actube/src/cw/sock_receive.c

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/*
This file is part of actube.
actube is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
libcapwap 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 General Public License
along with Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file
* @brief Implementation of sock_receive
*/
#include <errno.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include "sock.h"
/**
* Receive data from a socket
* @param sock the socket
* @param buf destination buffer
* @param len length of destination buffer
* @srcaddr receives the source address
* @srcaddrlen receives the length of the source address
* @return the number of bytes read oder -1 if an error has occured.
*
* If the return value is -1, errno is set to the appropriate error
*/
int sock_receive(int sock, void *buf, size_t len, int flags,
struct sockaddr *srcaddr, socklen_t * srcaddrlen)
{
int n;
/* socklen_t al = sizeof(struct sockaddr_storage); */
*srcaddrlen=sizeof(struct sockaddr);
memset(srcaddr, 0, sizeof(struct sockaddr));
while ((n = recvfrom(sock, (char *) buf, len, flags, srcaddr, srcaddrlen)) < 0) {
if (errno != EINTR)
return n;
}
return n;
}