2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or (at
5 * your option) any later version.
7 * This program is distributed in the hope that it will be useful, but
8 * WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
10 * General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
17 * Copyright © 2006 Pierre Habouzit
21 #include <sys/epoll.h>
22 #include <sys/socket.h>
24 # include <linux/poll.h>
26 # define EPOLLRDHUP POLLRDHUP
33 #include "mutt_ssl.li"
35 DO_ARRAY_TYPE(job_t, job);
37 static int epollfd = -1;
38 static job_array jobs;
40 static int el_job_setemode(job_t *w, el_mode emode)
42 static int const evtmode_to_epoll[] = {
43 [EL_NEW] = EPOLLRDHUP,
44 [EL_READING] = EPOLLIN,
45 [EL_WRITING] = EPOLLOUT,
46 [EL_RDWR] = EPOLLIN | EPOLLOUT,
47 [EL_IDLE] = EPOLLRDHUP,
50 assert (w->mode == emode || emode == EL_WRITING || emode == EL_READING);
52 if (emode != w->emode) {
53 struct epoll_event event = {
55 .events = evtmode_to_epoll[emode],
57 int action = w->emode == EL_NEW ? EPOLL_CTL_ADD : EPOLL_CTL_MOD;
58 if (epoll_ctl(epollfd, action, w->fd, &event) < 0) {
59 return el_job_release(w, true);
66 int el_job_setmode(job_t *w, el_mode mode)
68 if (w->mode == w->emode) {
70 return el_job_setemode(w, mode);
77 void job_wipe(job_t *w)
80 gnutls_certificate_free_credentials(w->xcred);
82 gnutls_deinit(w->session);
85 static void job_arrau_dtor(job_t **j)
88 IGNORE(el_job_release(*j, EL_KILLED));
91 DO_ARRAY_FUNCS(job_t, job, job_arrau_dtor);
93 static void job_array_remove(job_array *arr, job_t *j)
95 for (int i = 0; i < arr->len; i++) {
96 if (arr->arr[i] == j) {
97 job_array_take(arr, i);
103 job_t *el_job_start(const machine_t *m, void *cfg)
105 job_t *w = job_new();
107 job_array_append(&jobs, w);
108 return m->setup(w, cfg) < 0 ? NULL : w;
111 int el_job_release(job_t *w, el_status reason)
113 w->state = EL_LLP_FINI;
114 if (w->m && w->m->finalize) {
115 w->m->finalize(w, reason);
119 gnutls_bye(w->session, GNUTLS_SHUT_RDWR);
122 job_array_remove(&jobs, w);
127 static int el_job_tlsing(job_t *w, int starttls)
129 int err = gnutls_handshake(w->session);
130 if (err < 0 && !gnutls_error_is_fatal(err)) {
131 int wr = gnutls_record_get_direction(w->session);
132 return el_job_setemode(w, wr ? EL_WRITING : EL_READING);
135 return el_job_release(w, EL_RDHUP);
138 if (!tls_check_certificate (conn))
142 /* set Security Strength Factor (SSF) for SASL */
143 /* NB: gnutls_cipher_get_key_size() returns key length in bytes */
144 w->ssf = gnutls_cipher_get_key_size(gnutls_cipher_get(w->session)) * 8;
145 w->state = EL_LLP_READY;
147 return el_job_setemode(w, w->mode);
148 return w->m->on_event(w, EL_EVT_RUNNING);
151 static int el_job_starttlsing(job_t *w)
153 return el_job_tlsing(w, true);
156 static int el_job_connecting_ssl(job_t *w)
158 return el_job_tlsing(w, false);
161 static int el_job_connecting(job_t *w)
164 socklen_t len = sizeof(err);
166 if (getsockopt(w->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &len) || err)
167 return el_job_release(w, EL_ERROR);
170 w->llp = &el_job_connecting_ssl;
173 w->state = EL_LLP_READY;
174 return w->m->on_event(w, EL_EVT_RUNNING);
177 static int tls_negotiate(job_t *w)
179 static int protocol_priority[] = { GNUTLS_TLS1, GNUTLS_SSL3, 0 };
181 if (gnutls_certificate_allocate_credentials(&w->xcred) < 0)
184 /* ignore errors, maybe file doesn't exist yet */
185 gnutls_certificate_set_x509_trust_file(w->xcred, mod_ssl.cert_file,
186 GNUTLS_X509_FMT_PEM);
188 if (mod_ssl.ca_certificates_file) {
189 gnutls_certificate_set_x509_trust_file(w->xcred,
190 mod_ssl.ca_certificates_file, GNUTLS_X509_FMT_PEM);
192 gnutls_init(&w->session, GNUTLS_CLIENT);
195 gnutls_transport_set_ptr(w->session, (gnutls_transport_ptr)(intptr_t)w->fd);
197 /* disable TLS/SSL protocols as needed */
198 if (!mod_ssl.use_sslv3) {
199 protocol_priority[1] = 0;
202 /* We use default priorities (see gnutls documentation),
203 except for protocol version */
204 gnutls_set_default_priority(w->session);
205 gnutls_protocol_set_priority(w->session, protocol_priority);
206 gnutls_credentials_set(w->session, GNUTLS_CRD_CERTIFICATE, w->xcred);
210 int el_job_connect(job_t *w, struct sockaddr *addr, socklen_t len,
211 int type, int proto, int ssl)
213 int res, sock = socket(addr->sa_family, type, proto);
218 res = fcntl(sock, F_GETFL);
221 if (fcntl(sock, F_SETFL, res | O_NONBLOCK) < 0)
223 if (connect(sock, addr, len) < 0)
227 if (ssl && tls_negotiate(w) < 0)
230 w->llp = &el_job_connecting;
231 return el_job_setmode(w, EL_WRITING);
235 return el_job_release(w, EL_ERROR);
238 int el_job_starttls(job_t *w)
240 if (tls_negotiate(w) < 0)
241 return el_job_release(w, EL_RDHUP);
242 w->state = EL_LLP_INIT;
243 w->llp = &el_job_starttlsing;
247 ssize_t el_job_read(job_t *w, buffer_t *buf)
251 buffer_ensure(buf, BUFSIZ);
254 nr = gnutls_record_recv(w->session, buf->data + buf->len, BUFSIZ);
255 if (nr < 0 && !gnutls_error_is_fatal(nr)) {
256 int wr = gnutls_record_get_direction(w->session);
257 return el_job_setemode(w, wr ? EL_WRITING : EL_READING);
259 EL_JOB_CHECK(el_job_setemode(w, w->mode));
261 nr = read(w->fd, buf->data + buf->len, BUFSIZ);
262 if (nr < 0 && (errno == EINTR || errno == EAGAIN))
266 return el_job_release(w, EL_RDHUP);
267 buffer_extend(buf, nr);
271 ssize_t el_job_write(job_t *w, buffer_t *buf)
279 nr = gnutls_record_send(w->session, buf->data, buf->len);
280 if (nr < 0 && !gnutls_error_is_fatal(nr)) {
281 int wr = gnutls_record_get_direction(w->session);
282 return el_job_setemode(w, wr ? EL_WRITING : EL_READING);
284 EL_JOB_CHECK(el_job_setemode(w, w->mode));
286 nr = write(w->fd, buf->data, buf->len);
287 if (nr < 0 && (errno == EINTR || errno == EAGAIN))
291 return el_job_release(w, EL_RDHUP);
292 buffer_splice(buf, 0, nr, NULL, 0);
296 int el_dispatch(int timeout)
298 struct epoll_event events[FD_SETSIZE];
299 int count = epoll_wait(epollfd, events, countof(events), timeout);
302 if (errno == EAGAIN || errno == EINTR)
304 mutt_error("epoll_wait");
305 mutt_exit(EXIT_FAILURE);
308 while (--count >= 0) {
309 job_t *w = events[count].data.ptr;
310 int event = events[count].events;
313 gettimeofday(&w->mru, NULL);
320 if (event & EPOLLRDHUP) {
321 IGNORE(el_job_release(w, EL_RDHUP));
322 } else if (w->mode != w->emode) {
323 IGNORE(w->m->on_event(w, EL_EVT_INOUT ^ w->emode));
327 if (event & EPOLLOUT)
329 IGNORE(w->m->on_event(w, evt));
334 IGNORE(el_job_release(w, EL_ERROR));
342 void *el_loop(void *data)
344 time_t sec = time(NULL);
350 pthread_testcancel();
352 gettimeofday(&now, NULL);
353 if (sec >= now.tv_sec)
357 for (int i = jobs.len - 1; i >= 0; --i) {
358 job_t *w = jobs.arr[i];
359 if (timercmp(&now, &w->mru, >))
360 IGNORE(w->m->on_event(w, EL_EVT_WAKEUP));
365 void el_initialize(void)
367 gnutls_global_init();
368 epollfd = epoll_create(1024);
370 mutt_error("epoll_create");
371 mutt_exit(EXIT_FAILURE);
373 job_array_init(&jobs);
376 void el_shutdown(void)
378 job_array_wipe(&jobs);
380 gnutls_global_deinit();