diff options
Diffstat (limited to 'zebra/kernel_socket.c')
| -rw-r--r-- | zebra/kernel_socket.c | 2046 |
1 files changed, 1026 insertions, 1020 deletions
diff --git a/zebra/kernel_socket.c b/zebra/kernel_socket.c index 5b9236f7f..4b63a3eb0 100644 --- a/zebra/kernel_socket.c +++ b/zebra/kernel_socket.c @@ -90,7 +90,8 @@ extern struct zebra_privs_t zserv_privs; * intentional, to provoke filing bug reports with operating systems * that don't define RT_ROUNDUP or equivalent. */ -#warning "net/route.h does not define RT_ROUNDUP; making unwarranted assumptions!" +#warning \ + "net/route.h does not define RT_ROUNDUP; making unwarranted assumptions!" /* OS X (Xcode as of 2014-12) is known not to define RT_ROUNDUP */ #ifdef __APPLE__ @@ -99,8 +100,9 @@ extern struct zebra_privs_t zserv_privs; #define ROUNDUP_TYPE long #endif -#define ROUNDUP(a) \ - ((a) > 0 ? (1 + (((a) - 1) | (sizeof(ROUNDUP_TYPE) - 1))) : sizeof(ROUNDUP_TYPE)) +#define ROUNDUP(a) \ + ((a) > 0 ? (1 + (((a)-1) | (sizeof(ROUNDUP_TYPE) - 1))) \ + : sizeof(ROUNDUP_TYPE)) #endif /* defined(ROUNDUP) */ @@ -115,13 +117,14 @@ extern struct zebra_privs_t zserv_privs; * One would hope all fixed-size structure definitions are aligned, * but round them up nonetheless. */ -#define SAROUNDUP(X) \ - (((struct sockaddr *)(X))->sa_family == AF_INET ? \ - ROUNDUP(sizeof(struct sockaddr_in)):\ - (((struct sockaddr *)(X))->sa_family == AF_INET6 ? \ - ROUNDUP(sizeof(struct sockaddr_in6)) : \ - (((struct sockaddr *)(X))->sa_family == AF_LINK ? \ - ROUNDUP(sizeof(struct sockaddr_dl)) : sizeof(struct sockaddr)))) +#define SAROUNDUP(X) \ + (((struct sockaddr *)(X))->sa_family == AF_INET \ + ? ROUNDUP(sizeof(struct sockaddr_in)) \ + : (((struct sockaddr *)(X))->sa_family == AF_INET6 \ + ? ROUNDUP(sizeof(struct sockaddr_in6)) \ + : (((struct sockaddr *)(X))->sa_family == AF_LINK \ + ? ROUNDUP(sizeof(struct sockaddr_dl)) \ + : sizeof(struct sockaddr)))) #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ #endif /* !SA_SIZE */ @@ -133,152 +136,140 @@ extern struct zebra_privs_t zserv_privs; * 2. So the compiler doesn't complain when DEST is NULL, which is only true * when we are skipping the copy and incrementing to the next SA */ -static inline void -rta_copy (union sockunion *dest, caddr_t src) { - int len; - if (!dest) - return; +static inline void rta_copy(union sockunion *dest, caddr_t src) +{ + int len; + if (!dest) + return; #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN - len = (((struct sockaddr *)src)->sa_len > sizeof (*dest)) ? - sizeof (*dest) : ((struct sockaddr *)src)->sa_len ; + len = (((struct sockaddr *)src)->sa_len > sizeof(*dest)) + ? sizeof(*dest) + : ((struct sockaddr *)src)->sa_len; #else - len = (SAROUNDUP (src) > sizeof (*dest)) ? - sizeof (*dest) : SAROUNDUP (src) ; + len = (SAROUNDUP(src) > sizeof(*dest)) ? sizeof(*dest) : SAROUNDUP(src); #endif - memcpy (dest, src, len); + memcpy(dest, src, len); } -#define RTA_ADDR_GET(DEST, RTA, RTMADDRS, PNT) \ - if ((RTMADDRS) & (RTA)) \ - { \ - int len = SAROUNDUP ((PNT)); \ - if (af_check (((struct sockaddr *)(PNT))->sa_family)) \ - rta_copy((DEST), (PNT)); \ - (PNT) += len; \ - } -#define RTA_ATTR_GET(DEST, RTA, RTMADDRS, PNT) \ - if ((RTMADDRS) & (RTA)) \ - { \ - int len = SAROUNDUP ((PNT)); \ - rta_copy((DEST), (PNT)); \ - (PNT) += len; \ - } - -#define RTA_NAME_GET(DEST, RTA, RTMADDRS, PNT, LEN) \ - if ((RTMADDRS) & (RTA)) \ - { \ - u_char *pdest = (u_char *) (DEST); \ - int len = SAROUNDUP ((PNT)); \ - struct sockaddr_dl *sdl = (struct sockaddr_dl *)(PNT); \ - if (IS_ZEBRA_DEBUG_KERNEL) \ - zlog_debug ("%s: RTA_SDL_GET nlen %d, alen %d", \ - __func__, sdl->sdl_nlen, sdl->sdl_alen); \ - if ( ((DEST) != NULL) && (sdl->sdl_family == AF_LINK) \ - && (sdl->sdl_nlen < IFNAMSIZ) && (sdl->sdl_nlen <= len) ) \ - { \ - memcpy (pdest, sdl->sdl_data, sdl->sdl_nlen); \ - pdest[sdl->sdl_nlen] = '\0'; \ - (LEN) = sdl->sdl_nlen; \ - } \ - (PNT) += len; \ - } \ - else \ - { \ - (LEN) = 0; \ - } +#define RTA_ADDR_GET(DEST, RTA, RTMADDRS, PNT) \ + if ((RTMADDRS) & (RTA)) { \ + int len = SAROUNDUP((PNT)); \ + if (af_check(((struct sockaddr *)(PNT))->sa_family)) \ + rta_copy((DEST), (PNT)); \ + (PNT) += len; \ + } +#define RTA_ATTR_GET(DEST, RTA, RTMADDRS, PNT) \ + if ((RTMADDRS) & (RTA)) { \ + int len = SAROUNDUP((PNT)); \ + rta_copy((DEST), (PNT)); \ + (PNT) += len; \ + } + +#define RTA_NAME_GET(DEST, RTA, RTMADDRS, PNT, LEN) \ + if ((RTMADDRS) & (RTA)) { \ + u_char *pdest = (u_char *)(DEST); \ + int len = SAROUNDUP((PNT)); \ + struct sockaddr_dl *sdl = (struct sockaddr_dl *)(PNT); \ + if (IS_ZEBRA_DEBUG_KERNEL) \ + zlog_debug("%s: RTA_SDL_GET nlen %d, alen %d", \ + __func__, sdl->sdl_nlen, sdl->sdl_alen); \ + if (((DEST) != NULL) && (sdl->sdl_family == AF_LINK) \ + && (sdl->sdl_nlen < IFNAMSIZ) && (sdl->sdl_nlen <= len)) { \ + memcpy(pdest, sdl->sdl_data, sdl->sdl_nlen); \ + pdest[sdl->sdl_nlen] = '\0'; \ + (LEN) = sdl->sdl_nlen; \ + } \ + (PNT) += len; \ + } else { \ + (LEN) = 0; \ + } /* Routing socket message types. */ -const struct message rtm_type_str[] = -{ - {RTM_ADD, "RTM_ADD"}, - {RTM_DELETE, "RTM_DELETE"}, - {RTM_CHANGE, "RTM_CHANGE"}, - {RTM_GET, "RTM_GET"}, - {RTM_LOSING, "RTM_LOSING"}, - {RTM_REDIRECT, "RTM_REDIRECT"}, - {RTM_MISS, "RTM_MISS"}, - {RTM_LOCK, "RTM_LOCK"}, +const struct message rtm_type_str[] = {{RTM_ADD, "RTM_ADD"}, + {RTM_DELETE, "RTM_DELETE"}, + {RTM_CHANGE, "RTM_CHANGE"}, + {RTM_GET, "RTM_GET"}, + {RTM_LOSING, "RTM_LOSING"}, + {RTM_REDIRECT, "RTM_REDIRECT"}, + {RTM_MISS, "RTM_MISS"}, + {RTM_LOCK, "RTM_LOCK"}, #ifdef OLDADD - {RTM_OLDADD, "RTM_OLDADD"}, + {RTM_OLDADD, "RTM_OLDADD"}, #endif /* RTM_OLDADD */ #ifdef RTM_OLDDEL - {RTM_OLDDEL, "RTM_OLDDEL"}, + {RTM_OLDDEL, "RTM_OLDDEL"}, #endif /* RTM_OLDDEL */ - {RTM_RESOLVE, "RTM_RESOLVE"}, - {RTM_NEWADDR, "RTM_NEWADDR"}, - {RTM_DELADDR, "RTM_DELADDR"}, - {RTM_IFINFO, "RTM_IFINFO"}, + {RTM_RESOLVE, "RTM_RESOLVE"}, + {RTM_NEWADDR, "RTM_NEWADDR"}, + {RTM_DELADDR, "RTM_DELADDR"}, + {RTM_IFINFO, "RTM_IFINFO"}, #ifdef RTM_OIFINFO - {RTM_OIFINFO, "RTM_OIFINFO"}, + {RTM_OIFINFO, "RTM_OIFINFO"}, #endif /* RTM_OIFINFO */ #ifdef RTM_NEWMADDR - {RTM_NEWMADDR, "RTM_NEWMADDR"}, + {RTM_NEWMADDR, "RTM_NEWMADDR"}, #endif /* RTM_NEWMADDR */ #ifdef RTM_DELMADDR - {RTM_DELMADDR, "RTM_DELMADDR"}, + {RTM_DELMADDR, "RTM_DELMADDR"}, #endif /* RTM_DELMADDR */ #ifdef RTM_IFANNOUNCE - {RTM_IFANNOUNCE, "RTM_IFANNOUNCE"}, + {RTM_IFANNOUNCE, "RTM_IFANNOUNCE"}, #endif /* RTM_IFANNOUNCE */ - { 0 } -}; - -static const struct message rtm_flag_str[] = -{ - {RTF_UP, "UP"}, - {RTF_GATEWAY, "GATEWAY"}, - {RTF_HOST, "HOST"}, - {RTF_REJECT, "REJECT"}, - {RTF_DYNAMIC, "DYNAMIC"}, - {RTF_MODIFIED, "MODIFIED"}, - {RTF_DONE, "DONE"}, + {0}}; + +static const struct message rtm_flag_str[] = {{RTF_UP, "UP"}, + {RTF_GATEWAY, "GATEWAY"}, + {RTF_HOST, "HOST"}, + {RTF_REJECT, "REJECT"}, + {RTF_DYNAMIC, "DYNAMIC"}, + {RTF_MODIFIED, "MODIFIED"}, + {RTF_DONE, "DONE"}, #ifdef RTF_MASK - {RTF_MASK, "MASK"}, + {RTF_MASK, "MASK"}, #endif /* RTF_MASK */ #ifdef RTF_CLONING - {RTF_CLONING, "CLONING"}, + {RTF_CLONING, "CLONING"}, #endif /* RTF_CLONING */ #ifdef RTF_XRESOLVE - {RTF_XRESOLVE, "XRESOLVE"}, + {RTF_XRESOLVE, "XRESOLVE"}, #endif /* RTF_XRESOLVE */ #ifdef RTF_LLINFO - {RTF_LLINFO, "LLINFO"}, + {RTF_LLINFO, "LLINFO"}, #endif /* RTF_LLINFO */ - {RTF_STATIC, "STATIC"}, - {RTF_BLACKHOLE, "BLACKHOLE"}, + {RTF_STATIC, "STATIC"}, + {RTF_BLACKHOLE, "BLACKHOLE"}, #ifdef RTF_PRIVATE - {RTF_PRIVATE, "PRIVATE"}, + {RTF_PRIVATE, "PRIVATE"}, #endif /* RTF_PRIVATE */ - {RTF_PROTO1, "PROTO1"}, - {RTF_PROTO2, "PROTO2"}, + {RTF_PROTO1, "PROTO1"}, + {RTF_PROTO2, "PROTO2"}, #ifdef RTF_PRCLONING - {RTF_PRCLONING, "PRCLONING"}, + {RTF_PRCLONING, "PRCLONING"}, #endif /* RTF_PRCLONING */ #ifdef RTF_WASCLONED - {RTF_WASCLONED, "WASCLONED"}, + {RTF_WASCLONED, "WASCLONED"}, #endif /* RTF_WASCLONED */ #ifdef RTF_PROTO3 - {RTF_PROTO3, "PROTO3"}, + {RTF_PROTO3, "PROTO3"}, #endif /* RTF_PROTO3 */ #ifdef RTF_PINNED - {RTF_PINNED, "PINNED"}, + {RTF_PINNED, "PINNED"}, #endif /* RTF_PINNED */ #ifdef RTF_LOCAL - {RTF_LOCAL, "LOCAL"}, + {RTF_LOCAL, "LOCAL"}, #endif /* RTF_LOCAL */ #ifdef RTF_BROADCAST - {RTF_BROADCAST, "BROADCAST"}, + {RTF_BROADCAST, "BROADCAST"}, #endif /* RTF_BROADCAST */ #ifdef RTF_MULTICAST - {RTF_MULTICAST, "MULTICAST"}, + {RTF_MULTICAST, "MULTICAST"}, #endif /* RTF_MULTICAST */ #ifdef RTF_MULTIRT - {RTF_MULTIRT, "MULTIRT"}, + {RTF_MULTIRT, "MULTIRT"}, #endif /* RTF_MULTIRT */ #ifdef RTF_SETSRC - {RTF_SETSRC, "SETSRC"}, + {RTF_SETSRC, "SETSRC"}, #endif /* RTF_SETSRC */ - { 0 } -}; + {0}}; /* Kernel routing update socket. */ int routing_sock = -1; @@ -287,115 +278,117 @@ int routing_sock = -1; /* #define DEBUG */ /* Supported address family check. */ -static inline int -af_check (int family) +static inline int af_check(int family) { - if (family == AF_INET) - return 1; - if (family == AF_INET6) - return 1; - return 0; + if (family == AF_INET) + return 1; + if (family == AF_INET6) + return 1; + return 0; } /* Dump routing table flag for debug purpose. */ -static void -rtm_flag_dump (int flag) +static void rtm_flag_dump(int flag) { - const struct message *mes; - static char buf[BUFSIZ]; - - buf[0] = '\0'; - for (mes = rtm_flag_str; mes->key != 0; mes++) - { - if (mes->key & flag) - { - strlcat (buf, mes->str, BUFSIZ); - strlcat (buf, " ", BUFSIZ); + const struct message *mes; + static char buf[BUFSIZ]; + + buf[0] = '\0'; + for (mes = rtm_flag_str; mes->key != 0; mes++) { + if (mes->key & flag) { + strlcat(buf, mes->str, BUFSIZ); + strlcat(buf, " ", BUFSIZ); + } } - } - zlog_debug ("Kernel: %s", buf); + zlog_debug("Kernel: %s", buf); } #ifdef RTM_IFANNOUNCE /* Interface adding function */ -static int -ifan_read (struct if_announcemsghdr *ifan) +static int ifan_read(struct if_announcemsghdr *ifan) { - struct interface *ifp; - - ifp = if_lookup_by_index (ifan->ifan_index, VRF_DEFAULT); - - if (ifp) - assert ( (ifp->ifindex == ifan->ifan_index) - || (ifp->ifindex == IFINDEX_INTERNAL) ); - - if ( (ifp == NULL) - || ((ifp->ifindex == IFINDEX_INTERNAL) - && (ifan->ifan_what == IFAN_ARRIVAL)) ) - { - if (IS_ZEBRA_DEBUG_KERNEL) - zlog_debug ("%s: creating interface for ifindex %d, name %s", - __func__, ifan->ifan_index, ifan->ifan_name); - - /* Create Interface */ - ifp = if_get_by_name_len(ifan->ifan_name, - strnlen(ifan->ifan_name, - sizeof(ifan->ifan_name)), - VRF_DEFAULT, 0); - ifp->ifindex = ifan->ifan_index; - - if_get_metric (ifp); - if_add_update (ifp); - } - else if (ifp != NULL && ifan->ifan_what == IFAN_DEPARTURE) - if_delete_update (ifp); - - if_get_flags (ifp); - if_get_mtu (ifp); - if_get_metric (ifp); - - if (IS_ZEBRA_DEBUG_KERNEL) - zlog_debug ("%s: interface %s index %d", - __func__, ifan->ifan_name, ifan->ifan_index); - - return 0; + struct interface *ifp; + + ifp = if_lookup_by_index(ifan->ifan_index, VRF_DEFAULT); + + if (ifp) + assert((ifp->ifindex == ifan->ifan_index) + || (ifp->ifindex == IFINDEX_INTERNAL)); + + if ((ifp == NULL) || ((ifp->ifindex == IFINDEX_INTERNAL) + && (ifan->ifan_what == IFAN_ARRIVAL))) { + if (IS_ZEBRA_DEBUG_KERNEL) + zlog_debug( + "%s: creating interface for ifindex %d, name %s", + __func__, ifan->ifan_index, ifan->ifan_name); + + /* Create Interface */ + ifp = if_get_by_name_len( + ifan->ifan_name, + strnlen(ifan->ifan_name, sizeof(ifan->ifan_name)), + VRF_DEFAULT, 0); + ifp->ifindex = ifan->ifan_index; + + if_get_metric(ifp); + if_add_update(ifp); + } else if (ifp != NULL && ifan->ifan_what == IFAN_DEPARTURE) + if_delete_update(ifp); + + if_get_flags(ifp); + if_get_mtu(ifp); + if_get_metric(ifp); + + if (IS_ZEBRA_DEBUG_KERNEL) + zlog_debug("%s: interface %s index %d", __func__, + ifan->ifan_name, ifan->ifan_index); + + return 0; } #endif /* RTM_IFANNOUNCE */ #ifdef HAVE_BSD_IFI_LINK_STATE /* BSD link detect translation */ -static void -bsd_linkdetect_translate (struct if_msghdr *ifm) +static void bsd_linkdetect_translate(struct if_msghdr *ifm) { - if ((ifm->ifm_data.ifi_link_state >= LINK_STATE_UP) || - (ifm->ifm_data.ifi_link_state == LINK_STATE_UNKNOWN)) - SET_FLAG(ifm->ifm_flags, IFF_RUNNING); - else - UNSET_FLAG(ifm->ifm_flags, IFF_RUNNING); + if ((ifm->ifm_data.ifi_link_state >= LINK_STATE_UP) + || (ifm->ifm_data.ifi_link_state == LINK_STATE_UNKNOWN)) + SET_FLAG(ifm->ifm_flags, IFF_RUNNING); + else + UNSET_FLAG(ifm->ifm_flags, IFF_RUNNING); } #endif /* HAVE_BSD_IFI_LINK_STATE */ -static enum zebra_link_type -sdl_to_zebra_link_type (unsigned int sdlt) +static enum zebra_link_type sdl_to_zebra_link_type(unsigned int sdlt) { - switch (sdlt) - { - case IFT_ETHER: return ZEBRA_LLT_ETHER; - case IFT_X25: return ZEBRA_LLT_X25; - case IFT_FDDI: return ZEBRA_LLT_FDDI; - case IFT_PPP: return ZEBRA_LLT_PPP; - case IFT_LOOP: return ZEBRA_LLT_LOOPBACK; - case IFT_SLIP: return ZEBRA_LLT_SLIP; - case IFT_ARCNET: return ZEBRA_LLT_ARCNET; - case IFT_ATM: return ZEBRA_LLT_ATM; - case IFT_LOCALTALK: return ZEBRA_LLT_LOCALTLK; - case IFT_HIPPI: return ZEBRA_LLT_HIPPI; + switch (sdlt) { + case IFT_ETHER: + return ZEBRA_LLT_ETHER; + case IFT_X25: + return ZEBRA_LLT_X25; + case IFT_FDDI: + return ZEBRA_LLT_FDDI; + case IFT_PPP: + return ZEBRA_LLT_PPP; + case IFT_LOOP: + return ZEBRA_LLT_LOOPBACK; + case IFT_SLIP: + return ZEBRA_LLT_SLIP; + case IFT_ARCNET: + return ZEBRA_LLT_ARCNET; + case IFT_ATM: + return ZEBRA_LLT_ATM; + case IFT_LOCALTALK: + return ZEBRA_LLT_LOCALTLK; + case IFT_HIPPI: + return ZEBRA_LLT_HIPPI; #ifdef IFT_IEEE1394 - case IFT_IEEE1394: return ZEBRA_LLT_IEEE1394; + case IFT_IEEE1394: + return ZEBRA_LLT_IEEE1394; #endif - default: return ZEBRA_LLT_UNKNOWN; - } + default: + return ZEBRA_LLT_UNKNOWN; + } } /* @@ -403,341 +396,338 @@ sdl_to_zebra_link_type (unsigned int sdlt) * sysctl (from interface_list). There may or may not be sockaddrs * present after the header. */ -int -ifm_read (struct if_msghdr *ifm) +int ifm_read(struct if_msghdr *ifm) { - struct interface *ifp = NULL; - struct sockaddr_dl *sdl; - char ifname[IFNAMSIZ]; - short ifnlen = 0; - caddr_t cp; - - /* terminate ifname at head (for strnlen) and tail (for safety) */ - ifname[IFNAMSIZ - 1] = '\0'; - - /* paranoia: sanity check structure */ - if (ifm->ifm_msglen < sizeof(struct if_msghdr)) - { - zlog_err ("ifm_read: ifm->ifm_msglen %d too short\n", - ifm->ifm_msglen); - return -1; - } - - /* - * Check for a sockaddr_dl following the message. First, point to - * where a socakddr might be if one follows the message. - */ - cp = (void *)(ifm + 1); + struct interface *ifp = NULL; + struct sockaddr_dl *sdl; + char ifname[IFNAMSIZ]; + short ifnlen = 0; + caddr_t cp; + + /* terminate ifname at head (for strnlen) and tail (for safety) */ + ifname[IFNAMSIZ - 1] = '\0'; + + /* paranoia: sanity check structure */ + if (ifm->ifm_msglen < sizeof(struct if_msghdr)) { + zlog_err("ifm_read: ifm->ifm_msglen %d too short\n", + ifm->ifm_msglen); + return -1; + } + + /* + * Check for a sockaddr_dl following the message. First, point to + * where a socakddr might be if one follows the message. + */ + cp = (void *)(ifm + 1); #ifdef SUNOS_5 - /* - * XXX This behavior should be narrowed to only the kernel versions - * for which the structures returned do not match the headers. - * - * if_msghdr_t on 64 bit kernels in Solaris 9 and earlier versions - * is 12 bytes larger than the 32 bit version. - */ - if (((struct sockaddr *) cp)->sa_family == AF_UNSPEC) - cp = cp + 12; + /* + * XXX This behavior should be narrowed to only the kernel versions + * for which the structures returned do not match the headers. + * + * if_msghdr_t on 64 bit kernels in Solaris 9 and earlier versions + * is 12 bytes larger than the 32 bit version. + */ + if (((struct sockaddr *)cp)->sa_family == AF_UNSPEC) + cp = cp + 12; #endif - RTA_ADDR_GET (NULL, RTA_DST, ifm->ifm_addrs, cp); - RTA_ADDR_GET (NULL, RTA_GATEWAY, ifm->ifm_addrs, cp); - RTA_ATTR_GET (NULL, RTA_NETMASK, ifm->ifm_addrs, cp); - RTA_ADDR_GET (NULL, RTA_GENMASK, ifm->ifm_addrs, cp); - sdl = (struct sockaddr_dl *)cp; - RTA_NAME_GET (ifname, RTA_IFP, ifm->ifm_addrs, cp, ifnlen); - RTA_ADDR_GET (NULL, RTA_IFA, ifm->ifm_addrs, cp); - RTA_ADDR_GET (NULL, RTA_AUTHOR, ifm->ifm_addrs, cp); - RTA_ADDR_GET (NULL, RTA_BRD, ifm->ifm_addrs, cp); - - if (IS_ZEBRA_DEBUG_KERNEL) - zlog_debug ("%s: sdl ifname %s", __func__, (ifnlen ? ifname : "(nil)")); - - /* - * Look up on ifindex first, because ifindices are the primary handle for - * interfaces across the user/kernel boundary, for most systems. (Some - * messages, such as up/down status changes on NetBSD, do not include a - * sockaddr_dl). - */ - if ( (ifp = if_lookup_by_index (ifm->ifm_index, VRF_DEFAULT)) != NULL ) - { - /* we have an ifp, verify that the name matches as some systems, - * eg Solaris, have a 1:many association of ifindex:ifname - * if they dont match, we dont have the correct ifp and should - * set it back to NULL to let next check do lookup by name - */ - if (ifnlen && (strncmp (ifp->name, ifname, IFNAMSIZ) != 0) ) - { - if (IS_ZEBRA_DEBUG_KERNEL) - zlog_debug ("%s: ifp name %s doesnt match sdl name %s", - __func__, ifp->name, ifname); - ifp = NULL; - } - } - - /* - * If we dont have an ifp, try looking up by name. Particularly as some - * systems (Solaris) have a 1:many mapping of ifindex:ifname - the ifname - * is therefore our unique handle to that interface. - * - * Interfaces specified in the configuration file for which the ifindex - * has not been determined will have ifindex == IFINDEX_INTERNAL, and such - * interfaces are found by this search, and then their ifindex values can - * be filled in. - */ - if ( (ifp == NULL) && ifnlen) - ifp = if_lookup_by_name (ifname, VRF_DEFAULT); - - /* - * If ifp still does not exist or has an invalid index (IFINDEX_INTERNAL), - * create or fill in an interface. - */ - if ((ifp == NULL) || (ifp->ifindex == IFINDEX_INTERNAL)) - { - /* - * To create or fill in an interface, a sockaddr_dl (via - * RTA_IFP) is required. - */ - if (!ifnlen) - { - zlog_warn ("Interface index %d (new) missing ifname\n", - ifm->ifm_index); - return -1; + RTA_ADDR_GET(NULL, RTA_DST, ifm->ifm_addrs, cp); + RTA_ADDR_GET(NULL, RTA_GATEWAY, ifm->ifm_addrs, cp); + RTA_ATTR_GET(NULL, RTA_NETMASK, ifm->ifm_addrs, cp); + RTA_ADDR_GET(NULL, RTA_GENMASK, ifm->ifm_addrs, cp); + sdl = (struct sockaddr_dl *)cp; + RTA_NAME_GET(ifname, RTA_IFP, ifm->ifm_addrs, cp, ifnlen); + RTA_ADDR_GET(NULL, RTA_IFA, ifm->ifm_addrs, cp); + RTA_ADDR_GET(NULL, RTA_AUTHOR, ifm->ifm_addrs, cp); + RTA_ADDR_GET(NULL, RTA_BRD, ifm->ifm_addrs, cp); + + if (IS_ZEBRA_DEBUG_KERNEL) + zlog_debug("%s: sdl ifname %s", __func__, + (ifnlen ? ifname : "(nil)")); + + /* + * Look up on ifindex first, because ifindices are the primary handle + * for + * interfaces across the user/kernel boundary, for most systems. (Some + * messages, such as up/down status changes on NetBSD, do not include a + * sockaddr_dl). + */ + if ((ifp = if_lookup_by_index(ifm->ifm_index, VRF_DEFAULT)) != NULL) { + /* we have an ifp, verify that the name matches as some systems, + * eg Solaris, have a 1:many association of ifindex:ifname + * if they dont match, we dont have the correct ifp and should + * set it back to NULL to let next check do lookup by name + */ + if (ifnlen && (strncmp(ifp->name, ifname, IFNAMSIZ) != 0)) { + if (IS_ZEBRA_DEBUG_KERNEL) + zlog_debug( + "%s: ifp name %s doesnt match sdl name %s", + __func__, ifp->name, ifname); + ifp = NULL; + } } + /* + * If we dont have an ifp, try looking up by name. Particularly as some + * systems (Solaris) have a 1:many mapping of ifindex:ifname - the + * ifname + * is therefore our unique handle to that interface. + * + * Interfaces specified in the configuration file for which the ifindex + * has not been determined will have ifindex == IFINDEX_INTERNAL, and + * such + * interfaces are found by this search, and then their ifindex values + * can + * be filled in. + */ + if ((ifp == NULL) && ifnlen) + ifp = if_lookup_by_name(ifname, VRF_DEFAULT); + + /* + * If ifp still does not exist or has an invalid index + * (IFINDEX_INTERNAL), + * create or fill in an interface. + */ + if ((ifp == NULL) || (ifp->ifindex == IFINDEX_INTERNAL)) { + /* + * To create or fill in an interface, a sockaddr_dl (via + * RTA_IFP) is required. + */ + if (!ifnlen) { + zlog_warn("Interface index %d (new) missing ifname\n", + ifm->ifm_index); + return -1; + } + #ifndef RTM_IFANNOUNCE - /* Down->Down interface should be ignored here. - * See further comment below. - */ - if (!CHECK_FLAG (ifm->ifm_flags, IFF_UP)) - return 0; + /* Down->Down interface should be ignored here. + * See further comment below. + */ + if (!CHECK_FLAG(ifm->ifm_flags, IFF_UP)) + return 0; #endif /* !RTM_IFANNOUNCE */ - - if (ifp == NULL) - { - /* Interface that zebra was not previously aware of, so create. */ - ifp = if_create (ifname, ifnlen, VRF_DEFAULT); - if (IS_ZEBRA_DEBUG_KERNEL) - zlog_debug ("%s: creating ifp for ifindex %d", - __func__, ifm->ifm_index); - } - - if (IS_ZEBRA_DEBUG_KERNEL) - zlog_debug ("%s: updated/created ifp, ifname %s, ifindex %d", - __func__, ifp->name, ifp->ifindex); - /* - * Fill in newly created interface structure, or larval - * structure with ifindex IFINDEX_INTERNAL. - */ - ifp->ifindex = ifm->ifm_index; - + + if (ifp == NULL) { + /* Interface that zebra was not previously aware of, so + * create. */ + ifp = if_create(ifname, ifnlen, VRF_DEFAULT); + if (IS_ZEBRA_DEBUG_KERNEL) + zlog_debug("%s: creating ifp for ifindex %d", + __func__, ifm->ifm_index); + } + + if (IS_ZEBRA_DEBUG_KERNEL) + zlog_debug( + "%s: updated/created ifp, ifname %s, ifindex %d", + __func__, ifp->name, ifp->ifindex); + /* + * Fill in newly created interface structure, or larval + * structure with ifindex IFINDEX_INTERNAL. + */ + ifp->ifindex = ifm->ifm_index; + #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */ - bsd_linkdetect_translate(ifm); + bsd_linkdetect_translate(ifm); #endif /* HAVE_BSD_IFI_LINK_STATE */ - if_flags_update (ifp, ifm->ifm_flags); + if_flags_update(ifp, ifm->ifm_flags); #if defined(__bsdi__) - if_kvm_get_mtu (ifp); + if_kvm_get_mtu(ifp); #else - if_get_mtu (ifp); + if_get_mtu(ifp); #endif /* __bsdi__ */ - if_get_metric (ifp); - - /* - * XXX sockaddr_dl contents can be larger than the structure - * definition. There are 2 big families here: - * - BSD has sdl_len + sdl_data[16] + overruns sdl_data - * we MUST use sdl_len here or we'll truncate data. - * - Solaris has no sdl_len, but sdl_data[244] - * presumably, it's not going to run past that, so sizeof() - * is fine here. - * a nonzero ifnlen from RTA_NAME_GET() means sdl is valid - */ - ifp->ll_type = ZEBRA_LLT_UNKNOWN; - ifp->hw_addr_len = 0; - if (ifnlen) - { + if_get_metric(ifp); + + /* + * XXX sockaddr_dl contents can be larger than the structure + * definition. There are 2 big families here: + * - BSD has sdl_len + sdl_data[16] + overruns sdl_data + * we MUST use sdl_len here or we'll truncate data. + * - Solaris has no sdl_len, but sdl_data[244] + * presumably, it's not going to run past that, so sizeof() + * is fine here. + * a nonzero ifnlen from RTA_NAME_GET() means sdl is valid + */ + ifp->ll_type = ZEBRA_LLT_UNKNOWN; + ifp->hw_addr_len = 0; + if (ifnlen) { #ifdef HAVE_STRUCT_SOCKADDR_DL_SDL_LEN - memcpy (&((struct zebra_if *)ifp->info)->sdl, sdl, sdl->sdl_len); + memcpy(&((struct zebra_if *)ifp->info)->sdl, sdl, + sdl->sdl_len); #else - memcpy (&((struct zebra_if *)ifp->info)->sdl, sdl, sizeof (struct sockaddr_dl)); + memcpy(&((struct zebra_if *)ifp->info)->sdl, sdl, + sizeof(struct sockaddr_dl)); #endif /* HAVE_STRUCT_SOCKADDR_DL_SDL_LEN */ - ifp->ll_type = sdl_to_zebra_link_type (sdl->sdl_type); - if (sdl->sdl_alen <= sizeof(ifp->hw_addr)) - { - memcpy (ifp->hw_addr, LLADDR(sdl), sdl->sdl_alen); - ifp->hw_addr_len = sdl->sdl_alen; - } - } - - if_add_update (ifp); - } - else - /* - * Interface structure exists. Adjust stored flags from - * notification. If interface has up->down or down->up - * transition, call state change routines (to adjust routes, - * notify routing daemons, etc.). (Other flag changes are stored - * but apparently do not trigger action.) - */ - { - if (ifp->ifindex != ifm->ifm_index) - { - zlog_warn ("%s: index mismatch, ifname %s, ifp index %d, " - "ifm index %d", - __func__, ifp->name, ifp->ifindex, ifm->ifm_index); - return -1; - } - + ifp->ll_type = sdl_to_zebra_link_type(sdl->sdl_type); + if (sdl->sdl_alen <= sizeof(ifp->hw_addr)) { + memcpy(ifp->hw_addr, LLADDR(sdl), + sdl->sdl_alen); + ifp->hw_addr_len = sdl->sdl_alen; + } + } + + if_add_update(ifp); + } else + /* + * Interface structure exists. Adjust stored flags from + * notification. If interface has up->down or down->up + * transition, call state change routines (to adjust routes, + * notify routing daemons, etc.). (Other flag changes are stored + * but apparently do not trigger action.) + */ + { + if (ifp->ifindex != ifm->ifm_index) { + zlog_warn( + "%s: index mismatch, ifname %s, ifp index %d, " + "ifm index %d", + __func__, ifp->name, ifp->ifindex, + ifm->ifm_index); + return -1; + } + #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */ - bsd_linkdetect_translate(ifm); + bsd_linkdetect_translate(ifm); #endif /* HAVE_BSD_IFI_LINK_STATE */ - /* update flags and handle operative->inoperative transition, if any */ - if_flags_update (ifp, ifm->ifm_flags); - + /* update flags and handle operative->inoperative transition, if + * any */ + if_flags_update(ifp, ifm->ifm_flags); + #ifndef RTM_IFANNOUNCE - if (!if_is_up (ifp)) - { - /* No RTM_IFANNOUNCE on this platform, so we can never - * distinguish between ~IFF_UP and delete. We must presume - * it has been deleted. - * Eg, Solaris will not notify us of unplumb. - * - * XXX: Fixme - this should be runtime detected - * So that a binary compiled on a system with IFANNOUNCE - * will still behave correctly if run on a platform without - */ - if_delete_update (ifp); - } + if (!if_is_up(ifp)) { + /* No RTM_IFANNOUNCE on this platform, so we can never + * distinguish between ~IFF_UP and delete. We must + * presume + * it has been deleted. + * Eg, Solaris will not notify us of unplumb. + * + * XXX: Fixme - this should be runtime detected + * So that a binary compiled on a system with IFANNOUNCE + * will still behave correctly if run on a platform + * without + */ + if_delete_update(ifp); + } #endif /* RTM_IFANNOUNCE */ - if (if_is_up (ifp)) - { + if (if_is_up(ifp)) { #if defined(__bsdi__) - if_kvm_get_mtu (ifp); + if_kvm_get_mtu(ifp); #else - if_get_mtu (ifp); + if_get_mtu(ifp); #endif /* __bsdi__ */ - if_get_metric (ifp); - } - } + if_get_metric(ifp); + } + } #ifdef HAVE_NET_RT_IFLIST - ifp->stats = ifm->ifm_data; + ifp->stats = ifm->ifm_data; #endif /* HAVE_NET_RT_IFLIST */ - if (IS_ZEBRA_DEBUG_KERNEL) - zlog_debug ("%s: interface %s index %d", - __func__, ifp->name, ifp->ifindex); + if (IS_ZEBRA_DEBUG_KERNEL) + zlog_debug("%s: interface %s index %d", __func__, ifp->name, + ifp->ifindex); - return 0; + return 0; } /* Address read from struct ifa_msghdr. */ -static void -ifam_read_mesg (struct ifa_msghdr *ifm, - union sockunion *addr, - union sockunion *mask, - union sockunion *brd, - char *ifname, - short *ifnlen) +static void ifam_read_mesg(struct ifa_msghdr *ifm, union sockunion *addr, + union sockunion *mask, union sockunion *brd, + char *ifname, short *ifnlen) { - caddr_t pnt, end; - union sockunion dst; - union sockunion gateway; - - pnt = (caddr_t)(ifm + 1); - end = ((caddr_t)ifm) + ifm->ifam_msglen; - - /* Be sure structure is cleared */ - memset (mask, 0, sizeof (union sockunion)); - memset (addr, 0, sizeof (union sockunion)); - memset (brd, 0, sizeof (union sockunion)); - memset (&dst, 0, sizeof (union sockunion)); - memset (&gateway, 0, sizeof (union sockunion)); - - /* We fetch each socket variable into sockunion. */ - RTA_ADDR_GET (&dst, RTA_DST, ifm->ifam_addrs, pnt); - RTA_ADDR_GET (&gateway, RTA_GATEWAY, ifm->ifam_addrs, pnt); - RTA_ATTR_GET (mask, RTA_NETMASK, ifm->ifam_addrs, pnt); - RTA_ADDR_GET (NULL, RTA_GENMASK, ifm->ifam_addrs, pnt); - RTA_NAME_GET (ifname, RTA_IFP, ifm->ifam_addrs, pnt, *ifnlen); - RTA_ADDR_GET (addr, RTA_IFA, ifm->ifam_addrs, pnt); - RTA_ADDR_GET (NULL, RTA_AUTHOR, ifm->ifam_addrs, pnt); - RTA_ADDR_GET (brd, RTA_BRD, ifm->ifam_addrs, pnt); - - if (IS_ZEBRA_DEBUG_KERNEL) - { - int family = sockunion_family(addr); - switch (family) - { - case AF_INET: - case AF_INET6: - { - char buf[4][INET6_ADDRSTRLEN]; - zlog_debug ("%s: ifindex %d, ifname %s, ifam_addrs 0x%x, " - "ifam_flags 0x%x, addr %s/%d broad %s dst %s " - "gateway %s", - __func__, ifm->ifam_index, - (ifnlen ? ifname : "(nil)"), ifm->ifam_addrs, - ifm->ifam_flags, - inet_ntop(family,&addr->sin.sin_addr, - buf[0],sizeof(buf[0])), - ip_masklen(mask->sin.sin_addr), - inet_ntop(family,&brd->sin.sin_addr, - buf[1],sizeof(buf[1])), - inet_ntop(family,&dst.sin.sin_addr, - buf[2],sizeof(buf[2])), - inet_ntop(family,&gateway.sin.sin_addr, - buf[3],sizeof(buf[3]))); - } - break; - default: - zlog_debug ("%s: ifindex %d, ifname %s, ifam_addrs 0x%x", - __func__, ifm->ifam_index, - (ifnlen ? ifname : "(nil)"), ifm->ifam_addrs); - break; - } - } - - /* Assert read up end point matches to end point */ - if (pnt != end) - zlog_warn ("ifam_read() doesn't read all socket data"); + caddr_t pnt, end; + union sockunion dst; + union sockunion gateway; + + pnt = (caddr_t)(ifm + 1); + end = ((caddr_t)ifm) + ifm->ifam_msglen; + + /* Be sure structure is cleared */ + memset(mask, 0, sizeof(union sockunion)); + memset(addr, 0, sizeof(union sockunion)); + memset(brd, 0, sizeof(union sockunion)); + memset(&dst, 0, sizeof(union sockunion)); + memset(&gateway, 0, sizeof(union sockunion)); + + /* We fetch each socket variable into sockunion. */ + RTA_ADDR_GET(&dst, RTA_DST, ifm->ifam_addrs, pnt); + RTA_ADDR_GET(&gateway, RTA_GATEWAY, ifm->ifam_addrs, pnt); + RTA_ATTR_GET(mask, RTA_NETMASK, ifm->ifam_addrs, pnt); + RTA_ADDR_GET(NULL, RTA_GENMASK, ifm->ifam_addrs, pnt); + RTA_NAME_GET(ifname, RTA_IFP, ifm->ifam_addrs, pnt, *ifnlen); + RTA_ADDR_GET(addr, RTA_IFA, ifm->ifam_addrs, pnt); + RTA_ADDR_GET(NULL, RTA_AUTHOR, ifm->ifam_addrs, pnt); + RTA_ADDR_GET(brd, RTA_BRD, ifm->ifam_addrs, pnt); + + if (IS_ZEBRA_DEBUG_KERNEL) { + int family = sockunion_family(addr); + switch (family) { + case AF_INET: + case AF_INET6: { + char buf[4][INET6_ADDRSTRLEN]; + zlog_debug( + "%s: ifindex %d, ifname %s, ifam_addrs 0x%x, " + "ifam_flags 0x%x, addr %s/%d broad %s dst %s " + "gateway %s", + __func__, ifm->ifam_index, + (ifnlen ? ifname : "(nil)"), ifm->ifam_addrs, + ifm->ifam_flags, + inet_ntop(family, &addr->sin.sin_addr, buf[0], + sizeof(buf[0])), + ip_masklen(mask->sin.sin_addr), + inet_ntop(family, &brd->sin.sin_addr, buf[1], + sizeof(buf[1])), + inet_ntop(family, &dst.sin.sin_addr, buf[2], + sizeof(buf[2])), + inet_ntop(family, &gateway.sin.sin_addr, buf[3], + sizeof(buf[3]))); + } break; + default: + zlog_debug("%s: ifindex %d, ifname %s, ifam_addrs 0x%x", + __func__, ifm->ifam_index, + (ifnlen ? ifname : "(nil)"), + ifm->ifam_addrs); + break; + } + } + + /* Assert read up end point matches to end point */ + if (pnt != end) + zlog_warn("ifam_read() doesn't read all socket data"); } /* Interface's address information get. */ -int -ifam_read (struct ifa_msghdr *ifam) +int ifam_read(struct ifa_msghdr *ifam) { - struct interface *ifp = NULL; - union sockunion addr, mask, brd; - char ifname[INTERFACE_NAMSIZ]; - short ifnlen = 0; - char isalias = 0; - int flags = 0; - - ifname[0] = ifname[INTERFACE_NAMSIZ - 1] = '\0'; - - /* Allocate and read address information. */ - ifam_read_mesg (ifam, &addr, &mask, &brd, ifname, &ifnlen); - - if ((ifp = if_lookup_by_index(ifam->ifam_index, VRF_DEFAULT)) == NULL) - { - zlog_warn ("%s: no interface for ifname %s, index %d", - __func__, ifname, ifam->ifam_index); - return -1; - } - - if (ifnlen && strncmp (ifp->name, ifname, INTERFACE_NAMSIZ)) - isalias = 1; - - /* N.B. The info in ifa_msghdr does not tell us whether the RTA_BRD - field contains a broadcast address or a peer address, so we are forced to - rely upon the interface type. */ - if (if_is_pointopoint(ifp)) - SET_FLAG(flags, ZEBRA_IFA_PEER); + struct interface *ifp = NULL; + union sockunion addr, mask, brd; + char ifname[INTERFACE_NAMSIZ]; + short ifnlen = 0; + char isalias = 0; + int flags = 0; + + ifname[0] = ifname[INTERFACE_NAMSIZ - 1] = '\0'; + + /* Allocate and read address information. */ + ifam_read_mesg(ifam, &addr, &mask, &brd, ifname, &ifnlen); + + if ((ifp = if_lookup_by_index(ifam->ifam_index, VRF_DEFAULT)) == NULL) { + zlog_warn("%s: no interface for ifname %s, index %d", __func__, + ifname, ifam->ifam_index); + return -1; + } + + if (ifnlen && strncmp(ifp->name, ifname, INTERFACE_NAMSIZ)) + isalias = 1; + + /* N.B. The info in ifa_msghdr does not tell us whether the RTA_BRD + field contains a broadcast address or a peer address, so we are + forced to + rely upon the interface type. */ + if (if_is_pointopoint(ifp)) + SET_FLAG(flags, ZEBRA_IFA_PEER); #if 0 /* it might seem cute to grab the interface metric here, however @@ -748,450 +738,477 @@ ifam_read (struct ifa_msghdr *ifam) ifp->metric = ifam->ifam_metric; #endif - /* Add connected address. */ - switch (sockunion_family (&addr)) - { - case AF_INET: - if (ifam->ifam_type == RTM_NEWADDR) - connected_add_ipv4 (ifp, flags, &addr.sin.sin_addr, - ip_masklen (mask.sin.sin_addr), - &brd.sin.sin_addr, - (isalias ? ifname : NULL)); - else - connected_delete_ipv4 (ifp, flags, &addr.sin.sin_addr, - ip_masklen (mask.sin.sin_addr), - &brd.sin.sin_addr); - break; - case AF_INET6: - /* Unset interface index from link-local address when IPv6 stack - is KAME. */ - if (IN6_IS_ADDR_LINKLOCAL (&addr.sin6.sin6_addr)) - { - SET_IN6_LINKLOCAL_IFINDEX (addr.sin6.sin6_addr, 0); - } - - if (ifam->ifam_type == RTM_NEWADDR) - connected_add_ipv6 (ifp, flags, &addr.sin6.sin6_addr, - ip6_masklen (mask.sin6.sin6_addr), - &brd.sin6.sin6_addr, - (isalias ? ifname : NULL)); - else - connected_delete_ipv6 (ifp, - &addr.sin6.sin6_addr, - ip6_masklen (mask.sin6.sin6_addr), - &brd.sin6.sin6_addr); - break; - default: - /* Unsupported family silently ignore... */ - break; - } - - /* Check interface flag for implicit up of the interface. */ - if_refresh (ifp); + /* Add connected address. */ + switch (sockunion_family(&addr)) { + case AF_INET: + if (ifam->ifam_type == RTM_NEWADDR) + connected_add_ipv4(ifp, flags, &addr.sin.sin_addr, + ip_masklen(mask.sin.sin_addr), + &brd.sin.sin_addr, + (isalias ? ifname : NULL)); + else + connected_delete_ipv4(ifp, flags, &addr.sin.sin_addr, + ip_masklen(mask.sin.sin_addr), + &brd.sin.sin_addr); + break; + case AF_INET6: + /* Unset interface index from link-local address when IPv6 stack + is KAME. */ + if (IN6_IS_ADDR_LINKLOCAL(&addr.sin6.sin6_addr)) { + SET_IN6_LINKLOCAL_IFINDEX(addr.sin6.sin6_addr, 0); + } + + if (ifam->ifam_type == RTM_NEWADDR) + connected_add_ipv6(ifp, flags, &addr.sin6.sin6_addr, + ip6_masklen(mask.sin6.sin6_addr), + &brd.sin6.sin6_addr, + (isalias ? ifname : NULL)); + else + connected_delete_ipv6(ifp, &addr.sin6.sin6_addr, + ip6_masklen(mask.sin6.sin6_addr), + &brd.sin6.sin6_addr); + break; + default: + /* Unsupported family silently ignore... */ + break; + } + + /* Check interface flag for implicit up of the interface. */ + if_refresh(ifp); #ifdef SUNOS_5 - /* In addition to lacking IFANNOUNCE, on SUNOS IFF_UP is strange. - * See comments for SUNOS_5 in interface.c::if_flags_mangle. - * - * Here we take care of case where the real IFF_UP was previously - * unset (as kept in struct zebra_if.primary_state) and the mangled - * IFF_UP (ie IFF_UP set || listcount(connected) has now transitioned - * to unset due to the lost non-primary address having DELADDR'd. - * - * we must delete the interface, because in between here and next - * event for this interface-name the administrator could unplumb - * and replumb the interface. - */ - if (!if_is_up (ifp)) - if_delete_update (ifp); + /* In addition to lacking IFANNOUNCE, on SUNOS IFF_UP is strange. + * See comments for SUNOS_5 in interface.c::if_flags_mangle. + * + * Here we take care of case where the real IFF_UP was previously + * unset (as kept in struct zebra_if.primary_state) and the mangled + * IFF_UP (ie IFF_UP set || listcount(connected) has now transitioned + * to unset due to the lost non-primary address having DELADDR'd. + * + * we must delete the interface, because in between here and next + * event for this interface-name the administrator could unplumb + * and replumb the interface. + */ + if (!if_is_up(ifp)) + if_delete_update(ifp); #endif /* SUNOS_5 */ - - return 0; + + return 0; } /* Interface function for reading kernel routing table information. */ -static int -rtm_read_mesg (struct rt_msghdr *rtm, - union sockunion *dest, - union sockunion *mask, - union sockunion *gate, - char *ifname, - short *ifnlen) +static int rtm_read_mesg(struct rt_msghdr *rtm, union sockunion *dest, + union sockunion *mask, union sockunion *gate, + char *ifname, short *ifnlen) { - caddr_t pnt, end; - - /* Pnt points out socket data start point. */ - pnt = (caddr_t)(rtm + 1); - end = ((caddr_t)rtm) + rtm->rtm_msglen; - - /* rt_msghdr version check. */ - if (rtm->rtm_version != RTM_VERSION) - zlog_warn("Routing message version different %d should be %d." "This may cause problem\n", - rtm->rtm_version, RTM_VERSION); - - /* Be sure structure is cleared */ - memset (dest, 0, sizeof (union sockunion)); - memset (gate, 0, sizeof (union sockunion)); - memset (mask, 0, sizeof (union sockunion)); - - /* We fetch each socket variable into sockunion. */ - RTA_ADDR_GET (dest, RTA_DST, rtm->rtm_addrs, pnt); - RTA_ADDR_GET (gate, RTA_GATEWAY, rtm->rtm_addrs, pnt); - RTA_ATTR_GET (mask, RTA_NETMASK, rtm->rtm_addrs, pnt); - RTA_ADDR_GET (NULL, RTA_GENMASK, rtm->rtm_addrs, pnt); - RTA_NAME_GET (ifname, RTA_IFP, rtm->rtm_addrs, pnt, *ifnlen); - RTA_ADDR_GET (NULL, RTA_IFA, rtm->rtm_addrs, pnt); - RTA_ADDR_GET (NULL, RTA_AUTHOR, rtm->rtm_addrs, pnt); - RTA_ADDR_GET (NULL, RTA_BRD, rtm->rtm_addrs, pnt); - - /* If there is netmask information set it's family same as - destination family*/ - if (rtm->rtm_addrs & RTA_NETMASK) - mask->sa.sa_family = dest->sa.sa_family; - - /* Assert read up to the end of pointer. */ - if (pnt != end) - zlog_warn("rtm_read() doesn't read all socket data."); - - return rtm->rtm_flags; + caddr_t pnt, end; + + /* Pnt points out socket data start point. */ + pnt = (caddr_t)(rtm + 1); + end = ((caddr_t)rtm) + rtm->rtm_msglen; + + /* rt_msghdr version check. */ + if (rtm->rtm_version != RTM_VERSION) + zlog_warn( + "Routing message version different %d should be %d." + "This may cause problem\n", + rtm->rtm_version, RTM_VERSION); + + /* Be sure structure is cleared */ + memset(dest, 0, sizeof(union sockunion)); + memset(gate, 0, sizeof(union sockunion)); + memset(mask, 0, sizeof(union sockunion)); + + /* We fetch each socket variable into sockunion. */ + RTA_ADDR_GET(dest, RTA_DST, rtm->rtm_addrs, pnt); + RTA_ADDR_GET(gate, RTA_GATEWAY, rtm->rtm_addrs, pnt); + RTA_ATTR_GET(mask, RTA_NETMASK, rtm->rtm_addrs, pnt); + RTA_ADDR_GET(NULL, RTA_GENMASK, rtm->rtm_addrs, pnt); + RTA_NAME_GET(ifname, RTA_IFP, rtm->rtm_addrs, pnt, *ifnlen); + RTA_ADDR_GET(NULL, RTA_IFA, rtm->rtm_addrs, pnt); + RTA_ADDR_GET(NULL, RTA_AUTHOR, rtm->rtm_addrs, pnt); + RTA_ADDR_GET(NULL, RTA_BRD, rtm->rtm_addrs, pnt); + + /* If there is netmask information set it's family same as + destination family*/ + if (rtm->rtm_addrs & RTA_NETMASK) + mask->sa.sa_family = dest->sa.sa_family; + + /* Assert read up to the end of pointer. */ + if (pnt != end) + zlog_warn("rtm_read() doesn't read all socket data."); + + return rtm->rtm_flags; } -void -rtm_read (struct rt_msghdr *rtm) +void rtm_read(struct rt_msghdr *rtm) { - int flags; - u_char zebra_flags; - union sockunion dest, mask, gate; - char ifname[INTERFACE_NAMSIZ + 1]; - short ifnlen = 0; - - zebra_flags = 0; - - /* Read destination and netmask and gateway from rtm message - structure. */ - flags = rtm_read_mesg (rtm, &dest, &mask, &gate, ifname, &ifnlen); - if (!(flags & RTF_DONE)) - return; - if (IS_ZEBRA_DEBUG_KERNEL) - zlog_debug ("%s: got rtm of type %d (%s)", __func__, rtm->rtm_type, - lookup_msg(rtm_type_str, rtm->rtm_type, NULL)); - -#ifdef RTF_CLONED /*bsdi, netbsd 1.6*/ - if (flags & RTF_CLONED) - return; + int flags; + u_char zebra_flags; + union sockunion dest, mask, gate; + char ifname[INTERFACE_NAMSIZ + 1]; + short ifnlen = 0; + + zebra_flags = 0; + + /* Read destination and netmask and gateway from rtm message + structure. */ + flags = rtm_read_mesg(rtm, &dest, &mask, &gate, ifname, &ifnlen); + if (!(flags & RTF_DONE)) + return; + if (IS_ZEBRA_DEBUG_KERNEL) + zlog_debug("%s: got rtm of type %d (%s)", __func__, + rtm->rtm_type, + lookup_msg(rtm_type_str, rtm->rtm_type, NULL)); + +#ifdef RTF_CLONED /*bsdi, netbsd 1.6*/ + if (flags & RTF_CLONED) + return; #endif -#ifdef RTF_WASCLONED /*freebsd*/ - if (flags & RTF_WASCLONED) - return; +#ifdef RTF_WASCLONED /*freebsd*/ + if (flags & RTF_WASCLONED) + return; #endif - if ((rtm->rtm_type == RTM_ADD || rtm->rtm_type == RTM_CHANGE) && ! (flags & RTF_UP)) - return; - - /* This is connected route. */ - if (! (flags & RTF_GATEWAY)) - return; - - if (flags & RTF_PROTO1) - SET_FLAG (zebra_flags, ZEBRA_FLAG_SELFROUTE); - - /* This is persistent route. */ - if (flags & RTF_STATIC) - SET_FLAG (zebra_flags, ZEBRA_FLAG_STATIC); - - /* This is a reject or blackhole route */ - if (flags & RTF_REJECT) - SET_FLAG (zebra_flags, ZEBRA_FLAG_REJECT); - if (flags & RTF_BLACKHOLE) - SET_FLAG (zebra_flags, ZEBRA_FLAG_BLACKHOLE); - - if (dest.sa.sa_family == AF_INET) - { - struct prefix p; - - p.family = AF_INET; - p.u.prefix4 = dest.sin.sin_addr; - if (flags & RTF_HOST) - p.prefixlen = IPV4_MAX_PREFIXLEN; - else - p.prefixlen = ip_masklen (mask.sin.sin_addr); - - /* Catch self originated messages and match them against our current RIB. - * At the same time, ignore unconfirmed messages, they should be tracked - * by rtm_write() and kernel_rtm_ipv4(). - */ - if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid) - { - char buf[PREFIX_STRLEN], gate_buf[INET_ADDRSTRLEN]; - int ret; - if (! IS_ZEBRA_DEBUG_RIB) - return; - ret = rib_lookup_ipv4_route ((struct prefix_ipv4 *)&p, &gate, VRF_DEFAULT); - prefix2str (&p, buf, sizeof(buf)); - switch (rtm->rtm_type) - { - case RTM_ADD: - case RTM_GET: - case RTM_CHANGE: - /* The kernel notifies us about a new route in FIB created by us. - Do we have a correspondent entry in our RIB? */ - switch (ret) - { - case ZEBRA_RIB_NOTFOUND: - zlog_debug ("%s: %s %s: desync: RR isn't yet in RIB, while already in FIB", - __func__, lookup_msg(rtm_type_str, rtm->rtm_type, NULL), buf); - break; - case ZEBRA_RIB_FOUND_CONNECTED: - case ZEBRA_RIB_FOUND_NOGATE: - inet_ntop (AF_INET, &gate.sin.sin_addr, gate_buf, INET_ADDRSTRLEN); - zlog_debug ("%s: %s %s: desync: RR is in RIB, but gate differs (ours is %s)", - __func__, lookup_msg(rtm_type_str, rtm->rtm_type, NULL), buf, gate_buf); - break; - case ZEBRA_RIB_FOUND_EXACT: /* RIB RR == FIB RR */ - zlog_debug ("%s: %s %s: done Ok", - __func__, lookup_msg(rtm_type_str, rtm->rtm_type, NULL), buf); - rib_lookup_and_dump ((struct prefix_ipv4 *)&p, VRF_DEFAULT); - return; - break; - } - break; - case RTM_DELETE: - /* The kernel notifies us about a route deleted by us. Do we still - have it in the RIB? Do we have anything instead? */ - switch (ret) - { - case ZEBRA_RIB_FOUND_EXACT: - zlog_debug ("%s: %s %s: desync: RR is still in RIB, while already not in FIB", - __func__, lookup_msg(rtm_type_str, rtm->rtm_type, NULL), buf); - rib_lookup_and_dump ((struct prefix_ipv4 *)&p, VRF_DEFAULT); - break; - case ZEBRA_RIB_FOUND_CONNECTED: - case ZEBRA_RIB_FOUND_NOGATE: - zlog_debug ("%s: %s %s: desync: RR is still in RIB, plus gate differs", - __func__, lookup_msg(rtm_type_str, rtm->rtm_type, NULL), buf); - rib_lookup_and_dump ((struct prefix_ipv4 *)&p, VRF_DEFAULT); - break; - case ZEBRA_RIB_NOTFOUND: /* RIB RR == FIB RR */ - zlog_debug ("%s: %s %s: done Ok", - __func__, lookup_msg(rtm_type_str, rtm->rtm_type, NULL), buf); - rib_lookup_and_dump ((struct prefix_ipv4 *)&p, VRF_DEFAULT); - return; - break; - } - break; - default: - zlog_debug ("%s: %s: warning: loopback RTM of type %s received", - __func__, buf, lookup_msg(rtm_type_str, rtm->rtm_type, NULL)); - } - return; - } - - /* Change, delete the old prefix, we have no further information - * to specify the route really - */ - if (rtm->rtm_type == RTM_CHANGE) - rib_delete (AFI_IP, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, - 0, zebra_flags, &p, NULL, NULL, 0, 0); - - union g_addr ggate = { .ipv4 = gate.sin.sin_addr }; - if (rtm->rtm_type == RTM_GET - || rtm->rtm_type == RTM_ADD - || rtm->rtm_type == RTM_CHANGE) - rib_add (AFI_IP, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, 0, zebra_flags, - &p, NULL, &ggate, NULL, 0, 0, 0, 0, 0); - else - rib_delete (AFI_IP, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, - 0, zebra_flags, &p, NULL, &ggate, 0, 0); - } - if (dest.sa.sa_family == AF_INET6) - { - /* One day we might have a debug section here like one in the - * IPv4 case above. Just ignore own messages at the moment. - */ - if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid) - return; - struct prefix p; - ifindex_t ifindex = 0; - - p.family = AF_INET6; - p.u.prefix6 = dest.sin6.sin6_addr; - if (flags & RTF_HOST) - p.prefixlen = IPV6_MAX_PREFIXLEN; - else - p.prefixlen = ip6_masklen (mask.sin6.sin6_addr); + if ((rtm->rtm_type == RTM_ADD || rtm->rtm_type == RTM_CHANGE) + && !(flags & RTF_UP)) + return; + + /* This is connected route. */ + if (!(flags & RTF_GATEWAY)) + return; + + if (flags & RTF_PROTO1) + SET_FLAG(zebra_flags, ZEBRA_FLAG_SELFROUTE); + + /* This is persistent route. */ + if (flags & RTF_STATIC) + SET_FLAG(zebra_flags, ZEBRA_FLAG_STATIC); + + /* This is a reject or blackhole route */ + if (flags & RTF_REJECT) + SET_FLAG(zebra_flags, ZEBRA_FLAG_REJECT); + if (flags & RTF_BLACKHOLE) + SET_FLAG(zebra_flags, ZEBRA_FLAG_BLACKHOLE); + + if (dest.sa.sa_family == AF_INET) { + struct prefix p; + + p.family = AF_INET; + p.u.prefix4 = dest.sin.sin_addr; + if (flags & RTF_HOST) + p.prefixlen = IPV4_MAX_PREFIXLEN; + else + p.prefixlen = ip_masklen(mask.sin.sin_addr); + + /* Catch self originated messages and match them against our + * current RIB. + * At the same time, ignore unconfirmed messages, they should be + * tracked + * by rtm_write() and kernel_rtm_ipv4(). + */ + if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid) { + char buf[PREFIX_STRLEN], gate_buf[INET_ADDRSTRLEN]; + int ret; + if (!IS_ZEBRA_DEBUG_RIB) + return; + ret = rib_lookup_ipv4_route((struct prefix_ipv4 *)&p, + &gate, VRF_DEFAULT); + prefix2str(&p, buf, sizeof(buf)); + switch (rtm->rtm_type) { + case RTM_ADD: + case RTM_GET: + case RTM_CHANGE: + /* The kernel notifies us about a new route in + FIB created by us. + Do we have a correspondent entry in our RIB? + */ + switch (ret) { + case ZEBRA_RIB_NOTFOUND: + zlog_debug( + "%s: %s %s: desync: RR isn't yet in RIB, while already in FIB", + __func__, + lookup_msg(rtm_type_str, + rtm->rtm_type, NULL), + buf); + break; + case ZEBRA_RIB_FOUND_CONNECTED: + case ZEBRA_RIB_FOUND_NOGATE: + inet_ntop(AF_INET, &gate.sin.sin_addr, + gate_buf, INET_ADDRSTRLEN); + zlog_debug( + "%s: %s %s: desync: RR is in RIB, but gate differs (ours is %s)", + __func__, + lookup_msg(rtm_type_str, + rtm->rtm_type, NULL), + buf, gate_buf); + break; + case ZEBRA_RIB_FOUND_EXACT: /* RIB RR == FIB RR + */ + zlog_debug( + "%s: %s %s: done Ok", __func__, + lookup_msg(rtm_type_str, + rtm->rtm_type, NULL), + buf); + rib_lookup_and_dump( + (struct prefix_ipv4 *)&p, + VRF_DEFAULT); + return; + break; + } + break; + case RTM_DELETE: + /* The kernel notifies us about a route deleted + by us. Do we still + have it in the RIB? Do we have anything + instead? */ + switch (ret) { + case ZEBRA_RIB_FOUND_EXACT: + zlog_debug( + "%s: %s %s: desync: RR is still in RIB, while already not in FIB", + __func__, + lookup_msg(rtm_type_str, + rtm->rtm_type, NULL), + buf); + rib_lookup_and_dump( + (struct prefix_ipv4 *)&p, + VRF_DEFAULT); + break; + case ZEBRA_RIB_FOUND_CONNECTED: + case ZEBRA_RIB_FOUND_NOGATE: + zlog_debug( + "%s: %s %s: desync: RR is still in RIB, plus gate differs", + __func__, + lookup_msg(rtm_type_str, + rtm->rtm_type, NULL), + buf); + rib_lookup_and_dump( + (struct prefix_ipv4 *)&p, + VRF_DEFAULT); + break; + case ZEBRA_RIB_NOTFOUND: /* RIB RR == FIB RR */ + zlog_debug( + "%s: %s %s: done Ok", __func__, + lookup_msg(rtm_type_str, + rtm->rtm_type, NULL), + buf); + rib_lookup_and_dump( + (struct prefix_ipv4 *)&p, + VRF_DEFAULT); + return; + break; + } + break; + default: + zlog_debug( + "%s: %s: warning: loopback RTM of type %s received", + __func__, buf, + lookup_msg(rtm_type_str, rtm->rtm_type, + NULL)); + } + return; + } + + /* Change, delete the old prefix, we have no further information + * to specify the route really + */ + if (rtm->rtm_type == RTM_CHANGE) + rib_delete(AFI_IP, SAFI_UNICAST, VRF_DEFAULT, + ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL, + NULL, 0, 0); + + union g_addr ggate = {.ipv4 = gate.sin.sin_addr}; + if (rtm->rtm_type == RTM_GET || rtm->rtm_type == RTM_ADD + || rtm->rtm_type == RTM_CHANGE) + rib_add(AFI_IP, SAFI_UNICAST, VRF_DEFAULT, + ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL, + &ggate, NULL, 0, 0, 0, 0, 0); + else + rib_delete(AFI_IP, SAFI_UNICAST, VRF_DEFAULT, + ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL, + &ggate, 0, 0); + } + if (dest.sa.sa_family == AF_INET6) { + /* One day we might have a debug section here like one in the + * IPv4 case above. Just ignore own messages at the moment. + */ + if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid) + return; + struct prefix p; + ifindex_t ifindex = 0; + + p.family = AF_INET6; + p.u.prefix6 = dest.sin6.sin6_addr; + if (flags & RTF_HOST) + p.prefixlen = IPV6_MAX_PREFIXLEN; + else + p.prefixlen = ip6_masklen(mask.sin6.sin6_addr); #ifdef KAME - if (IN6_IS_ADDR_LINKLOCAL (&gate.sin6.sin6_addr)) - { - ifindex = IN6_LINKLOCAL_IFINDEX (gate.sin6.sin6_addr); - SET_IN6_LINKLOCAL_IFINDEX (gate.sin6.sin6_addr, 0); - } + if (IN6_IS_ADDR_LINKLOCAL(&gate.sin6.sin6_addr)) { + ifindex = IN6_LINKLOCAL_IFINDEX(gate.sin6.sin6_addr); + SET_IN6_LINKLOCAL_IFINDEX(gate.sin6.sin6_addr, 0); + } #endif /* KAME */ - /* CHANGE: delete the old prefix, we have no further information - * to specify the route really - */ - if (rtm->rtm_type == RTM_CHANGE) - rib_delete (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, - 0, zebra_flags, &p, NULL, NULL, 0, 0); - - union g_addr ggate = { .ipv6 = gate.sin6.sin6_addr }; - if (rtm->rtm_type == RTM_GET - || rtm->rtm_type == RTM_ADD - || rtm->rtm_type == RTM_CHANGE) - rib_add (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, - 0, zebra_flags, &p, NULL, &ggate, NULL, ifindex, - 0, 0, 0, 0); - else - rib_delete (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, - 0, zebra_flags, &p, NULL, &ggate, ifindex, 0); - } + /* CHANGE: delete the old prefix, we have no further information + * to specify the route really + */ + if (rtm->rtm_type == RTM_CHANGE) + rib_delete(AFI_IP6, SAFI_UNICAST, VRF_DEFAULT, + ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL, + NULL, 0, 0); + + union g_addr ggate = {.ipv6 = gate.sin6.sin6_addr}; + if (rtm->rtm_type == RTM_GET || rtm->rtm_type == RTM_ADD + || rtm->rtm_type == RTM_CHANGE) + rib_add(AFI_IP6, SAFI_UNICAST, VRF_DEFAULT, + ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL, + &ggate, NULL, ifindex, 0, 0, 0, 0); + else + rib_delete(AFI_IP6, SAFI_UNICAST, VRF_DEFAULT, + ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL, + &ggate, ifindex, 0); + } } /* Interface function for the kernel routing table updates. Support * for RTM_CHANGE will be needed. * Exported only for rt_socket.c */ -int -rtm_write (int message, - union sockunion *dest, - union sockunion *mask, - union sockunion *gate, - union sockunion *mpls, - unsigned int index, - int zebra_flags, - int metric) +int rtm_write(int message, union sockunion *dest, union sockunion *mask, + union sockunion *gate, union sockunion *mpls, unsigned int index, + int zebra_flags, int metric) { - int ret; - caddr_t pnt; - struct interface *ifp; - - /* Sequencial number of routing message. */ - static int msg_seq = 0; - - /* Struct of rt_msghdr and buffer for storing socket's data. */ - struct - { - struct rt_msghdr rtm; - char buf[512]; - } msg; - - if (routing_sock < 0) - return ZEBRA_ERR_EPERM; - - /* Clear and set rt_msghdr values */ - memset (&msg, 0, sizeof (struct rt_msghdr)); - msg.rtm.rtm_version = RTM_VERSION; - msg.rtm.rtm_type = message; - msg.rtm.rtm_seq = msg_seq++; - msg.rtm.rtm_addrs = RTA_DST; - msg.rtm.rtm_addrs |= RTA_GATEWAY; - msg.rtm.rtm_flags = RTF_UP; + int ret; + caddr_t pnt; + struct interface *ifp; + + /* Sequencial number of routing message. */ + static int msg_seq = 0; + + /* Struct of rt_msghdr and buffer for storing socket's data. */ + struct { + struct rt_msghdr rtm; + char buf[512]; + } msg; + + if (routing_sock < 0) + return ZEBRA_ERR_EPERM; + + /* Clear and set rt_msghdr values */ + memset(&msg, 0, sizeof(struct rt_msghdr)); + msg.rtm.rtm_version = RTM_VERSION; + msg.rtm.rtm_type = message; + msg.rtm.rtm_seq = msg_seq++; + msg.rtm.rtm_addrs = RTA_DST; + msg.rtm.rtm_addrs |= RTA_GATEWAY; + msg.rtm.rtm_flags = RTF_UP; #ifdef __OpenBSD__ - msg.rtm.rtm_flags |= RTF_MPATH; - msg.rtm.rtm_fmask = RTF_MPLS; + msg.rtm.rtm_flags |= RTF_MPATH; + msg.rtm.rtm_fmask = RTF_MPLS; #endif - msg.rtm.rtm_index = index; + msg.rtm.rtm_index = index; - if (metric != 0) - { - msg.rtm.rtm_rmx.rmx_hopcount = metric; - msg.rtm.rtm_inits |= RTV_HOPCOUNT; - } + if (metric != 0) { + msg.rtm.rtm_rmx.rmx_hopcount = metric; + msg.rtm.rtm_inits |= RTV_HOPCOUNT; + } - ifp = if_lookup_by_index (index, VRF_DEFAULT); + ifp = if_lookup_by_index(index, VRF_DEFAULT); - if (gate && (message == RTM_ADD || message == RTM_CHANGE)) - msg.rtm.rtm_flags |= RTF_GATEWAY; + if (gate && (message == RTM_ADD || message == RTM_CHANGE)) + msg.rtm.rtm_flags |= RTF_GATEWAY; - /* When RTF_CLONING is unavailable on BSD, should we set some - * other flag instead? - */ +/* When RTF_CLONING is unavailable on BSD, should we set some + * other flag instead? + */ #ifdef RTF_CLONING - if (! gate && (message == RTM_ADD || message == RTM_CHANGE) && ifp && - (ifp->flags & IFF_POINTOPOINT) == 0) - msg.rtm.rtm_flags |= RTF_CLONING; + if (!gate && (message == RTM_ADD || message == RTM_CHANGE) && ifp + && (ifp->flags & IFF_POINTOPOINT) == 0) + msg.rtm.rtm_flags |= RTF_CLONING; #endif /* RTF_CLONING */ - /* If no protocol specific gateway is specified, use link - address for gateway. */ - if (! gate) - { - if (!ifp) - { - char dest_buf[INET_ADDRSTRLEN] = "NULL", mask_buf[INET_ADDRSTRLEN] = "255.255.255.255"; - if (dest) - inet_ntop (AF_INET, &dest->sin.sin_addr, dest_buf, INET_ADDRSTRLEN); - if (mask) - inet_ntop (AF_INET, &mask->sin.sin_addr, mask_buf, INET_ADDRSTRLEN); - zlog_warn ("%s: %s/%s: gate == NULL and no gateway found for ifindex %d", - __func__, dest_buf, mask_buf, index); - return -1; - } - gate = (union sockunion *) &((struct zebra_if *)ifp->info)->sdl; - } - - if (mask) - msg.rtm.rtm_addrs |= RTA_NETMASK; - else if (message == RTM_ADD || message == RTM_CHANGE) - msg.rtm.rtm_flags |= RTF_HOST; + /* If no protocol specific gateway is specified, use link + address for gateway. */ + if (!gate) { + if (!ifp) { + char dest_buf[INET_ADDRSTRLEN] = "NULL", + mask_buf[INET_ADDRSTRLEN] = "255.255.255.255"; + if (dest) + inet_ntop(AF_INET, &dest->sin.sin_addr, + dest_buf, INET_ADDRSTRLEN); + if (mask) + inet_ntop(AF_INET, &mask->sin.sin_addr, + mask_buf, INET_ADDRSTRLEN); + zlog_warn( + "%s: %s/%s: gate == NULL and no gateway found for ifindex %d", + __func__, dest_buf, mask_buf, index); + return -1; + } + gate = (union sockunion *)&((struct zebra_if *)ifp->info)->sdl; + } + + if (mask) + msg.rtm.rtm_addrs |= RTA_NETMASK; + else if (message == RTM_ADD || message == RTM_CHANGE) + msg.rtm.rtm_flags |= RTF_HOST; #ifdef __OpenBSD__ - if (mpls) - { - msg.rtm.rtm_addrs |= RTA_SRC; - msg.rtm.rtm_flags |= RTF_MPLS; - - if (mpls->smpls.smpls_label != htonl (MPLS_IMP_NULL_LABEL << MPLS_LABEL_OFFSET)) - msg.rtm.rtm_mpls = MPLS_OP_PUSH; - } + if (mpls) { + msg.rtm.rtm_addrs |= RTA_SRC; + msg.rtm.rtm_flags |= RTF_MPLS; + + if (mpls->smpls.smpls_label + != htonl(MPLS_IMP_NULL_LABEL << MPLS_LABEL_OFFSET)) + msg.rtm.rtm_mpls = MPLS_OP_PUSH; + } #endif - /* Tagging route with flags */ - msg.rtm.rtm_flags |= (RTF_PROTO1); + /* Tagging route with flags */ + msg.rtm.rtm_flags |= (RTF_PROTO1); - /* Additional flags. */ - if (zebra_flags & ZEBRA_FLAG_BLACKHOLE) - msg.rtm.rtm_flags |= RTF_BLACKHOLE; - if (zebra_flags & ZEBRA_FLAG_REJECT) - msg.rtm.rtm_flags |= RTF_REJECT; + /* Additional flags. */ + if (zebra_flags & ZEBRA_FLAG_BLACKHOLE) + msg.rtm.rtm_flags |= RTF_BLACKHOLE; + if (zebra_flags & ZEBRA_FLAG_REJECT) + msg.rtm.rtm_flags |= RTF_REJECT; -#define SOCKADDRSET(X,R) \ - if (msg.rtm.rtm_addrs & (R)) \ - { \ - int len = SAROUNDUP (X); \ - memcpy (pnt, (caddr_t)(X), len); \ - pnt += len; \ - } +#define SOCKADDRSET(X, R) \ + if (msg.rtm.rtm_addrs & (R)) { \ + int len = SAROUNDUP(X); \ + memcpy(pnt, (caddr_t)(X), len); \ + pnt += len; \ + } - pnt = (caddr_t) msg.buf; + pnt = (caddr_t)msg.buf; - /* Write each socket data into rtm message buffer */ - SOCKADDRSET (dest, RTA_DST); - SOCKADDRSET (gate, RTA_GATEWAY); - SOCKADDRSET (mask, RTA_NETMASK); + /* Write each socket data into rtm message buffer */ + SOCKADDRSET(dest, RTA_DST); + SOCKADDRSET(gate, RTA_GATEWAY); + SOCKADDRSET(mask, RTA_NETMASK); #ifdef __OpenBSD__ - SOCKADDRSET (mpls, RTA_SRC); + SOCKADDRSET(mpls, RTA_SRC); #endif - msg.rtm.rtm_msglen = pnt - (caddr_t) &msg; - - ret = write (routing_sock, &msg, msg.rtm.rtm_msglen); - - if (ret != msg.rtm.rtm_msglen) - { - if (errno == EEXIST) - return ZEBRA_ERR_RTEXIST; - if (errno == ENETUNREACH) - return ZEBRA_ERR_RTUNREACH; - if (errno == ESRCH) - return ZEBRA_ERR_RTNOEXIST; - - zlog_warn ("%s: write : %s (%d)", __func__, safe_strerror (errno), errno); - return ZEBRA_ERR_KERNEL; - } - return ZEBRA_ERR_NOERROR; + msg.rtm.rtm_msglen = pnt - (caddr_t)&msg; + + ret = write(routing_sock, &msg, msg.rtm.rtm_msglen); + + if (ret != msg.rtm.rtm_msglen) { + if (errno == EEXIST) + return ZEBRA_ERR_RTEXIST; + if (errno == ENETUNREACH) + return ZEBRA_ERR_RTUNREACH; + if (errno == ESRCH) + return ZEBRA_ERR_RTNOEXIST; + + zlog_warn("%s: write : %s (%d)", __func__, safe_strerror(errno), + errno); + return ZEBRA_ERR_KERNEL; + } + return ZEBRA_ERR_NOERROR; } @@ -1199,14 +1216,14 @@ rtm_write (int message, #include "zebra/zserv.h" /* For debug purpose. */ -static void -rtmsg_debug (struct rt_msghdr *rtm) +static void rtmsg_debug(struct rt_msghdr *rtm) { - zlog_debug ("Kernel: Len: %d Type: %s", rtm->rtm_msglen, lookup_msg(rtm_type_str, rtm->rtm_type, NULL)); - rtm_flag_dump (rtm->rtm_flags); - zlog_debug ("Kernel: message seq %d", rtm->rtm_seq); - zlog_debug ("Kernel: pid %lld, rtm_addrs 0x%x", - (long long)rtm->rtm_pid, rtm->rtm_addrs); + zlog_debug("Kernel: Len: %d Type: %s", rtm->rtm_msglen, + lookup_msg(rtm_type_str, rtm->rtm_type, NULL)); + rtm_flag_dump(rtm->rtm_flags); + zlog_debug("Kernel: message seq %d", rtm->rtm_seq); + zlog_debug("Kernel: pid %lld, rtm_addrs 0x%x", (long long)rtm->rtm_pid, + rtm->rtm_addrs); } /* This is pretty gross, better suggestions welcome -- mhandler */ @@ -1219,154 +1236,143 @@ rtmsg_debug (struct rt_msghdr *rtm) #endif /* RTAX_MAX */ /* Kernel routing table and interface updates via routing socket. */ -static int -kernel_read (struct thread *thread) +static int kernel_read(struct thread *thread) { - int sock; - int nbytes; - struct rt_msghdr *rtm; - - /* - * This must be big enough for any message the kernel might send. - * Rather than determining how many sockaddrs of what size might be - * in each particular message, just use RTAX_MAX of sockaddr_storage - * for each. Note that the sockaddrs must be after each message - * definition, or rather after whichever happens to be the largest, - * since the buffer needs to be big enough for a message and the - * sockaddrs together. - */ - union - { - /* Routing information. */ - struct - { - struct rt_msghdr rtm; - struct sockaddr_storage addr[RTAX_MAX]; - } r; - - /* Interface information. */ - struct - { - struct if_msghdr ifm; - struct sockaddr_storage addr[RTAX_MAX]; - } im; - - /* Interface address information. */ - struct - { - struct ifa_msghdr ifa; - struct sockaddr_storage addr[RTAX_MAX]; - } ia; + int sock; + int nbytes; + struct rt_msghdr *rtm; + + /* + * This must be big enough for any message the kernel might send. + * Rather than determining how many sockaddrs of what size might be + * in each particular message, just use RTAX_MAX of sockaddr_storage + * for each. Note that the sockaddrs must be after each message + * definition, or rather after whichever happens to be the largest, + * since the buffer needs to be big enough for a message and the + * sockaddrs together. + */ + union { + /* Routing information. */ + struct { + struct rt_msghdr rtm; + struct sockaddr_storage addr[RTAX_MAX]; + } r; + + /* Interface information. */ + struct { + struct if_msghdr ifm; + struct sockaddr_storage addr[RTAX_MAX]; + } im; + + /* Interface address information. */ + struct { + struct ifa_msghdr ifa; + struct sockaddr_storage addr[RTAX_MAX]; + } ia; #ifdef RTM_IFANNOUNCE - /* Interface arrival/departure */ - struct - { - struct if_announcemsghdr ifan; - struct sockaddr_storage addr[RTAX_MAX]; - } ian; + /* Interface arrival/departure */ + struct { + struct if_announcemsghdr ifan; + struct sockaddr_storage addr[RTAX_MAX]; + } ian; #endif /* RTM_IFANNOUNCE */ - } buf; + } buf; - /* Fetch routing socket. */ - sock = THREAD_FD (thread); + /* Fetch routing socket. */ + sock = THREAD_FD(thread); - nbytes= read (sock, &buf, sizeof buf); + nbytes = read(sock, &buf, sizeof buf); - if (nbytes <= 0) - { - if (nbytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN) - zlog_warn ("routing socket error: %s", safe_strerror (errno)); - return 0; - } + if (nbytes <= 0) { + if (nbytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN) + zlog_warn("routing socket error: %s", + safe_strerror(errno)); + return 0; + } - thread_add_read(zebrad.master, kernel_read, NULL, sock, NULL); + thread_add_read(zebrad.master, kernel_read, NULL, sock, NULL); - if (IS_ZEBRA_DEBUG_KERNEL) - rtmsg_debug (&buf.r.rtm); + if (IS_ZEBRA_DEBUG_KERNEL) + rtmsg_debug(&buf.r.rtm); - rtm = &buf.r.rtm; + rtm = &buf.r.rtm; - /* - * Ensure that we didn't drop any data, so that processing routines - * can assume they have the whole message. - */ - if (rtm->rtm_msglen != nbytes) - { - zlog_warn ("kernel_read: rtm->rtm_msglen %d, nbytes %d, type %d\n", - rtm->rtm_msglen, nbytes, rtm->rtm_type); - return -1; - } - - switch (rtm->rtm_type) - { - case RTM_ADD: - case RTM_DELETE: - case RTM_CHANGE: - rtm_read (rtm); - break; - case RTM_IFINFO: - ifm_read (&buf.im.ifm); - break; - case RTM_NEWADDR: - case RTM_DELADDR: - ifam_read (&buf.ia.ifa); - break; + /* + * Ensure that we didn't drop any data, so that processing routines + * can assume they have the whole message. + */ + if (rtm->rtm_msglen != nbytes) { + zlog_warn( + "kernel_read: rtm->rtm_msglen %d, nbytes %d, type %d\n", + rtm->rtm_msglen, nbytes, rtm->rtm_type); + return -1; + } + + switch (rtm->rtm_type) { + case RTM_ADD: + case RTM_DELETE: + case RTM_CHANGE: + rtm_read(rtm); + break; + case RTM_IFINFO: + ifm_read(&buf.im.ifm); + break; + case RTM_NEWADDR: + case RTM_DELADDR: + ifam_read(&buf.ia.ifa); + break; #ifdef RTM_IFANNOUNCE - case RTM_IFANNOUNCE: - ifan_read (&buf.ian.ifan); - break; + case RTM_IFANNOUNCE: + ifan_read(&buf.ian.ifan); + break; #endif /* RTM_IFANNOUNCE */ - default: - if (IS_ZEBRA_DEBUG_KERNEL) - zlog_debug("Unprocessed RTM_type: %d", rtm->rtm_type); - break; - } - return 0; + default: + if (IS_ZEBRA_DEBUG_KERNEL) + zlog_debug("Unprocessed RTM_type: %d", rtm->rtm_type); + break; + } + return 0; } /* Make routing socket. */ -static void -routing_socket (struct zebra_ns *zns) +static void routing_socket(struct zebra_ns *zns) { - if ( zserv_privs.change (ZPRIVS_RAISE) ) - zlog_err ("routing_socket: Can't raise privileges"); - - routing_sock = socket (AF_ROUTE, SOCK_RAW, 0); - - if (routing_sock < 0) - { - if ( zserv_privs.change (ZPRIVS_LOWER) ) - zlog_err ("routing_socket: Can't lower privileges"); - zlog_warn ("Can't init kernel routing socket"); - return; - } - - /* XXX: Socket should be NONBLOCK, however as we currently - * discard failed writes, this will lead to inconsistencies. - * For now, socket must be blocking. - */ - /*if (fcntl (routing_sock, F_SETFL, O_NONBLOCK) < 0) - zlog_warn ("Can't set O_NONBLOCK to routing socket");*/ - - if ( zserv_privs.change (ZPRIVS_LOWER) ) - zlog_err ("routing_socket: Can't lower privileges"); - - /* kernel_read needs rewrite. */ - thread_add_read(zebrad.master, kernel_read, NULL, routing_sock, NULL); + if (zserv_privs.change(ZPRIVS_RAISE)) + zlog_err("routing_socket: Can't raise privileges"); + + routing_sock = socket(AF_ROUTE, SOCK_RAW, 0); + + if (routing_sock < 0) { + if (zserv_privs.change(ZPRIVS_LOWER)) + zlog_err("routing_socket: Can't lower privileges"); + zlog_warn("Can't init kernel routing socket"); + return; + } + + /* XXX: Socket should be NONBLOCK, however as we currently + * discard failed writes, this will lead to inconsistencies. + * For now, socket must be blocking. + */ + /*if (fcntl (routing_sock, F_SETFL, O_NONBLOCK) < 0) + zlog_warn ("Can't set O_NONBLOCK to routing socket");*/ + + if (zserv_privs.change(ZPRIVS_LOWER)) + zlog_err("routing_socket: Can't lower privileges"); + + /* kernel_read needs rewrite. */ + thread_add_read(zebrad.master, kernel_read, NULL, routing_sock, NULL); } /* Exported interface function. This function simply calls routing_socket (). */ -void -kernel_init (struct zebra_ns *zns) +void kernel_init(struct zebra_ns *zns) { - routing_socket (zns); + routing_socket(zns); } -void -kernel_terminate (struct zebra_ns *zns) +void kernel_terminate(struct zebra_ns *zns) { - return; + return; } |