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/*
20131117
Jan Mojzis
Public domain.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include "e.h"
#include "byte.h"
#include "xsocket.h"
static int xsocket_bind6(int fd, const unsigned char *ip, const unsigned char *port, long long id) {
#ifdef HASIPV6
struct sockaddr_in6 sa;
if (byte_isequal("\0\0\0\0\0\0\0\0\0\0\377\377", 12, ip)) { errno = EPROTO; return -1; }
byte_zero(&sa, sizeof sa);
sa.sin6_family = PF_INET6;
byte_copy(&sa.sin6_addr, 16, ip);
byte_copy(&sa.sin6_port, 2, port);
sa.sin6_scope_id = id;
return bind(fd, (struct sockaddr *)&sa, sizeof sa);
#else
errno = EPROTONOSUPPORT;
return -1;
#endif
}
static int xsocket_bind4(int fd, const unsigned char *ip, const unsigned char *port, long long id) {
struct sockaddr_in sa;
if (!byte_isequal("\0\0\0\0\0\0\0\0\0\0\377\377", 12, ip)) { errno = EPROTO; return -1; }
byte_zero(&sa, sizeof sa);
sa.sin_family = PF_INET;
byte_copy(&sa.sin_addr, 4, ip + 12);
byte_copy(&sa.sin_port, 2, port);
return bind(fd, (struct sockaddr *)&sa, sizeof sa);
}
int xsocket_bind(int fd, int type, const unsigned char *ip, const unsigned char *port, long long id) {
if (type == XSOCKET_V4) {
return xsocket_bind4(fd, ip, port, id);
}
if (type == XSOCKET_V6) {
return xsocket_bind6(fd, ip, port, id);
}
errno = EPROTO;
return -1;
}
int xsocket_bind_reuse(int fd, int type, const unsigned char *ip, const unsigned char *port, long long id) {
int opt = 1;
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof opt);
return xsocket_bind(fd, type, ip, port, id);
}
void xsocket_tryreservein(int fd, int size) {
while (size >= 1024) {
if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &size, sizeof size) == 0) return;
size -= (size >> 5);
}
}
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