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/* $FreeBSD: src/contrib/ipfilter/lib/portnum.c,v 1.2 2005/04/25 18:20:12 darrenr Exp $ */ |
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|
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/* |
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* Copyright (C) 1993-2001 by Darren Reed. |
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* |
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* See the IPFILTER.LICENCE file for details on licencing. |
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* |
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* |
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* Id: portnum.c,v 1.6.4.1 2004/12/09 19:41:22 darrenr Exp |
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*/ |
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|
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#include <ctype.h> |
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|
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#include "ipf.h" |
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|
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|
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/* |
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* find the port number given by the name, either from getservbyname() or |
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* straight atoi(). Return 1 on success, 0 on failure |
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*/ |
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int portnum(name, proto, port, linenum) |
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char *name, *proto; |
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u_short *port; |
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int linenum; |
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{ |
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struct servent *sp, *sp2; |
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u_short p1 = 0; |
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int i; |
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|
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if (ISDIGIT(*name)) { |
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if (ratoi(name, &i, 0, USHRT_MAX)) { |
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*port = (u_short)i; |
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return 1; |
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} |
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fprintf(stderr, "%d: unknown port \"%s\"\n", linenum, name); |
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return 0; |
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} |
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if (proto != NULL && strcasecmp(proto, "tcp/udp") != 0) { |
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sp = getservbyname(name, proto); |
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if (sp) { |
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*port = ntohs(sp->s_port); |
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return 1; |
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} |
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fprintf(stderr, "%d: unknown service \"%s\".\n", linenum, name); |
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return 0; |
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} |
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sp = getservbyname(name, "tcp"); |
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if (sp) |
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p1 = sp->s_port; |
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sp2 = getservbyname(name, "udp"); |
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if (!sp || !sp2) { |
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fprintf(stderr, "%d: unknown tcp/udp service \"%s\".\n", |
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linenum, name); |
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return 0; |
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} |
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if (p1 != sp2->s_port) { |
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fprintf(stderr, "%d: %s %d/tcp is a different port to ", |
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linenum, name, p1); |
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fprintf(stderr, "%d: %s %d/udp\n", linenum, name, sp->s_port); |
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return 0; |
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} |
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*port = ntohs(p1); |
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return 1; |
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} |
