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#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <assert.h>
#include <stdlib.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "socket-client.h"
#include "util.h"
struct socket_client {
struct pa_mainloop_api *mainloop;
int fd;
void *io_source, *fixed_source;
void (*callback)(struct socket_client*c, struct iochannel *io, void *userdata);
void *userdata;
};
static struct socket_client*socket_client_new(struct pa_mainloop_api *m) {
struct socket_client *c;
assert(m);
c = malloc(sizeof(struct socket_client));
assert(c);
c->mainloop = m;
c->fd = -1;
c->io_source = c->fixed_source = NULL;
c->callback = NULL;
c->userdata = NULL;
return c;
}
static void do_call(struct socket_client *c) {
struct iochannel *io;
int error, lerror;
assert(c && c->callback);
lerror = sizeof(error);
if (getsockopt(c->fd, SOL_SOCKET, SO_ERROR, &error, &lerror) < 0) {
fprintf(stderr, "getsockopt(): %s\n", strerror(errno));
goto failed;
}
if (lerror != sizeof(error)) {
fprintf(stderr, "getsocktop() returned invalid size.\n");
goto failed;
}
if (error != 0) {
fprintf(stderr, "connect(): %s\n", strerror(error));
goto failed;
}
io = iochannel_new(c->mainloop, c->fd, c->fd);
assert(io);
c->fd = -1;
c->callback(c, io, c->userdata);
return;
failed:
close(c->fd);
c->fd = -1;
c->callback(c, NULL, c->userdata);
return;
}
static void connect_fixed_cb(struct pa_mainloop_api *m, void *id, void *userdata) {
struct socket_client *c = userdata;
assert(m && c && c->fixed_source == id);
m->cancel_fixed(m, c->fixed_source);
c->fixed_source = NULL;
do_call(c);
}
static void connect_io_cb(struct pa_mainloop_api*m, void *id, int fd, enum pa_mainloop_api_io_events events, void *userdata) {
struct socket_client *c = userdata;
assert(m && c && c->io_source == id && fd >= 0 && events == PA_MAINLOOP_API_IO_EVENT_OUTPUT);
m->cancel_io(m, c->io_source);
c->io_source = NULL;
do_call(c);
}
static int do_connect(struct socket_client *c, const struct sockaddr *sa, socklen_t len) {
int r;
assert(c && sa && len);
make_nonblock_fd(c->fd);
if ((r = connect(c->fd, sa, len)) < 0) {
if (r != EINPROGRESS) {
fprintf(stderr, "connect(): %s\n", strerror(errno));
return -1;
}
c->io_source = c->mainloop->source_io(c->mainloop, c->fd, PA_MAINLOOP_API_IO_EVENT_OUTPUT, connect_io_cb, c);
assert(c->io_source);
} else {
c->fixed_source = c->mainloop->source_fixed(c->mainloop, connect_fixed_cb, c);
assert(c->io_source);
}
return 0;
}
struct socket_client* socket_client_new_ipv4(struct pa_mainloop_api *m, uint32_t address, uint16_t port) {
struct socket_client *c;
struct sockaddr_in sa;
c = socket_client_new(m);
assert(c);
if ((c->fd = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
fprintf(stderr, "socket(): %s\n", strerror(errno));
goto fail;
}
sa.sin_family = AF_INET;
sa.sin_port = htons(port);
sa.sin_addr.s_addr = htonl(address);
if (do_connect(c, (struct sockaddr*) &sa, sizeof(sa)) < 0)
goto fail;
return c;
fail:
socket_client_free(c);
return NULL;
}
struct socket_client* socket_client_new_unix(struct pa_mainloop_api *m, const char *filename) {
struct socket_client *c;
struct sockaddr_un sa;
c = socket_client_new(m);
assert(c);
if ((c->fd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0) {
fprintf(stderr, "socket(): %s\n", strerror(errno));
goto fail;
}
sa.sun_family = AF_LOCAL;
strncpy(sa.sun_path, filename, sizeof(sa.sun_path)-1);
sa.sun_path[sizeof(sa.sun_path) - 1] = 0;
if (do_connect(c, (struct sockaddr*) &sa, sizeof(sa)) < 0)
goto fail;
return c;
fail:
socket_client_free(c);
return NULL;
}
void socket_client_free(struct socket_client *c) {
assert(c && c->mainloop);
if (c->io_source)
c->mainloop->cancel_io(c->mainloop, c->io_source);
if (c->fixed_source)
c->mainloop->cancel_fixed(c->mainloop, c->fixed_source);
if (c->fd >= 0)
close(c->fd);
free(c);
}
void socket_client_set_callback(struct socket_client *c, void (*on_connection)(struct socket_client *c, struct iochannel*io, void *userdata), void *userdata) {
assert(c);
c->callback = on_connection;
c->userdata = userdata;
}
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