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authorLennart Poettering <lennart@poettering.net>2006-06-19 21:53:48 +0000
committerLennart Poettering <lennart@poettering.net>2006-06-19 21:53:48 +0000
commitf44ba092651aa75055e109e04b4164ea92ae7fdc (patch)
tree5dfe076191b32946e78edf64d584d0a65f320013 /src/pulsecore/iochannel.c
parentdd21f11deda64e65a6f75817496534c2c9dda1a8 (diff)
big s/polyp/pulse/g
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1033 fefdeb5f-60dc-0310-8127-8f9354f1896f
Diffstat (limited to 'src/pulsecore/iochannel.c')
-rw-r--r--src/pulsecore/iochannel.c417
1 files changed, 417 insertions, 0 deletions
diff --git a/src/pulsecore/iochannel.c b/src/pulsecore/iochannel.c
new file mode 100644
index 00000000..8a19094a
--- /dev/null
+++ b/src/pulsecore/iochannel.c
@@ -0,0 +1,417 @@
+/* $Id$ */
+
+/***
+ This file is part of PulseAudio.
+
+ PulseAudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ PulseAudio is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with PulseAudio; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_SYS_UN_H
+#include <sys/un.h>
+#endif
+
+#include "winsock.h"
+
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/core-error.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/socket-util.h>
+#include <pulsecore/log.h>
+
+#include "iochannel.h"
+
+struct pa_iochannel {
+ int ifd, ofd;
+ pa_mainloop_api* mainloop;
+
+ pa_iochannel_cb_t callback;
+ void*userdata;
+
+ int readable;
+ int writable;
+ int hungup;
+
+ int no_close;
+
+ pa_io_event* input_event, *output_event;
+};
+
+static void enable_mainloop_sources(pa_iochannel *io) {
+ assert(io);
+
+ if (io->input_event == io->output_event && io->input_event) {
+ pa_io_event_flags_t f = PA_IO_EVENT_NULL;
+ assert(io->input_event);
+
+ if (!io->readable)
+ f |= PA_IO_EVENT_INPUT;
+ if (!io->writable)
+ f |= PA_IO_EVENT_OUTPUT;
+
+ io->mainloop->io_enable(io->input_event, f);
+ } else {
+ if (io->input_event)
+ io->mainloop->io_enable(io->input_event, io->readable ? PA_IO_EVENT_NULL : PA_IO_EVENT_INPUT);
+ if (io->output_event)
+ io->mainloop->io_enable(io->output_event, io->writable ? PA_IO_EVENT_NULL : PA_IO_EVENT_OUTPUT);
+ }
+}
+
+static void callback(pa_mainloop_api* m, pa_io_event *e, int fd, pa_io_event_flags_t f, void *userdata) {
+ pa_iochannel *io = userdata;
+ int changed = 0;
+
+ assert(m);
+ assert(e);
+ assert(fd >= 0);
+ assert(userdata);
+
+ if ((f & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR)) && !io->hungup) {
+ io->hungup = 1;
+ changed = 1;
+ }
+
+ if ((f & PA_IO_EVENT_INPUT) && !io->readable) {
+ io->readable = 1;
+ changed = 1;
+ assert(e == io->input_event);
+ }
+
+ if ((f & PA_IO_EVENT_OUTPUT) && !io->writable) {
+ io->writable = 1;
+ changed = 1;
+ assert(e == io->output_event);
+ }
+
+ if (changed) {
+ enable_mainloop_sources(io);
+
+ if (io->callback)
+ io->callback(io, io->userdata);
+ }
+}
+
+pa_iochannel* pa_iochannel_new(pa_mainloop_api*m, int ifd, int ofd) {
+ pa_iochannel *io;
+
+ assert(m);
+ assert(ifd >= 0 || ofd >= 0);
+
+ io = pa_xnew(pa_iochannel, 1);
+ io->ifd = ifd;
+ io->ofd = ofd;
+ io->mainloop = m;
+
+ io->userdata = NULL;
+ io->callback = NULL;
+ io->readable = 0;
+ io->writable = 0;
+ io->hungup = 0;
+ io->no_close = 0;
+
+ io->input_event = io->output_event = NULL;
+
+ if (ifd == ofd) {
+ assert(ifd >= 0);
+ pa_make_nonblock_fd(io->ifd);
+ io->input_event = io->output_event = m->io_new(m, ifd, PA_IO_EVENT_INPUT|PA_IO_EVENT_OUTPUT, callback, io);
+ } else {
+
+ if (ifd >= 0) {
+ pa_make_nonblock_fd(io->ifd);
+ io->input_event = m->io_new(m, ifd, PA_IO_EVENT_INPUT, callback, io);
+ }
+
+ if (ofd >= 0) {
+ pa_make_nonblock_fd(io->ofd);
+ io->output_event = m->io_new(m, ofd, PA_IO_EVENT_OUTPUT, callback, io);
+ }
+ }
+
+ return io;
+}
+
+void pa_iochannel_free(pa_iochannel*io) {
+ assert(io);
+
+ if (io->input_event)
+ io->mainloop->io_free(io->input_event);
+
+ if (io->output_event && (io->output_event != io->input_event))
+ io->mainloop->io_free(io->output_event);
+
+ if (!io->no_close) {
+ if (io->ifd >= 0)
+
+ close(io->ifd);
+ if (io->ofd >= 0 && io->ofd != io->ifd)
+ close(io->ofd);
+ }
+
+ pa_xfree(io);
+}
+
+int pa_iochannel_is_readable(pa_iochannel*io) {
+ assert(io);
+
+ return io->readable || io->hungup;
+}
+
+int pa_iochannel_is_writable(pa_iochannel*io) {
+ assert(io);
+
+ return io->writable && !io->hungup;
+}
+
+int pa_iochannel_is_hungup(pa_iochannel*io) {
+ assert(io);
+
+ return io->hungup;
+}
+
+ssize_t pa_iochannel_write(pa_iochannel*io, const void*data, size_t l) {
+ ssize_t r;
+
+ assert(io);
+ assert(data);
+ assert(l);
+ assert(io->ofd >= 0);
+
+ r = pa_write(io->ofd, data, l);
+ if (r >= 0) {
+ io->writable = 0;
+ enable_mainloop_sources(io);
+ }
+
+ return r;
+}
+
+ssize_t pa_iochannel_read(pa_iochannel*io, void*data, size_t l) {
+ ssize_t r;
+
+ assert(io);
+ assert(data);
+ assert(io->ifd >= 0);
+
+ r = pa_read(io->ifd, data, l);
+ if (r >= 0) {
+ io->readable = 0;
+ enable_mainloop_sources(io);
+ }
+
+ return r;
+}
+
+#ifdef SCM_CREDENTIALS
+
+int pa_iochannel_creds_supported(pa_iochannel *io) {
+ struct sockaddr_un sa;
+ socklen_t l;
+
+ assert(io);
+ assert(io->ifd >= 0);
+ assert(io->ofd == io->ifd);
+
+ l = sizeof(sa);
+
+ if (getsockname(io->ifd, (struct sockaddr*) &sa, &l) < 0)
+ return 0;
+
+ return sa.sun_family == AF_UNIX;
+}
+
+int pa_iochannel_creds_enable(pa_iochannel *io) {
+ int t = 1;
+
+ assert(io);
+ assert(io->ifd >= 0);
+
+ if (setsockopt(io->ifd, SOL_SOCKET, SO_PASSCRED, &t, sizeof(t)) < 0) {
+ pa_log_error("setsockopt(SOL_SOCKET, SO_PASSCRED): %s", pa_cstrerror(errno));
+ return -1;
+ }
+
+ return 0;
+}
+
+ssize_t pa_iochannel_write_with_creds(pa_iochannel*io, const void*data, size_t l) {
+ ssize_t r;
+ struct msghdr mh;
+ struct iovec iov;
+ uint8_t cmsg_data[CMSG_SPACE(sizeof(struct ucred))];
+ struct ucred *ucred;
+ struct cmsghdr *cmsg;
+
+ assert(io);
+ assert(data);
+ assert(l);
+ assert(io->ofd >= 0);
+
+ memset(&iov, 0, sizeof(iov));
+ iov.iov_base = (void*) data;
+ iov.iov_len = l;
+
+ memset(cmsg_data, 0, sizeof(cmsg_data));
+ cmsg = (struct cmsghdr*) cmsg_data;
+ cmsg->cmsg_len = CMSG_LEN(sizeof(struct ucred));
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_CREDENTIALS;
+
+ ucred = (struct ucred*) CMSG_DATA(cmsg);
+ ucred->pid = getpid();
+ ucred->uid = getuid();
+ ucred->gid = getgid();
+
+ memset(&mh, 0, sizeof(mh));
+ mh.msg_name = NULL;
+ mh.msg_namelen = 0;
+ mh.msg_iov = &iov;
+ mh.msg_iovlen = 1;
+ mh.msg_control = cmsg_data;
+ mh.msg_controllen = sizeof(cmsg_data);
+ mh.msg_flags = 0;
+
+ if ((r = sendmsg(io->ofd, &mh, MSG_NOSIGNAL)) >= 0) {
+ io->writable = 0;
+ enable_mainloop_sources(io);
+ }
+
+ return r;
+}
+
+ssize_t pa_iochannel_read_with_creds(pa_iochannel*io, void*data, size_t l, struct ucred *ucred, int *creds_valid) {
+ ssize_t r;
+ struct msghdr mh;
+ struct iovec iov;
+ uint8_t cmsg_data[CMSG_SPACE(sizeof(struct ucred))];
+
+ assert(io);
+ assert(data);
+ assert(l);
+ assert(io->ifd >= 0);
+ assert(ucred);
+ assert(creds_valid);
+
+ memset(&iov, 0, sizeof(iov));
+ iov.iov_base = data;
+ iov.iov_len = l;
+
+ memset(cmsg_data, 0, sizeof(cmsg_data));
+
+ memset(&mh, 0, sizeof(mh));
+ mh.msg_name = NULL;
+ mh.msg_namelen = 0;
+ mh.msg_iov = &iov;
+ mh.msg_iovlen = 1;
+ mh.msg_control = cmsg_data;
+ mh.msg_controllen = sizeof(cmsg_data);
+ mh.msg_flags = 0;
+
+ if ((r = recvmsg(io->ifd, &mh, MSG_NOSIGNAL)) >= 0) {
+ struct cmsghdr *cmsg;
+
+ *creds_valid = 0;
+
+ for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {
+
+ if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_CREDENTIALS) {
+ assert(cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred)));
+ memcpy(ucred, CMSG_DATA(cmsg), sizeof(struct ucred));
+ *creds_valid = 1;
+ break;
+ }
+ }
+
+ io->readable = 0;
+ enable_mainloop_sources(io);
+ }
+
+ return r;
+}
+#else /* SCM_CREDENTIALS */
+
+int pa_iochannel_creds_supported(pa_iochannel *io) {
+ return 0;
+}
+
+int pa_iochannel_creds_enable(pa_iochannel *io) {
+ return -1;
+}
+
+ssize_t pa_iochannel_write_with_creds(pa_iochannel*io, const void*data, size_t l) {
+ pa_log_error("pa_iochannel_write_with_creds() not supported.");
+ return -1;
+}
+
+ssize_t pa_iochannel_read_with_creds(pa_iochannel*io, void*data, size_t l, struct ucred *ucred, int *creds_valid) {
+ pa_log_error("pa_iochannel_read_with_creds() not supported.");
+ return -1;
+}
+
+#endif /* SCM_CREDENTIALS */
+
+void pa_iochannel_set_callback(pa_iochannel*io, pa_iochannel_cb_t _callback, void *userdata) {
+ assert(io);
+
+ io->callback = _callback;
+ io->userdata = userdata;
+}
+
+void pa_iochannel_set_noclose(pa_iochannel*io, int b) {
+ assert(io);
+
+ io->no_close = b;
+}
+
+void pa_iochannel_socket_peer_to_string(pa_iochannel*io, char*s, size_t l) {
+ assert(io);
+ assert(s);
+ assert(l);
+
+ pa_socket_peer_to_string(io->ifd, s, l);
+}
+
+int pa_iochannel_socket_set_rcvbuf(pa_iochannel *io, size_t l) {
+ assert(io);
+
+ return pa_socket_set_rcvbuf(io->ifd, l);
+}
+
+int pa_iochannel_socket_set_sndbuf(pa_iochannel *io, size_t l) {
+ assert(io);
+
+ return pa_socket_set_sndbuf(io->ofd, l);
+}
+
+pa_mainloop_api* pa_iochannel_get_mainloop_api(pa_iochannel *io) {
+ assert(io);
+
+ return io->mainloop;
+}