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/* $FreeBSD$ */
/*
* Copyright (C) 1993-2001 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*
*
* $Id: portnum.c,v 1.6.4.1 2004/12/09 19:41:22 darrenr Exp $
*/
#include <ctype.h>
#include "ipf.h"
/*
* find the port number given by the name, either from getservbyname() or
* straight atoi(). Return 1 on success, 0 on failure
*/
int portnum(name, proto, port, linenum)
char *name, *proto;
u_short *port;
int linenum;
{
struct servent *sp, *sp2;
u_short p1 = 0;
int i;
if (ISDIGIT(*name)) {
if (ratoi(name, &i, 0, USHRT_MAX)) {
*port = (u_short)i;
return 1;
}
fprintf(stderr, "%d: unknown port \"%s\"\n", linenum, name);
return 0;
}
if (proto != NULL && strcasecmp(proto, "tcp/udp") != 0) {
sp = getservbyname(name, proto);
if (sp) {
*port = ntohs(sp->s_port);
return 1;
}
fprintf(stderr, "%d: unknown service \"%s\".\n", linenum, name);
return 0;
}
sp = getservbyname(name, "tcp");
if (sp)
p1 = sp->s_port;
sp2 = getservbyname(name, "udp");
if (!sp || !sp2) {
fprintf(stderr, "%d: unknown tcp/udp service \"%s\".\n",
linenum, name);
return 0;
}
if (p1 != sp2->s_port) {
fprintf(stderr, "%d: %s %d/tcp is a different port to ",
linenum, name, p1);
fprintf(stderr, "%d: %s %d/udp\n", linenum, name, sp->s_port);
return 0;
}
*port = ntohs(p1);
return 1;
}
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