4 This file is part of PulseAudio.
6 PulseAudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as
8 published by the Free Software Foundation; either version 2.1 of the
9 License, or (at your option) any later version.
11 PulseAudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with PulseAudio; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
32 #ifdef HAVE_SYS_SOCKET_H
33 #include <sys/socket.h>
41 #include <pulse/xmalloc.h>
43 #include <pulsecore/core-error.h>
44 #include <pulsecore/core-util.h>
45 #include <pulsecore/socket-util.h>
46 #include <pulsecore/log.h>
48 #include "iochannel.h"
52 pa_mainloop_api* mainloop;
54 pa_iochannel_cb_t callback;
63 pa_io_event* input_event, *output_event;
66 static void enable_mainloop_sources(pa_iochannel *io) {
69 if (io->input_event == io->output_event && io->input_event) {
70 pa_io_event_flags_t f = PA_IO_EVENT_NULL;
71 assert(io->input_event);
74 f |= PA_IO_EVENT_INPUT;
76 f |= PA_IO_EVENT_OUTPUT;
78 io->mainloop->io_enable(io->input_event, f);
81 io->mainloop->io_enable(io->input_event, io->readable ? PA_IO_EVENT_NULL : PA_IO_EVENT_INPUT);
83 io->mainloop->io_enable(io->output_event, io->writable ? PA_IO_EVENT_NULL : PA_IO_EVENT_OUTPUT);
87 static void callback(pa_mainloop_api* m, pa_io_event *e, int fd, pa_io_event_flags_t f, void *userdata) {
88 pa_iochannel *io = userdata;
96 if ((f & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR)) && !io->hungup) {
101 if ((f & PA_IO_EVENT_INPUT) && !io->readable) {
104 assert(e == io->input_event);
107 if ((f & PA_IO_EVENT_OUTPUT) && !io->writable) {
110 assert(e == io->output_event);
114 enable_mainloop_sources(io);
117 io->callback(io, io->userdata);
121 pa_iochannel* pa_iochannel_new(pa_mainloop_api*m, int ifd, int ofd) {
125 assert(ifd >= 0 || ofd >= 0);
127 io = pa_xnew(pa_iochannel, 1);
139 io->input_event = io->output_event = NULL;
143 pa_make_nonblock_fd(io->ifd);
144 io->input_event = io->output_event = m->io_new(m, ifd, PA_IO_EVENT_INPUT|PA_IO_EVENT_OUTPUT, callback, io);
148 pa_make_nonblock_fd(io->ifd);
149 io->input_event = m->io_new(m, ifd, PA_IO_EVENT_INPUT, callback, io);
153 pa_make_nonblock_fd(io->ofd);
154 io->output_event = m->io_new(m, ofd, PA_IO_EVENT_OUTPUT, callback, io);
161 void pa_iochannel_free(pa_iochannel*io) {
165 io->mainloop->io_free(io->input_event);
167 if (io->output_event && (io->output_event != io->input_event))
168 io->mainloop->io_free(io->output_event);
174 if (io->ofd >= 0 && io->ofd != io->ifd)
181 int pa_iochannel_is_readable(pa_iochannel*io) {
184 return io->readable || io->hungup;
187 int pa_iochannel_is_writable(pa_iochannel*io) {
190 return io->writable && !io->hungup;
193 int pa_iochannel_is_hungup(pa_iochannel*io) {
199 ssize_t pa_iochannel_write(pa_iochannel*io, const void*data, size_t l) {
205 assert(io->ofd >= 0);
207 r = pa_write(io->ofd, data, l);
210 enable_mainloop_sources(io);
216 ssize_t pa_iochannel_read(pa_iochannel*io, void*data, size_t l) {
221 assert(io->ifd >= 0);
223 r = pa_read(io->ifd, data, l);
226 enable_mainloop_sources(io);
232 #ifdef SCM_CREDENTIALS
234 int pa_iochannel_creds_supported(pa_iochannel *io) {
235 struct sockaddr_un sa;
239 assert(io->ifd >= 0);
240 assert(io->ofd == io->ifd);
244 if (getsockname(io->ifd, (struct sockaddr*) &sa, &l) < 0)
247 return sa.sun_family == AF_UNIX;
250 int pa_iochannel_creds_enable(pa_iochannel *io) {
254 assert(io->ifd >= 0);
256 if (setsockopt(io->ifd, SOL_SOCKET, SO_PASSCRED, &t, sizeof(t)) < 0) {
257 pa_log_error("setsockopt(SOL_SOCKET, SO_PASSCRED): %s", pa_cstrerror(errno));
264 ssize_t pa_iochannel_write_with_creds(pa_iochannel*io, const void*data, size_t l) {
268 uint8_t cmsg_data[CMSG_SPACE(sizeof(struct ucred))];
270 struct cmsghdr *cmsg;
275 assert(io->ofd >= 0);
277 memset(&iov, 0, sizeof(iov));
278 iov.iov_base = (void*) data;
281 memset(cmsg_data, 0, sizeof(cmsg_data));
282 cmsg = (struct cmsghdr*) cmsg_data;
283 cmsg->cmsg_len = CMSG_LEN(sizeof(struct ucred));
284 cmsg->cmsg_level = SOL_SOCKET;
285 cmsg->cmsg_type = SCM_CREDENTIALS;
287 ucred = (struct ucred*) CMSG_DATA(cmsg);
288 ucred->pid = getpid();
289 ucred->uid = getuid();
290 ucred->gid = getgid();
292 memset(&mh, 0, sizeof(mh));
297 mh.msg_control = cmsg_data;
298 mh.msg_controllen = sizeof(cmsg_data);
301 if ((r = sendmsg(io->ofd, &mh, MSG_NOSIGNAL)) >= 0) {
303 enable_mainloop_sources(io);
309 ssize_t pa_iochannel_read_with_creds(pa_iochannel*io, void*data, size_t l, struct ucred *ucred, int *creds_valid) {
313 uint8_t cmsg_data[CMSG_SPACE(sizeof(struct ucred))];
318 assert(io->ifd >= 0);
322 memset(&iov, 0, sizeof(iov));
326 memset(cmsg_data, 0, sizeof(cmsg_data));
328 memset(&mh, 0, sizeof(mh));
333 mh.msg_control = cmsg_data;
334 mh.msg_controllen = sizeof(cmsg_data);
337 if ((r = recvmsg(io->ifd, &mh, MSG_NOSIGNAL)) >= 0) {
338 struct cmsghdr *cmsg;
342 for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {
344 if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_CREDENTIALS) {
345 assert(cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred)));
346 memcpy(ucred, CMSG_DATA(cmsg), sizeof(struct ucred));
353 enable_mainloop_sources(io);
358 #else /* SCM_CREDENTIALS */
360 int pa_iochannel_creds_supported(pa_iochannel *io) {
364 int pa_iochannel_creds_enable(pa_iochannel *io) {
368 ssize_t pa_iochannel_write_with_creds(pa_iochannel*io, const void*data, size_t l) {
369 pa_log_error("pa_iochannel_write_with_creds() not supported.");
373 ssize_t pa_iochannel_read_with_creds(pa_iochannel*io, void*data, size_t l, struct ucred *ucred, int *creds_valid) {
374 pa_log_error("pa_iochannel_read_with_creds() not supported.");
378 #endif /* SCM_CREDENTIALS */
380 void pa_iochannel_set_callback(pa_iochannel*io, pa_iochannel_cb_t _callback, void *userdata) {
383 io->callback = _callback;
384 io->userdata = userdata;
387 void pa_iochannel_set_noclose(pa_iochannel*io, int b) {
393 void pa_iochannel_socket_peer_to_string(pa_iochannel*io, char*s, size_t l) {
398 pa_socket_peer_to_string(io->ifd, s, l);
401 int pa_iochannel_socket_set_rcvbuf(pa_iochannel *io, size_t l) {
404 return pa_socket_set_rcvbuf(io->ifd, l);
407 int pa_iochannel_socket_set_sndbuf(pa_iochannel *io, size_t l) {
410 return pa_socket_set_sndbuf(io->ofd, l);
413 pa_mainloop_api* pa_iochannel_get_mainloop_api(pa_iochannel *io) {