rip_zebra.c
上传用户:xiaozhuqw
上传日期:2009-11-15
资源大小:1338k
文件大小:18k
- /* RIPd and zebra interface.
- * Copyright (C) 1997, 1999 Kunihiro Ishiguro <kunihiro@zebra.org>
- *
- * This file is part of GNU Zebra.
- *
- * GNU Zebra 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.
- *
- * GNU Zebra 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 GNU Zebra; see the file COPYING. If not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
- */
- #include <zebra.h>
- #include "command.h"
- #include "prefix.h"
- #include "stream.h"
- #include "routemap.h"
- #include "zclient.h"
- #include "log.h"
- #include "ripd/ripd.h"
- #include "ripd/rip_debug.h"
- /* All information about zebra. */
- struct zclient *zclient = NULL;
- /* Callback prototypes for zebra client service. */
- int rip_interface_add (int, struct zclient *, zebra_size_t);
- int rip_interface_delete (int, struct zclient *, zebra_size_t);
- int rip_interface_address_add (int, struct zclient *, zebra_size_t);
- int rip_interface_address_delete (int, struct zclient *, zebra_size_t);
- int rip_interface_up (int, struct zclient *, zebra_size_t);
- int rip_interface_down (int, struct zclient *, zebra_size_t);
- /* RIPd to zebra command interface. */
- void
- rip_zebra_ipv4_add (struct prefix_ipv4 *p, struct in_addr *nexthop,
- u_int32_t metric, u_char distance)
- {
- struct zapi_ipv4 api;
- if (zclient->redist[ZEBRA_ROUTE_RIP])
- {
- api.type = ZEBRA_ROUTE_RIP;
- api.flags = 0;
- api.message = 0;
- SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP);
- api.nexthop_num = 1;
- api.nexthop = &nexthop;
- api.ifindex_num = 0;
- SET_FLAG (api.message, ZAPI_MESSAGE_METRIC);
- api.metric = metric;
- if (distance && distance != ZEBRA_RIP_DISTANCE_DEFAULT)
- {
- SET_FLAG (api.message, ZAPI_MESSAGE_DISTANCE);
- api.distance = distance;
- }
- zapi_ipv4_add (zclient, p, &api);
- rip_global_route_changes++;
- }
- }
- void
- rip_zebra_ipv4_delete (struct prefix_ipv4 *p, struct in_addr *nexthop,
- u_int32_t metric)
- {
- struct zapi_ipv4 api;
- if (zclient->redist[ZEBRA_ROUTE_RIP])
- {
- api.type = ZEBRA_ROUTE_RIP;
- api.flags = 0;
- api.message = 0;
- SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP);
- api.nexthop_num = 1;
- api.nexthop = &nexthop;
- api.ifindex_num = 0;
- SET_FLAG (api.message, ZAPI_MESSAGE_METRIC);
- api.metric = metric;
- zapi_ipv4_delete (zclient, p, &api);
- rip_global_route_changes++;
- }
- }
- /* Zebra route add and delete treatment. */
- int
- rip_zebra_read_ipv4 (int command, struct zclient *zclient, zebra_size_t length)
- {
- struct stream *s;
- struct zapi_ipv4 api;
- unsigned long ifindex;
- struct in_addr nexthop;
- struct prefix_ipv4 p;
-
- s = zclient->ibuf;
- ifindex = 0;
- nexthop.s_addr = 0;
- /* Type, flags, message. */
- api.type = stream_getc (s);
- api.flags = stream_getc (s);
- api.message = stream_getc (s);
- /* IPv4 prefix. */
- memset (&p, 0, sizeof (struct prefix_ipv4));
- p.family = AF_INET;
- p.prefixlen = stream_getc (s);
- stream_get (&p.prefix, s, PSIZE (p.prefixlen));
- /* Nexthop, ifindex, distance, metric. */
- if (CHECK_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP))
- {
- api.nexthop_num = stream_getc (s);
- nexthop.s_addr = stream_get_ipv4 (s);
- }
- if (CHECK_FLAG (api.message, ZAPI_MESSAGE_IFINDEX))
- {
- api.ifindex_num = stream_getc (s);
- ifindex = stream_getl (s);
- }
- if (CHECK_FLAG (api.message, ZAPI_MESSAGE_DISTANCE))
- api.distance = stream_getc (s);
- if (CHECK_FLAG (api.message, ZAPI_MESSAGE_METRIC))
- api.metric = stream_getl (s);
- /* Then fetch IPv4 prefixes. */
- if (command == ZEBRA_IPV4_ROUTE_ADD)
- rip_redistribute_add (api.type, RIP_ROUTE_REDISTRIBUTE, &p, ifindex, &nexthop);
- else
- rip_redistribute_delete (api.type, RIP_ROUTE_REDISTRIBUTE, &p, ifindex);
- return 0;
- }
- void
- rip_zclient_reset ()
- {
- zclient_reset (zclient);
- }
- /* RIP route-map set for redistribution */
- void
- rip_routemap_set (int type, char *name)
- {
- if (rip->route_map[type].name)
- free(rip->route_map[type].name);
- rip->route_map[type].name = strdup (name);
- rip->route_map[type].map = route_map_lookup_by_name (name);
- }
- void
- rip_redistribute_metric_set (int type, int metric)
- {
- rip->route_map[type].metric_config = 1;
- rip->route_map[type].metric = metric;
- }
- int
- rip_metric_unset (int type,int metric)
- {
- #define DONT_CARE_METRIC_RIP 17
- if (metric != DONT_CARE_METRIC_RIP &&
- rip->route_map[type].metric != metric)
- return 1;
- rip->route_map[type].metric_config = 0;
- rip->route_map[type].metric = 0;
- return 0;
- }
- /* RIP route-map unset for redistribution */
- int
- rip_routemap_unset (int type,char *name)
- {
- if (! rip->route_map[type].name ||
- (name != NULL && strcmp(rip->route_map[type].name,name)))
- return 1;
- free (rip->route_map[type].name);
- rip->route_map[type].name = NULL;
- rip->route_map[type].map = NULL;
- return 0;
- }
- /* Redistribution types */
- static struct {
- int type;
- int str_min_len;
- char *str;
- } redist_type[] = {
- {ZEBRA_ROUTE_KERNEL, 1, "kernel"},
- {ZEBRA_ROUTE_CONNECT, 1, "connected"},
- {ZEBRA_ROUTE_STATIC, 1, "static"},
- {ZEBRA_ROUTE_OSPF, 1, "ospf"},
- {ZEBRA_ROUTE_BGP, 1, "bgp"},
- {0, 0, NULL}
- };
- DEFUN (router_zebra,
- router_zebra_cmd,
- "router zebra",
- "Enable a routing processn"
- "Make connection to zebra daemonn")
- {
- vty->node = ZEBRA_NODE;
- zclient->enable = 1;
- zclient_start (zclient);
- return CMD_SUCCESS;
- }
- DEFUN (no_router_zebra,
- no_router_zebra_cmd,
- "no router zebra",
- NO_STR
- "Enable a routing processn"
- "Make connection to zebra daemonn")
- {
- zclient->enable = 0;
- zclient_stop (zclient);
- return CMD_SUCCESS;
- }
- int
- rip_redistribute_set (int type)
- {
- if (zclient->redist[type])
- return CMD_SUCCESS;
- zclient->redist[type] = 1;
- if (zclient->sock > 0)
- zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient->sock, type);
- return CMD_SUCCESS;
- }
- int
- rip_redistribute_unset (int type)
- {
- if (! zclient->redist[type])
- return CMD_SUCCESS;
- zclient->redist[type] = 0;
- if (zclient->sock > 0)
- zebra_redistribute_send (ZEBRA_REDISTRIBUTE_DELETE, zclient->sock, type);
- /* Remove the routes from RIP table. */
- rip_redistribute_withdraw (type);
- return CMD_SUCCESS;
- }
- int
- rip_redistribute_check (int type)
- {
- return (zclient->redist[type]);
- }
- void
- rip_redistribute_clean ()
- {
- int i;
- for (i = 0; redist_type[i].str; i++)
- {
- if (zclient->redist[redist_type[i].type])
- {
- if (zclient->sock > 0)
- zebra_redistribute_send (ZEBRA_REDISTRIBUTE_DELETE,
- zclient->sock, redist_type[i].type);
- zclient->redist[redist_type[i].type] = 0;
- /* Remove the routes from RIP table. */
- rip_redistribute_withdraw (redist_type[i].type);
- }
- }
- }
- DEFUN (rip_redistribute_rip,
- rip_redistribute_rip_cmd,
- "redistribute rip",
- "Redistribute information from another routing protocoln"
- "Routing Information Protocol (RIP)n")
- {
- zclient->redist[ZEBRA_ROUTE_RIP] = 1;
- return CMD_SUCCESS;
- }
- DEFUN (no_rip_redistribute_rip,
- no_rip_redistribute_rip_cmd,
- "no redistribute rip",
- NO_STR
- "Redistribute information from another routing protocoln"
- "Routing Information Protocol (RIP)n")
- {
- zclient->redist[ZEBRA_ROUTE_RIP] = 0;
- return CMD_SUCCESS;
- }
- DEFUN (rip_redistribute_type,
- rip_redistribute_type_cmd,
- "redistribute (kernel|connected|static|ospf|bgp)",
- "Redistribute information from another routing protocoln"
- "Kernel routesn"
- "Connectedn"
- "Static routesn"
- "Open Shortest Path First (OSPF)n"
- "Border Gateway Protocol (BGP)n")
- {
- int i;
- for(i = 0; redist_type[i].str; i++)
- {
- if (strncmp (redist_type[i].str, argv[0],
- redist_type[i].str_min_len) == 0)
- {
- zclient_redistribute_set (zclient, redist_type[i].type);
- return CMD_SUCCESS;
- }
- }
- vty_out(vty, "Invalid type %s%s", argv[0],
- VTY_NEWLINE);
- return CMD_WARNING;
- }
- DEFUN (no_rip_redistribute_type,
- no_rip_redistribute_type_cmd,
- "no redistribute (kernel|connected|static|ospf|bgp)",
- NO_STR
- "Redistribute information from another routing protocoln"
- "Kernel routesn"
- "Connectedn"
- "Static routesn"
- "Open Shortest Path First (OSPF)n"
- "Border Gateway Protocol (BGP)n")
- {
- int i;
- for (i = 0; redist_type[i].str; i++)
- {
- if (strncmp(redist_type[i].str, argv[0],
- redist_type[i].str_min_len) == 0)
- {
- rip_metric_unset (redist_type[i].type, DONT_CARE_METRIC_RIP);
- rip_routemap_unset (redist_type[i].type,NULL);
- rip_redistribute_unset (redist_type[i].type);
- return CMD_SUCCESS;
- }
- }
- vty_out(vty, "Invalid type %s%s", argv[0],
- VTY_NEWLINE);
- return CMD_WARNING;
- }
- DEFUN (rip_redistribute_type_routemap,
- rip_redistribute_type_routemap_cmd,
- "redistribute (kernel|connected|static|ospf|bgp) route-map WORD",
- "Redistribute information from another routing protocoln"
- "Kernel routesn"
- "Connectedn"
- "Static routesn"
- "Open Shortest Path First (OSPF)n"
- "Border Gateway Protocol (BGP)n"
- "Route map referencen"
- "Pointer to route-map entriesn")
- {
- int i;
- for (i = 0; redist_type[i].str; i++) {
- if (strncmp(redist_type[i].str, argv[0],
- redist_type[i].str_min_len) == 0)
- {
- rip_routemap_set (redist_type[i].type, argv[1]);
- zclient_redistribute_set (zclient, redist_type[i].type);
- return CMD_SUCCESS;
- }
- }
- vty_out(vty, "Invalid type %s%s", argv[0],
- VTY_NEWLINE);
- return CMD_WARNING;
- }
- DEFUN (no_rip_redistribute_type_routemap,
- no_rip_redistribute_type_routemap_cmd,
- "no redistribute (kernel|connected|static|ospf|bgp) route-map WORD",
- NO_STR
- "Redistribute information from another routing protocoln"
- "Kernel routesn"
- "Connectedn"
- "Static routesn"
- "Open Shortest Path First (OSPF)n"
- "Border Gateway Protocol (BGP)n"
- "Route map referencen"
- "Pointer to route-map entriesn")
- {
- int i;
- for (i = 0; redist_type[i].str; i++)
- {
- if (strncmp(redist_type[i].str, argv[0],
- redist_type[i].str_min_len) == 0)
- {
- if (rip_routemap_unset (redist_type[i].type,argv[1]))
- return CMD_WARNING;
- rip_redistribute_unset (redist_type[i].type);
- return CMD_SUCCESS;
- }
- }
- vty_out(vty, "Invalid type %s%s", argv[0],
- VTY_NEWLINE);
- return CMD_WARNING;
- }
- DEFUN (rip_redistribute_type_metric,
- rip_redistribute_type_metric_cmd,
- "redistribute (kernel|connected|static|ospf|bgp) metric <0-16>",
- "Redistribute information from another routing protocoln"
- "Kernel routesn"
- "Connectedn"
- "Static routesn"
- "Open Shortest Path First (OSPF)n"
- "Border Gateway Protocol (BGP)n"
- "Metricn"
- "Metric valuen")
- {
- int i;
- int metric;
- metric = atoi (argv[1]);
- for (i = 0; redist_type[i].str; i++) {
- if (strncmp(redist_type[i].str, argv[0],
- redist_type[i].str_min_len) == 0)
- {
- rip_redistribute_metric_set (redist_type[i].type, metric);
- zclient_redistribute_set (zclient, redist_type[i].type);
- return CMD_SUCCESS;
- }
- }
- vty_out(vty, "Invalid type %s%s", argv[0],
- VTY_NEWLINE);
- return CMD_WARNING;
- }
- DEFUN (no_rip_redistribute_type_metric,
- no_rip_redistribute_type_metric_cmd,
- "no redistribute (kernel|connected|static|ospf|bgp) metric <0-16>",
- NO_STR
- "Redistribute information from another routing protocoln"
- "Kernel routesn"
- "Connectedn"
- "Static routesn"
- "Open Shortest Path First (OSPF)n"
- "Border Gateway Protocol (BGP)n"
- "Metricn"
- "Metric valuen")
- {
- int i;
- for (i = 0; redist_type[i].str; i++)
- {
- if (strncmp(redist_type[i].str, argv[0],
- redist_type[i].str_min_len) == 0)
- {
- if (rip_metric_unset (redist_type[i].type, atoi(argv[1])))
- return CMD_WARNING;
- rip_redistribute_unset (redist_type[i].type);
- return CMD_SUCCESS;
- }
- }
- vty_out(vty, "Invalid type %s%s", argv[0],
- VTY_NEWLINE);
- return CMD_WARNING;
- }
- DEFUN (no_rip_redistribute_type_metric_routemap,
- no_rip_redistribute_type_metric_routemap_cmd,
- "no redistribute (kernel|connected|static|ospf|bgp) metric <0-16> route-map WORD",
- NO_STR
- "Redistribute information from another routing protocoln"
- "Kernel routesn"
- "Connectedn"
- "Static routesn"
- "Open Shortest Path First (OSPF)n"
- "Border Gateway Protocol (BGP)n"
- "Metricn"
- "Metric valuen"
- "Route map referencen"
- "Pointer to route-map entriesn")
- {
- int i;
- for (i = 0; redist_type[i].str; i++)
- {
- if (strncmp(redist_type[i].str, argv[0],
- redist_type[i].str_min_len) == 0)
- {
- if (rip_metric_unset (redist_type[i].type, atoi(argv[1])))
- return CMD_WARNING;
- if (rip_routemap_unset (redist_type[i].type, argv[2]))
- {
- rip_redistribute_metric_set(redist_type[i].type, atoi(argv[1]));
- return CMD_WARNING;
- }
- rip_redistribute_unset (redist_type[i].type);
- return CMD_SUCCESS;
- }
- }
- vty_out(vty, "Invalid type %s%s", argv[0],
- VTY_NEWLINE);
- return CMD_WARNING;
- }
- /* Default information originate. */
- DEFUN (rip_default_information_originate,
- rip_default_information_originate_cmd,
- "default-information originate",
- "Control distribution of default routen"
- "Distribute a default routen")
- {
- struct prefix_ipv4 p;
- if (! rip->default_information)
- {
- memset (&p, 0, sizeof (struct prefix_ipv4));
- p.family = AF_INET;
- rip->default_information = 1;
-
- rip_redistribute_add (ZEBRA_ROUTE_RIP, RIP_ROUTE_STATIC, &p, 0, NULL);
- }
- return CMD_SUCCESS;
- }
- DEFUN (no_rip_default_information_originate,
- no_rip_default_information_originate_cmd,
- "no default-information originate",
- NO_STR
- "Control distribution of default routen"
- "Distribute a default routen")
- {
- struct prefix_ipv4 p;
- if (rip->default_information)
- {
- memset (&p, 0, sizeof (struct prefix_ipv4));
- p.family = AF_INET;
- rip->default_information = 0;
-
- rip_redistribute_delete (ZEBRA_ROUTE_RIP, RIP_ROUTE_STATIC, &p, 0);
- }
- return CMD_SUCCESS;
- }
- /* RIP configuration write function. */
- int
- config_write_zebra (struct vty *vty)
- {
- if (! zclient->enable)
- {
- vty_out (vty, "no router zebra%s", VTY_NEWLINE);
- return 1;
- }
- else if (! zclient->redist[ZEBRA_ROUTE_RIP])
- {
- vty_out (vty, "router zebra%s", VTY_NEWLINE);
- vty_out (vty, " no redistribute rip%s", VTY_NEWLINE);
- return 1;
- }
- return 0;
- }
- int
- config_write_rip_redistribute (struct vty *vty, int config_mode)
- {
- int i;
- char *str[] = { "system", "kernel", "connected", "static", "rip",
- "ripng", "ospf", "ospf6", "bgp"};
- for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
- if (i != zclient->redist_default && zclient->redist[i])
- {
- if (config_mode)
- {
- if (rip->route_map[i].metric_config)
- {
- if (rip->route_map[i].name)
- vty_out (vty, " redistribute %s metric %d route-map %s%s",
- str[i], rip->route_map[i].metric,
- rip->route_map[i].name,
- VTY_NEWLINE);
- else
- vty_out (vty, " redistribute %s metric %d%s",
- str[i], rip->route_map[i].metric,
- VTY_NEWLINE);
- }
- else
- {
- if (rip->route_map[i].name)
- vty_out (vty, " redistribute %s route-map %s%s",
- str[i], rip->route_map[i].name,
- VTY_NEWLINE);
- else
- vty_out (vty, " redistribute %s%s", str[i],
- VTY_NEWLINE);
- }
- }
- else
- vty_out (vty, " %s", str[i]);
- }
- return 0;
- }
- /* Zebra node structure. */
- struct cmd_node zebra_node =
- {
- ZEBRA_NODE,
- "%s(config-router)# ",
- };
- void
- rip_zclient_init ()
- {
- /* Set default value to the zebra client structure. */
- zclient = zclient_new ();
- zclient_init (zclient, ZEBRA_ROUTE_RIP);
- zclient->interface_add = rip_interface_add;
- zclient->interface_delete = rip_interface_delete;
- zclient->interface_address_add = rip_interface_address_add;
- zclient->interface_address_delete = rip_interface_address_delete;
- zclient->ipv4_route_add = rip_zebra_read_ipv4;
- zclient->ipv4_route_delete = rip_zebra_read_ipv4;
- zclient->interface_up = rip_interface_up;
- zclient->interface_down = rip_interface_down;
-
- /* Install zebra node. */
- install_node (&zebra_node, config_write_zebra);
- /* Install command elements to zebra node. */
- install_element (CONFIG_NODE, &router_zebra_cmd);
- install_element (CONFIG_NODE, &no_router_zebra_cmd);
- install_default (ZEBRA_NODE);
- install_element (ZEBRA_NODE, &rip_redistribute_rip_cmd);
- install_element (ZEBRA_NODE, &no_rip_redistribute_rip_cmd);
- /* Install command elements to rip node. */
- install_element (RIP_NODE, &rip_redistribute_type_cmd);
- install_element (RIP_NODE, &rip_redistribute_type_routemap_cmd);
- install_element (RIP_NODE, &rip_redistribute_type_metric_cmd);
- install_element (RIP_NODE, &no_rip_redistribute_type_cmd);
- install_element (RIP_NODE, &no_rip_redistribute_type_routemap_cmd);
- install_element (RIP_NODE, &no_rip_redistribute_type_metric_cmd);
- install_element (RIP_NODE, &no_rip_redistribute_type_metric_routemap_cmd);
- install_element (RIP_NODE, &rip_default_information_originate_cmd);
- install_element (RIP_NODE, &no_rip_default_information_originate_cmd);
- }