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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_bind.c
* @author djb, fefe, feh
* @ref qmail, djbdns, ucspi-tcp6
* @brief binding a socket to a local resource
*/
int socket_bind4(int s,const char ip[4],uint16 port)
{
struct sockaddr_in sa;
byte_zero(&sa,sizeof(sa));
sa.sin_family = AF_INET;
uint16_pack_big((char *)&sa.sin_port,port);
byte_copy((char *)&sa.sin_addr,4,ip);
return bind(s,(struct sockaddr *)&sa,sizeof(sa));
}
int socket_bind4_reuse(int s,const char ip[4],uint16 port)
{
int opt = 1;
setsockopt(s,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));
return socket_bind4(s,ip,port);
}
/* seems not to be used here -- djbdns requires it */
void socket_tryreservein(int s,int size)
{
while (size >= 1024) {
if (setsockopt(s,SOL_SOCKET,SO_RCVBUF,&size,sizeof(size)) == 0) return;
size -= (size >> 5);
}
}
int socket_bind6(int s,const char ip[16],uint16 port,uint32 scope_id)
{
struct sockaddr_in6 sa;
byte_zero(&sa,sizeof(sa));
sa.sin6_family = AF_INET6;
uint16_pack_big((char *)&sa.sin6_port,port);
/* implicit: sa.sin6_flowinfo = 0; */
byte_copy((char *)&sa.sin6_addr,16,ip);
sa.sin6_scope_id = scope_id;
return bind(s,(struct sockaddr *)&sa,sizeof(sa));
}
int socket_bind6_reuse(int s,const char ip[16],uint16 port,uint32 scope_id)
{
int opt = 1;
setsockopt(s,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));
return socket_bind6(s,ip,port,scope_id);
}
int socket_bind(int s,const char ip[16],uint16 port,uint32 scope_id)
{
if (ip6_isv4mapped(ip))
return socket_bind4(s,ip + 12,port);
return socket_bind6(s,ip,port,scope_id);
}
int socket_bind_reuse(int s,const char ip[16],uint16 port,uint32 scope_id)
{
if (ip6_isv4mapped(ip))
return socket_bind4_reuse(s,ip + 12,port);
return socket_bind6_reuse(s,ip,port,scope_id);
}
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