mirror of https://github.com/0intro/wmii
82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
/*
|
|
* (C)opyright MMIV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
|
|
* See LICENSE file for license details.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/un.h>
|
|
#include <unistd.h>
|
|
|
|
#include "ixp.h"
|
|
|
|
#include <cext.h>
|
|
|
|
unsigned int
|
|
ixp_send_message(int fd, void *msg, unsigned int msize, char **errstr)
|
|
{
|
|
unsigned int num = 0;
|
|
int r;
|
|
|
|
/* send message */
|
|
while(num < msize) {
|
|
r = write(fd, msg + num, msize - num);
|
|
if(r == -1 && errno == EINTR)
|
|
continue;
|
|
if(r < 1) {
|
|
*errstr = "broken pipe";
|
|
return 0;
|
|
}
|
|
num += r;
|
|
}
|
|
return num;
|
|
}
|
|
|
|
static unsigned int
|
|
ixp_recv_data(int fd, void *msg, unsigned int msize, char **errstr)
|
|
{
|
|
unsigned int num = 0;
|
|
int r = 0;
|
|
|
|
/* receive data */
|
|
while(num < msize) {
|
|
r = read(fd, msg + num, msize - num);
|
|
if(r == -1 && errno == EINTR)
|
|
continue;
|
|
if(r < 1) {
|
|
*errstr = "broken pipe";
|
|
return 0;
|
|
}
|
|
num += r;
|
|
}
|
|
return num;
|
|
}
|
|
|
|
unsigned int
|
|
ixp_recv_message(int fd, void *msg, unsigned int msglen, char **errstr)
|
|
{
|
|
unsigned int msize;
|
|
|
|
/* receive header */
|
|
if(ixp_recv_data(fd, msg, sizeof(unsigned int), errstr) !=
|
|
sizeof(unsigned int))
|
|
return 0;
|
|
ixp_dec_u32(msg, &msize);
|
|
if(msize > msglen) {
|
|
*errstr = "invalid message header";
|
|
return 0;
|
|
}
|
|
/* receive message */
|
|
if(ixp_recv_data
|
|
(fd, msg + sizeof(unsigned int), msize - sizeof(unsigned int),
|
|
errstr)
|
|
!= msize - sizeof(unsigned int))
|
|
return 0;
|
|
return msize;
|
|
}
|