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#include <netinet/in.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/types.h>
#include "byte.h"
#include "ip.h"
#include "socket_if.h"
/**
@file socket_recv.c
@authors djb, fefe
@ref ucspi-tcp6
@brief setup receiving socket
*/
int socket_recv(int s, char *buf, unsigned int len, char ip[16], uint16 *port, uint32 *scope_id)
{
struct sockaddr_in6 sa;
unsigned int dummy = sizeof(sa);
int r;
byte_zero(&sa, dummy);
r = recvfrom(s, buf, len, 0, (struct sockaddr *)&sa, &dummy);
if (r == -1) return -1;
if (sa.sin6_family == AF_INET) {
struct sockaddr_in *sa4 = (struct sockaddr_in *)&sa;
byte_copy(ip, 12, V4mappedprefix);
byte_copy(ip + 12, 4, (char *)&sa4->sin_addr);
uint16_unpack_big((char *)&sa4->sin_port, port);
if (scope_id) *scope_id = 0;
} else {
byte_copy(ip, 16, (char *)&sa.sin6_addr);
uint16_unpack_big((char *)&sa.sin6_port, port);
if (scope_id) *scope_id = sa.sin6_scope_id;
}
return r;
}
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