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/*
* Original author : tridge@samba.org, January 2002
*
* Copyright (c) 2005 Christophe Varoqui
* Copyright (c) 2005 Alasdair Kergon, Redhat
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdarg.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/poll.h>
#include <signal.h>
#include <errno.h>
#include "memory.h"
#include "uxsock.h"
/*
* connect to a unix domain socket
*/
int ux_socket_connect(const char *name)
{
int fd;
struct sockaddr_un addr;
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
strncpy(addr.sun_path, name, sizeof(addr.sun_path));
fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (fd == -1) {
return -1;
}
if (connect(fd, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
close(fd);
return -1;
}
return fd;
}
/*
* create a unix domain socket and start listening on it
* return a file descriptor open on the socket
*/
int ux_socket_listen(const char *name)
{
int fd;
struct sockaddr_un addr;
/* get rid of any old socket */
unlink(name);
fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (fd == -1) return -1;
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
strncpy(addr.sun_path, name, sizeof(addr.sun_path));
if (bind(fd, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
close(fd);
return -1;
}
if (listen(fd, 10) == -1) {
close(fd);
return -1;
}
return fd;
}
/*
* keep writing until it's all sent
*/
size_t write_all(int fd, const void *buf, size_t len)
{
size_t total = 0;
while (len) {
ssize_t n = write(fd, buf, len);
if (n < 0) {
if ((errno == EINTR) || (errno == EAGAIN))
continue;
return total;
}
if (!n)
return total;
buf = n + (char *)buf;
len -= n;
total += n;
}
return total;
}
/*
* keep reading until its all read
*/
size_t read_all(int fd, void *buf, size_t len)
{
size_t total = 0;
while (len) {
ssize_t n = read(fd, buf, len);
if (n < 0) {
if ((errno == EINTR) || (errno == EAGAIN))
continue;
return total;
}
if (!n)
return total;
buf = n + (char *)buf;
len -= n;
total += n;
}
return total;
}
/*
* send a packet in length prefix format
*/
int send_packet(int fd, const char *buf, size_t len)
{
int ret = 0;
sigset_t set, old;
/* Block SIGPIPE */
sigemptyset(&set);
sigaddset(&set, SIGPIPE);
pthread_sigmask(SIG_BLOCK, &set, &old);
if (write_all(fd, &len, sizeof(len)) != sizeof(len))
ret = -1;
if (!ret && write_all(fd, buf, len) != len)
ret = -1;
/* And unblock it again */
pthread_sigmask(SIG_SETMASK, &old, NULL);
return ret;
}
/*
* receive a packet in length prefix format
*/
int recv_packet(int fd, char **buf, size_t *len)
{
if (read_all(fd, len, sizeof(*len)) != sizeof(*len)) return -1;
(*buf) = MALLOC(*len);
if (!*buf)
return -1;
if (read_all(fd, *buf, *len) != *len) {
FREE(*buf);
return -1;
}
return 0;
}
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