diff options
Diffstat (limited to 'sysdep')
| -rw-r--r-- | sysdep/bsd/sysio.h | 51 | ||||
| -rw-r--r-- | sysdep/linux/netlink/netlink.c | 21 | ||||
| -rw-r--r-- | sysdep/linux/sysio.h | 136 | ||||
| -rw-r--r-- | sysdep/unix/io.c | 224 |
4 files changed, 282 insertions, 150 deletions
diff --git a/sysdep/bsd/sysio.h b/sysdep/bsd/sysio.h index b0ec456..80f8f94 100644 --- a/sysdep/bsd/sysio.h +++ b/sysdep/bsd/sysio.h @@ -27,48 +27,55 @@ set_inaddr(struct in_addr * ia, ip_addr a) } static inline char * -sysio_mcast_setup(sock * s) +sysio_setup_multicast(sock *s) { - u8 zero = 0; - u8 one = 1; + struct in_addr m; + u8 zero = 0; + u8 ttl = s->ttl; - if (ipa_nonzero(s->daddr)) { + if (setsockopt(s->fd, IPPROTO_IP, IP_MULTICAST_LOOP, &zero, sizeof(zero)) < 0) + return "IP_MULTICAST_LOOP"; - if (setsockopt(s->fd, IPPROTO_IP, IP_MULTICAST_LOOP, &zero, sizeof(zero)) < 0) - return "IP_MULTICAST_LOOP"; + if (setsockopt(s->fd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl)) < 0) + return "IP_MULTICAST_TTL"; + + /* This defines where should we send _outgoing_ multicasts */ + set_inaddr(&m, s->iface->addr->ip); + if (setsockopt(s->fd, IPPROTO_IP, IP_MULTICAST_IF, &m, sizeof(m)) < 0) + return "IP_MULTICAST_IF"; - if (setsockopt(s->fd, IPPROTO_IP, IP_MULTICAST_TTL, &one, sizeof(one)) < 0) - return "IP_MULTICAST_TTL"; - } return NULL; } static inline char * -sysio_mcast_join(sock * s) +sysio_join_group(sock *s, ip_addr maddr) { - struct in_addr m; struct ip_mreq mreq; - char *err; - - set_inaddr(&m, s->iface->addr->ip ); bzero(&mreq, sizeof(mreq)); set_inaddr(&mreq.imr_interface, s->iface->addr->ip); - set_inaddr(&mreq.imr_multiaddr, s->daddr); + set_inaddr(&mreq.imr_multiaddr, maddr); /* And this one sets interface for _receiving_ multicasts from */ - if (ipa_nonzero(s->daddr) && - setsockopt(s->fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) + if (setsockopt(s->fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) return "IP_ADD_MEMBERSHIP"; + return NULL; +} - /* This defines where should we send _outgoing_ multicasts */ - if (ipa_nonzero(s->daddr) && setsockopt(s->fd, IPPROTO_IP, IP_MULTICAST_IF, &m, sizeof(m)) < 0) - return "IP_MULTICAST_IF"; +static inline char * +sysio_leave_group(sock *s, ip_addr maddr) +{ + struct ip_mreq mreq; - if (err = sysio_mcast_setup(s)) - return err; + bzero(&mreq, sizeof(mreq)); + set_inaddr(&mreq.imr_interface, s->iface->addr->ip); + set_inaddr(&mreq.imr_multiaddr, maddr); + + /* And this one sets interface for _receiving_ multicasts from */ + if (setsockopt(s->fd, IPPROTO_IP, IP_DROP_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) + return "IP_DROP_MEMBERSHIP"; return NULL; } diff --git a/sysdep/linux/netlink/netlink.c b/sysdep/linux/netlink/netlink.c index 03d4388..f45fe15 100644 --- a/sysdep/linux/netlink/netlink.c +++ b/sysdep/linux/netlink/netlink.c @@ -390,7 +390,6 @@ nl_parse_addr(struct nlmsghdr *h) else { ip_addr netmask = ipa_mkmask(ifa.pxlen); - ip_addr xbrd; ifa.prefix = ipa_and(ifa.ip, netmask); ifa.brd = ipa_or(ifa.ip, ipa_not(netmask)); #ifndef IPV6 @@ -398,6 +397,7 @@ nl_parse_addr(struct nlmsghdr *h) ifa.opposite = ipa_opposite(ifa.ip, i->ifa_prefixlen); if ((ifi->flags & IF_BROADCAST) && a[IFA_BROADCAST]) { + ip_addr xbrd; memcpy(&xbrd, RTA_DATA(a[IFA_BROADCAST]), sizeof(xbrd)); ipa_ntoh(xbrd); if (ipa_equal(xbrd, ifa.prefix) || ipa_equal(xbrd, ifa.brd)) @@ -472,6 +472,9 @@ krt_capable(rte *e) switch (a->dest) { case RTD_ROUTER: + if (ipa_has_link_scope(a->gw) && (a->iface == NULL)) + return 0; + case RTD_DEVICE: case RTD_BLACKHOLE: case RTD_UNREACHABLE: @@ -514,6 +517,11 @@ nl_send_route(struct krt_proto *p, rte *e, int new) case RTD_ROUTER: r.r.rtm_type = RTN_UNICAST; nl_add_attr_ipa(&r.h, sizeof(r), RTA_GATEWAY, a->gw); + + /* a->iface != NULL checked in krt_capable() */ + if (ipa_has_link_scope(a->gw)) + nl_add_attr_u32(&r.h, sizeof(r), RTA_OIF, a->iface->index); + break; case RTD_DEVICE: if (!a->iface) @@ -678,6 +686,7 @@ nl_parse_route(struct nlmsghdr *h, int scan) } if (a[RTA_GATEWAY]) { + struct iface *ifa = if_find_by_index(oif); neighbor *ng; ra.dest = RTD_ROUTER; memcpy(&ra.gw, RTA_DATA(a[RTA_GATEWAY]), sizeof(ra.gw)); @@ -696,15 +705,19 @@ nl_parse_route(struct nlmsghdr *h, int scan) } else { - /* standard route */ - ng = neigh_find(&p->p, &ra.gw, 0); + ng = neigh_find2(&p->p, &ra.gw, ifa, 0); if (ng && ng->scope) - ra.iface = ng->iface; + { + if (ng->iface != ifa) + log(L_WARN "KRT: Route with unexpected iface for %I/%d", net->n.prefix, net->n.pxlen); + ra.iface = ng->iface; + } else { log(L_WARN "Kernel told us to use non-neighbor %I for %I/%d", ra.gw, net->n.prefix, net->n.pxlen); return; } + } } else diff --git a/sysdep/linux/sysio.h b/sysdep/linux/sysio.h index 2fa5f0a..70d35cc 100644 --- a/sysdep/linux/sysio.h +++ b/sysdep/linux/sysio.h @@ -38,27 +38,33 @@ set_inaddr(struct in_addr *ia, ip_addr a) * ways. Horrible. */ -static inline char *sysio_mcast_setup(sock *s) + +#if defined(CONFIG_LINUX_MC_MREQ) || defined(CONFIG_LINUX_MC_MREQ_BIND) +/* + * Older kernels support only struct mreq which matches interfaces by their + * addresses and thus fails on unnumbered devices. On newer 2.0 kernels + * we can use SO_BINDTODEVICE to circumvent this problem. + */ + +#define MREQ_IFA struct in_addr +#define MREQ_GRP struct ip_mreq +static inline void fill_mreq_ifa(struct in_addr *m, struct iface *ifa, UNUSED ip_addr maddr) { - int zero = 0; + set_inaddr(m, ifa->addr->ip); +} - if (ipa_nonzero(s->daddr)) - { - if ( -#ifdef IP_DEFAULT_MULTICAST_TTL - s->ttl != IP_DEFAULT_MULTICAST_TTL && -#endif - setsockopt(s->fd, SOL_IP, IP_MULTICAST_TTL, &s->ttl, sizeof(s->ttl)) < 0) - return "IP_MULTICAST_TTL"; - if ( -#ifdef IP_DEFAULT_MULTICAST_LOOP - IP_DEFAULT_MULTICAST_LOOP && +static inline void fill_mreq_grp(struct ip_mreq *m, struct iface *ifa, ip_addr maddr) +{ + bzero(m, sizeof(*m)); +#ifdef CONFIG_LINUX_MC_MREQ_BIND + m->imr_interface.s_addr = INADDR_ANY; +#else + set_inaddr(&m->imr_interface, ifa->addr->ip); #endif - setsockopt(s->fd, SOL_IP, IP_MULTICAST_LOOP, &zero, sizeof(zero)) < 0) - return "IP_MULTICAST_LOOP"; - } - return NULL; + set_inaddr(&m->imr_multiaddr, maddr); } +#endif + #ifdef CONFIG_LINUX_MC_MREQN /* @@ -76,70 +82,78 @@ struct ip_mreqn }; #endif -static inline char *sysio_mcast_join(sock *s) +#define MREQ_IFA struct ip_mreqn +#define MREQ_GRP struct ip_mreqn +#define fill_mreq_ifa fill_mreq +#define fill_mreq_grp fill_mreq + +static inline fill_mreq(struct ip_mreqn *m, struct iface *ifa, ip_addr maddr) { - struct ip_mreqn mreq; - char *err; - struct ifreq ifr; - - if (err = sysio_mcast_setup(s)) - return err; - strcpy(ifr.ifr_name, s->iface->name); - if (setsockopt(s->fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) < 0) - return "SO_BINDTODEVICE"; - mreq.imr_ifindex = s->iface->index; - set_inaddr(&mreq.imr_address, s->iface->addr->ip); - set_inaddr(&mreq.imr_multiaddr, s->daddr); - /* This defines where should we send _outgoing_ multicasts */ - if (ipa_nonzero(s->daddr) && setsockopt(s->fd, SOL_IP, IP_MULTICAST_IF, &mreq, sizeof(mreq)) < 0) - return "IP_MULTICAST_IF"; - /* And this one sets interface for _receiving_ multicasts from */ - if (ipa_nonzero(s->saddr) && setsockopt(s->fd, SOL_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) - return "IP_ADD_MEMBERSHIP"; - return NULL; + bzero(m, sizeof(*m)); + m->imr_ifindex = ifa->index; + set_inaddr(&m->imr_address, ifa->addr->ip); + set_inaddr(&m->imr_multiaddr, maddr); } #endif -#if defined(CONFIG_LINUX_MC_MREQ) || defined(CONFIG_LINUX_MC_MREQ_BIND) -/* - * Older kernels support only struct mreq which matches interfaces by their - * addresses and thus fails on unnumbered devices. On newer 2.0 kernels - * we can use SO_BINDTODEVICE to circumvent this problem. - */ - -static inline char *sysio_mcast_join(sock *s) +static inline char * +sysio_setup_multicast(sock *s) { - struct in_addr mreq; - struct ip_mreq mreq_add; - char *err; + MREQ_IFA m; + int zero = 0; - if (err = sysio_mcast_setup(s)) - return err; - set_inaddr(&mreq, s->iface->addr->ip); -#ifdef CONFIG_LINUX_MC_MREQ_BIND + if (setsockopt(s->fd, SOL_IP, IP_MULTICAST_LOOP, &zero, sizeof(zero)) < 0) + return "IP_MULTICAST_LOOP"; + + if (setsockopt(s->fd, SOL_IP, IP_MULTICAST_TTL, &s->ttl, sizeof(s->ttl)) < 0) + return "IP_MULTICAST_TTL"; + + /* This defines where should we send _outgoing_ multicasts */ + fill_mreq_ifa(&m, s->iface, IPA_NONE); + if (setsockopt(s->fd, SOL_IP, IP_MULTICAST_IF, &m, sizeof(m)) < 0) + return "IP_MULTICAST_IF"; + +#if defined(CONFIG_LINUX_MC_MREQ_BIND) || defined(CONFIG_LINUX_MC_MREQN) { struct ifreq ifr; strcpy(ifr.ifr_name, s->iface->name); if (setsockopt(s->fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) < 0) return "SO_BINDTODEVICE"; - mreq_add.imr_interface.s_addr = INADDR_ANY; } -#else - mreq_add.imr_interface = mreq; #endif - set_inaddr(&mreq_add.imr_multiaddr, s->daddr); - /* This defines where should we send _outgoing_ multicasts */ - if (ipa_nonzero(s->daddr) && setsockopt(s->fd, SOL_IP, IP_MULTICAST_IF, &mreq, sizeof(mreq)) < 0) - return "IP_MULTICAST_IF"; + + return NULL; +} + +static inline char * +sysio_join_group(sock *s, ip_addr maddr) +{ + MREQ_GRP m; + /* And this one sets interface for _receiving_ multicasts from */ - if (ipa_nonzero(s->saddr) && setsockopt(s->fd, SOL_IP, IP_ADD_MEMBERSHIP, &mreq_add, sizeof(mreq_add)) < 0) + fill_mreq_grp(&m, s->iface, maddr); + if (setsockopt(s->fd, SOL_IP, IP_ADD_MEMBERSHIP, &m, sizeof(m)) < 0) return "IP_ADD_MEMBERSHIP"; + + return NULL; +} + +static inline char * +sysio_leave_group(sock *s, ip_addr maddr) +{ + MREQ_GRP m; + + /* And this one sets interface for _receiving_ multicasts from */ + fill_mreq_grp(&m, s->iface, maddr); + if (setsockopt(s->fd, SOL_IP, IP_DROP_MEMBERSHIP, &m, sizeof(m)) < 0) + return "IP_DROP_MEMBERSHIP"; + return NULL; } -#endif #endif + #include <linux/socket.h> #include <linux/tcp.h> diff --git a/sysdep/unix/io.c b/sysdep/unix/io.c index 330aea4..cd5c5db 100644 --- a/sysdep/unix/io.c +++ b/sysdep/unix/io.c @@ -627,6 +627,12 @@ fill_in_sockaddr(sockaddr *sa, ip_addr a, unsigned port) set_inaddr(&sa->sin6_addr, a); } +static inline void +fill_in_sockifa(sockaddr *sa, struct iface *ifa) +{ + sa->sin6_scope_id = ifa ? ifa->index : 0; +} + void get_sockaddr(struct sockaddr_in6 *sa, ip_addr *a, unsigned *port, int check) { @@ -652,6 +658,11 @@ fill_in_sockaddr(sockaddr *sa, ip_addr a, unsigned port) set_inaddr(&sa->sin_addr, a); } +static inline void +fill_in_sockifa(sockaddr *sa, struct iface *ifa) +{ +} + void get_sockaddr(struct sockaddr_in *sa, ip_addr *a, unsigned *port, int check) { @@ -670,8 +681,7 @@ sk_set_ttl_int(sock *s) { int one = 1; #ifdef IPV6 - if (s->type != SK_UDP_MC && s->type != SK_IP_MC && - setsockopt(s->fd, SOL_IPV6, IPV6_UNICAST_HOPS, &s->ttl, sizeof(s->ttl)) < 0) + if (setsockopt(s->fd, SOL_IPV6, IPV6_UNICAST_HOPS, &s->ttl, sizeof(s->ttl)) < 0) return "IPV6_UNICAST_HOPS"; #else if (setsockopt(s->fd, SOL_IP, IP_TTL, &s->ttl, sizeof(s->ttl)) < 0) @@ -768,6 +778,151 @@ sk_set_md5_auth(sock *s, ip_addr a, char *passwd) return sk_set_md5_auth_int(s, &sa, passwd); } +int +sk_set_broadcast(sock *s, int enable) +{ + if (setsockopt(s->fd, SOL_SOCKET, SO_BROADCAST, &enable, sizeof(enable)) < 0) + { + log(L_ERR "sk_set_broadcast: SO_BROADCAST: %m"); + return -1; + } + + return 0; +} + + +#ifdef IPV6 + +int +sk_set_ipv6_checksum(sock *s, int offset) +{ + if (setsockopt(s->fd, IPPROTO_IPV6, IPV6_CHECKSUM, &offset, sizeof(offset)) < 0) + { + log(L_ERR "sk_set_ipv6_checksum: IPV6_CHECKSUM: %m"); + return -1; + } + + return 0; +} + +int +sk_setup_multicast(sock *s) +{ + char *err; + int zero = 0; + int index; + + ASSERT(s->iface && s->iface->addr); + + index = s->iface->index; + if (setsockopt(s->fd, SOL_IPV6, IPV6_MULTICAST_HOPS, &s->ttl, sizeof(s->ttl)) < 0) + ERR("IPV6_MULTICAST_HOPS"); + if (setsockopt(s->fd, SOL_IPV6, IPV6_MULTICAST_LOOP, &zero, sizeof(zero)) < 0) + ERR("IPV6_MULTICAST_LOOP"); + if (setsockopt(s->fd, SOL_IPV6, IPV6_MULTICAST_IF, &index, sizeof(index)) < 0) + ERR("IPV6_MULTICAST_IF"); + + return 0; + +bad: + log(L_ERR "sk_setup_multicast: %s: %m", err); + return -1; +} + +int +sk_join_group(sock *s, ip_addr maddr) +{ + struct ipv6_mreq mreq; + + set_inaddr(&mreq.ipv6mr_multiaddr, maddr); + +#ifdef CONFIG_IPV6_GLIBC_20 + mreq.ipv6mr_ifindex = s->iface->index; +#else + mreq.ipv6mr_interface = s->iface->index; +#endif + + /* RFC 2553 says IPV6_JOIN_GROUP */ + if (setsockopt(s->fd, SOL_IPV6, IPV6_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) + { + log(L_ERR "sk_join_group: IPV6_ADD_MEMBERSHIP: %m"); + return -1; + } + + return 0; +} + +int +sk_leave_group(sock *s, ip_addr maddr) +{ + struct ipv6_mreq mreq; + + set_inaddr(&mreq.ipv6mr_multiaddr, maddr); + +#ifdef CONFIG_IPV6_GLIBC_20 + mreq.ipv6mr_ifindex = s->iface->index; +#else + mreq.ipv6mr_interface = s->iface->index; +#endif + + /* RFC 2553 says IPV6_LEAVE_GROUP */ + if (setsockopt(s->fd, SOL_IPV6, IPV6_DROP_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) + { + log(L_ERR "sk_leave_group: IPV6_DROP_MEMBERSHIP: %m"); + return -1; + } + + return 0; +} + +#else /* IPV4 */ + +int +sk_setup_multicast(sock *s) +{ + char *err; + + ASSERT(s->iface && s->iface->addr); + + if (err = sysio_setup_multicast(s)) + { + log(L_ERR "sk_setup_multicast: %s: %m", err); + return -1; + } + + return 0; +} + +int +sk_join_group(sock *s, ip_addr maddr) +{ + char *err; + + if (err = sysio_join_group(s, maddr)) + { + log(L_ERR "sk_join_group: %s: %m", err); + return -1; + } + + return 0; +} + +int +sk_leave_group(sock *s, ip_addr maddr) +{ + char *err; + + if (err = sysio_leave_group(s, maddr)) + { + log(L_ERR "sk_leave_group: %s: %m", err); + return -1; + } + + return 0; +} + +#endif + static void sk_tcp_connected(sock *s) @@ -841,11 +996,9 @@ sk_open(sock *s) fd = socket(BIRD_PF, SOCK_STREAM, IPPROTO_TCP); break; case SK_UDP: - case SK_UDP_MC: fd = socket(BIRD_PF, SOCK_DGRAM, IPPROTO_UDP); break; case SK_IP: - case SK_IP_MC: fd = socket(BIRD_PF, SOCK_RAW, s->dport); break; case SK_MAGIC: @@ -861,61 +1014,11 @@ sk_open(sock *s) if (err = sk_setup(s)) goto bad; - switch (type) - { - case SK_UDP: - case SK_IP: - if (s->iface) /* It's a broadcast socket */ -#ifdef IPV6 - bug("IPv6 has no broadcasts"); -#else - if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0) - ERR("SO_BROADCAST"); -#endif - break; - case SK_UDP_MC: - case SK_IP_MC: - { -#ifdef IPV6 - /* Fortunately, IPv6 socket interface is recent enough and therefore standardized */ - ASSERT(s->iface && s->iface->addr); - if (ipa_nonzero(s->daddr)) - { - int t = s->iface->index; - int zero = 0; - if (setsockopt(fd, SOL_IPV6, IPV6_MULTICAST_HOPS, &s->ttl, sizeof(s->ttl)) < 0) - ERR("IPV6_MULTICAST_HOPS"); - if (setsockopt(fd, SOL_IPV6, IPV6_MULTICAST_LOOP, &zero, sizeof(zero)) < 0) - ERR("IPV6_MULTICAST_LOOP"); - if (setsockopt(fd, SOL_IPV6, IPV6_MULTICAST_IF, &t, sizeof(t)) < 0) - ERR("IPV6_MULTICAST_IF"); - } - if (has_src) - { - struct ipv6_mreq mreq; - set_inaddr(&mreq.ipv6mr_multiaddr, s->daddr); -#ifdef CONFIG_IPV6_GLIBC_20 - mreq.ipv6mr_ifindex = s->iface->index; -#else - mreq.ipv6mr_interface = s->iface->index; -#endif /* CONFIG_IPV6_GLIBC_20 */ - if (setsockopt(fd, SOL_IPV6, IPV6_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) - ERR("IPV6_ADD_MEMBERSHIP"); - } -#else - /* With IPv4 there are zillions of different socket interface variants. Ugh. */ - ASSERT(s->iface && s->iface->addr); - if (err = sysio_mcast_join(s)) - goto bad; -#endif /* IPV6 */ - break; - } - } if (has_src) { int port; - if (type == SK_IP || type == SK_IP_MC) + if (type == SK_IP) port = 0; else { @@ -924,12 +1027,8 @@ sk_open(sock *s) ERR("SO_REUSEADDR"); } fill_in_sockaddr(&sa, s->saddr, port); -#ifdef CONFIG_SKIP_MC_BIND - if ((type != SK_UDP_MC) && (type != SK_IP_MC) && - bind(fd, (struct sockaddr *) &sa, sizeof(sa)) < 0) -#else + fill_in_sockifa(&sa, s->iface); if (bind(fd, (struct sockaddr *) &sa, sizeof(sa)) < 0) -#endif ERR("bind"); } fill_in_sockaddr(&sa, s->daddr, s->dport); @@ -1050,16 +1149,15 @@ sk_maybe_write(sock *s) s->ttx = s->tpos = s->tbuf; return 1; case SK_UDP: - case SK_UDP_MC: case SK_IP: - case SK_IP_MC: { sockaddr sa; if (s->tbuf == s->tpos) return 1; - fill_in_sockaddr(&sa, s->faddr, s->fport); + fill_in_sockaddr(&sa, s->faddr, s->fport); + fill_in_sockifa(&sa, s->iface); e = sendto(s->fd, s->tbuf, s->tpos - s->tbuf, 0, (struct sockaddr *) &sa, sizeof(sa)); if (e < 0) { |