gotwebd/config.c

   1 /*
   2  * Copyright (c) 2020-2021 Tracey Emery <tracey@traceyemery.net>
   3  * Copyright (c) 2015 Reyk Floeter <reyk@openbsd.org>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include "got_compat.h"
  19
  20 #include <sys/types.h>
  21 #include <sys/queue.h>
  22 #include <sys/time.h>
  23 #include <sys/uio.h>
  24 #include <sys/socket.h>
  25
  26 #include <net/if.h>
  27 #include <netinet/in.h>
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <termios.h>
  32 #include <unistd.h>
  33 #include <limits.h>
  34 #include <string.h>
  35 #include <event.h>
  36 #include <fcntl.h>
  37 #include <errno.h>
  38
  39 #include "got_opentemp.h"
  40 #include "got_reference.h"
  41
  42 #include "gotwebd.h"
  43 #include "log.h"
  44
  45 int
  46 config_init(struct gotwebd *env)
  47 {
  48         int i;
  49
  50         strlcpy(env->httpd_chroot, D_HTTPD_CHROOT, sizeof(env->httpd_chroot));
  51
  52         env->prefork_gotwebd = GOTWEBD_NUMPROC;
  53         env->server_cnt = 0;
  54         TAILQ_INIT(&env->servers);
  55         TAILQ_INIT(&env->sockets);
  56         TAILQ_INIT(&env->addresses);
  57
  58         for (i = 0; i < PRIV_FDS__MAX; i++)
  59                 env->priv_fd[i] = -1;
  60
  61         for (i = 0; i < GOTWEB_PACK_NUM_TEMPFILES; i++)
  62                 env->pack_fds[i] = -1;
  63
  64         return 0;
  65 }
  66
  67 int
  68 config_getcfg(struct gotwebd *env, struct imsg *imsg)
  69 {
  70         /* nothing to do but tell gotwebd configuration is done */
  71         if (sockets_compose_main(env, IMSG_CFG_DONE, NULL, 0) == -1)
  72                 fatal("sockets_compose_main IMSG_CFG_DONE");
  73         return 0;
  74 }
  75
  76 int
  77 config_setserver(struct gotwebd *env, struct server *srv)
  78 {
  79         if (main_compose_sockets(env, IMSG_CFG_SRV, -1, srv, sizeof(*srv))
  80             == -1)
  81                 fatal("main_compose_sockets IMSG_CFG_SRV");
  82         return 0;
  83 }
  84
  85 int
  86 config_getserver(struct gotwebd *env, struct imsg *imsg)
  87 {
  88         struct server *srv;
  89         uint8_t *p = imsg->data;
  90
  91         srv = calloc(1, sizeof(*srv));
  92         if (srv == NULL)
  93                 fatalx("%s: calloc", __func__);
  94
  95         if (IMSG_DATA_SIZE(imsg) != sizeof(*srv))
  96                 fatalx("%s: wrong size", __func__);
  97
  98         memcpy(srv, p, sizeof(*srv));
  99
 100         /* log server info */
 101         log_debug("%s: server=%s", __func__, srv->name);
 102
 103         TAILQ_INSERT_TAIL(&env->servers, srv, entry);
 104
 105         return 0;
 106 }
 107
 108 int
 109 config_setsock(struct gotwebd *env, struct socket *sock)
 110 {
 111         /* open listening sockets */
 112         if (sockets_privinit(env, sock) == -1)
 113                 return -1;
 114
 115         if (main_compose_sockets(env, IMSG_CFG_SOCK, sock->fd,
 116             &sock->conf, sizeof(sock->conf)) == -1)
 117                 fatal("main_compose_sockets IMSG_CFG_SOCK");
 118
 119         sock->fd = -1;
 120         return 0;
 121 }
 122
 123 int
 124 config_getsock(struct gotwebd *env, struct imsg *imsg)
 125 {
 126         struct socket *sock = NULL;
 127         struct socket_conf sock_conf;
 128         uint8_t *p = imsg->data;
 129
 130         if (IMSG_DATA_SIZE(imsg) != sizeof(sock_conf))
 131                 fatalx("%s: wrong size", __func__);
 132
 133         memcpy(&sock_conf, p, sizeof(sock_conf));
 134
 135         if (IMSG_DATA_SIZE(imsg) != sizeof(sock_conf)) {
 136                 log_warnx("%s: imsg size error", __func__);
 137                 return 1;
 138         }
 139
 140         /* create a new socket */
 141         if ((sock = calloc(1, sizeof(*sock))) == NULL) {
 142                 return 1;
 143         }
 144
 145         memcpy(&sock->conf, &sock_conf, sizeof(sock->conf));
 146         sock->fd = imsg_get_fd(imsg);
 147
 148         TAILQ_INSERT_TAIL(&env->sockets, sock, entry);
 149
 150         /* log new socket info */
 151         log_debug("%s: id=%d af_type=%s socket_path=%s",
 152             __func__, sock->conf.id,
 153             sock->conf.af_type == AF_UNIX ? "unix" :
 154             (sock->conf.af_type == AF_INET ? "inet" :
 155             (sock->conf.af_type == AF_INET6 ? "inet6" : "unknown")),
 156             *sock->conf.unix_socket_name != '\0' ?
 157             sock->conf.unix_socket_name : "none");
 158
 159         return 0;
 160 }
 161
 162 int
 163 config_setfd(struct gotwebd *env)
 164 {
 165         int i, j, fd;
 166
 167         log_info("%s: Allocating %d file descriptors",
 168             __func__, PRIV_FDS__MAX + GOTWEB_PACK_NUM_TEMPFILES);
 169
 170         for (i = 0; i < PRIV_FDS__MAX + GOTWEB_PACK_NUM_TEMPFILES; i++) {
 171                 for (j = 0; j < env->nserver; ++j) {
 172                         fd = got_opentempfd();
 173                         if (fd == -1)
 174                                 fatal("got_opentemp");
 175                         if (imsg_compose_event(&env->iev_server[j],
 176                             IMSG_CFG_FD, 0, -1, fd, NULL, 0) == -1)
 177                                 fatal("imsg_compose_event IMSG_CFG_FD");
 178
 179                         if (imsgbuf_flush(&env->iev_server[j].ibuf) == -1)
 180                                 fatal("imsgbuf_flush");
 181                         imsg_event_add(&env->iev_server[j]);
 182                 }
 183         }
 184
 185         return 0;
 186 }
 187
 188 int
 189 config_getfd(struct gotwebd *env, struct imsg *imsg)
 190 {
 191         int i;
 192
 193         if (imsg_get_len(imsg) != 0)
 194                 fatalx("%s: wrong size", __func__);
 195
 196         for (i = 0; i < nitems(env->priv_fd); ++i) {
 197                 if (env->priv_fd[i] == -1) {
 198                         env->priv_fd[i] = imsg_get_fd(imsg);
 199                         log_debug("%s: assigning priv_fd %d",
 200                             __func__, env->priv_fd[i]);
 201                         return 0;
 202                 }
 203         }
 204
 205         for (i = 0; i < nitems(env->pack_fds); ++i) {
 206                 if (env->pack_fds[i] == -1) {
 207                         env->pack_fds[i] = imsg_get_fd(imsg);
 208                         log_debug("%s: assigning pack_fd %d",
 209                             __func__, env->pack_fds[i]);
 210                         return 0;
 211                 }
 212         }
 213
 214         return 1;
 215 }