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 	TAILQ_INIT(&env->addresses);
54 
55 	return 0;
56 }
57 
58 int
59 config_getcfg(struct gotwebd *env, struct imsg *imsg)
60 {
61 	/* nothing to do but tell gotwebd configuration is done */
62 	if (sockets_compose_main(env, IMSG_CFG_DONE, NULL, 0) == -1)
63 		fatal("sockets_compose_main IMSG_CFG_DONE");
64 	return 0;
65 }
66 
67 int
68 config_setserver(struct gotwebd *env, struct server *srv)
69 {
70 	if (main_compose_sockets(env, IMSG_CFG_SRV, -1, srv, sizeof(*srv))
71 	    == -1)
72 		fatal("main_compose_sockets IMSG_CFG_SRV");
73 	return 0;
74 }
75 
76 int
77 config_getserver(struct gotwebd *env, struct imsg *imsg)
78 {
79 	struct server *srv;
80 	uint8_t *p = imsg->data;
81 
82 	srv = calloc(1, sizeof(*srv));
83 	if (srv == NULL)
84 		fatalx("%s: calloc", __func__);
85 
86 	if (IMSG_DATA_SIZE(imsg) != sizeof(*srv))
87 		fatalx("%s: wrong size", __func__);
88 
89 	memcpy(srv, p, sizeof(*srv));
90 
91 	/* log server info */
92 	log_debug("%s: server=%s", __func__, srv->name);
93 
94 	TAILQ_INSERT_TAIL(&env->servers, srv, entry);
95 
96 	return 0;
97 }
98 
99 int
100 config_setsock(struct gotwebd *env, struct socket *sock)
101 {
102 	/* open listening sockets */
103 	if (sockets_privinit(env, sock) == -1)
104 		return -1;
105 
106 	if (main_compose_sockets(env, IMSG_CFG_SOCK, sock->fd,
107 	    &sock->conf, sizeof(sock->conf)) == -1)
108 		fatal("main_compose_sockets IMSG_CFG_SOCK");
109 
110 	sock->fd = -1;
111 	return 0;
112 }
113 
114 int
115 config_getsock(struct gotwebd *env, struct imsg *imsg)
116 {
117 	struct socket *sock = NULL;
118 	struct socket_conf sock_conf;
119 	uint8_t *p = imsg->data;
120 	int i;
121 
122 	if (IMSG_DATA_SIZE(imsg) != sizeof(sock_conf))
123 		fatalx("%s: wrong size", __func__);
124 
125 	memcpy(&sock_conf, p, sizeof(sock_conf));
126 
127 	if (IMSG_DATA_SIZE(imsg) != sizeof(sock_conf)) {
128 		log_debug("%s: imsg size error", __func__);
129 		return 1;
130 	}
131 
132 	/* create a new socket */
133 	if ((sock = calloc(1, sizeof(*sock))) == NULL) {
134 		return 1;
135 	}
136 
137 	memcpy(&sock->conf, &sock_conf, sizeof(sock->conf));
138 	sock->fd = imsg_get_fd(imsg);
139 
140 	TAILQ_INSERT_TAIL(&env->sockets, sock, entry);
141 
142 	for (i = 0; i < PRIV_FDS__MAX; i++)
143 		sock->priv_fd[i] = -1;
144 
145 	for (i = 0; i < GOTWEB_PACK_NUM_TEMPFILES; i++)
146 		sock->pack_fds[i] = -1;
147 
148 	/* log new socket info */
149 	log_debug("%s: id=%d af_type=%s socket_path=%s",
150 	    __func__, sock->conf.id,
151 	    sock->conf.af_type == AF_UNIX ? "unix" :
152 	    (sock->conf.af_type == AF_INET ? "inet" :
153 	    (sock->conf.af_type == AF_INET6 ? "inet6" : "unknown")),
154 	    *sock->conf.unix_socket_name != '\0' ?
155 	    sock->conf.unix_socket_name : "none");
156 
157 	return 0;
158 }
159 
160 int
161 config_setfd(struct gotwebd *env, struct socket *sock)
162 {
163 	int i, j, ret, fd;
164 
165 	log_debug("%s: Allocating %d file descriptors",
166 	    __func__, PRIV_FDS__MAX + GOTWEB_PACK_NUM_TEMPFILES);
167 
168 	for (i = 0; i < PRIV_FDS__MAX + GOTWEB_PACK_NUM_TEMPFILES; i++) {
169 		for (j = 0; j < env->nserver; ++j) {
170 			fd = got_opentempfd();
171 			if (fd == -1)
172 				fatal("got_opentemp");
173 			if (imsg_compose_event(&env->iev_server[j],
174 			    IMSG_CFG_FD, 0, -1, fd, &sock->conf.id,
175 			    sizeof(sock->conf.id)) == -1)
176 				fatal("imsg_compose_event IMSG_CFG_FD");
177 
178 			do {
179 				ret = imsg_flush(&env->iev_server[j].ibuf);
180 			} while (ret == -1 && errno == EAGAIN);
181 			if (ret == -1)
182 				fatal("imsg_flush");
183 			imsg_event_add(&env->iev_server[j]);
184 		}
185 	}
186 
187 	return 0;
188 }
189 
190 int
191 config_getfd(struct gotwebd *env, struct imsg *imsg)
192 {
193 	struct socket *sock;
194 	uint8_t *p = imsg->data;
195 	int sock_id, match = 0, i, j;
196 
197 	if (IMSG_DATA_SIZE(imsg) != sizeof(sock_id))
198 		fatalx("%s: wrong size", __func__);
199 
200 	memcpy(&sock_id, p, sizeof(sock_id));
201 
202 	TAILQ_FOREACH(sock, &env->sockets, entry) {
203 		const int nfds = (GOTWEB_PACK_NUM_TEMPFILES + PRIV_FDS__MAX);
204 		for (i = 0; i < nfds; i++) {
205 			if (i < PRIV_FDS__MAX && sock->priv_fd[i] == -1) {
206 				sock->priv_fd[i] = imsg_get_fd(imsg);
207 				log_debug("%s: assigning socket %d priv_fd %d",
208 				    __func__, sock_id, sock->priv_fd[i]);
209 				match = 1;
210 				break;
211 			}
212 
213 			j = i - PRIV_FDS__MAX;
214 			if (sock->pack_fds[j] == -1) {
215 				sock->pack_fds[j] = imsg_get_fd(imsg);
216 				log_debug("%s: assigning socket %d pack_fd %d",
217 				    __func__, sock_id, sock->pack_fds[j]);
218 				match = 1;
219 				break;
220 			}
221 		}
222 	}
223 
224 	if (match)
225 		return 0;
226 	else
227 		return 1;
228 }