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/*
* conversion from protocol/port string to protocol and port
* Copyright (C) 2002 Mario Strasser <mast@gmx.net>,
* Zuercher Hochschule Winterthur,
*
* 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 <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* RCSID $Id: ttoprotoport.c,v 1.5 2004/06/09 00:41:09 mcr Exp $
*/
#include "internal.h"
#include "openswan.h"
/*
* ttoprotoport - converts from protocol/port string to protocol and port
*/
err_t
ttoprotoport(src, src_len, proto, port, has_port_wildcard)
char *src; /* input string */
size_t src_len; /* length of input string, use strlen() if 0 */
u_int8_t *proto; /* extracted protocol number */
u_int16_t *port; /* extracted port number if it exists */
int *has_port_wildcard; /* set if port is %any */
{
char *end, *service_name;
char proto_name[16];
int proto_len;
long int l;
struct protoent *protocol;
struct servent *service;
int wildcard;
/* get the length of the string */
if (!src_len) src_len = strlen(src);
/* locate delimiter '/' between protocol and port */
end = strchr(src, '/');
if (end != NULL) {
proto_len = end - src;
service_name = end + 1;
} else {
proto_len = src_len;
service_name = src + src_len;
}
/* copy protocol name*/
memset(proto_name, '\0', sizeof(proto_name));
memcpy(proto_name, src, proto_len);
/* extract protocol by trying to resolve it by name */
protocol = getprotobyname(proto_name);
if (protocol != NULL) {
*proto = protocol->p_proto;
}
else /* failed, now try it by number */
{
l = strtol(proto_name, &end, 0);
if (*proto_name && *end)
return "<protocol> is neither a number nor a valid name";
if (l < 0 || l > 0xff)
return "<protocol> must be between 0 and 255";
*proto = (u_int8_t)l;
}
/* is there a port wildcard? */
wildcard = (strcmp(service_name, "%any") == 0);
if(has_port_wildcard) {
*has_port_wildcard = wildcard;
}
if (wildcard) {
*port = 0;
return NULL;
}
/* extract port by trying to resolve it by name */
service = getservbyname(service_name, NULL);
if (service != NULL) {
*port = ntohs(service->s_port);
}
else /* failed, now try it by number */
{
l = strtol(service_name, &end, 0);
if (*service_name && *end)
return "<port> is neither a number nor a valid name";
if (l < 0 || l > 0xffff)
return "<port> must be between 0 and 65535";
*port = (u_int16_t)l;
}
return NULL;
}
#ifdef TTOPROTOPORT_MAIN
#include <stdio.h>
struct artab;
static void regress(char *pgm);
/*
- main - convert first argument to hex, or run regression
*/
int
main(int argc, char *argv[])
{
char *pgm = argv[0];
const char *oops;
u_int8_t proto;
u_int16_t port;
int has_port_wildcard;
if (argc < 2) {
fprintf(stderr, "Usage: %s {0x<hex>|0s<base64>|-r}\n", pgm);
exit(2);
}
if (strcmp(argv[1], "-r") == 0) {
regress(pgm); /* should not return */
fprintf(stderr, "%s: regress() returned?!?\n", pgm);
exit(1);
}
oops = ttoprotoport(argv[1], strlen(argv[1]),
&proto, &port, &has_port_wildcard);
if (oops != NULL) {
fprintf(stderr, "%s: ttodata error `%s' in `%s'\n", pgm,
oops, argv[1]);
exit(1);
}
printf("%s -> %d/%d with %d\n",
argv[1], proto, port, has_port_wildcard);
exit(0);
}
struct artab {
char *ascii; /* NULL for end */
int proto, port, wild;
} atodatatab[] = {
/*{ "", 0, 0, -1 }, */
{ "tcp/%any", 6, 0, 1, },
{ NULL, 0, 0, 0, },
};
static void /* should not return at all, in fact */
regress(pgm)
char *pgm;
{
struct artab *r;
int status = 0;
err_t err;
for (r = atodatatab; r->ascii != NULL; r++) {
u_int8_t proto;
u_int16_t port;
int has_port_wildcard;
err = ttoprotoport(r->ascii, strlen(r->ascii),
&proto, &port, &has_port_wildcard);
if(r->wild == -1) {
if(err != NULL) {
/* okay, error expected */
continue;
} else {
printf("%s expected error, got none.\n", r->ascii);
status = 1;
continue;
}
}
if(err) {
printf("%s got error: %s\n", r->ascii, err);
status = 1;
continue;
}
if(proto != r->proto) {
printf("%s expected proto %d, got %d\n",r->ascii, proto, r->proto);
status = 1;
continue;
}
if(port != r->port) {
printf("%s expected port %d, got %d\n",r->ascii, port, r->port);
status = 1;
continue;
}
if(has_port_wildcard != r->wild) {
printf("%s expected wild %d, got %d\n",r->ascii,
has_port_wildcard, r->wild);
status = 1;
continue;
}
fflush(stdout);
}
exit(status);
}
#endif /* TTODATA_MAIN */
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