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 <sys/types.h>
19 #include <sys/queue.h>
20 #include <sys/time.h>
21 #include <sys/uio.h>
22 #include <sys/socket.h>
23 
24 #include <net/if.h>
25 #include <netinet/in.h>
26 
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <termios.h>
30 #include <unistd.h>
31 #include <limits.h>
32 #include <string.h>
33 #include <event.h>
34 #include <fcntl.h>
35 #include <errno.h>
36 
37 #include "got_opentemp.h"
38 #include "got_reference.h"
39 
40 #include "gotwebd.h"
41 
42 int
43 config_init(struct gotwebd *env)
44 {
45 	strlcpy(env->httpd_chroot, D_HTTPD_CHROOT, sizeof(env->httpd_chroot));
46 
47 	env->prefork_gotwebd = GOTWEBD_NUMPROC;
48 	env->server_cnt = 0;
49 	TAILQ_INIT(&env->servers);
50 	TAILQ_INIT(&env->sockets);
51 
52 	return 0;
53 }
54 
55 int
56 config_getcfg(struct gotwebd *env, struct imsg *imsg)
57 {
58 	/* nothing to do but tell gotwebd configuration is done */
59 	if (sockets_compose_main(env, IMSG_CFG_DONE, NULL, 0) == -1)
60 		fatal("sockets_compose_main IMSG_CFG_DONE");
61 	return 0;
62 }
63 
64 int
65 config_setserver(struct gotwebd *env, struct server *srv)
66 {
67 	if (main_compose_sockets(env, IMSG_CFG_SRV, -1, srv, sizeof(*srv))
68 	    == -1)
69 		fatal("main_compose_sockets IMSG_CFG_SRV");
70 	return 0;
71 }
72 
73 int
74 config_getserver(struct gotwebd *env, struct imsg *imsg)
75 {
76 	struct server *srv;
77 	uint8_t *p = imsg->data;
78 
79 	srv = calloc(1, sizeof(*srv));
80 	if (srv == NULL)
81 		fatalx("%s: calloc", __func__);
82 
83 	IMSG_SIZE_CHECK(imsg, srv);
84 
85 	memcpy(srv, p, sizeof(*srv));
86 	srv->cached_repos = calloc(GOTWEBD_REPO_CACHESIZE,
87 	    sizeof(*srv->cached_repos));
88 	if (srv->cached_repos == NULL)
89 		fatal("%s: calloc", __func__);
90 	srv->ncached_repos = 0;
91 
92 	/* log server info */
93 	log_debug("%s: server=%s fcgi_socket=%s unix_socket=%s", __func__,
94 	    srv->name, srv->fcgi_socket ? "yes" : "no", srv->unix_socket ?
95 	    "yes" : "no");
96 
97 	TAILQ_INSERT_TAIL(&env->servers, srv, entry);
98 
99 	return 0;
100 }
101 
102 int
103 config_setsock(struct gotwebd *env, struct socket *sock)
104 {
105 	/* open listening sockets */
106 	if (sockets_privinit(env, sock) == -1)
107 		return -1;
108 
109 	if (main_compose_sockets(env, IMSG_CFG_SOCK, sock->fd,
110 	    &sock->conf, sizeof(sock->conf)) == -1)
111 		fatal("main_compose_sockets IMSG_CFG_SOCK");
112 
113 	sock->fd = -1;
114 	return 0;
115 }
116 
117 int
118 config_getsock(struct gotwebd *env, struct imsg *imsg)
119 {
120 	struct socket *sock = NULL;
121 	struct socket_conf sock_conf;
122 	uint8_t *p = imsg->data;
123 	int i;
124 
125 	IMSG_SIZE_CHECK(imsg, &sock_conf);
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 		if (imsg->fd != -1)
136 			close(imsg->fd);
137 		return 1;
138 	}
139 
140 	memcpy(&sock->conf, &sock_conf, sizeof(sock->conf));
141 	sock->fd = imsg->fd;
142 
143 	TAILQ_INSERT_TAIL(&env->sockets, sock, entry);
144 
145 	for (i = 0; i < PRIV_FDS__MAX; i++)
146 		sock->priv_fd[i] = -1;
147 
148 	for (i = 0; i < GOTWEB_PACK_NUM_TEMPFILES; i++)
149 		sock->pack_fds[i] = -1;
150 
151 	/* log new socket info */
152 	log_debug("%s: name=%s id=%d server=%s af_type=%s socket_path=%s",
153 	    __func__, sock->conf.name, sock->conf.id, sock->conf.srv_name,
154 	    sock->conf.af_type == AF_UNIX ? "unix" :
155 	    (sock->conf.af_type == AF_INET ? "inet" :
156 	    (sock->conf.af_type == AF_INET6 ? "inet6" : "unknown")),
157 	    *sock->conf.unix_socket_name != '\0' ?
158 	    sock->conf.unix_socket_name : "none");
159 
160 	return 0;
161 }
162 
163 int
164 config_setfd(struct gotwebd *env, struct socket *sock)
165 {
166 	int i, j, ret, fd;
167 
168 	log_debug("%s: Allocating %d file descriptors",
169 	    __func__, PRIV_FDS__MAX + GOTWEB_PACK_NUM_TEMPFILES);
170 
171 	for (i = 0; i < PRIV_FDS__MAX + GOTWEB_PACK_NUM_TEMPFILES; i++) {
172 		for (j = 0; j < env->nserver; ++j) {
173 			fd = got_opentempfd();
174 			if (fd == -1)
175 				fatal("got_opentemp");
176 			if (imsg_compose_event(&env->iev_server[j],
177 			    IMSG_CFG_FD, 0, -1, fd, &sock->conf.id,
178 			    sizeof(sock->conf.id)) == -1)
179 				fatal("imsg_compose_event IMSG_CFG_FD");
180 
181 			do {
182 				ret = imsg_flush(&env->iev_server[j].ibuf);
183 			} while (ret == -1 && errno == EAGAIN);
184 			if (ret == -1)
185 				fatal("imsg_flush");
186 			imsg_event_add(&env->iev_server[j]);
187 		}
188 	}
189 
190 	return 0;
191 }
192 
193 int
194 config_getfd(struct gotwebd *env, struct imsg *imsg)
195 {
196 	struct socket *sock;
197 	uint8_t *p = imsg->data;
198 	int sock_id, match = 0, i;
199 
200 	IMSG_SIZE_CHECK(imsg, &sock_id);
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 				log_debug("%s: assigning socket %d priv_fd %d",
208 				    __func__, sock_id, imsg->fd);
209 				sock->priv_fd[i] = imsg->fd;
210 				match = 1;
211 				break;
212 			}
213 			if (sock->pack_fds[i - PRIV_FDS__MAX] == -1) {
214 				log_debug("%s: assigning socket %d pack_fd %d",
215 				    __func__, sock_id, imsg->fd);
216 				sock->pack_fds[i - PRIV_FDS__MAX] = imsg->fd;
217 				match = 1;
218 				break;
219 			}
220 		}
221 	}
222 
223 	if (match)
224 		return 0;
225 	else
226 		return 1;
227 }