zebra/zserv.h

   1 /*
   2  * Zebra API server.
   3  * Portions:
   4  *   Copyright (C) 1997-1999  Kunihiro Ishiguro
   5  *   Copyright (C) 2015-2018  Cumulus Networks, Inc.
   6  *   et al.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the Free
  10  * Software Foundation; either version 2 of the License, or (at your option)
  11  * any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but WITHOUT
  14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  16  * more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; see the file COPYING; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #ifndef _ZEBRA_ZSERV_H
  24 #define _ZEBRA_ZSERV_H
  25
  26 /* clang-format off */
  27 #include <stdint.h>           /* for uint32_t, uint8_t */
  28 #include <time.h>             /* for time_t */
  29
  30 #include "lib/route_types.h"  /* for ZEBRA_ROUTE_MAX */
  31 #include "lib/zebra.h"        /* for AFI_MAX */
  32 #include "lib/vrf.h"          /* for vrf_bitmap_t */
  33 #include "lib/zclient.h"      /* for redist_proto */
  34 #include "lib/stream.h"       /* for stream, stream_fifo */
  35 #include "lib/thread.h"       /* for thread, thread_master */
  36 #include "lib/linklist.h"     /* for list */
  37 #include "lib/workqueue.h"    /* for work_queue */
  38 #include "lib/hook.h"         /* for DECLARE_HOOK, DECLARE_KOOH */
  39
  40 #include "zebra/zebra_vrf.h"  /* for zebra_vrf */
  41 /* clang-format on */
  42
  43 #ifdef __cplusplus
  44 extern "C" {
  45 #endif
  46
  47 /* Default port information. */
  48 #define ZEBRA_VTY_PORT                2601
  49
  50 /* Default configuration filename. */
  51 #define DEFAULT_CONFIG_FILE "zebra.conf"
  52
  53 #define ZEBRA_RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
  54
  55 /* Client structure. */
  56 struct zserv {
  57         /* Client pthread */
  58         struct frr_pthread *pthread;
  59
  60         /* Client file descriptor. */
  61         int sock;
  62
  63         /* Input/output buffer to the client. */
  64         pthread_mutex_t ibuf_mtx;
  65         struct stream_fifo *ibuf_fifo;
  66         pthread_mutex_t obuf_mtx;
  67         struct stream_fifo *obuf_fifo;
  68
  69         /* Private I/O buffers */
  70         struct stream *ibuf_work;
  71         struct stream *obuf_work;
  72
  73         /* Buffer of data waiting to be written to client. */
  74         struct buffer *wb;
  75
  76         /* Threads for read/write. */
  77         struct thread *t_read;
  78         struct thread *t_write;
  79
  80         /* Event for message processing, for the main pthread */
  81         struct thread *t_process;
  82
  83         /* Threads for the main pthread */
  84         struct thread *t_cleanup;
  85
  86         /* default routing table this client munges */
  87         int rtm_table;
  88
  89         /* This client's redistribute flag. */
  90         struct redist_proto mi_redist[AFI_MAX][ZEBRA_ROUTE_MAX];
  91         vrf_bitmap_t redist[AFI_MAX][ZEBRA_ROUTE_MAX];
  92
  93         /* Redistribute default route flag. */
  94         vrf_bitmap_t redist_default[AFI_MAX];
  95
  96         /* Router-id information. */
  97         vrf_bitmap_t ridinfo;
  98
  99         bool notify_owner;
 100
 101         /* client's protocol */
 102         uint8_t proto;
 103         uint16_t instance;
 104         uint8_t is_synchronous;
 105
 106         /* Statistics */
 107         uint32_t redist_v4_add_cnt;
 108         uint32_t redist_v4_del_cnt;
 109         uint32_t redist_v6_add_cnt;
 110         uint32_t redist_v6_del_cnt;
 111         uint32_t v4_route_add_cnt;
 112         uint32_t v4_route_upd8_cnt;
 113         uint32_t v4_route_del_cnt;
 114         uint32_t v6_route_add_cnt;
 115         uint32_t v6_route_del_cnt;
 116         uint32_t v6_route_upd8_cnt;
 117         uint32_t connected_rt_add_cnt;
 118         uint32_t connected_rt_del_cnt;
 119         uint32_t ifup_cnt;
 120         uint32_t ifdown_cnt;
 121         uint32_t ifadd_cnt;
 122         uint32_t ifdel_cnt;
 123         uint32_t if_bfd_cnt;
 124         uint32_t bfd_peer_add_cnt;
 125         uint32_t bfd_peer_upd8_cnt;
 126         uint32_t bfd_peer_del_cnt;
 127         uint32_t bfd_peer_replay_cnt;
 128         uint32_t vrfadd_cnt;
 129         uint32_t vrfdel_cnt;
 130         uint32_t if_vrfchg_cnt;
 131         uint32_t bfd_client_reg_cnt;
 132         uint32_t vniadd_cnt;
 133         uint32_t vnidel_cnt;
 134         uint32_t l3vniadd_cnt;
 135         uint32_t l3vnidel_cnt;
 136         uint32_t macipadd_cnt;
 137         uint32_t macipdel_cnt;
 138         uint32_t prefixadd_cnt;
 139         uint32_t prefixdel_cnt;
 140         uint32_t v4_nh_watch_add_cnt;
 141         uint32_t v4_nh_watch_rem_cnt;
 142         uint32_t v6_nh_watch_add_cnt;
 143         uint32_t v6_nh_watch_rem_cnt;
 144
 145         time_t nh_reg_time;
 146         time_t nh_dereg_time;
 147         time_t nh_last_upd_time;
 148
 149         /*
 150          * Session information.
 151          *
 152          * These are not synchronous with respect to each other. For instance,
 153          * last_read_cmd may contain a value that has been read in the future
 154          * relative to last_read_time.
 155          */
 156
 157         /* monotime of client creation */
 158         _Atomic uint32_t connect_time;
 159         /* monotime of last message received */
 160         _Atomic uint32_t last_read_time;
 161         /* monotime of last message sent */
 162         _Atomic uint32_t last_write_time;
 163         /* command code of last message read */
 164         _Atomic uint32_t last_read_cmd;
 165         /* command code of last message written */
 166         _Atomic uint32_t last_write_cmd;
 167 };
 168
 169 #define ZAPI_HANDLER_ARGS                                                      \
 170         struct zserv *client, struct zmsghdr *hdr, struct stream *msg,         \
 171                 struct zebra_vrf *zvrf
 172
 173 /* Hooks for client connect / disconnect */
 174 DECLARE_HOOK(zserv_client_connect, (struct zserv *client), (client));
 175 DECLARE_KOOH(zserv_client_close, (struct zserv *client), (client));
 176
 177 extern unsigned int multipath_num;
 178
 179 /*
 180  * Initialize Zebra API server.
 181  *
 182  * Installs CLI commands and creates the client list.
 183  */
 184 extern void zserv_init(void);
 185
 186 /*
 187  * Stop the Zebra API server.
 188  *
 189  * closes the socket
 190  */
 191 extern void zserv_close(void);
 192
 193 /*
 194  * Start Zebra API server.
 195  *
 196  * Allocates resources, creates the server socket and begins listening on the
 197  * socket.
 198  *
 199  * path
 200  *    where to place the Unix domain socket
 201  */
 202 extern void zserv_start(char *path);
 203
 204 /*
 205  * Send a message to a connected Zebra API client.
 206  *
 207  * client
 208  *    the client to send to
 209  *
 210  * msg
 211  *    the message to send
 212  */
 213 extern int zserv_send_message(struct zserv *client, struct stream *msg);
 214
 215 /*
 216  * Retrieve a client by its protocol and instance number.
 217  *
 218  * proto
 219  *    protocol number
 220  *
 221  * instance
 222  *    instance number
 223  *
 224  * Returns:
 225  *    The Zebra API client.
 226  */
 227 extern struct zserv *zserv_find_client(uint8_t proto, unsigned short instance);
 228
 229
 230 /*
 231  * Close a client.
 232  *
 233  * Kills a client's thread, removes the client from the client list and cleans
 234  * up its resources.
 235  *
 236  * client
 237  *    the client to close
 238  */
 239 extern void zserv_close_client(struct zserv *client);
 240
 241 #if defined(HANDLE_ZAPI_FUZZING)
 242 extern void zserv_read_file(char *input);
 243 #endif
 244
 245 /* TODO */
 246 int zebra_finalize(struct thread *event);
 247
 248 #ifdef __cplusplus
 249 }
 250 #endif
 251
 252 #endif /* _ZEBRA_ZEBRA_H */