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#include <stdbool.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>
#include "byte.h"
#include "socket.h"
#include "uint.h"
/* from libowfat */
/*
Copyright (c) 2001 Felix von Leitner.
All rights reserved.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License Version 2 as published
by the Free Software Foundation.
*/
const char V4any[4]={0,0,0,0};
const char V4loopback[4]={127,0,0,1};
const char V4mappedprefix[12]={0,0,0,0,0,0,0,0,0,0,0xff,0xff};
const char V6loopback[16]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
const char V6any[16]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
int socket_tcp6(void){
int s;
s = socket(PF_INET6, SOCK_STREAM, 0);
if(s == -1 && errno == EINVAL)
s = socket(PF_INET, SOCK_STREAM, 0);
return s;
}
int socket_tcp(void){
int s;
s = socket(PF_INET, SOCK_STREAM, 0);
if (s == -1) return -1;
return s;
}
int socket_bind6(int s, const char ip[16], u16 port, u32 scope_id){
struct sockaddr_in6 sa;
byte_zero(&sa, sizeof sa);
sa.sin6_family = AF_INET6;
u16_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], u16 port, u32 scope_id){
int opt = 1;
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof opt);
return socket_bind6(s, ip, port, scope_id);
}
int socket_listen(int s, unsigned backlog){
return listen(s, backlog);
}
int socket_accept6(int s, char ip[16], u16 *port, u32 *scope_id){
struct sockaddr_in6 sa;
unsigned 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);
u16_unpack_big((char *) &sa4->sin_port, port);
return fd;
}
byte_copy(ip, 16, (char *) &sa.sin6_addr);
u16_unpack_big((char *) &sa.sin6_port, port);
if(scope_id) *scope_id = sa.sin6_scope_id;
return fd;
}
int socket_recv6(int s, char *buf, unsigned len, char ip[16], u16 *port, u32 *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;
byte_copy(ip, 16, (char *) &sa.sin6_addr);
u16_unpack_big((char *) &sa.sin6_port, port);
if(scope_id) *scope_id = sa.sin6_scope_id;
return r;
}
int socket_bind4(int s, const char ip[4], u16 port){
struct sockaddr_in sa;
byte_zero(&sa, sizeof sa);
sa.sin_family = AF_INET;
u16_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], u16 port){
int opt = 1;
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof opt);
return socket_bind4(s, ip, port);
}
int socket_connect4(int s, const char ip[4], u16 port){
struct sockaddr_in sa;
byte_zero(&sa, sizeof sa);
sa.sin_family = AF_INET;
u16_pack_big((char *) &sa.sin_port, port);
byte_copy((char *) &sa.sin_addr, 4, ip);
return connect(s, (struct sockaddr *) &sa, sizeof sa);
}
int socket_connect6(int s, const char ip[16], u16 port, u32 scope_id){
struct sockaddr_in6 sa;
byte_zero(&sa, sizeof sa);
sa.sin6_family = PF_INET6;
u16_pack_big((char *) &sa.sin6_port, port);
sa.sin6_flowinfo = 0;
sa.sin6_scope_id = scope_id;
byte_copy((char *) &sa.sin6_addr, 16, ip);
return connect(s, (struct sockaddr *) &sa, sizeof sa);
}
int socket_udp6(void){
int s;
s = socket(PF_INET6, SOCK_DGRAM, 0);
if(s == -1){
if(errno == EINVAL)
s = socket(PF_INET, SOCK_DGRAM, 0);
}
return s;
}
int socket_udp(void){
return socket(PF_INET, SOCK_DGRAM, 0);
}
int socket_send4(int s, const char *buf, int len, const char ip[4], u16 port){
struct sockaddr_in sa;
byte_zero(&sa, sizeof(sa));
sa.sin_family = AF_INET;
u16_pack_big((char *) &sa.sin_port, port);
byte_copy((char *) &sa.sin_addr, 4, ip);
return sendto(s, buf, len, 0, (struct sockaddr *) &sa, sizeof(sa));
}
int socket_recv4(int s, char *buf, int len, char ip[4], u16 *port){
struct sockaddr_in sa;
socklen_t dummy = sizeof(sa);
int r;
r = recvfrom(s, buf, len, 0, (struct sockaddr *) &sa, &dummy);
if(r == -1) return -1;
byte_copy(ip, 4, (char *) &sa.sin_addr);
u16_unpack_big((char *) &sa.sin_port, port);
return r;
}
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