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/**
* Copyright (C) 2011-2012 Juho Vähä-Herttua
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
*==================================================================
* modified by fduncanh 2022
*/
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "compat.h"
int
netutils_init()
{
#ifdef WIN32
WORD wVersionRequested;
WSADATA wsaData;
int ret;
wVersionRequested = MAKEWORD(2, 2);
ret = WSAStartup(wVersionRequested, &wsaData);
if (ret) {
return -1;
}
if (LOBYTE(wsaData.wVersion) != 2 ||
HIBYTE(wsaData.wVersion) != 2) {
/* Version mismatch, requested version not found */
return -1;
}
#endif
return 0;
}
void
netutils_cleanup()
{
#ifdef WIN32
WSACleanup();
#endif
}
unsigned char *
netutils_get_address(void *sockaddr, int *length, unsigned int *zone_id)
{
unsigned char ipv4_prefix[] = { 0,0,0,0,0,0,0,0,0,0,255,255 };
struct sockaddr *address = sockaddr;
assert(address);
assert(length);
assert(zone_id);
if (address->sa_family == AF_INET) {
struct sockaddr_in *sin;
*zone_id = 0;
sin = (struct sockaddr_in *)address;
*length = sizeof(sin->sin_addr.s_addr);
return (unsigned char *)&sin->sin_addr.s_addr;
} else if (address->sa_family == AF_INET6) {
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6 *)address;
if (!memcmp(sin6->sin6_addr.s6_addr, ipv4_prefix, 12)) {
/* Actually an embedded IPv4 address */
*zone_id = 0;
*length = sizeof(sin6->sin6_addr.s6_addr)-12;
return (sin6->sin6_addr.s6_addr+12);
}
*zone_id = (unsigned int) sin6->sin6_scope_id;
*length = sizeof(sin6->sin6_addr.s6_addr);
return sin6->sin6_addr.s6_addr;
}
*length = 0;
return NULL;
}
int
netutils_init_socket(unsigned short *port, int use_ipv6, int use_udp)
{
int family = use_ipv6 ? AF_INET6 : AF_INET;
int type = use_udp ? SOCK_DGRAM : SOCK_STREAM;
int proto = use_udp ? IPPROTO_UDP : IPPROTO_TCP;
struct sockaddr_storage saddr;
socklen_t socklen;
int server_fd;
int ret;
#ifndef _WIN32
int reuseaddr = 1;
#else
const char reuseaddr = 1;
#endif
assert(port);
server_fd = socket(family, type, proto);
if (server_fd == -1) {
goto cleanup;
}
ret = setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr, sizeof (reuseaddr));
if (ret == -1) {
goto cleanup;
}
memset(&saddr, 0, sizeof(saddr));
if (use_ipv6) {
struct sockaddr_in6 *sin6ptr = (struct sockaddr_in6 *)&saddr;
/* Initialize sockaddr for bind */
sin6ptr->sin6_family = family;
sin6ptr->sin6_addr = in6addr_any;
sin6ptr->sin6_port = htons(*port);
#ifndef _WIN32
int v6only = 1;
/* Make sure we only listen to IPv6 addresses */
setsockopt(server_fd, IPPROTO_IPV6, IPV6_V6ONLY,
(char *) &v6only, sizeof(v6only));
#endif
socklen = sizeof(*sin6ptr);
ret = bind(server_fd, (struct sockaddr *)sin6ptr, socklen);
if (ret == -1) {
goto cleanup;
}
ret = getsockname(server_fd, (struct sockaddr *)sin6ptr, &socklen);
if (ret == -1) {
goto cleanup;
}
*port = ntohs(sin6ptr->sin6_port);
} else {
struct sockaddr_in *sinptr = (struct sockaddr_in *)&saddr;
/* Initialize sockaddr for bind */
sinptr->sin_family = family;
sinptr->sin_addr.s_addr = INADDR_ANY;
sinptr->sin_port = htons(*port);
socklen = sizeof(*sinptr);
ret = bind(server_fd, (struct sockaddr *)sinptr, socklen);
if (ret == -1) {
goto cleanup;
}
ret = getsockname(server_fd, (struct sockaddr *)sinptr, &socklen);
if (ret == -1) {
goto cleanup;
}
*port = ntohs(sinptr->sin_port);
}
return server_fd;
cleanup:
ret = SOCKET_GET_ERROR();
if (server_fd != -1) {
closesocket(server_fd);
}
SOCKET_SET_ERROR(ret);
return -1;
}
// Src is the ip address
int
netutils_parse_address(int family, const char *src, void *dst, int dstlen)
{
struct addrinfo *result;
struct addrinfo *ptr;
struct addrinfo hints;
int length;
int ret;
if (family != AF_INET && family != AF_INET6) {
return -1;
}
if (!src || !dst) {
return -1;
}
memset(&hints, 0, sizeof(hints));
hints.ai_family = family;
hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
ret = getaddrinfo(src, NULL, &hints, &result);
if (ret != 0) {
return -1;
}
length = -1;
for (ptr=result; ptr!=NULL; ptr=ptr->ai_next) {
if (family == ptr->ai_family && (unsigned int)dstlen >= ptr->ai_addrlen) {
memcpy(dst, ptr->ai_addr, ptr->ai_addrlen);
length = ptr->ai_addrlen;
break;
}
}
freeaddrinfo(result);
return length;
}
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