pppd/plugins/radius/clientid.c

/*
 * $Id: clientid.c,v 1.1 2004/11/14 07:26:26 paulus Exp $
 *
 * Copyright (C) 1995,1996,1997 Lars Fenneberg
 *
 * See the file COPYRIGHT for the respective terms and conditions.
 * If the file is missing contact me at lf@elemental.net
 * and I'll send you a copy.
 *
 */

#include <includes.h>
#include <radiusclient.h>

struct map2id_s {
	char *name;
	UINT4 id;

	struct map2id_s *next;
};

static struct map2id_s *map2id_list = NULL;

/*
 * Function: rc_read_mapfile
 *
 * Purpose: Read in the ttyname to port id map file
 *
 * Arguments: the file name of the map file
 *
 * Returns: zero on success, negative integer on failure
 */

int rc_read_mapfile(char *filename)
{
	char buffer[1024];
	FILE *mapfd;
	char *c, *name, *id, *q;
	struct map2id_s *p;
	int lnr = 0;

	if ((mapfd = fopen(filename,"r")) == NULL)
	{
		error("rc_read_mapfile: can't read %s: %s", filename, strerror(errno));
		return (-1);
	}

#define SKIP(p) while(*p && isspace(*p)) p++;

	while (fgets(buffer, sizeof(buffer), mapfd) != NULL)
	{
		lnr++;

		q = buffer;

		SKIP(q);

		if ((*q == '\n') || (*q == '#') || (*q == '\0'))
			continue;

		if (( c = strchr(q, ' ')) || (c = strchr(q,'\t'))) {

			*c = '\0'; c++;
			SKIP(c);

			name = q;
			id = c;

			if ((p = (struct map2id_s *)malloc(sizeof(*p))) == NULL) {
				novm("rc_read_mapfile");
				return (-1);
			}

			p->name = strdup(name);
			p->id = atoi(id);
			p->next = map2id_list;
			map2id_list = p;

		} else {

			error("rc_read_mapfile: malformed line in %s, line %d", filename, lnr);
			return (-1);

		}
	}

#undef SKIP

	fclose(mapfd);

	return 0;
}

/*
 * Function: rc_map2id
 *
 * Purpose: Map ttyname to port id
 *
 * Arguments: full pathname of the tty
 *
 * Returns: port id, zero if no entry found
 */

UINT4 rc_map2id(char *name)
{
	struct map2id_s *p;
	char ttyname[PATH_MAX];

	*ttyname = '\0';
	if (*name != '/')
		strcpy(ttyname, "/dev/");

	strncat(ttyname, name, sizeof(ttyname) - strlen(ttyname) -1);

	for(p = map2id_list; p; p = p->next)
		if (!strcmp(ttyname, p->name)) return p->id;

	warn("rc_map2id: can't find tty %s in map database", ttyname);

	return 0;
}