lib/common/getportproto.c

	getportproto.c revision ab25eeb551a4be927a4b6ae2cf8aff7ed17decb4
/*
 * Copyright (C) 1993-2005  by Darren Reed.
 * See the IPFILTER.LICENCE file for details on licencing.
 */

#include <ctype.h>
#include "ipf.h"

int getportproto(name, proto)
char *name;
int proto;
{
    struct servent *s;
    struct protoent *p;

    if (ISDIGIT(*name)) {
        int number;
        char *s;

        for (s = name; *s != '\0'; s++)
            if (!ISDIGIT(*s))
                return -1;

        number = atoi(name);
        if (number < 0 || number > 65535)
            return -1;
        return htons(number);
    }

    p = getprotobynumber(proto);
    s = getservbyname(name, p ? p->p_name : NULL);
    if (s != NULL)
        return s->s_port;
    return -1;
}