radius_example/radius_example.c

   1 /*
   2  * Example application using RADIUS client as a library
   3  * Copyright (c) 2007, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "eloop.h"
  19 #include "radius/radius.h"
  20 #include "radius/radius_client.h"
  21
  22 extern int wpa_debug_level;
  23
  24 struct radius_ctx {
  25         struct radius_client_data *radius;
  26         struct hostapd_radius_servers conf;
  27         u8 radius_identifier;
  28         struct in_addr own_ip_addr;
  29 };
  30
  31
  32 static void hostapd_logger_cb(void *ctx, const u8 *addr, unsigned int module,
  33                               int level, const char *txt, size_t len)
  34 {
  35         printf("%s\n", txt);
  36 }
  37
  38
  39 /* Process the RADIUS frames from Authentication Server */
  40 static RadiusRxResult receive_auth(struct radius_msg *msg,
  41                                    struct radius_msg *req,
  42                                    const u8 *shared_secret,
  43                                    size_t shared_secret_len,
  44                                    void *data)
  45 {
  46         /* struct radius_ctx *ctx = data; */
  47         printf("Received RADIUS Authentication message; code=%d\n",
  48                radius_msg_get_hdr(msg)->code);
  49
  50         /* We're done for this example, so request eloop to terminate. */
  51         eloop_terminate();
  52
  53         return RADIUS_RX_PROCESSED;
  54 }
  55
  56
  57 static void start_example(void *eloop_ctx, void *timeout_ctx)
  58 {
  59         struct radius_ctx *ctx = eloop_ctx;
  60         struct radius_msg *msg;
  61
  62         printf("Sending a RADIUS authentication message\n");
  63
  64         ctx->radius_identifier = radius_client_get_id(ctx->radius);
  65         msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
  66                              ctx->radius_identifier);
  67         if (msg == NULL) {
  68                 printf("Could not create net RADIUS packet\n");
  69                 return;
  70         }
  71
  72         radius_msg_make_authenticator(msg, (u8 *) ctx, sizeof(*ctx));
  73
  74         if (!radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
  75                                  (u8 *) "user", 4)) {
  76                 printf("Could not add User-Name\n");
  77                 radius_msg_free(msg);
  78                 return;
  79         }
  80
  81         if (!radius_msg_add_attr_user_password(
  82                     msg, (u8 *) "password", 8,
  83                     ctx->conf.auth_server->shared_secret,
  84                     ctx->conf.auth_server->shared_secret_len)) {
  85                 printf("Could not add User-Password\n");
  86                 radius_msg_free(msg);
  87                 return;
  88         }
  89
  90         if (!radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
  91                                  (u8 *) &ctx->own_ip_addr, 4)) {
  92                 printf("Could not add NAS-IP-Address\n");
  93                 radius_msg_free(msg);
  94                 return;
  95         }
  96
  97         radius_client_send(ctx->radius, msg, RADIUS_AUTH, NULL);
  98 }
  99
 100
 101 int main(int argc, char *argv[])
 102 {
 103         struct radius_ctx ctx;
 104         struct hostapd_radius_server *srv;
 105
 106         if (os_program_init())
 107                 return -1;
 108
 109         hostapd_logger_register_cb(hostapd_logger_cb);
 110
 111         os_memset(&ctx, 0, sizeof(ctx));
 112         inet_aton("127.0.0.1", &ctx.own_ip_addr);
 113
 114         if (eloop_init()) {
 115                 printf("Failed to initialize event loop\n");
 116                 return -1;
 117         }
 118
 119         srv = os_zalloc(sizeof(*srv));
 120         if (srv == NULL)
 121                 return -1;
 122
 123         srv->addr.af = AF_INET;
 124         srv->port = 1812;
 125         if (hostapd_parse_ip_addr("127.0.0.1", &srv->addr) < 0) {
 126                 printf("Failed to parse IP address\n");
 127                 return -1;
 128         }
 129         srv->shared_secret = (u8 *) os_strdup("radius");
 130         srv->shared_secret_len = 6;
 131
 132         ctx.conf.auth_server = ctx.conf.auth_servers = srv;
 133         ctx.conf.num_auth_servers = 1;
 134         ctx.conf.msg_dumps = 1;
 135
 136         ctx.radius = radius_client_init(&ctx, &ctx.conf);
 137         if (ctx.radius == NULL) {
 138                 printf("Failed to initialize RADIUS client\n");
 139                 return -1;
 140         }
 141
 142         if (radius_client_register(ctx.radius, RADIUS_AUTH, receive_auth,
 143                                    &ctx) < 0) {
 144                 printf("Failed to register RADIUS authentication handler\n");
 145                 return -1;
 146         }
 147
 148         eloop_register_timeout(0, 0, start_example, &ctx, NULL);
 149
 150         eloop_run();
 151
 152         radius_client_deinit(ctx.radius);
 153         os_free(srv->shared_secret);
 154         os_free(srv);
 155
 156         eloop_destroy();
 157         os_program_deinit();
 158
 159         return 0;
 160 }