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
  44 int
  45 config_init(struct gotwebd *env)
  46 {
  47         strlcpy(env->httpd_chroot, D_HTTPD_CHROOT, sizeof(env->httpd_chroot));
  48
  49         env->prefork_gotwebd = GOTWEBD_NUMPROC;
  50         env->server_cnt = 0;
  51         TAILQ_INIT(&env->servers);
  52         TAILQ_INIT(&env->sockets);
  53
  54         return 0;
  55 }
  56
  57 int
  58 config_getcfg(struct gotwebd *env, struct imsg *imsg)
  59 {
  60         /* nothing to do but tell gotwebd configuration is done */
  61         if (sockets_compose_main(env, IMSG_CFG_DONE, NULL, 0) == -1)
  62                 fatal("sockets_compose_main IMSG_CFG_DONE");
  63         return 0;
  64 }
  65
  66 int
  67 config_setserver(struct gotwebd *env, struct server *srv)
  68 {
  69         if (main_compose_sockets(env, IMSG_CFG_SRV, -1, srv, sizeof(*srv))
  70             == -1)
  71                 fatal("main_compose_sockets IMSG_CFG_SRV");
  72         return 0;
  73 }
  74
  75 int
  76 config_getserver(struct gotwebd *env, struct imsg *imsg)
  77 {
  78         struct server *srv;
  79         uint8_t *p = imsg->data;
  80
  81         srv = calloc(1, sizeof(*srv));
  82         if (srv == NULL)
  83                 fatalx("%s: calloc", __func__);
  84
  85         if (IMSG_DATA_SIZE(imsg) != sizeof(*srv))
  86                 fatalx("%s: wrong size", __func__);
  87
  88         memcpy(srv, p, sizeof(*srv));
  89
  90         /* log server info */
  91         log_debug("%s: server=%s fcgi_socket=%s unix_socket=%s", __func__,
  92             srv->name, srv->fcgi_socket ? "yes" : "no", srv->unix_socket ?
  93             "yes" : "no");
  94
  95         TAILQ_INSERT_TAIL(&env->servers, srv, entry);
  96
  97         return 0;
  98 }
  99
 100 int
 101 config_setsock(struct gotwebd *env, struct socket *sock)
 102 {
 103         /* open listening sockets */
 104         if (sockets_privinit(env, sock) == -1)
 105                 return -1;
 106
 107         if (main_compose_sockets(env, IMSG_CFG_SOCK, sock->fd,
 108             &sock->conf, sizeof(sock->conf)) == -1)
 109                 fatal("main_compose_sockets IMSG_CFG_SOCK");
 110
 111         sock->fd = -1;
 112         return 0;
 113 }
 114
 115 int
 116 config_getsock(struct gotwebd *env, struct imsg *imsg)
 117 {
 118         struct socket *sock = NULL;
 119         struct socket_conf sock_conf;
 120         uint8_t *p = imsg->data;
 121         int i;
 122
 123         if (IMSG_DATA_SIZE(imsg) != sizeof(sock_conf))
 124                 fatalx("%s: wrong size", __func__);
 125
 126         memcpy(&sock_conf, p, sizeof(sock_conf));
 127
 128         if (IMSG_DATA_SIZE(imsg) != sizeof(sock_conf)) {
 129                 log_debug("%s: imsg size error", __func__);
 130                 return 1;
 131         }
 132
 133         /* create a new socket */
 134         if ((sock = calloc(1, sizeof(*sock))) == NULL) {
 135                 return 1;
 136         }
 137
 138         memcpy(&sock->conf, &sock_conf, sizeof(sock->conf));
 139         sock->fd = imsg_get_fd(imsg);
 140
 141         TAILQ_INSERT_TAIL(&env->sockets, sock, entry);
 142
 143         for (i = 0; i < PRIV_FDS__MAX; i++)
 144                 sock->priv_fd[i] = -1;
 145
 146         for (i = 0; i < GOTWEB_PACK_NUM_TEMPFILES; i++)
 147                 sock->pack_fds[i] = -1;
 148
 149         /* log new socket info */
 150         log_debug("%s: name=%s id=%d server=%s af_type=%s socket_path=%s",
 151             __func__, sock->conf.name, sock->conf.id, sock->conf.srv_name,
 152             sock->conf.af_type == AF_UNIX ? "unix" :
 153             (sock->conf.af_type == AF_INET ? "inet" :
 154             (sock->conf.af_type == AF_INET6 ? "inet6" : "unknown")),
 155             *sock->conf.unix_socket_name != '\0' ?
 156             sock->conf.unix_socket_name : "none");
 157
 158         return 0;
 159 }
 160
 161 int
 162 config_setfd(struct gotwebd *env, struct socket *sock)
 163 {
 164         int i, j, ret, fd;
 165
 166         log_debug("%s: Allocating %d file descriptors",
 167             __func__, PRIV_FDS__MAX + GOTWEB_PACK_NUM_TEMPFILES);
 168
 169         for (i = 0; i < PRIV_FDS__MAX + GOTWEB_PACK_NUM_TEMPFILES; i++) {
 170                 for (j = 0; j < env->nserver; ++j) {
 171                         fd = got_opentempfd();
 172                         if (fd == -1)
 173                                 fatal("got_opentemp");
 174                         if (imsg_compose_event(&env->iev_server[j],
 175                             IMSG_CFG_FD, 0, -1, fd, &sock->conf.id,
 176                             sizeof(sock->conf.id)) == -1)
 177                                 fatal("imsg_compose_event IMSG_CFG_FD");
 178
 179                         do {
 180                                 ret = imsg_flush(&env->iev_server[j].ibuf);
 181                         } while (ret == -1 && errno == EAGAIN);
 182                         if (ret == -1)
 183                                 fatal("imsg_flush");
 184                         imsg_event_add(&env->iev_server[j]);
 185                 }
 186         }
 187
 188         return 0;
 189 }
 190
 191 int
 192 config_getfd(struct gotwebd *env, struct imsg *imsg)
 193 {
 194         struct socket *sock;
 195         uint8_t *p = imsg->data;
 196         int sock_id, match = 0, i, j;
 197
 198         if (IMSG_DATA_SIZE(imsg) != sizeof(sock_id))
 199                 fatalx("%s: wrong size", __func__);
 200
 201         memcpy(&sock_id, p, sizeof(sock_id));
 202
 203         TAILQ_FOREACH(sock, &env->sockets, entry) {
 204                 const int nfds = (GOTWEB_PACK_NUM_TEMPFILES + PRIV_FDS__MAX);
 205                 for (i = 0; i < nfds; i++) {
 206                         if (i < PRIV_FDS__MAX && sock->priv_fd[i] == -1) {
 207                                 sock->priv_fd[i] = imsg_get_fd(imsg);
 208                                 log_debug("%s: assigning socket %d priv_fd %d",
 209                                     __func__, sock_id, sock->priv_fd[i]);
 210                                 match = 1;
 211                                 break;
 212                         }
 213
 214                         j = i - PRIV_FDS__MAX;
 215                         if (sock->pack_fds[j] == -1) {
 216                                 sock->pack_fds[j] = imsg_get_fd(imsg);
 217                                 log_debug("%s: assigning socket %d pack_fd %d",
 218                                     __func__, sock_id, sock->pack_fds[j]);
 219                                 match = 1;
 220                                 break;
 221                         }
 222                 }
 223         }
 224
 225         if (match)
 226                 return 0;
 227         else
 228                 return 1;
 229 }