545 lines
11 KiB
C
545 lines
11 KiB
C
/*
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* $Id: config.c,v 1.1 2004/11/14 07:26:26 paulus Exp $
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*
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* Copyright (C) 1995,1996,1997 Lars Fenneberg
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*
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* Copyright 1992 Livingston Enterprises, Inc.
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*
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* Copyright 1992,1993, 1994,1995 The Regents of the University of Michigan
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* and Merit Network, Inc. All Rights Reserved
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*
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* See the file COPYRIGHT for the respective terms and conditions.
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* If the file is missing contact me at lf@elemental.net
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* and I'll send you a copy.
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*
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*/
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#include <includes.h>
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#include <radiusclient.h>
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#include <options.h>
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static int test_config(char *);
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/*
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* Function: find_option
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*
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* Purpose: find an option in the option list
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*
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* Returns: pointer to option on success, NULL otherwise
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*/
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static OPTION *find_option(char *optname, unsigned int type)
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{
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int i;
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/* there're so few options that a binary search seems not necessary */
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for (i = 0; i < num_options; i++) {
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if (!strcmp(config_options[i].name, optname) &&
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(config_options[i].type & type))
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return &config_options[i];
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}
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return NULL;
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}
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/*
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* Function: set_option_...
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*
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* Purpose: set a specific option doing type conversions
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*
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* Returns: 0 on success, -1 on failure
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*/
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static int set_option_str(char *filename, int line, OPTION *option, char *p)
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{
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if (p)
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option->val = (void *) strdup(p);
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else
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option->val = NULL;
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return 0;
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}
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static int set_option_int(char *filename, int line, OPTION *option, char *p)
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{
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int *iptr;
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if (p == NULL) {
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error("%s: line %d: bogus option value", filename, line);
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return (-1);
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}
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if ((iptr = (int *) malloc(sizeof(iptr))) == NULL) {
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novm("read_config");
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return (-1);
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}
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*iptr = atoi(p);
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option->val = (void *) iptr;
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return 0;
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}
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static int set_option_srv(char *filename, int line, OPTION *option, char *p)
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{
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SERVER *serv;
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char *q;
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struct servent *svp;
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int i;
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if (p == NULL) {
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error("%s: line %d: bogus option value", filename, line);
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return (-1);
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}
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serv = (SERVER *) option->val;
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for (i = 0; i < serv->max; i++) {
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free(serv->name[i]);
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}
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serv->max = 0;
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while ((p = strtok(p, ", \t")) != NULL) {
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if ((q = strchr(p,':')) != NULL) {
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*q = '\0';
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q++;
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serv->port[serv->max] = atoi(q);
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} else {
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if (!strcmp(option->name,"authserver"))
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if ((svp = getservbyname ("radius", "udp")) == NULL)
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serv->port[serv->max] = PW_AUTH_UDP_PORT;
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else
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serv->port[serv->max] = ntohs ((unsigned int) svp->s_port);
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else if (!strcmp(option->name, "acctserver"))
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if ((svp = getservbyname ("radacct", "udp")) == NULL)
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serv->port[serv->max] = PW_ACCT_UDP_PORT;
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else
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serv->port[serv->max] = ntohs ((unsigned int) svp->s_port);
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else {
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error("%s: line %d: no default port for %s", filename, line, option->name);
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return (-1);
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}
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}
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serv->name[serv->max++] = strdup(p);
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p = NULL;
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}
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return 0;
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}
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static int set_option_auo(char *filename, int line, OPTION *option, char *p)
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{
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int *iptr;
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if (p == NULL) {
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warn("%s: line %d: bogus option value", filename, line);
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return (-1);
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}
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if ((iptr = (int *) malloc(sizeof(iptr))) == NULL) {
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novm("read_config");
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return (-1);
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}
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*iptr = 0;
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p = strtok(p, ", \t");
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if (!strncmp(p, "local", 5))
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*iptr = AUTH_LOCAL_FST;
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else if (!strncmp(p, "radius", 6))
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*iptr = AUTH_RADIUS_FST;
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else {
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error("%s: auth_order: unknown keyword: %s", filename, p);
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return (-1);
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}
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p = strtok(NULL, ", \t");
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if (p && (*p != '\0')) {
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if ((*iptr & AUTH_RADIUS_FST) && !strcmp(p, "local"))
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*iptr = (*iptr) | AUTH_LOCAL_SND;
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else if ((*iptr & AUTH_LOCAL_FST) && !strcmp(p, "radius"))
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*iptr = (*iptr) | AUTH_RADIUS_SND;
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else {
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error("%s: auth_order: unknown or unexpected keyword: %s", filename, p);
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return (-1);
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}
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}
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option->val = (void *) iptr;
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return 0;
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}
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/*
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* Function: rc_read_config
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*
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* Purpose: read the global config file
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*
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* Returns: 0 on success, -1 when failure
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*/
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int rc_read_config(char *filename)
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{
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FILE *configfd;
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char buffer[512], *p;
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OPTION *option;
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int line, pos;
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if ((configfd = fopen(filename,"r")) == NULL)
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{
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error("rc_read_config: can't open %s: %m", filename);
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return (-1);
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}
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line = 0;
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while ((fgets(buffer, sizeof(buffer), configfd) != NULL))
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{
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line++;
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p = buffer;
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if ((*p == '\n') || (*p == '#') || (*p == '\0'))
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continue;
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p[strlen(p)-1] = '\0';
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if ((pos = strcspn(p, "\t ")) == 0) {
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error("%s: line %d: bogus format: %s", filename, line, p);
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return (-1);
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}
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p[pos] = '\0';
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if ((option = find_option(p, OT_ANY)) == NULL) {
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warn("%s: line %d: unrecognized keyword: %s", filename, line, p);
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continue;
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}
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if (option->status != ST_UNDEF) {
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error("%s: line %d: duplicate option line: %s", filename, line, p);
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return (-1);
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}
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p += pos+1;
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while (isspace(*p))
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p++;
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switch (option->type) {
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case OT_STR:
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if (set_option_str(filename, line, option, p) < 0)
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return (-1);
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break;
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case OT_INT:
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if (set_option_int(filename, line, option, p) < 0)
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return (-1);
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break;
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case OT_SRV:
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if (set_option_srv(filename, line, option, p) < 0)
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return (-1);
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break;
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case OT_AUO:
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if (set_option_auo(filename, line, option, p) < 0)
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return (-1);
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break;
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default:
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fatal("rc_read_config: impossible case branch!");
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abort();
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}
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}
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fclose(configfd);
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return test_config(filename);
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}
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/*
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* Function: rc_conf_str, rc_conf_int, rc_conf_src
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*
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* Purpose: get the value of a config option
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*
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* Returns: config option value
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*/
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char *rc_conf_str(char *optname)
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{
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OPTION *option;
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option = find_option(optname, OT_STR);
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if (option == NULL)
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fatal("rc_conf_str: unkown config option requested: %s", optname);
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return (char *)option->val;
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}
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int rc_conf_int(char *optname)
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{
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OPTION *option;
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option = find_option(optname, OT_INT|OT_AUO);
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if (option == NULL)
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fatal("rc_conf_int: unkown config option requested: %s", optname);
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return *((int *)option->val);
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}
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SERVER *rc_conf_srv(char *optname)
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{
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OPTION *option;
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option = find_option(optname, OT_SRV);
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if (option == NULL)
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fatal("rc_conf_srv: unkown config option requested: %s", optname);
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return (SERVER *)option->val;
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}
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/*
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* Function: test_config
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*
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* Purpose: test the configuration the user supplied
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*
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* Returns: 0 on success, -1 when failure
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*/
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static int test_config(char *filename)
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{
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#if 0
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struct stat st;
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char *file;
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#endif
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if (!(rc_conf_srv("authserver")->max))
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{
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error("%s: no authserver specified", filename);
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return (-1);
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}
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if (!(rc_conf_srv("acctserver")->max))
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{
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error("%s: no acctserver specified", filename);
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return (-1);
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}
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if (!rc_conf_str("servers"))
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{
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error("%s: no servers file specified", filename);
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return (-1);
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}
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if (!rc_conf_str("dictionary"))
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{
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error("%s: no dictionary specified", filename);
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return (-1);
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}
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if (rc_conf_int("radius_timeout") <= 0)
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{
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error("%s: radius_timeout <= 0 is illegal", filename);
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return (-1);
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}
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if (rc_conf_int("radius_retries") <= 0)
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{
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error("%s: radius_retries <= 0 is illegal", filename);
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return (-1);
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}
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#if 0
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file = rc_conf_str("login_local");
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if (stat(file, &st) == 0)
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{
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if (!S_ISREG(st.st_mode)) {
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error("%s: not a regular file: %s", filename, file);
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return (-1);
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}
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} else {
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error("%s: file not found: %s", filename, file);
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return (-1);
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}
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file = rc_conf_str("login_radius");
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if (stat(file, &st) == 0)
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{
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if (!S_ISREG(st.st_mode)) {
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error("%s: not a regular file: %s", filename, file);
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return (-1);
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}
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} else {
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error("%s: file not found: %s", filename, file);
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return (-1);
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}
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#endif
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if (rc_conf_int("login_tries") <= 0)
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{
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error("%s: login_tries <= 0 is illegal", filename);
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return (-1);
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}
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if (rc_conf_str("seqfile") == NULL)
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{
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error("%s: seqfile not specified", filename);
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return (-1);
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}
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if (rc_conf_int("login_timeout") <= 0)
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{
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error("%s: login_timeout <= 0 is illegal", filename);
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return (-1);
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}
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if (rc_conf_str("mapfile") == NULL)
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{
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error("%s: mapfile not specified", filename);
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return (-1);
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}
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if (rc_conf_str("nologin") == NULL)
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{
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error("%s: nologin not specified", filename);
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return (-1);
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}
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return 0;
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}
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/*
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* Function: rc_find_match
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*
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* Purpose: see if ip_addr is one of the ip addresses of hostname
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*
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* Returns: 0 on success, -1 when failure
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*
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*/
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static int find_match (UINT4 *ip_addr, char *hostname)
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{
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UINT4 addr;
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char **paddr;
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struct hostent *hp;
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if (rc_good_ipaddr (hostname) == 0)
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{
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if (*ip_addr == ntohl(inet_addr (hostname)))
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{
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return (0);
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}
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}
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else
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{
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if ((hp = gethostbyname (hostname)) == (struct hostent *) NULL)
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{
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return (-1);
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}
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for (paddr = hp->h_addr_list; *paddr; paddr++)
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{
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addr = ** (UINT4 **) paddr;
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if (ntohl(addr) == *ip_addr)
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{
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return (0);
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}
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}
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}
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return (-1);
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}
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/*
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* Function: rc_find_server
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*
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* Purpose: search a server in the servers file
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*
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* Returns: 0 on success, -1 on failure
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*
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*/
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int rc_find_server (char *server_name, UINT4 *ip_addr, char *secret)
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{
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UINT4 myipaddr = 0;
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int len;
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int result;
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FILE *clientfd;
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char *h;
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char *s;
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char *host2;
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char buffer[128];
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char hostnm[AUTH_ID_LEN + 1];
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/* Get the IP address of the authentication server */
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if ((*ip_addr = rc_get_ipaddr (server_name)) == (UINT4) 0)
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return (-1);
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if ((clientfd = fopen (rc_conf_str("servers"), "r")) == (FILE *) NULL)
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{
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error("rc_find_server: couldn't open file: %m: %s", rc_conf_str("servers"));
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return (-1);
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}
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myipaddr = rc_own_ipaddress();
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result = 0;
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while (fgets (buffer, sizeof (buffer), clientfd) != (char *) NULL)
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{
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if (*buffer == '#')
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continue;
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if ((h = strtok (buffer, " \t\n")) == NULL) /* first hostname */
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continue;
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memset (hostnm, '\0', AUTH_ID_LEN);
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len = strlen (h);
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if (len > AUTH_ID_LEN)
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{
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len = AUTH_ID_LEN;
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}
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strncpy (hostnm, h, (size_t) len);
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hostnm[AUTH_ID_LEN] = '\0';
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if ((s = strtok (NULL, " \t\n")) == NULL) /* and secret field */
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continue;
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memset (secret, '\0', MAX_SECRET_LENGTH);
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len = strlen (s);
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if (len > MAX_SECRET_LENGTH)
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{
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len = MAX_SECRET_LENGTH;
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}
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strncpy (secret, s, (size_t) len);
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secret[MAX_SECRET_LENGTH] = '\0';
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if (!strchr (hostnm, '/')) /* If single name form */
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{
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if (find_match (ip_addr, hostnm) == 0)
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{
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result++;
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break;
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}
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}
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else /* <name1>/<name2> "paired" form */
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{
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strtok (hostnm, "/");
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if (find_match (&myipaddr, hostnm) == 0)
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{ /* If we're the 1st name, target is 2nd */
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host2 = strtok (NULL, " ");
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if (find_match (ip_addr, host2) == 0)
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{
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result++;
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break;
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}
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}
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else /* If we were 2nd name, target is 1st name */
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{
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if (find_match (ip_addr, hostnm) == 0)
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{
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result++;
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break;
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}
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}
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}
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}
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fclose (clientfd);
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if (result == 0)
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{
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memset (buffer, '\0', sizeof (buffer));
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memset (secret, '\0', sizeof (secret));
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error("rc_find_server: couldn't find RADIUS server %s in %s",
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server_name, rc_conf_str("servers"));
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return (-1);
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}
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return 0;
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}
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