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 <util.h>
36 #include <errno.h>
37 #include <imsg.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 }