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