1 ba97b2d7 2024-03-20 stsp /*
  2 ba97b2d7 2024-03-20 stsp  * Copyright (c) 2024 Stefan Sperling <stsp@openbsd.org>
  3 ba97b2d7 2024-03-20 stsp  *
  4 ba97b2d7 2024-03-20 stsp  * Permission to use, copy, modify, and distribute this software for any
  5 ba97b2d7 2024-03-20 stsp  * purpose with or without fee is hereby granted, provided that the above
  6 ba97b2d7 2024-03-20 stsp  * copyright notice and this permission notice appear in all copies.
  7 ba97b2d7 2024-03-20 stsp  *
  8 ba97b2d7 2024-03-20 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 ba97b2d7 2024-03-20 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 ba97b2d7 2024-03-20 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 ba97b2d7 2024-03-20 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 ba97b2d7 2024-03-20 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 ba97b2d7 2024-03-20 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 ba97b2d7 2024-03-20 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 ba97b2d7 2024-03-20 stsp  */
 16 ba97b2d7 2024-03-20 stsp 
 17 ba97b2d7 2024-03-20 stsp #include <sys/types.h>
 18 ba97b2d7 2024-03-20 stsp #include <sys/queue.h>
 19 ba97b2d7 2024-03-20 stsp #include <sys/tree.h>
 20 ba97b2d7 2024-03-20 stsp #include <sys/socket.h>
 21 ba97b2d7 2024-03-20 stsp #include <sys/wait.h>
 22 ba97b2d7 2024-03-20 stsp 
 23 ba97b2d7 2024-03-20 stsp #include <errno.h>
 24 ba97b2d7 2024-03-20 stsp #include <event.h>
 25 ba97b2d7 2024-03-20 stsp #include <siphash.h>
 26 ba97b2d7 2024-03-20 stsp #include <limits.h>
 27 ba97b2d7 2024-03-20 stsp #include <sha1.h>
 28 ba97b2d7 2024-03-20 stsp #include <sha2.h>
 29 ba97b2d7 2024-03-20 stsp #include <signal.h>
 30 ba97b2d7 2024-03-20 stsp #include <stdio.h>
 31 ba97b2d7 2024-03-20 stsp #include <stdlib.h>
 32 ba97b2d7 2024-03-20 stsp #include <string.h>
 33 ba97b2d7 2024-03-20 stsp #include <imsg.h>
 34 ba97b2d7 2024-03-20 stsp #include <unistd.h>
 35 ba97b2d7 2024-03-20 stsp 
 36 ba97b2d7 2024-03-20 stsp #include "got_error.h"
 37 ba97b2d7 2024-03-20 stsp #include "got_path.h"
 38 ba97b2d7 2024-03-20 stsp 
 39 ba97b2d7 2024-03-20 stsp #include "gotd.h"
 40 ba97b2d7 2024-03-20 stsp #include "log.h"
 41 ba97b2d7 2024-03-20 stsp #include "notify.h"
 42 ba97b2d7 2024-03-20 stsp 
 43 ba97b2d7 2024-03-20 stsp #ifndef nitems
 44 ba97b2d7 2024-03-20 stsp #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
 45 ba97b2d7 2024-03-20 stsp #endif
 46 ba97b2d7 2024-03-20 stsp 
 47 ba97b2d7 2024-03-20 stsp static struct gotd_notify {
 48 ba97b2d7 2024-03-20 stsp 	pid_t pid;
 49 ba97b2d7 2024-03-20 stsp 	const char *title;
 50 ba97b2d7 2024-03-20 stsp 	struct gotd_imsgev parent_iev;
 51 ba97b2d7 2024-03-20 stsp 	struct gotd_repolist *repos;
 52 ba97b2d7 2024-03-20 stsp 	const char *default_sender;
 53 ba97b2d7 2024-03-20 stsp } gotd_notify;
 54 ba97b2d7 2024-03-20 stsp 
 55 ba97b2d7 2024-03-20 stsp struct gotd_notify_session {
 56 ba97b2d7 2024-03-20 stsp 	STAILQ_ENTRY(gotd_notify_session) entry;
 57 ba97b2d7 2024-03-20 stsp 	uint32_t id;
 58 ba97b2d7 2024-03-20 stsp 	struct gotd_imsgev iev;
 59 ba97b2d7 2024-03-20 stsp };
 60 ba97b2d7 2024-03-20 stsp STAILQ_HEAD(gotd_notify_sessions, gotd_notify_session);
 61 ba97b2d7 2024-03-20 stsp 
 62 ba97b2d7 2024-03-20 stsp static struct gotd_notify_sessions gotd_notify_sessions[GOTD_CLIENT_TABLE_SIZE];
 63 ba97b2d7 2024-03-20 stsp static SIPHASH_KEY sessions_hash_key;
 64 ba97b2d7 2024-03-20 stsp 
 65 ba97b2d7 2024-03-20 stsp static void gotd_notify_shutdown(void);
 66 ba97b2d7 2024-03-20 stsp 
 67 ba97b2d7 2024-03-20 stsp static uint64_t
 68 ba97b2d7 2024-03-20 stsp session_hash(uint32_t session_id)
 69 ba97b2d7 2024-03-20 stsp {
 70 ba97b2d7 2024-03-20 stsp 	return SipHash24(&sessions_hash_key, &session_id, sizeof(session_id));
 71 ba97b2d7 2024-03-20 stsp }
 72 ba97b2d7 2024-03-20 stsp 
 73 ba97b2d7 2024-03-20 stsp static void
 74 ba97b2d7 2024-03-20 stsp add_session(struct gotd_notify_session *session)
 75 ba97b2d7 2024-03-20 stsp {
 76 ba97b2d7 2024-03-20 stsp 	uint64_t slot;
 77 ba97b2d7 2024-03-20 stsp 
 78 ba97b2d7 2024-03-20 stsp 	slot = session_hash(session->id) % nitems(gotd_notify_sessions);
 79 ba97b2d7 2024-03-20 stsp 	STAILQ_INSERT_HEAD(&gotd_notify_sessions[slot], session, entry);
 80 ba97b2d7 2024-03-20 stsp }
 81 ba97b2d7 2024-03-20 stsp 
 82 ba97b2d7 2024-03-20 stsp static struct gotd_notify_session *
 83 ba97b2d7 2024-03-20 stsp find_session(uint32_t session_id)
 84 ba97b2d7 2024-03-20 stsp {
 85 ba97b2d7 2024-03-20 stsp 	uint64_t slot;
 86 ba97b2d7 2024-03-20 stsp 	struct gotd_notify_session *s;
 87 ba97b2d7 2024-03-20 stsp 
 88 ba97b2d7 2024-03-20 stsp 	slot = session_hash(session_id) % nitems(gotd_notify_sessions);
 89 ba97b2d7 2024-03-20 stsp 	STAILQ_FOREACH(s, &gotd_notify_sessions[slot], entry) {
 90 ba97b2d7 2024-03-20 stsp 		if (s->id == session_id)
 91 ba97b2d7 2024-03-20 stsp 			return s;
 92 ba97b2d7 2024-03-20 stsp 	}
 93 ba97b2d7 2024-03-20 stsp 
 94 ba97b2d7 2024-03-20 stsp 	return NULL;
 95 ba97b2d7 2024-03-20 stsp }
 96 ba97b2d7 2024-03-20 stsp 
 97 ba97b2d7 2024-03-20 stsp static struct gotd_notify_session *
 98 ba97b2d7 2024-03-20 stsp find_session_by_fd(int fd)
 99 ba97b2d7 2024-03-20 stsp {
100 ba97b2d7 2024-03-20 stsp 	uint64_t slot;
101 ba97b2d7 2024-03-20 stsp 	struct gotd_notify_session *s;
102 ba97b2d7 2024-03-20 stsp 
103 ba97b2d7 2024-03-20 stsp 	for (slot = 0; slot < nitems(gotd_notify_sessions); slot++) {
104 ba97b2d7 2024-03-20 stsp 		STAILQ_FOREACH(s, &gotd_notify_sessions[slot], entry) {
105 ba97b2d7 2024-03-20 stsp 			if (s->iev.ibuf.fd == fd)
106 ba97b2d7 2024-03-20 stsp 				return s;
107 ba97b2d7 2024-03-20 stsp 		}
108 ba97b2d7 2024-03-20 stsp 	}
109 ba97b2d7 2024-03-20 stsp 
110 ba97b2d7 2024-03-20 stsp 	return NULL;
111 ba97b2d7 2024-03-20 stsp }
112 ba97b2d7 2024-03-20 stsp 
113 ba97b2d7 2024-03-20 stsp static void
114 ba97b2d7 2024-03-20 stsp remove_session(struct gotd_notify_session *session)
115 ba97b2d7 2024-03-20 stsp {
116 ba97b2d7 2024-03-20 stsp 	uint64_t slot;
117 ba97b2d7 2024-03-20 stsp 
118 ba97b2d7 2024-03-20 stsp 	slot = session_hash(session->id) % nitems(gotd_notify_sessions);
119 ba97b2d7 2024-03-20 stsp 	STAILQ_REMOVE(&gotd_notify_sessions[slot], session,
120 ba97b2d7 2024-03-20 stsp 	    gotd_notify_session, entry);
121 ba97b2d7 2024-03-20 stsp 	free(session);
122 ba97b2d7 2024-03-20 stsp }
123 ba97b2d7 2024-03-20 stsp 
124 ba97b2d7 2024-03-20 stsp static uint32_t
125 ba97b2d7 2024-03-20 stsp get_session_id(void)
126 ba97b2d7 2024-03-20 stsp {
127 ba97b2d7 2024-03-20 stsp 	int duplicate = 0;
128 ba97b2d7 2024-03-20 stsp 	uint32_t id;
129 ba97b2d7 2024-03-20 stsp 
130 ba97b2d7 2024-03-20 stsp 	do {
131 ba97b2d7 2024-03-20 stsp 		id = arc4random();
132 ba97b2d7 2024-03-20 stsp 		duplicate = (find_session(id) != NULL);
133 ba97b2d7 2024-03-20 stsp 	} while (duplicate || id == 0);
134 ba97b2d7 2024-03-20 stsp 
135 ba97b2d7 2024-03-20 stsp 	return id;
136 ba97b2d7 2024-03-20 stsp }
137 ba97b2d7 2024-03-20 stsp 
138 ba97b2d7 2024-03-20 stsp static void
139 ba97b2d7 2024-03-20 stsp gotd_notify_sighdlr(int sig, short event, void *arg)
140 ba97b2d7 2024-03-20 stsp {
141 ba97b2d7 2024-03-20 stsp 	/*
142 ba97b2d7 2024-03-20 stsp 	 * Normal signal handler rules don't apply because libevent
143 ba97b2d7 2024-03-20 stsp 	 * decouples for us.
144 ba97b2d7 2024-03-20 stsp 	 */
145 ba97b2d7 2024-03-20 stsp 
146 ba97b2d7 2024-03-20 stsp 	switch (sig) {
147 ba97b2d7 2024-03-20 stsp 	case SIGHUP:
148 ba97b2d7 2024-03-20 stsp 		log_info("%s: ignoring SIGHUP", __func__);
149 ba97b2d7 2024-03-20 stsp 		break;
150 ba97b2d7 2024-03-20 stsp 	case SIGUSR1:
151 ba97b2d7 2024-03-20 stsp 		log_info("%s: ignoring SIGUSR1", __func__);
152 ba97b2d7 2024-03-20 stsp 		break;
153 ba97b2d7 2024-03-20 stsp 	case SIGTERM:
154 ba97b2d7 2024-03-20 stsp 	case SIGINT:
155 ba97b2d7 2024-03-20 stsp 		gotd_notify_shutdown();
156 ba97b2d7 2024-03-20 stsp 		/* NOTREACHED */
157 ba97b2d7 2024-03-20 stsp 		break;
158 ba97b2d7 2024-03-20 stsp 	default:
159 ba97b2d7 2024-03-20 stsp 		fatalx("unexpected signal");
160 ba97b2d7 2024-03-20 stsp 	}
161 ba97b2d7 2024-03-20 stsp }
162 ba97b2d7 2024-03-20 stsp 
163 ba97b2d7 2024-03-20 stsp static void
164 ba97b2d7 2024-03-20 stsp run_notification_helper(const char *prog, const char **argv, int fd)
165 ba97b2d7 2024-03-20 stsp {
166 ba97b2d7 2024-03-20 stsp 	const struct got_error *err = NULL;
167 ba97b2d7 2024-03-20 stsp 	pid_t pid;
168 ba97b2d7 2024-03-20 stsp 	int child_status;
169 ba97b2d7 2024-03-20 stsp 
170 ba97b2d7 2024-03-20 stsp 	pid = fork();
171 ba97b2d7 2024-03-20 stsp 	if (pid == -1) {
172 ba97b2d7 2024-03-20 stsp 		err = got_error_from_errno("fork");
173 ba97b2d7 2024-03-20 stsp 		log_warn("%s", err->msg);
174 ba97b2d7 2024-03-20 stsp 		return;
175 ba97b2d7 2024-03-20 stsp 	} else if (pid == 0) {
176 ba97b2d7 2024-03-20 stsp 		signal(SIGQUIT, SIG_DFL);
177 ba97b2d7 2024-03-20 stsp 		signal(SIGINT, SIG_DFL);
178 ba97b2d7 2024-03-20 stsp 		signal(SIGCHLD, SIG_DFL);
179 ba97b2d7 2024-03-20 stsp 
180 ba97b2d7 2024-03-20 stsp 		if (dup2(fd, STDIN_FILENO) == -1) {
181 ba97b2d7 2024-03-20 stsp 			fprintf(stderr, "%s: dup2: %s\n", getprogname(),
182 ba97b2d7 2024-03-20 stsp 			    strerror(errno));
183 ba97b2d7 2024-03-20 stsp 			_exit(1);
184 ba97b2d7 2024-03-20 stsp 		}
185 ba97b2d7 2024-03-20 stsp 
186 ba97b2d7 2024-03-20 stsp 		closefrom(STDERR_FILENO + 1);
187 ba97b2d7 2024-03-20 stsp 
188 ba97b2d7 2024-03-20 stsp 		if (execv(prog, (char *const *)argv) == -1) {
189 ba97b2d7 2024-03-20 stsp 			fprintf(stderr, "%s: exec %s: %s\n", getprogname(),
190 ba97b2d7 2024-03-20 stsp 			    prog, strerror(errno));
191 ba97b2d7 2024-03-20 stsp 			_exit(1);
192 ba97b2d7 2024-03-20 stsp 		}
193 ba97b2d7 2024-03-20 stsp 
194 ba97b2d7 2024-03-20 stsp 		/* not reached */
195 ba97b2d7 2024-03-20 stsp 	}
196 ba97b2d7 2024-03-20 stsp 
197 ba97b2d7 2024-03-20 stsp 	if (waitpid(pid, &child_status, 0) == -1) {
198 ba97b2d7 2024-03-20 stsp 		err = got_error_from_errno("waitpid");
199 ba97b2d7 2024-03-20 stsp 		goto done;
200 ba97b2d7 2024-03-20 stsp 	}
201 ba97b2d7 2024-03-20 stsp 
202 ba97b2d7 2024-03-20 stsp 	if (!WIFEXITED(child_status)) {
203 ba97b2d7 2024-03-20 stsp 		err = got_error(GOT_ERR_PRIVSEP_DIED);
204 ba97b2d7 2024-03-20 stsp 		goto done;
205 ba97b2d7 2024-03-20 stsp 	}
206 ba97b2d7 2024-03-20 stsp 
207 ba97b2d7 2024-03-20 stsp 	if (WEXITSTATUS(child_status) != 0)
208 ba97b2d7 2024-03-20 stsp 		err = got_error(GOT_ERR_PRIVSEP_EXIT);
209 ba97b2d7 2024-03-20 stsp done:
210 ba97b2d7 2024-03-20 stsp 	if (err)
211 ba97b2d7 2024-03-20 stsp 		log_warnx("%s: child %s pid %d: %s", gotd_notify.title,
212 ba97b2d7 2024-03-20 stsp 		    prog, pid, err->msg);
213 ba97b2d7 2024-03-20 stsp }
214 ba97b2d7 2024-03-20 stsp 
215 ba97b2d7 2024-03-20 stsp static void
216 ba97b2d7 2024-03-20 stsp notify_email(struct gotd_notification_target *target, const char *subject_line,
217 ba97b2d7 2024-03-20 stsp     int fd)
218 ba97b2d7 2024-03-20 stsp {
219 ba97b2d7 2024-03-20 stsp 	const char *argv[13];
220 ba97b2d7 2024-03-20 stsp 	int i = 0;
221 ba97b2d7 2024-03-20 stsp 
222 ba97b2d7 2024-03-20 stsp 	argv[i++] = GOTD_PATH_PROG_NOTIFY_EMAIL;
223 ba97b2d7 2024-03-20 stsp 
224 ba97b2d7 2024-03-20 stsp 	argv[i++] = "-f";
225 ba97b2d7 2024-03-20 stsp 	if (target->conf.email.sender)
226 ba97b2d7 2024-03-20 stsp 		argv[i++] = target->conf.email.sender;
227 ba97b2d7 2024-03-20 stsp 	else
228 ba97b2d7 2024-03-20 stsp 		argv[i++] = gotd_notify.default_sender;
229 ba97b2d7 2024-03-20 stsp 
230 ba97b2d7 2024-03-20 stsp 	if (target->conf.email.responder) {
231 ba97b2d7 2024-03-20 stsp 		argv[i++] = "-r";
232 ba97b2d7 2024-03-20 stsp 		argv[i++] = target->conf.email.responder;
233 ba97b2d7 2024-03-20 stsp 	}
234 ba97b2d7 2024-03-20 stsp 
235 ba97b2d7 2024-03-20 stsp 	if (target->conf.email.hostname) {
236 ba97b2d7 2024-03-20 stsp 		argv[i++] = "-h";
237 ba97b2d7 2024-03-20 stsp 		argv[i++] = target->conf.email.hostname;
238 ba97b2d7 2024-03-20 stsp 	}
239 ba97b2d7 2024-03-20 stsp 	
240 ba97b2d7 2024-03-20 stsp 	if (target->conf.email.port) {
241 ba97b2d7 2024-03-20 stsp 		argv[i++] = "-p";
242 ba97b2d7 2024-03-20 stsp 		argv[i++] = target->conf.email.port;
243 ba97b2d7 2024-03-20 stsp 	}
244 ba97b2d7 2024-03-20 stsp 
245 ba97b2d7 2024-03-20 stsp 	argv[i++] = "-s";
246 ba97b2d7 2024-03-20 stsp 	argv[i++] = subject_line;
247 ba97b2d7 2024-03-20 stsp 
248 ba97b2d7 2024-03-20 stsp 	argv[i++] = target->conf.email.recipient;
249 ba97b2d7 2024-03-20 stsp 
250 ba97b2d7 2024-03-20 stsp 	argv[i] = NULL;
251 ba97b2d7 2024-03-20 stsp 
252 ba97b2d7 2024-03-20 stsp 	run_notification_helper(GOTD_PATH_PROG_NOTIFY_EMAIL, argv, fd);
253 ba97b2d7 2024-03-20 stsp }
254 ba97b2d7 2024-03-20 stsp 
255 ba97b2d7 2024-03-20 stsp static void
256 5565365c 2024-03-27 op notify_http(struct gotd_notification_target *target, int fd)
257 ba97b2d7 2024-03-20 stsp {
258 5565365c 2024-03-27 op 	const char *argv[8];
259 5565365c 2024-03-27 op 	int argc = 0;
260 ba97b2d7 2024-03-20 stsp 
261 5565365c 2024-03-27 op 	argv[argc++] = GOTD_PATH_PROG_NOTIFY_HTTP;
262 5565365c 2024-03-27 op 	if (target->conf.http.tls)
263 5565365c 2024-03-27 op 		argv[argc++] = "-c";
264 5565365c 2024-03-27 op 
265 5565365c 2024-03-27 op 	argv[argc++] = "-h";
266 5565365c 2024-03-27 op 	argv[argc++] = target->conf.http.hostname;
267 5565365c 2024-03-27 op 	argv[argc++] = "-p";
268 5565365c 2024-03-27 op 	argv[argc++] = target->conf.http.port;
269 5565365c 2024-03-27 op 
270 5565365c 2024-03-27 op 	argv[argc++] = target->conf.http.path;
271 5565365c 2024-03-27 op 
272 5565365c 2024-03-27 op 	argv[argc] = NULL;
273 5565365c 2024-03-27 op 
274 ba97b2d7 2024-03-20 stsp 	run_notification_helper(GOTD_PATH_PROG_NOTIFY_HTTP, argv, fd);
275 ba97b2d7 2024-03-20 stsp }
276 ba97b2d7 2024-03-20 stsp 
277 ba97b2d7 2024-03-20 stsp static const struct got_error *
278 ba97b2d7 2024-03-20 stsp send_notification(struct imsg *imsg, struct gotd_imsgev *iev)
279 ba97b2d7 2024-03-20 stsp {
280 ba97b2d7 2024-03-20 stsp 	const struct got_error *err = NULL;
281 ba97b2d7 2024-03-20 stsp 	struct gotd_imsg_notify inotify;
282 ba97b2d7 2024-03-20 stsp 	size_t datalen;
283 ba97b2d7 2024-03-20 stsp 	struct gotd_repo *repo;
284 ba97b2d7 2024-03-20 stsp 	struct gotd_notification_target *target;
285 ba97b2d7 2024-03-20 stsp 	int fd;
286 ba97b2d7 2024-03-20 stsp 
287 ba97b2d7 2024-03-20 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
288 ba97b2d7 2024-03-20 stsp 	if (datalen != sizeof(inotify))
289 ba97b2d7 2024-03-20 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
290 ba97b2d7 2024-03-20 stsp 
291 ba97b2d7 2024-03-20 stsp 	memcpy(&inotify, imsg->data, datalen);
292 ba97b2d7 2024-03-20 stsp 
293 ba97b2d7 2024-03-20 stsp 	repo = gotd_find_repo_by_name(inotify.repo_name, gotd_notify.repos);
294 ba97b2d7 2024-03-20 stsp 	if (repo == NULL)
295 ba97b2d7 2024-03-20 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
296 ba97b2d7 2024-03-20 stsp 
297 ba97b2d7 2024-03-20 stsp 	fd = imsg_get_fd(imsg);
298 ba97b2d7 2024-03-20 stsp 	if (fd == -1)
299 ba97b2d7 2024-03-20 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
300 ba97b2d7 2024-03-20 stsp 
301 ba97b2d7 2024-03-20 stsp 	if (lseek(fd, 0, SEEK_SET) == -1) {
302 ba97b2d7 2024-03-20 stsp 		err = got_error_from_errno("lseek");
303 ba97b2d7 2024-03-20 stsp 		goto done;
304 ba97b2d7 2024-03-20 stsp 	}
305 ba97b2d7 2024-03-20 stsp 
306 ba97b2d7 2024-03-20 stsp 	STAILQ_FOREACH(target, &repo->notification_targets, entry) {
307 ba97b2d7 2024-03-20 stsp 		switch (target->type) {
308 ba97b2d7 2024-03-20 stsp 		case GOTD_NOTIFICATION_VIA_EMAIL:
309 ba97b2d7 2024-03-20 stsp 			notify_email(target, inotify.subject_line, fd);
310 ba97b2d7 2024-03-20 stsp 			break;
311 ba97b2d7 2024-03-20 stsp 		case GOTD_NOTIFICATION_VIA_HTTP:
312 5565365c 2024-03-27 op 			notify_http(target, fd);
313 ba97b2d7 2024-03-20 stsp 			break;
314 ba97b2d7 2024-03-20 stsp 		}
315 ba97b2d7 2024-03-20 stsp 	}
316 ba97b2d7 2024-03-20 stsp 
317 ba97b2d7 2024-03-20 stsp 	if (gotd_imsg_compose_event(iev, GOTD_IMSG_NOTIFICATION_SENT,
318 ba97b2d7 2024-03-20 stsp 	    PROC_NOTIFY, -1, NULL, 0) == -1) {
319 ba97b2d7 2024-03-20 stsp 		err = got_error_from_errno("imsg compose NOTIFY");
320 ba97b2d7 2024-03-20 stsp 		goto done;
321 ba97b2d7 2024-03-20 stsp 	}
322 ba97b2d7 2024-03-20 stsp done:
323 ba97b2d7 2024-03-20 stsp 	close(fd);
324 ba97b2d7 2024-03-20 stsp 	return err;
325 ba97b2d7 2024-03-20 stsp }
326 ba97b2d7 2024-03-20 stsp 
327 ba97b2d7 2024-03-20 stsp static void
328 ba97b2d7 2024-03-20 stsp notify_dispatch_session(int fd, short event, void *arg)
329 ba97b2d7 2024-03-20 stsp {
330 ba97b2d7 2024-03-20 stsp 	struct gotd_imsgev *iev = arg;
331 ba97b2d7 2024-03-20 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
332 ba97b2d7 2024-03-20 stsp 	ssize_t n;
333 ba97b2d7 2024-03-20 stsp 	int shut = 0;
334 ba97b2d7 2024-03-20 stsp 	struct imsg imsg;
335 ba97b2d7 2024-03-20 stsp 
336 ba97b2d7 2024-03-20 stsp 	if (event & EV_READ) {
337 ba97b2d7 2024-03-20 stsp 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
338 ba97b2d7 2024-03-20 stsp 			fatal("imsg_read error");
339 ba97b2d7 2024-03-20 stsp 		if (n == 0) {
340 ba97b2d7 2024-03-20 stsp 			/* Connection closed. */
341 ba97b2d7 2024-03-20 stsp 			shut = 1;
342 ba97b2d7 2024-03-20 stsp 			goto done;
343 ba97b2d7 2024-03-20 stsp 		}
344 ba97b2d7 2024-03-20 stsp 	}
345 ba97b2d7 2024-03-20 stsp 
346 ba97b2d7 2024-03-20 stsp 	if (event & EV_WRITE) {
347 ba97b2d7 2024-03-20 stsp 		n = msgbuf_write(&ibuf->w);
348 ba97b2d7 2024-03-20 stsp 		if (n == -1 && errno != EAGAIN)
349 ba97b2d7 2024-03-20 stsp 			fatal("msgbuf_write");
350 ba97b2d7 2024-03-20 stsp 		if (n == 0) {
351 ba97b2d7 2024-03-20 stsp 			/* Connection closed. */
352 ba97b2d7 2024-03-20 stsp 			shut = 1;
353 ba97b2d7 2024-03-20 stsp 			goto done;
354 ba97b2d7 2024-03-20 stsp 		}
355 ba97b2d7 2024-03-20 stsp 	}
356 ba97b2d7 2024-03-20 stsp 
357 ba97b2d7 2024-03-20 stsp 	for (;;) {
358 ba97b2d7 2024-03-20 stsp 		const struct got_error *err = NULL;
359 ba97b2d7 2024-03-20 stsp 
360 ba97b2d7 2024-03-20 stsp 		if ((n = imsg_get(ibuf, &imsg)) == -1)
361 ba97b2d7 2024-03-20 stsp 			fatal("%s: imsg_get error", __func__);
362 ba97b2d7 2024-03-20 stsp 		if (n == 0)	/* No more messages. */
363 ba97b2d7 2024-03-20 stsp 			break;
364 ba97b2d7 2024-03-20 stsp 
365 ba97b2d7 2024-03-20 stsp 		switch (imsg.hdr.type) {
366 ba97b2d7 2024-03-20 stsp 		case GOTD_IMSG_NOTIFY:
367 ba97b2d7 2024-03-20 stsp 			err = send_notification(&imsg, iev);
368 ba97b2d7 2024-03-20 stsp 			break;
369 ba97b2d7 2024-03-20 stsp 		default:
370 ba97b2d7 2024-03-20 stsp 			log_debug("unexpected imsg %d", imsg.hdr.type);
371 ba97b2d7 2024-03-20 stsp 			break;
372 ba97b2d7 2024-03-20 stsp 		}
373 ba97b2d7 2024-03-20 stsp 		imsg_free(&imsg);
374 ba97b2d7 2024-03-20 stsp 
375 ba97b2d7 2024-03-20 stsp 		if (err)
376 ba97b2d7 2024-03-20 stsp 			log_warnx("%s: %s", __func__, err->msg);
377 ba97b2d7 2024-03-20 stsp 	}
378 ba97b2d7 2024-03-20 stsp done:
379 ba97b2d7 2024-03-20 stsp 	if (!shut) {
380 ba97b2d7 2024-03-20 stsp 		gotd_imsg_event_add(iev);
381 ba97b2d7 2024-03-20 stsp 	} else {
382 ba97b2d7 2024-03-20 stsp 		struct gotd_notify_session *session;
383 ba97b2d7 2024-03-20 stsp 
384 ba97b2d7 2024-03-20 stsp 		/* This pipe is dead. Remove its event handler */
385 ba97b2d7 2024-03-20 stsp 		event_del(&iev->ev);
386 ba97b2d7 2024-03-20 stsp 		imsg_clear(&iev->ibuf);
387 ba97b2d7 2024-03-20 stsp 
388 ba97b2d7 2024-03-20 stsp 		session = find_session_by_fd(fd);
389 ba97b2d7 2024-03-20 stsp 		if (session)
390 ba97b2d7 2024-03-20 stsp 			remove_session(session);
391 ba97b2d7 2024-03-20 stsp 	}
392 ba97b2d7 2024-03-20 stsp }
393 ba97b2d7 2024-03-20 stsp 
394 ba97b2d7 2024-03-20 stsp static const struct got_error *
395 ba97b2d7 2024-03-20 stsp recv_session(struct imsg *imsg)
396 ba97b2d7 2024-03-20 stsp {
397 ba97b2d7 2024-03-20 stsp 	struct gotd_notify_session *session;
398 ba97b2d7 2024-03-20 stsp 	size_t datalen;
399 ba97b2d7 2024-03-20 stsp 	int fd;
400 ba97b2d7 2024-03-20 stsp 
401 ba97b2d7 2024-03-20 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
402 ba97b2d7 2024-03-20 stsp 	if (datalen != 0)
403 ba97b2d7 2024-03-20 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
404 ba97b2d7 2024-03-20 stsp 
405 ba97b2d7 2024-03-20 stsp 	fd = imsg_get_fd(imsg);
406 ba97b2d7 2024-03-20 stsp 	if (fd == -1)
407 ba97b2d7 2024-03-20 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
408 ba97b2d7 2024-03-20 stsp 
409 ba97b2d7 2024-03-20 stsp 	session = calloc(1, sizeof(*session));
410 ba97b2d7 2024-03-20 stsp 	if (session == NULL)
411 ba97b2d7 2024-03-20 stsp 		return got_error_from_errno("calloc");
412 ba97b2d7 2024-03-20 stsp 
413 ba97b2d7 2024-03-20 stsp 	session->id = get_session_id();
414 ba97b2d7 2024-03-20 stsp 	imsg_init(&session->iev.ibuf, fd);
415 ba97b2d7 2024-03-20 stsp 	session->iev.handler = notify_dispatch_session;
416 ba97b2d7 2024-03-20 stsp 	session->iev.events = EV_READ;
417 ba97b2d7 2024-03-20 stsp 	session->iev.handler_arg = NULL;
418 ba97b2d7 2024-03-20 stsp 	event_set(&session->iev.ev, session->iev.ibuf.fd, EV_READ,
419 ba97b2d7 2024-03-20 stsp 	    notify_dispatch_session, &session->iev);
420 ba97b2d7 2024-03-20 stsp 	gotd_imsg_event_add(&session->iev);
421 ba97b2d7 2024-03-20 stsp 	add_session(session);
422 ba97b2d7 2024-03-20 stsp 
423 ba97b2d7 2024-03-20 stsp 	return NULL;
424 ba97b2d7 2024-03-20 stsp }
425 ba97b2d7 2024-03-20 stsp 
426 ba97b2d7 2024-03-20 stsp static void
427 ba97b2d7 2024-03-20 stsp notify_dispatch(int fd, short event, void *arg)
428 ba97b2d7 2024-03-20 stsp {
429 ba97b2d7 2024-03-20 stsp 	struct gotd_imsgev *iev = arg;
430 ba97b2d7 2024-03-20 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
431 ba97b2d7 2024-03-20 stsp 	ssize_t n;
432 ba97b2d7 2024-03-20 stsp 	int shut = 0;
433 ba97b2d7 2024-03-20 stsp 	struct imsg imsg;
434 ba97b2d7 2024-03-20 stsp 
435 ba97b2d7 2024-03-20 stsp 	if (event & EV_READ) {
436 ba97b2d7 2024-03-20 stsp 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
437 ba97b2d7 2024-03-20 stsp 			fatal("imsg_read error");
438 ba97b2d7 2024-03-20 stsp 		if (n == 0) {
439 ba97b2d7 2024-03-20 stsp 			/* Connection closed. */
440 ba97b2d7 2024-03-20 stsp 			shut = 1;
441 ba97b2d7 2024-03-20 stsp 			goto done;
442 ba97b2d7 2024-03-20 stsp 		}
443 ba97b2d7 2024-03-20 stsp 	}
444 ba97b2d7 2024-03-20 stsp 
445 ba97b2d7 2024-03-20 stsp 	if (event & EV_WRITE) {
446 ba97b2d7 2024-03-20 stsp 		n = msgbuf_write(&ibuf->w);
447 ba97b2d7 2024-03-20 stsp 		if (n == -1 && errno != EAGAIN)
448 ba97b2d7 2024-03-20 stsp 			fatal("msgbuf_write");
449 ba97b2d7 2024-03-20 stsp 		if (n == 0) {
450 ba97b2d7 2024-03-20 stsp 			/* Connection closed. */
451 ba97b2d7 2024-03-20 stsp 			shut = 1;
452 ba97b2d7 2024-03-20 stsp 			goto done;
453 ba97b2d7 2024-03-20 stsp 		}
454 ba97b2d7 2024-03-20 stsp 	}
455 ba97b2d7 2024-03-20 stsp 
456 ba97b2d7 2024-03-20 stsp 	for (;;) {
457 ba97b2d7 2024-03-20 stsp 		const struct got_error *err = NULL;
458 ba97b2d7 2024-03-20 stsp 
459 ba97b2d7 2024-03-20 stsp 		if ((n = imsg_get(ibuf, &imsg)) == -1)
460 ba97b2d7 2024-03-20 stsp 			fatal("%s: imsg_get error", __func__);
461 ba97b2d7 2024-03-20 stsp 		if (n == 0)	/* No more messages. */
462 ba97b2d7 2024-03-20 stsp 			break;
463 ba97b2d7 2024-03-20 stsp 
464 ba97b2d7 2024-03-20 stsp 		switch (imsg.hdr.type) {
465 ba97b2d7 2024-03-20 stsp 		case GOTD_IMSG_CONNECT_SESSION:
466 ba97b2d7 2024-03-20 stsp 			err = recv_session(&imsg);
467 ba97b2d7 2024-03-20 stsp 			break;
468 ba97b2d7 2024-03-20 stsp 		default:
469 ba97b2d7 2024-03-20 stsp 			log_debug("unexpected imsg %d", imsg.hdr.type);
470 ba97b2d7 2024-03-20 stsp 			break;
471 ba97b2d7 2024-03-20 stsp 		}
472 ba97b2d7 2024-03-20 stsp 		imsg_free(&imsg);
473 ba97b2d7 2024-03-20 stsp 
474 ba97b2d7 2024-03-20 stsp 		if (err)
475 ba97b2d7 2024-03-20 stsp 			log_warnx("%s: %s", __func__, err->msg);
476 ba97b2d7 2024-03-20 stsp 	}
477 ba97b2d7 2024-03-20 stsp done:
478 ba97b2d7 2024-03-20 stsp 	if (!shut) {
479 ba97b2d7 2024-03-20 stsp 		gotd_imsg_event_add(iev);
480 ba97b2d7 2024-03-20 stsp 	} else {
481 ba97b2d7 2024-03-20 stsp 		/* This pipe is dead. Remove its event handler */
482 ba97b2d7 2024-03-20 stsp 		event_del(&iev->ev);
483 ba97b2d7 2024-03-20 stsp 		event_loopexit(NULL);
484 ba97b2d7 2024-03-20 stsp 	}
485 ba97b2d7 2024-03-20 stsp 
486 ba97b2d7 2024-03-20 stsp }
487 ba97b2d7 2024-03-20 stsp 
488 ba97b2d7 2024-03-20 stsp void
489 ba97b2d7 2024-03-20 stsp notify_main(const char *title, struct gotd_repolist *repos,
490 ba97b2d7 2024-03-20 stsp     const char *default_sender)
491 ba97b2d7 2024-03-20 stsp {
492 ba97b2d7 2024-03-20 stsp 	const struct got_error *err = NULL;
493 ba97b2d7 2024-03-20 stsp 	struct event evsigint, evsigterm, evsighup, evsigusr1;
494 ba97b2d7 2024-03-20 stsp 
495 ba97b2d7 2024-03-20 stsp 	arc4random_buf(&sessions_hash_key, sizeof(sessions_hash_key));
496 ba97b2d7 2024-03-20 stsp 
497 ba97b2d7 2024-03-20 stsp 	gotd_notify.title = title;
498 ba97b2d7 2024-03-20 stsp 	gotd_notify.repos = repos;
499 ba97b2d7 2024-03-20 stsp 	gotd_notify.default_sender = default_sender;
500 ba97b2d7 2024-03-20 stsp 	gotd_notify.pid = getpid();
501 ba97b2d7 2024-03-20 stsp 
502 ba97b2d7 2024-03-20 stsp 	signal_set(&evsigint, SIGINT, gotd_notify_sighdlr, NULL);
503 ba97b2d7 2024-03-20 stsp 	signal_set(&evsigterm, SIGTERM, gotd_notify_sighdlr, NULL);
504 ba97b2d7 2024-03-20 stsp 	signal_set(&evsighup, SIGHUP, gotd_notify_sighdlr, NULL);
505 ba97b2d7 2024-03-20 stsp 	signal_set(&evsigusr1, SIGUSR1, gotd_notify_sighdlr, NULL);
506 ba97b2d7 2024-03-20 stsp 	signal(SIGPIPE, SIG_IGN);
507 ba97b2d7 2024-03-20 stsp 
508 ba97b2d7 2024-03-20 stsp 	signal_add(&evsigint, NULL);
509 ba97b2d7 2024-03-20 stsp 	signal_add(&evsigterm, NULL);
510 ba97b2d7 2024-03-20 stsp 	signal_add(&evsighup, NULL);
511 ba97b2d7 2024-03-20 stsp 	signal_add(&evsigusr1, NULL);
512 ba97b2d7 2024-03-20 stsp 
513 ba97b2d7 2024-03-20 stsp 	imsg_init(&gotd_notify.parent_iev.ibuf, GOTD_FILENO_MSG_PIPE);
514 ba97b2d7 2024-03-20 stsp 	gotd_notify.parent_iev.handler = notify_dispatch;
515 ba97b2d7 2024-03-20 stsp 	gotd_notify.parent_iev.events = EV_READ;
516 ba97b2d7 2024-03-20 stsp 	gotd_notify.parent_iev.handler_arg = NULL;
517 ba97b2d7 2024-03-20 stsp 	event_set(&gotd_notify.parent_iev.ev, gotd_notify.parent_iev.ibuf.fd,
518 ba97b2d7 2024-03-20 stsp 	    EV_READ, notify_dispatch, &gotd_notify.parent_iev);
519 ba97b2d7 2024-03-20 stsp 	gotd_imsg_event_add(&gotd_notify.parent_iev);
520 ba97b2d7 2024-03-20 stsp 
521 ba97b2d7 2024-03-20 stsp 	event_dispatch();
522 ba97b2d7 2024-03-20 stsp 
523 ba97b2d7 2024-03-20 stsp 	if (err)
524 ba97b2d7 2024-03-20 stsp 		log_warnx("%s: %s", title, err->msg);
525 ba97b2d7 2024-03-20 stsp 	gotd_notify_shutdown();
526 ba97b2d7 2024-03-20 stsp }
527 ba97b2d7 2024-03-20 stsp 
528 ba97b2d7 2024-03-20 stsp void
529 ba97b2d7 2024-03-20 stsp gotd_notify_shutdown(void)
530 ba97b2d7 2024-03-20 stsp {
531 e8d451cc 2024-03-22 stsp 	log_debug("%s: shutting down", gotd_notify.title);
532 ba97b2d7 2024-03-20 stsp 	exit(0);
533 ba97b2d7 2024-03-20 stsp }