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/* $Id$ */
/***
This file is part of polypaudio.
polypaudio 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 of the License,
or (at your option) any later version.
polypaudio 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
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with polypaudio; 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 <stdarg.h>
#include <stdlib.h>
#include <signal.h>
#include <errno.h>
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <fcntl.h>
#include <unistd.h>
#include <netinet/in_systm.h>
#include <netinet/tcp.h>
#include <netinet/ip.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <netdb.h>
#include "socket-util.h"
#include "util.h"
#include "xmalloc.h"
#include "log.h"
void pa_socket_peer_to_string(int fd, char *c, size_t l) {
struct stat st;
assert(c && l && fd >= 0);
if (fstat(fd, &st) < 0) {
snprintf(c, l, "Invalid client fd");
return;
}
if (S_ISSOCK(st.st_mode)) {
union {
struct sockaddr sa;
struct sockaddr_in in;
struct sockaddr_un un;
} sa;
socklen_t sa_len = sizeof(sa);
if (getpeername(fd, &sa.sa, &sa_len) >= 0) {
if (sa.sa.sa_family == AF_INET) {
uint32_t ip = ntohl(sa.in.sin_addr.s_addr);
snprintf(c, l, "TCP/IP client from %i.%i.%i.%i:%u",
ip >> 24,
(ip >> 16) & 0xFF,
(ip >> 8) & 0xFF,
ip & 0xFF,
ntohs(sa.in.sin_port));
return;
} else if (sa.sa.sa_family == AF_LOCAL) {
snprintf(c, l, "UNIX socket client");
return;
}
}
snprintf(c, l, "Unknown network client");
return;
} else if (S_ISCHR(st.st_mode) && (fd == 0 || fd == 1)) {
snprintf(c, l, "STDIN/STDOUT client");
return;
}
snprintf(c, l, "Unknown client");
}
int pa_socket_low_delay(int fd) {
int priority;
assert(fd >= 0);
#ifdef SO_PRIORITY
priority = 7;
if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &priority, sizeof(priority)) < 0)
return -1;
#endif
return 0;
}
int pa_socket_tcp_low_delay(int fd) {
int ret, tos, on;
assert(fd >= 0);
ret = pa_socket_low_delay(fd);
on = 1;
#if defined(SOL_TCP) || defined(IPPROTO_TCP)
#if defined(SOL_TCP)
if (setsockopt(fd, SOL_TCP, TCP_NODELAY, &on, sizeof(on)) < 0)
#else
if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)) < 0)
#endif
ret = -1;
#endif
#if defined(IPTOS_LOWDELAY) && defined(IP_TOS) && (defined(SOL_IP) || \
defined(IPPROTO_IP))
tos = IPTOS_LOWDELAY;
#ifdef SOL_IP
if (setsockopt(fd, SOL_IP, IP_TOS, &tos, sizeof(tos)) < 0)
#else
if (setsockopt(fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos)) < 0)
#endif
ret = -1;
#endif
return ret;
}
int pa_socket_set_rcvbuf(int fd, size_t l) {
assert(fd >= 0);
/* if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &l, sizeof(l)) < 0) { */
/* pa_log(__FILE__": SO_RCVBUF: %s\n", strerror(errno)); */
/* return -1; */
/* } */
return 0;
}
int pa_socket_set_sndbuf(int fd, size_t l) {
assert(fd >= 0);
/* if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &l, sizeof(l)) < 0) { */
/* pa_log(__FILE__": SO_SNDBUF: %s\n", strerror(errno)); */
/* return -1; */
/* } */
return 0;
}
int pa_unix_socket_is_stale(const char *fn) {
struct sockaddr_un sa;
int fd = -1, ret = -1;
if ((fd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0) {
pa_log(__FILE__": socket(): %s\n", strerror(errno));
goto finish;
}
sa.sun_family = AF_LOCAL;
strncpy(sa.sun_path, fn, sizeof(sa.sun_path)-1);
sa.sun_path[sizeof(sa.sun_path) - 1] = 0;
if (connect(fd, (struct sockaddr*) &sa, sizeof(sa)) < 0) {
if (errno == ECONNREFUSED)
ret = 1;
} else
ret = 0;
finish:
if (fd >= 0)
close(fd);
return ret;
}
int pa_unix_socket_remove_stale(const char *fn) {
int r;
if ((r = pa_unix_socket_is_stale(fn)) < 0)
return errno != ENOENT ? -1 : 0;
if (!r)
return 0;
/* Yes, here is a race condition. But who cares? */
if (unlink(fn) < 0)
return -1;
return 0;
}
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