diff options
Diffstat (limited to 'zebra/router-id.c')
| -rw-r--r-- | zebra/router-id.c | 614 |
1 files changed, 614 insertions, 0 deletions
diff --git a/zebra/router-id.c b/zebra/router-id.c new file mode 100644 index 0000000..9f56cf0 --- /dev/null +++ b/zebra/router-id.c @@ -0,0 +1,614 @@ +/* + * Router ID for zebra daemon. + * + * Copyright (C) 2004 James R. Leu + * + * This file is part of Quagga routing suite. + * + * Quagga is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * Quagga is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; see the file COPYING; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <zebra.h> + +#include "if.h" +#include "vty.h" +#include "sockunion.h" +#include "prefix.h" +#include "stream.h" +#include "command.h" +#include "memory.h" +#include "ioctl.h" +#include "connected.h" +#include "network.h" +#include "log.h" +#include "table.h" +#include "rib.h" +#include "vrf.h" + +#include "zebra/zebra_router.h" +#include "zebra/zapi_msg.h" +#include "zebra/zebra_vrf.h" +#include "zebra/router-id.h" +#include "zebra/redistribute.h" + +static struct connected *router_id_find_node(struct list *l, + struct connected *ifc) +{ + struct listnode *node; + struct connected *c; + + for (ALL_LIST_ELEMENTS_RO(l, node, c)) + if (prefix_same(ifc->address, c->address)) + return c; + + return NULL; +} + +static int router_id_bad_address(struct connected *ifc) +{ + /* non-redistributable addresses shouldn't be used for RIDs either */ + if (!zebra_check_addr(ifc->address)) + return 1; + + return 0; +} + +static bool router_id_v6_is_any(struct prefix *p) +{ + return memcmp(&p->u.prefix6, &in6addr_any, sizeof(struct in6_addr)) + == 0; +} + +int router_id_get(afi_t afi, struct prefix *p, struct zebra_vrf *zvrf) +{ + struct listnode *node; + struct connected *c; + struct in6_addr *addr = NULL; + + switch (afi) { + case AFI_IP: + p->u.prefix4.s_addr = INADDR_ANY; + p->family = AF_INET; + p->prefixlen = IPV4_MAX_BITLEN; + if (zvrf->rid_user_assigned.u.prefix4.s_addr != INADDR_ANY) + p->u.prefix4.s_addr = + zvrf->rid_user_assigned.u.prefix4.s_addr; + else if (!list_isempty(zvrf->rid_lo_sorted_list)) { + node = listtail(zvrf->rid_lo_sorted_list); + c = listgetdata(node); + p->u.prefix4.s_addr = c->address->u.prefix4.s_addr; + } else if (!list_isempty(zvrf->rid_all_sorted_list)) { + node = listtail(zvrf->rid_all_sorted_list); + c = listgetdata(node); + p->u.prefix4.s_addr = c->address->u.prefix4.s_addr; + } + return 0; + case AFI_IP6: + p->u.prefix6 = in6addr_any; + p->family = AF_INET6; + p->prefixlen = IPV6_MAX_BITLEN; + if (!router_id_v6_is_any(&zvrf->rid6_user_assigned)) + addr = &zvrf->rid6_user_assigned.u.prefix6; + else if (!list_isempty(zvrf->rid6_lo_sorted_list)) { + node = listtail(zvrf->rid6_lo_sorted_list); + c = listgetdata(node); + addr = &c->address->u.prefix6; + } else if (!list_isempty(zvrf->rid6_all_sorted_list)) { + node = listtail(zvrf->rid6_all_sorted_list); + c = listgetdata(node); + addr = &c->address->u.prefix6; + } + if (addr) + memcpy(&p->u.prefix6, addr, sizeof(struct in6_addr)); + return 0; + default: + return -1; + } +} + +static int router_id_set(afi_t afi, struct prefix *p, struct zebra_vrf *zvrf) +{ + struct prefix after, before; + struct listnode *node; + struct zserv *client; + + router_id_get(afi, &before, zvrf); + + switch (afi) { + case AFI_IP: + zvrf->rid_user_assigned.u.prefix4.s_addr = p->u.prefix4.s_addr; + break; + case AFI_IP6: + zvrf->rid6_user_assigned.u.prefix6 = p->u.prefix6; + break; + default: + return -1; + } + + router_id_get(afi, &after, zvrf); + + /* + * If we've been told that the router-id is exactly the same + * do we need to really do anything here? + */ + if (prefix_same(&before, &after)) + return 0; + + for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) + zsend_router_id_update(client, afi, &after, zvrf->vrf->vrf_id); + + return 0; +} + +void router_id_add_address(struct connected *ifc) +{ + struct list *l = NULL; + struct listnode *node; + struct prefix before; + struct prefix after; + struct zserv *client; + struct zebra_vrf *zvrf = ifc->ifp->vrf->info; + afi_t afi; + struct list *rid_lo; + struct list *rid_all; + + if (router_id_bad_address(ifc)) + return; + + switch (ifc->address->family) { + case AF_INET: + afi = AFI_IP; + rid_lo = zvrf->rid_lo_sorted_list; + rid_all = zvrf->rid_all_sorted_list; + break; + case AF_INET6: + afi = AFI_IP6; + rid_lo = zvrf->rid6_lo_sorted_list; + rid_all = zvrf->rid6_all_sorted_list; + break; + default: + return; + } + + router_id_get(afi, &before, zvrf); + + l = if_is_loopback(ifc->ifp) ? rid_lo : rid_all; + + if (!router_id_find_node(l, ifc)) + listnode_add_sort(l, ifc); + + router_id_get(afi, &after, zvrf); + + if (prefix_same(&before, &after)) + return; + + for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) + zsend_router_id_update(client, afi, &after, zvrf_id(zvrf)); +} + +void router_id_del_address(struct connected *ifc) +{ + struct connected *c; + struct list *l; + struct prefix after; + struct prefix before; + struct listnode *node; + struct zserv *client; + struct zebra_vrf *zvrf = ifc->ifp->vrf->info; + afi_t afi; + struct list *rid_lo; + struct list *rid_all; + + if (router_id_bad_address(ifc)) + return; + + switch (ifc->address->family) { + case AF_INET: + afi = AFI_IP; + rid_lo = zvrf->rid_lo_sorted_list; + rid_all = zvrf->rid_all_sorted_list; + break; + case AF_INET6: + afi = AFI_IP6; + rid_lo = zvrf->rid6_lo_sorted_list; + rid_all = zvrf->rid6_all_sorted_list; + break; + default: + return; + } + + router_id_get(afi, &before, zvrf); + + if (if_is_loopback(ifc->ifp)) + l = rid_lo; + else + l = rid_all; + + if ((c = router_id_find_node(l, ifc))) + listnode_delete(l, c); + + router_id_get(afi, &after, zvrf); + + if (prefix_same(&before, &after)) + return; + + for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) + zsend_router_id_update(client, afi, &after, zvrf_id(zvrf)); +} + +void router_id_write(struct vty *vty, struct zebra_vrf *zvrf) +{ + char space[2]; + + memset(space, 0, sizeof(space)); + + if (zvrf_id(zvrf) != VRF_DEFAULT) + snprintf(space, sizeof(space), "%s", " "); + + if (zvrf->rid_user_assigned.u.prefix4.s_addr != INADDR_ANY) { + vty_out(vty, "%sip router-id %pI4\n", space, + &zvrf->rid_user_assigned.u.prefix4); + } + if (!router_id_v6_is_any(&zvrf->rid6_user_assigned)) { + vty_out(vty, "%sipv6 router-id %pI6\n", space, + &zvrf->rid_user_assigned.u.prefix6); + } +} + +DEFUN (ip_router_id, + ip_router_id_cmd, + "ip router-id A.B.C.D vrf NAME", + IP_STR + "Manually set the router-id\n" + "IP address to use for router-id\n" + VRF_CMD_HELP_STR) +{ + int idx = 0; + struct prefix rid; + vrf_id_t vrf_id; + struct zebra_vrf *zvrf; + + argv_find(argv, argc, "A.B.C.D", &idx); + + if (!inet_pton(AF_INET, argv[idx]->arg, &rid.u.prefix4)) + return CMD_WARNING_CONFIG_FAILED; + + rid.prefixlen = IPV4_MAX_BITLEN; + rid.family = AF_INET; + + argv_find(argv, argc, "NAME", &idx); + VRF_GET_ID(vrf_id, argv[idx]->arg, false); + + zvrf = vrf_info_lookup(vrf_id); + router_id_set(AFI_IP, &rid, zvrf); + + return CMD_SUCCESS; +} + +ALIAS (ip_router_id, + router_id_cmd, + "router-id A.B.C.D vrf NAME", + "Manually set the router-id\n" + "IP address to use for router-id\n" + VRF_CMD_HELP_STR); + +DEFUN (ipv6_router_id, + ipv6_router_id_cmd, + "ipv6 router-id X:X::X:X vrf NAME", + IPV6_STR + "Manually set the router-id\n" + "IPv6 address to use for router-id\n" + VRF_CMD_HELP_STR) +{ + int idx = 0; + struct prefix rid; + vrf_id_t vrf_id; + struct zebra_vrf *zvrf; + + argv_find(argv, argc, "X:X::X:X", &idx); + + if (!inet_pton(AF_INET6, argv[idx]->arg, &rid.u.prefix6)) + return CMD_WARNING_CONFIG_FAILED; + + rid.prefixlen = IPV6_MAX_BITLEN; + rid.family = AF_INET6; + + argv_find(argv, argc, "NAME", &idx); + VRF_GET_ID(vrf_id, argv[idx]->arg, false); + + zvrf = vrf_info_lookup(vrf_id); + router_id_set(AFI_IP6, &rid, zvrf); + + return CMD_SUCCESS; +} + + +DEFUN (ip_router_id_in_vrf, + ip_router_id_in_vrf_cmd, + "ip router-id A.B.C.D", + IP_STR + "Manually set the router-id\n" + "IP address to use for router-id\n") +{ + ZEBRA_DECLVAR_CONTEXT_VRF(vrf, zvrf); + int idx = 0; + struct prefix rid; + + argv_find(argv, argc, "A.B.C.D", &idx); + + if (!inet_pton(AF_INET, argv[idx]->arg, &rid.u.prefix4)) + return CMD_WARNING_CONFIG_FAILED; + + rid.prefixlen = IPV4_MAX_BITLEN; + rid.family = AF_INET; + + router_id_set(AFI_IP, &rid, zvrf); + + return CMD_SUCCESS; +} + +ALIAS (ip_router_id_in_vrf, + router_id_in_vrf_cmd, + "router-id A.B.C.D", + "Manually set the router-id\n" + "IP address to use for router-id\n"); + +DEFUN (ipv6_router_id_in_vrf, + ipv6_router_id_in_vrf_cmd, + "ipv6 router-id X:X::X:X", + IP6_STR + "Manually set the IPv6 router-id\n" + "IPV6 address to use for router-id\n") +{ + ZEBRA_DECLVAR_CONTEXT_VRF(vrf, zvrf); + int idx = 0; + struct prefix rid; + + argv_find(argv, argc, "X:X::X:X", &idx); + + if (!inet_pton(AF_INET6, argv[idx]->arg, &rid.u.prefix6)) + return CMD_WARNING_CONFIG_FAILED; + + rid.prefixlen = IPV6_MAX_BITLEN; + rid.family = AF_INET6; + + router_id_set(AFI_IP6, &rid, zvrf); + + return CMD_SUCCESS; +} + +DEFUN (no_ip_router_id, + no_ip_router_id_cmd, + "no ip router-id [A.B.C.D vrf NAME]", + NO_STR + IP_STR + "Remove the manually configured router-id\n" + "IP address to use for router-id\n" + VRF_CMD_HELP_STR) +{ + int idx = 0; + struct prefix rid; + vrf_id_t vrf_id = VRF_DEFAULT; + struct zebra_vrf *zvrf; + + rid.u.prefix4.s_addr = 0; + rid.prefixlen = 0; + rid.family = AF_INET; + + if (argv_find(argv, argc, "NAME", &idx)) + VRF_GET_ID(vrf_id, argv[idx]->arg, false); + + zvrf = vrf_info_lookup(vrf_id); + router_id_set(AFI_IP, &rid, zvrf); + + return CMD_SUCCESS; +} + +ALIAS (no_ip_router_id, + no_router_id_cmd, + "no router-id [A.B.C.D vrf NAME]", + NO_STR + "Remove the manually configured router-id\n" + "IP address to use for router-id\n" + VRF_CMD_HELP_STR); + +DEFUN (no_ipv6_router_id, + no_ipv6_router_id_cmd, + "no ipv6 router-id [X:X::X:X vrf NAME]", + NO_STR + IPV6_STR + "Remove the manually configured IPv6 router-id\n" + "IPv6 address to use for router-id\n" + VRF_CMD_HELP_STR) +{ + int idx = 0; + struct prefix rid; + vrf_id_t vrf_id = VRF_DEFAULT; + struct zebra_vrf *zvrf; + + memset(&rid, 0, sizeof(rid)); + rid.family = AF_INET; + + if (argv_find(argv, argc, "NAME", &idx)) + VRF_GET_ID(vrf_id, argv[idx]->arg, false); + + zvrf = vrf_info_lookup(vrf_id); + router_id_set(AFI_IP6, &rid, zvrf); + + return CMD_SUCCESS; +} + +DEFUN (no_ip_router_id_in_vrf, + no_ip_router_id_in_vrf_cmd, + "no ip router-id [A.B.C.D]", + NO_STR + IP_STR + "Remove the manually configured router-id\n" + "IP address to use for router-id\n") +{ + ZEBRA_DECLVAR_CONTEXT_VRF(vrf, zvrf); + + struct prefix rid; + + rid.u.prefix4.s_addr = 0; + rid.prefixlen = 0; + rid.family = AF_INET; + + router_id_set(AFI_IP, &rid, zvrf); + + return CMD_SUCCESS; +} + +ALIAS (no_ip_router_id_in_vrf, + no_router_id_in_vrf_cmd, + "no router-id [A.B.C.D]", + NO_STR + "Remove the manually configured router-id\n" + "IP address to use for router-id\n"); + +DEFUN (no_ipv6_router_id_in_vrf, + no_ipv6_router_id_in_vrf_cmd, + "no ipv6 router-id [X:X::X:X]", + NO_STR + IP6_STR + "Remove the manually configured IPv6 router-id\n" + "IPv6 address to use for router-id\n") +{ + ZEBRA_DECLVAR_CONTEXT_VRF(vrf, zvrf); + + struct prefix rid; + + memset(&rid, 0, sizeof(rid)); + rid.family = AF_INET; + + router_id_set(AFI_IP6, &rid, zvrf); + + return CMD_SUCCESS; +} + +DEFUN (show_ip_router_id, + show_ip_router_id_cmd, + "show [ip|ipv6] router-id [vrf NAME]", + SHOW_STR + IP_STR + IPV6_STR + "Show the configured router-id\n" + VRF_CMD_HELP_STR) +{ + int idx = 0; + vrf_id_t vrf_id = VRF_DEFAULT; + struct zebra_vrf *zvrf; + const char *vrf_name = "default"; + char addr_name[INET6_ADDRSTRLEN]; + int is_ipv6 = 0; + + is_ipv6 = argv_find(argv, argc, "ipv6", &idx); + + if (argv_find(argv, argc, "NAME", &idx)) { + VRF_GET_ID(vrf_id, argv[idx]->arg, false); + vrf_name = argv[idx]->arg; + } + + zvrf = vrf_info_lookup(vrf_id); + + if (zvrf != NULL) { + if (is_ipv6) { + if (router_id_v6_is_any(&zvrf->rid6_user_assigned)) + return CMD_SUCCESS; + inet_ntop(AF_INET6, &zvrf->rid6_user_assigned.u.prefix6, + addr_name, sizeof(addr_name)); + } else { + if (zvrf->rid_user_assigned.u.prefix4.s_addr + == INADDR_ANY) + return CMD_SUCCESS; + inet_ntop(AF_INET, &zvrf->rid_user_assigned.u.prefix4, + addr_name, sizeof(addr_name)); + } + + vty_out(vty, "zebra:\n"); + vty_out(vty, " router-id %s vrf %s\n", addr_name, vrf_name); + } + + return CMD_SUCCESS; +} + +static int router_id_cmp(void *a, void *b) +{ + const struct connected *ifa = (const struct connected *)a; + const struct connected *ifb = (const struct connected *)b; + + return IPV4_ADDR_CMP(&ifa->address->u.prefix4.s_addr, + &ifb->address->u.prefix4.s_addr); +} + +static int router_id_v6_cmp(void *a, void *b) +{ + const struct connected *ifa = (const struct connected *)a; + const struct connected *ifb = (const struct connected *)b; + + return IPV6_ADDR_CMP(&ifa->address->u.prefix6, + &ifb->address->u.prefix6); +} + +void router_id_cmd_init(void) +{ + install_element(CONFIG_NODE, &ip_router_id_cmd); + install_element(CONFIG_NODE, &router_id_cmd); + install_element(CONFIG_NODE, &ipv6_router_id_cmd); + install_element(CONFIG_NODE, &no_ip_router_id_cmd); + install_element(CONFIG_NODE, &no_router_id_cmd); + install_element(CONFIG_NODE, &ip_router_id_in_vrf_cmd); + install_element(VRF_NODE, &ip_router_id_in_vrf_cmd); + install_element(CONFIG_NODE, &router_id_in_vrf_cmd); + install_element(VRF_NODE, &router_id_in_vrf_cmd); + install_element(CONFIG_NODE, &ipv6_router_id_in_vrf_cmd); + install_element(VRF_NODE, &ipv6_router_id_in_vrf_cmd); + install_element(CONFIG_NODE, &no_ipv6_router_id_cmd); + install_element(CONFIG_NODE, &no_ip_router_id_in_vrf_cmd); + install_element(VRF_NODE, &no_ip_router_id_in_vrf_cmd); + install_element(CONFIG_NODE, &no_router_id_in_vrf_cmd); + install_element(VRF_NODE, &no_router_id_in_vrf_cmd); + install_element(CONFIG_NODE, &no_ipv6_router_id_in_vrf_cmd); + install_element(VRF_NODE, &no_ipv6_router_id_in_vrf_cmd); + install_element(VIEW_NODE, &show_ip_router_id_cmd); +} + +void router_id_init(struct zebra_vrf *zvrf) +{ + zvrf->rid_all_sorted_list = &zvrf->_rid_all_sorted_list; + zvrf->rid_lo_sorted_list = &zvrf->_rid_lo_sorted_list; + zvrf->rid6_all_sorted_list = &zvrf->_rid6_all_sorted_list; + zvrf->rid6_lo_sorted_list = &zvrf->_rid6_lo_sorted_list; + + memset(zvrf->rid_all_sorted_list, 0, + sizeof(zvrf->_rid_all_sorted_list)); + memset(zvrf->rid_lo_sorted_list, 0, sizeof(zvrf->_rid_lo_sorted_list)); + memset(&zvrf->rid_user_assigned, 0, sizeof(zvrf->rid_user_assigned)); + memset(zvrf->rid6_all_sorted_list, 0, + sizeof(zvrf->_rid6_all_sorted_list)); + memset(zvrf->rid6_lo_sorted_list, 0, + sizeof(zvrf->_rid6_lo_sorted_list)); + memset(&zvrf->rid6_user_assigned, 0, sizeof(zvrf->rid6_user_assigned)); + + zvrf->rid_all_sorted_list->cmp = router_id_cmp; + zvrf->rid_lo_sorted_list->cmp = router_id_cmp; + zvrf->rid6_all_sorted_list->cmp = router_id_v6_cmp; + zvrf->rid6_lo_sorted_list->cmp = router_id_v6_cmp; + + zvrf->rid_user_assigned.family = AF_INET; + zvrf->rid_user_assigned.prefixlen = IPV4_MAX_BITLEN; + zvrf->rid6_user_assigned.family = AF_INET6; + zvrf->rid6_user_assigned.prefixlen = IPV6_MAX_BITLEN; +} |