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/* Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include "common/sockaddr.h"
int sockaddr_init(sockaddr_t *addr, int af)
{
/* Reset pointer. */
memset(addr, 0, sizeof(sockaddr_t));
addr->family = -1;
/* Initialize address size. */
switch(af) {
case AF_INET:
addr->len = sizeof(struct sockaddr_in);
addr->prefix = IPV4_PREFIXLEN;
break;
#ifndef DISABLE_IPV6
case AF_INET6:
addr->len = sizeof(struct sockaddr_in6);
addr->prefix = IPV6_PREFIXLEN;
break;
#endif
default:
return -1;
}
/* Update pointer. */
addr->family = af;
return sockaddr_update(addr);
}
int sockaddr_isvalid(sockaddr_t *addr)
{
return addr && addr->family > -1;
}
int sockaddr_copy(sockaddr_t *dst, const sockaddr_t *src)
{
if (memcpy(dst, src, sizeof(sockaddr_t)) != NULL) {
return sockaddr_update(dst);
}
return -1;
}
int sockaddr_update(sockaddr_t *addr)
{
/* Update internal pointer. */
switch(addr->len) {
case sizeof(struct sockaddr_in):
addr->ptr = (struct sockaddr*)&addr->addr4;
break;
#ifndef DISABLE_IPV6
case sizeof(struct sockaddr_in6):
addr->ptr = (struct sockaddr*)&addr->addr6;
break;
#endif
default:
return -1;
}
return 0;
}
int sockaddr_set(sockaddr_t *dst, int family, const char* addr, int port)
{
if (!dst || !addr || port < 0) {
return -1;
}
/* Initialize. */
dst->family = -1;
dst->ptr = 0;
dst->len = 0;
sockaddr_init(dst, family);
/* Initialize depending on address family. */
void *paddr = 0;
switch(family) {
case AF_INET:
dst->addr4.sin_family = family;
dst->addr4.sin_port = htons(port);
paddr = &dst->addr4.sin_addr;
dst->addr4.sin_addr.s_addr = INADDR_ANY;
dst->prefix = IPV4_PREFIXLEN;
break;
#ifndef DISABLE_IPV6
case AF_INET6:
dst->addr6.sin6_family = family;
dst->addr6.sin6_port = htons(port);
paddr = &dst->addr6.sin6_addr;
memcpy(&dst->addr6.sin6_addr,
&in6addr_any, sizeof(in6addr_any));
dst->prefix = IPV6_PREFIXLEN;
break;
#endif
default:
return -1;
}
/* Convert address. */
return inet_pton(family, addr, paddr);
}
int sockaddr_setprefix(sockaddr_t *dst, int prefix)
{
if (dst == NULL || prefix < 0) {
return -1;
}
return dst->prefix = prefix;
}
int sockaddr_tostr(const sockaddr_t *addr, char *dst, size_t size)
{
if (!addr || !dst || size == 0) {
return -1;
}
/* Minimum length. */
size_t minlen = INET_ADDRSTRLEN;
/* Check unsupported IPv6. */
#ifdef DISABLE_IPV6
if (addr->family == AF_INET6) {
return -1;
}
#else
minlen = INET6_ADDRSTRLEN;
#endif
/* Check minimum length. */
if (size < minlen) {
return -1;
}
/* Convert. */
#ifdef DISABLE_IPV6
dst[0] = '\0';
#else
/* Load IPv6 addr if default. */
if (addr->family == AF_INET6) {
inet_ntop(addr->family, &addr->addr6.sin6_addr,
dst, size);
}
#endif
/* Load IPv4 if set. */
if (addr->family == AF_INET) {
inet_ntop(addr->family, &addr->addr4.sin_addr,
dst, size);
}
return 0;
}
int sockaddr_portnum(const sockaddr_t *addr)
{
if (!addr) {
return -1;
}
switch(addr->family) {
/* IPv4 */
case AF_INET:
return ntohs(addr->addr4.sin_port);
break;
/* IPv6 */
#ifndef DISABLE_IPV6
case AF_INET6:
return ntohs(addr->addr6.sin6_port);
break;
#endif
/* N/A */
default:
return -1;
break;
}
}
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