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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_setup.c
@author djb, feh
@source ucspi-tcp6
@brief setup listening socket
*/
int socket_accept(int s, char ip[16], uint16 *port, uint32 *scope_id)
{
struct sockaddr_in6 sa;
unsigned int dummy = sizeof(sa);
int fd;
fd = accept(s, (struct sockaddr *)&sa, &dummy);
if (fd == -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 fd;
}
int socket_accept4(int s, char ip[4], uint16 *port)
{
struct sockaddr_in sa;
unsigned int dummy = sizeof(sa);
int fd;
fd = accept(s, (struct sockaddr *)&sa, &dummy);
if (fd == -1) return -1;
byte_copy(ip, 4, (char *)&sa.sin_addr);
uint16_unpack_big((char *)&sa.sin_port, port);
return fd;
}
int socket_listen(int s, int backlog)
{
return listen(s, backlog);
}
int socket_ipoptionskill(int s)
{
int r;
r = setsockopt(s, IPPROTO_IP, 1, (char *)0, 0); /* 1 == IP_OPTIONS */
r = setsockopt(s, IPPROTO_IPV6, 1, (char *)0, 0);
return r;
}
int socket_ip6anycast(int s)
{
int opt = 1;
int r;
#ifdef GEN_IP_PKTINFO /* Linux */
r = setsockopt(s, IPPROTO_IP, GEN_IP_PKTINFO, &opt, sizeof(opt));
#elif IP_PKTINFO /* Solaris */
r = setsockopt(s, IPPROTO_IP, IP_PKTINFO, &opt, sizeof(opt));
#elif IP_RECVDSTADDR /* BSD */
r = setsockopt(s, IPPROTO_IP, IP_RECVDSTADDR, &opt, sizeof(opt));
#elif IPV6_RECVDSTADDR
r = setsockopt(s, IPPROTO_IPV6, IP_RECVDSTADDR, &opt, sizeof(opt));
#endif
return r;
}
int socket_dualstack(int s)
{
int opt = 0;
return setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &opt, sizeof(opt));
}
int socket_nodualstack(int s)
{
int opt = 1;
return setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &opt, sizeof(opt));
}
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