1/* Zebra's client header. 2 * Copyright (C) 1999 Kunihiro Ishiguro 3 * 4 * This file is part of GNU Zebra. 5 * 6 * GNU Zebra is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2, or (at your option) 9 * any later version. 10 * 11 * GNU Zebra is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with GNU Zebra; see the file COPYING. If not, write to the 18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 19 * Boston, MA 02111-1307, USA. 20 */ 21 22#ifndef _ZEBRA_ZCLIENT_H 23#define _ZEBRA_ZCLIENT_H 24 25/* For struct zapi_ipv{4,6}. */ 26#include "prefix.h" 27 28/* For struct interface and struct connected. */ 29#include "if.h" 30 31/* For input/output buffer to zebra. */ 32#define ZEBRA_MAX_PACKET_SIZ 4096 33 34/* Zebra header size. */ 35#define ZEBRA_HEADER_SIZE 6 36 37/* Structure for the zebra client. */ 38struct zclient 39{ 40 /* Socket to zebra daemon. */ 41 int sock; 42 43 /* Flag of communication to zebra is enabled or not. Default is on. 44 This flag is disabled by `no router zebra' statement. */ 45 int enable; 46 47 /* Connection failure count. */ 48 int fail; 49 50 /* Input buffer for zebra message. */ 51 struct stream *ibuf; 52 53 /* Output buffer for zebra message. */ 54 struct stream *obuf; 55 56 /* Buffer of data waiting to be written to zebra. */ 57 struct buffer *wb; 58 59 /* Read and connect thread. */ 60 struct thread *t_read; 61 struct thread *t_connect; 62 63 /* Thread to write buffered data to zebra. */ 64 struct thread *t_write; 65 66 /* Redistribute information. */ 67 u_char redist_default; 68 u_char redist[ZEBRA_ROUTE_MAX]; 69 70 /* Redistribute defauilt. */ 71 u_char default_information; 72 73 /* Pointer to the callback functions. */ 74 int (*router_id_update) (int, struct zclient *, uint16_t); 75 int (*interface_add) (int, struct zclient *, uint16_t); 76 int (*interface_delete) (int, struct zclient *, uint16_t); 77 int (*interface_up) (int, struct zclient *, uint16_t); 78 int (*interface_down) (int, struct zclient *, uint16_t); 79 int (*interface_address_add) (int, struct zclient *, uint16_t); 80 int (*interface_address_delete) (int, struct zclient *, uint16_t); 81 int (*ipv4_route_add) (int, struct zclient *, uint16_t); 82 int (*ipv4_route_delete) (int, struct zclient *, uint16_t); 83 int (*ipv6_route_add) (int, struct zclient *, uint16_t); 84 int (*ipv6_route_delete) (int, struct zclient *, uint16_t); 85}; 86 87/* Zebra API message flag. */ 88#define ZAPI_MESSAGE_NEXTHOP 0x01 89#define ZAPI_MESSAGE_IFINDEX 0x02 90#define ZAPI_MESSAGE_DISTANCE 0x04 91#define ZAPI_MESSAGE_METRIC 0x08 92 93/* Zserv protocol message header */ 94struct zserv_header 95{ 96 uint16_t length; 97 uint8_t marker; /* corresponds to command field in old zserv 98 * always set to 255 in new zserv. 99 */ 100 uint8_t version; 101#define ZSERV_VERSION 2 102 uint16_t command; 103}; 104 105/* Zebra IPv4 route message API. */ 106struct zapi_ipv4 107{ 108 u_char type; 109 110 u_char flags; 111 112 u_char message; 113 114 safi_t safi; 115 116 u_char nexthop_num; 117 struct in_addr **nexthop; 118 119 u_char ifindex_num; 120 unsigned int *ifindex; 121 122 u_char distance; 123 124 u_int32_t metric; 125}; 126 127/* Prototypes of zebra client service functions. */ 128extern struct zclient *zclient_new (void); 129extern void zclient_init (struct zclient *, int); 130extern int zclient_start (struct zclient *); 131extern void zclient_stop (struct zclient *); 132extern void zclient_reset (struct zclient *); 133extern void zclient_free (struct zclient *); 134 135extern int zclient_socket_connect (struct zclient *); 136extern void zclient_serv_path_set (char *path); 137extern const char *const zclient_serv_path_get (void); 138 139/* Send redistribute command to zebra daemon. Do not update zclient state. */ 140extern int zebra_redistribute_send (int command, struct zclient *, int type); 141 142/* If state has changed, update state and call zebra_redistribute_send. */ 143extern void zclient_redistribute (int command, struct zclient *, int type); 144 145/* If state has changed, update state and send the command to zebra. */ 146extern void zclient_redistribute_default (int command, struct zclient *); 147 148/* Send the message in zclient->obuf to the zebra daemon (or enqueue it). 149 Returns 0 for success or -1 on an I/O error. */ 150extern int zclient_send_message(struct zclient *); 151 152/* create header for command, length to be filled in by user later */ 153extern void zclient_create_header (struct stream *, uint16_t); 154 155extern struct interface *zebra_interface_add_read (struct stream *); 156extern struct interface *zebra_interface_state_read (struct stream *s); 157extern struct connected *zebra_interface_address_read (int, struct stream *); 158extern void zebra_interface_if_set_value (struct stream *, struct interface *); 159extern void zebra_router_id_update_read (struct stream *s, struct prefix *rid); 160extern int zapi_ipv4_route (u_char, struct zclient *, struct prefix_ipv4 *, 161 struct zapi_ipv4 *); 162 163#ifdef HAVE_IPV6 164/* IPv6 prefix add and delete function prototype. */ 165 166struct zapi_ipv6 167{ 168 u_char type; 169 170 u_char flags; 171 172 u_char message; 173 174 safi_t safi; 175 176 u_char nexthop_num; 177 struct in6_addr **nexthop; 178 179 u_char ifindex_num; 180 unsigned int *ifindex; 181 182 u_char distance; 183 184 u_int32_t metric; 185}; 186 187extern int zapi_ipv6_route (u_char cmd, struct zclient *zclient, 188 struct prefix_ipv6 *p, struct zapi_ipv6 *api); 189#endif /* HAVE_IPV6 */ 190 191#endif /* _ZEBRA_ZCLIENT_H */ 192