Mailer
/* $Id$ */
/* Copyright (c) 2015-2018 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Desktop Mailer */
/* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
#include <string.h>
#include <netdb.h>
/* prototypes */
static int _common_lookup(char const * hostname, uint16_t port,
struct addrinfo ** ai);
/* functions */
/* common_lookup */
static int _common_lookup(char const * hostname, uint16_t port,
struct addrinfo ** ai)
{
struct addrinfo hints;
int res;
char buf[6];
if(hostname == NULL)
return -error_set_code(1, "%s", strerror(errno));
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_flags = AI_NUMERICSERV;
snprintf(buf, sizeof(buf), "%hu", port);
if((res = getaddrinfo(hostname, buf, &hints, ai)) != 0)
return -error_set_code(1, "%s", gai_strerror(res));
return 0;
}
/* common_lookup_print */
static char * _common_lookup_print(struct addrinfo * ai)
{
char buf[128];
char buf2[128];
struct sockaddr_in * sin;
struct sockaddr_in6 * sin6;
switch(ai->ai_family)
{
case AF_INET:
sin = (struct sockaddr_in *)ai->ai_addr;
if(inet_ntop(ai->ai_family, &sin->sin_addr, buf,
sizeof(buf)) == NULL)
return NULL;
snprintf(buf2, sizeof(buf2), "%s:%hu", buf,
ntohs(sin->sin_port));
break;
case AF_INET6:
sin6 = (struct sockaddr_in6 *)ai->ai_addr;
if(inet_ntop(ai->ai_family, &sin6->sin6_addr, buf,
sizeof(buf)) == NULL)
return NULL;
snprintf(buf2, sizeof(buf2), "[%s]:%hu", buf,
ntohs(sin6->sin6_port));
break;
default:
return NULL;
}
return strdup(buf2);
}