/* * 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 #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; }