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/*
* iptools.c -- Some useful TCP/IP utils
*
* iptools.c is a part of binkd project
*
* Copyright (C) 1997-1998 Dima Maloff, 5047/13
*
* 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 2 of the License, or
* (at your option) any later version. See COPYING.
*/
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <fcntl.h>
#include <stdio.h>
#if defined(HAVE_SYS_IOCTL_H)
#include <sys/ioctl.h>
#endif
#include "sys.h"
#include "Config.h"
#include "iphdr.h"
#include "common.h"
#include "iptools.h"
#include "tools.h"
#include "sem.h"
#include "rfc2553.h"
/*
* Sets non-blocking mode for a given socket
*/
void setsockopts (SOCKET s)
{
#if defined(FIONBIO)
#if defined(UNIX) || defined(IBMTCPIP) || defined(AMIGA)
int arg;
arg = 1;
if (ioctl (s, FIONBIO, (char *) &arg, sizeof arg) < 0)
Log (1, "ioctl (FIONBIO): %s", TCPERR ());
#elif defined(WIN32)
u_long arg;
arg = 1;
if (ioctlsocket (s, FIONBIO, &arg) < 0)
if (!binkd_exit && TCPERRNO != WSAENOTSOCK)
Log (1, "ioctlsocket (FIONBIO): %s", TCPERR ());
#endif
#endif
#if defined(UNIX) || defined(EMX) || defined(AMIGA)
if (fcntl (s, F_SETFL, O_NONBLOCK) == -1)
Log (1, "fcntl: %s", strerror (errno));
#endif
}
/*
* Find the appropriate port string to be used.
* Find_port ("") will return binkp's port from /etc/services or even
* (if there is no binkp entry) 24554.
* Returns NULL on error.
*/
char * find_port (char *s)
{
char *ps = NULL;
struct addrinfo *aiHead, hints;
int aiErr;
/* setup hints for getaddrinfo */
memset((void *)&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_flags = AI_PASSIVE;
aiErr = getaddrinfo(NULL, (s && *s) ? s : PRTCLNAME, &hints, &aiHead);
if (aiErr == 0)
{
ps = (s && *s) ? s : PRTCLNAME;
freeaddrinfo(aiHead);
}
else
if (s == NULL || *s == 0)
ps = DEF_PORT;
if (ps == NULL)
Log (1, "%s: incorrect port (getaddrinfo: %s)", s, gai_strerror(aiErr));
return ps;
}
int sockaddr_cmp_addr(const struct sockaddr *a, const struct sockaddr *b)
{
if (a->sa_family != b->sa_family)
return a->sa_family - b->sa_family;
if (a->sa_family == AF_INET)
return (((struct sockaddr_in*)a)->sin_addr.s_addr - ((struct sockaddr_in*)b)->sin_addr.s_addr);
#ifdef AF_INET6
else if (a->sa_family == AF_INET6)
return memcmp((char *) &(((struct sockaddr_in6*)a)->sin6_addr),
(char *) &(((struct sockaddr_in6*)b)->sin6_addr),
sizeof(((struct sockaddr_in6*)a)->sin6_addr));
#endif
else
{
Log(2, "Unsupported address family: %d", a->sa_family);
return -1;
}
}
int sockaddr_cmp_port(const struct sockaddr *a, const struct sockaddr *b)
{
if (a->sa_family != b->sa_family)
return a->sa_family - b->sa_family;
if (a->sa_family == AF_INET)
return (((struct sockaddr_in*)a)->sin_port - ((struct sockaddr_in*)b)->sin_port);
#ifdef AF_INET6
else if (a->sa_family == AF_INET6)
return (((struct sockaddr_in6*)a)->sin6_port - ((struct sockaddr_in6*)b)->sin6_port);
#endif
else
{
Log(2, "Unsupported address family: %d", a->sa_family);
return -1;
}
}
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