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/* $OpenBSD: sockaddr.c,v 1.5 2012/06/14 20:59:42 gilles Exp $ */
/*
* Copyright (c) 2010 Eric Faurot <eric@faurot.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "dnsutil.h"
int
sockaddr_from_rr(struct sockaddr *sa, struct rr *rr)
{
struct sockaddr_in *sin;
struct sockaddr_in6 *sin6;
if (rr->rr_class != C_IN)
return (-1);
switch (rr->rr_type) {
case T_A:
sin = (struct sockaddr_in*)sa;
memset(sin, 0, sizeof *sin);
sin->sin_len = sizeof *sin;
sin->sin_family = PF_INET;
sin->sin_addr = rr->rr.in_a.addr;
sin->sin_port = 0;
return (0);
case T_AAAA:
sin6 = (struct sockaddr_in6*)sa;
memset(sin6, 0, sizeof *sin6);
sin6->sin6_len = sizeof *sin6;
sin6->sin6_family = PF_INET6;
sin6->sin6_addr = rr->rr.in_aaaa.addr6;
sin6->sin6_port = 0;
return (0);
default:
break;
}
return (-1);
}
int
sockaddr_from_str(struct sockaddr *sa, int family, const char *str)
{
struct in_addr ina;
struct in6_addr in6a;
struct sockaddr_in *sin;
struct sockaddr_in6 *sin6;
switch (family) {
case PF_UNSPEC:
if (sockaddr_from_str(sa, PF_INET, str) == 0)
return (0);
return sockaddr_from_str(sa, PF_INET6, str);
case PF_INET:
if (inet_pton(PF_INET, str, &ina) != 1)
return (-1);
sin = (struct sockaddr_in *)sa;
memset(sin, 0, sizeof *sin);
sin->sin_len = sizeof(struct sockaddr_in);
sin->sin_family = PF_INET;
sin->sin_addr.s_addr = ina.s_addr;
return (0);
case PF_INET6:
if (inet_pton(PF_INET6, str, &in6a) != 1)
return (-1);
sin6 = (struct sockaddr_in6 *)sa;
memset(sin6, 0, sizeof *sin6);
sin6->sin6_len = sizeof(struct sockaddr_in6);
sin6->sin6_family = PF_INET6;
sin6->sin6_addr = in6a;
return (0);
default:
break;
}
return (-1);
}
ssize_t
sockaddr_as_fqdn(const struct sockaddr *sa, char *dst, size_t max)
{
const struct in6_addr *in6_addr;
in_addr_t addr;
switch (sa->sa_family) {
case AF_INET:
addr = ntohl(((const struct sockaddr_in *)sa)->sin_addr.s_addr);
snprintf(dst, max,
"%d.%d.%d.%d.in-addr.arpa.",
addr & 0xff,
(addr >> 8) & 0xff,
(addr >> 16) & 0xff,
(addr >> 24) & 0xff);
break;
case AF_INET6:
in6_addr = &((const struct sockaddr_in6 *)sa)->sin6_addr;
snprintf(dst, max,
"%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x."
"%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x."
"ip6.arpa.",
in6_addr->s6_addr[15] & 0xf,
(in6_addr->s6_addr[15] >> 4) & 0xf,
in6_addr->s6_addr[14] & 0xf,
(in6_addr->s6_addr[14] >> 4) & 0xf,
in6_addr->s6_addr[13] & 0xf,
(in6_addr->s6_addr[13] >> 4) & 0xf,
in6_addr->s6_addr[12] & 0xf,
(in6_addr->s6_addr[12] >> 4) & 0xf,
in6_addr->s6_addr[11] & 0xf,
(in6_addr->s6_addr[11] >> 4) & 0xf,
in6_addr->s6_addr[10] & 0xf,
(in6_addr->s6_addr[10] >> 4) & 0xf,
in6_addr->s6_addr[9] & 0xf,
(in6_addr->s6_addr[9] >> 4) & 0xf,
in6_addr->s6_addr[8] & 0xf,
(in6_addr->s6_addr[8] >> 4) & 0xf,
in6_addr->s6_addr[7] & 0xf,
(in6_addr->s6_addr[7] >> 4) & 0xf,
in6_addr->s6_addr[6] & 0xf,
(in6_addr->s6_addr[6] >> 4) & 0xf,
in6_addr->s6_addr[5] & 0xf,
(in6_addr->s6_addr[5] >> 4) & 0xf,
in6_addr->s6_addr[4] & 0xf,
(in6_addr->s6_addr[4] >> 4) & 0xf,
in6_addr->s6_addr[3] & 0xf,
(in6_addr->s6_addr[3] >> 4) & 0xf,
in6_addr->s6_addr[2] & 0xf,
(in6_addr->s6_addr[2] >> 4) & 0xf,
in6_addr->s6_addr[1] & 0xf,
(in6_addr->s6_addr[1] >> 4) & 0xf,
in6_addr->s6_addr[0] & 0xf,
(in6_addr->s6_addr[0] >> 4) & 0xf);
break;
default:
break;
}
return (-1);
}
void
sockaddr_set_port(struct sockaddr *sa, int portno)
{
struct sockaddr_in *sin;
struct sockaddr_in6 *sin6;
switch (sa->sa_family) {
case PF_INET:
sin = (struct sockaddr_in *)sa;
sin->sin_port = htons(portno);
break;
case PF_INET6:
sin6 = (struct sockaddr_in6 *)sa;
sin6->sin6_port = htons(portno);
break;
}
}
int
sockaddr_connect(const struct sockaddr *sa, int socktype)
{
int errno_save, flags, sock;
if ((sock = socket(sa->sa_family, socktype, 0)) == -1)
goto fail;
if ((flags = fcntl(sock, F_GETFL, 0)) == -1)
goto fail;
flags |= O_NONBLOCK;
if ((flags = fcntl(sock, F_SETFL, flags)) == -1)
goto fail;
if (connect(sock, sa, sa->sa_len) == -1) {
if (errno == EINPROGRESS)
return (sock);
goto fail;
}
return (sock);
fail:
if (sock != -1) {
errno_save = errno;
close(sock);
errno = errno_save;
}
return (-1);
}
int
sockaddr_listen(const struct sockaddr *sa, int socktype)
{
int errno_save, sock;
if ((sock = socket(sa->sa_family, socktype, 0)) == -1)
return (-1);
if (bind(sock, sa, sa->sa_len) == -1) {
errno_save = errno;
close(sock);
errno = errno_save;
return (-1);
}
return (sock);
}
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