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#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include "byte.h"
#include "socket_if.h"
#include "ip.h"
/**
* @file socket_setup.c
* @authors djb, feh
* @ref 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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