ip6->ip6_dst)); - GET_TIME(tp); -#endif /* UPCALL_TIMING */ + /* + * Allocate mbufs early so that we don't do extra work if we + * are just going to fail anyway. + */ + rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE6, M_NOWAIT); + if (rte == NULL) { + MFC6_UNLOCK(); + return (ENOBUFS); + } + mb0 = m_copy(m, 0, M_COPYALL); + /* + * Pullup packet header if needed before storing it, + * as other references may modify it in the meantime. + */ + if (mb0 && (M_HASCL(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) + mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); + if (mb0 == NULL) { + free(rte, M_MRTABLE6); + MFC6_UNLOCK(); + return (ENOBUFS); + } - MRT6STAT_INC(mrt6s_no_route); - MRT6_DLOG(DEBUG_FORWARD | DEBUG_MFC, "no rte s %s g %s", - ip6_sprintf(ip6bufs, &ip6->ip6_src), - ip6_sprintf(ip6bufd, &ip6->ip6_dst)); + /* is there an upcall waiting for this packet? */ + hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); + for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { + if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, + &rt->mf6c_origin.sin6_addr) && + IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, + &rt->mf6c_mcastgrp.sin6_addr) && (rt->mf6c_stall != NULL)) + break; + } - /* - * Allocate mbufs early so that we don't do extra work if we - * are just going to fail anyway. - */ - rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE6, - M_NOWAIT); - if (rte == NULL) { + if (rt == NULL) { + struct mrt6msg *im; +#ifdef MRT6_OINIT + struct omrt6msg *oim; +#endif + /* no upcall, so make a new entry */ + rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE6, M_NOWAIT); + if (rt == NULL) { + free(rte, M_MRTABLE6); + m_freem(mb0); MFC6_UNLOCK(); return (ENOBUFS); } - mb0 = m_copy(m, 0, M_COPYALL); /* - * Pullup packet header if needed before storing it, - * as other references may modify it in the meantime. + * Make a copy of the header to send to the user + * level process */ - if (mb0 && - (M_HASCL(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) - mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); - if (mb0 == NULL) { + mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); + if (mm == NULL) { free(rte, M_MRTABLE6); + m_freem(mb0); + free(rt, M_MRTABLE6); MFC6_UNLOCK(); return (ENOBUFS); } - /* is there an upcall waiting for this packet? */ - hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); - for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { - if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, - &rt->mf6c_origin.sin6_addr) && - IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, - &rt->mf6c_mcastgrp.sin6_addr) && - (rt->mf6c_stall != NULL)) - break; - } - - if (rt == NULL) { - struct mrt6msg *im; -#ifdef MRT6_OINIT - struct omrt6msg *oim; -#endif - - /* no upcall, so make a new entry */ - rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE6, - M_NOWAIT); - if (rt == NULL) { - free(rte, M_MRTABLE6); - m_freem(mb0); - MFC6_UNLOCK(); - return (ENOBUFS); - } - /* - * Make a copy of the header to send to the user - * level process - */ - mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); - - if (mm == NULL) { - free(rte, M_MRTABLE6); - m_freem(mb0); - free(rt, M_MRTABLE6); - MFC6_UNLOCK(); - return (ENOBUFS); - } - - /* - * Send message to routing daemon - */ - sin6.sin6_addr = ip6->ip6_src; - - im = NULL; + /* + * Send message to routing daemon + */ + sin6.sin6_addr = ip6->ip6_src; + im = NULL; #ifdef MRT6_OINIT - oim = NULL; + oim = NULL; #endif - switch (V_ip6_mrouter_ver) { + switch (V_ip6_mrouter_ver) { #ifdef MRT6_OINIT - case MRT6_OINIT: - oim = mtod(mm, struct omrt6msg *); - oim->im6_msgtype = MRT6MSG_NOCACHE; - oim->im6_mbz = 0; - break; + case MRT6_OINIT: + oim = mtod(mm, struct omrt6msg *); + oim->im6_msgtype = MRT6MSG_NOCACHE; + oim->im6_mbz = 0; + break; #endif - case MRT6_INIT: - im = mtod(mm, struct mrt6msg *); - im->im6_msgtype = MRT6MSG_NOCACHE; - im->im6_mbz = 0; - break; - default: - free(rte, M_MRTABLE6); - m_freem(mb0); - free(rt, M_MRTABLE6); - MFC6_UNLOCK(); - return (EINVAL); - } - - MRT6_DLOG(DEBUG_FORWARD, - "getting the iif info in the kernel"); + case MRT6_INIT: + im = mtod(mm, struct mrt6msg *); + im->im6_msgtype = MRT6MSG_NOCACHE; + im->im6_mbz = 0; + break; + default: + free(rte, M_MRTABLE6); + m_freem(mb0); + free(rt, M_MRTABLE6); + MFC6_UNLOCK(); + return (EINVAL); + } - for (mifp = mif6table, mifi = 0; - mifi < nummifs && mifp->m6_ifp != ifp; - mifp++, mifi++) + MRT6_DLOG(DEBUG_FORWARD, "getting the iif info in the kernel"); + for (mifp = mif6table, mifi = 0; + mifi < nummifs && mifp->m6_ifp != ifp; mifp++, mifi++) ; - switch (V_ip6_mrouter_ver) { + switch (V_ip6_mrouter_ver) { #ifdef MRT6_OINIT - case MRT6_OINIT: - oim->im6_mif = mifi; - break; + case MRT6_OINIT: + oim->im6_mif = mifi; + break; #endif - case MRT6_INIT: - im->im6_mif = mifi; - break; - } + case MRT6_INIT: + im->im6_mif = mifi; + break; + } - if (socket_send(V_ip6_mrouter, mm, &sin6) < 0) { - log(LOG_WARNING, "ip6_mforward: ip6_mrouter " - "socket queue full\n"); - MRT6STAT_INC(mrt6s_upq_sockfull); + if (socket_send(V_ip6_mrouter, mm, &sin6) < 0) { + log(LOG_WARNING, "ip6_mforward: ip6_mrouter " + "socket queue full\n"); + MRT6STAT_INC(mrt6s_upq_sockfull); + free(rte, M_MRTABLE6); + m_freem(mb0); + free(rt, M_MRTABLE6); + MFC6_UNLOCK(); + return (ENOBUFS); + } + + MRT6STAT_INC(mrt6s_upcalls); + + /* insert new entry at head of hash chain */ + bzero(rt, sizeof(*rt)); + rt->mf6c_origin.sin6_family = AF_INET6; + rt->mf6c_origin.sin6_len = sizeof(struct sockaddr_in6); + rt->mf6c_origin.sin6_addr = ip6->ip6_src; + rt->mf6c_mcastgrp.sin6_family = AF_INET6; + rt->mf6c_mcastgrp.sin6_len = sizeof(struct sockaddr_in6); + rt->mf6c_mcastgrp.sin6_addr = ip6->ip6_dst; + rt->mf6c_expire = UPCALL_EXPIRE; + n6expire[hash]++; + rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; + + /* link into table */ + rt->mf6c_next = mf6ctable[hash]; + mf6ctable[hash] = rt; + /* Add this entry to the end of the queue */ + rt->mf6c_stall = rte; + } else { + /* determine if q has overflowed */ + struct rtdetq **p; + int npkts = 0; + + for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) + if (++npkts > MAX_UPQ6) { + MRT6STAT_INC(mrt6s_upq_ovflw); free(rte, M_MRTABLE6); m_freem(mb0); - free(rt, M_MRTABLE6); MFC6_UNLOCK(); - return (ENOBUFS); + return (0); } - MRT6STAT_INC(mrt6s_upcalls); - - /* insert new entry at head of hash chain */ - bzero(rt, sizeof(*rt)); - rt->mf6c_origin.sin6_family = AF_INET6; - rt->mf6c_origin.sin6_len = sizeof(struct sockaddr_in6); - rt->mf6c_origin.sin6_addr = ip6->ip6_src; - rt->mf6c_mcastgrp.sin6_family = AF_INET6; - rt->mf6c_mcastgrp.sin6_len = sizeof(struct sockaddr_in6); - rt->mf6c_mcastgrp.sin6_addr = ip6->ip6_dst; - rt->mf6c_expire = UPCALL_EXPIRE; - n6expire[hash]++; - rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; - - /* link into table */ - rt->mf6c_next = mf6ctable[hash]; - mf6ctable[hash] = rt; - /* Add this entry to the end of the queue */ - rt->mf6c_stall = rte; - } else { - /* determine if q has overflowed */ - struct rtdetq **p; - int npkts = 0; - - for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) - if (++npkts > MAX_UPQ6) { - MRT6STAT_INC(mrt6s_upq_ovflw); - free(rte, M_MRTABLE6); - m_freem(mb0); - MFC6_UNLOCK(); - return (0); - } - - /* Add this entry to the end of the queue */ - *p = rte; - } + /* Add this entry to the end of the queue */ + *p = rte; + } - rte->next = NULL; - rte->m = mb0; - rte->ifp = ifp; + rte->next = NULL; + rte->m = mb0; + rte->ifp = ifp; #ifdef UPCALL_TIMING - rte->t = tp; + rte->t = tp; #endif /* UPCALL_TIMING */ - MFC6_UNLOCK(); + MFC6_UNLOCK(); - return (0); - } + return (0); } /* |