2 * Copyright (c) 2012, JANET(UK)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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10 * notice, this list of conditions and the following disclaimer.
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17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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40 #include <sys/socket.h>
41 #include <netinet/in.h>
44 #include <trust_router/tid.h>
48 static int tids_listen (TIDS_INSTANCE *tids, int port)
53 struct sockaddr_storage storage;
54 struct sockaddr_in in4;
56 struct sockaddr_in *saddr = (struct sockaddr_in *) &addr.in4;
58 saddr->sin_port = htons (port);
59 saddr->sin_family = AF_INET;
60 saddr->sin_addr.s_addr = INADDR_ANY;
62 if (0 > (conn = socket (AF_INET, SOCK_STREAM, 0)))
65 if (0 > (rc = bind (conn, (struct sockaddr *) saddr, sizeof(struct sockaddr_in))))
68 if (0 > (rc = listen(conn, 512)))
71 fprintf (stdout, "TID Server listening on port %d\n", port);
75 static int tids_auth_connection (int conn, gss_ctx_id_t *gssctx)
78 int auth, autherr = 0;
80 if (rc = gsscon_passive_authenticate(conn, gssctx)) {
81 fprintf(stderr, "Error from gsscon_passive_authenticate(), rc = %d.\n", rc);
85 if (rc = gsscon_authorize(*gssctx, &auth, &autherr)) {
86 fprintf(stderr, "Error from gsscon_authorize, rc = %d, autherr = %d.\n",
92 fprintf(stdout, "Connection authenticated, conn = %d.\n", conn);
94 fprintf(stderr, "Authentication failed, conn %d.\n", conn);
99 static int tids_read_request (TIDS_INSTANCE *tids, int conn, gss_ctx_id_t *gssctx, TR_MSG **mreq)
105 if (err = gsscon_read_encrypted_token(conn, *gssctx, &buf, &buflen)) {
111 fprintf(stdout, "tids_read_request():Request Received, %u bytes.\n", (unsigned) buflen);
114 if (NULL == ((*mreq) = tr_msg_decode(buf, buflen))) {
115 printf("tids_read_request():Error decoding request.\n");
120 /* If this isn't a TID Request, just drop it. */
121 if (TID_REQUEST != (*mreq)->msg_type) {
122 printf("tids_read_request(): Not a TID Request, dropped.\n");
130 static int tids_handle_request (TIDS_INSTANCE *tids, TR_MSG *mreq, TID_RESP **resp)
134 /* Check that this is a valid TID Request. If not, send an error return. */
135 if ((!mreq->tid_req) ||
136 (!mreq->tid_req->rp_realm) ||
137 (!mreq->tid_req->realm) ||
138 (!mreq->tid_req->comm)) {
139 printf("tids_handle_request():Not a valid TID Request.\n");
140 (*resp)->result = TID_ERROR;
141 (*resp)->err_msg = tr_new_name("Bad request format");
145 /* Call the caller's request handler */
146 /* TBD -- Handle different error returns/msgs */
147 if (0 > (rc = (*tids->req_handler)(tids, mreq->tid_req, &(*resp), tids->cookie))) {
148 /* set-up an error response */
149 (*resp)->result = TID_ERROR;
150 if (!(*resp)->err_msg) /* Use msg set by handler, if any */
151 (*resp)->err_msg = tr_new_name("Internal processing error");
154 /* set-up a success response */
155 (*resp)->result = TID_SUCCESS;
156 (*resp)->err_msg = NULL; /* No msg on successful return */
162 int tids_send_response (TIDS_INSTANCE *tids, int conn, gss_ctx_id_t *gssctx, TID_RESP *resp)
168 mresp.msg_type = TID_RESPONSE;
169 mresp.tid_resp = resp;
171 if (NULL == (resp_buf = tr_msg_encode(&mresp))) {
172 fprintf(stderr, "Error decoding json response.\n");
176 printf("Encoded response:\n%s\n", resp_buf);
178 /* Send the response over the connection */
179 if (err = gsscon_write_encrypted_token (conn, *gssctx, resp_buf,
180 strlen(resp_buf) + 1)) {
181 fprintf(stderr, "Error sending response over connection.\n");
190 static void tids_handle_connection (TIDS_INSTANCE *tids, int conn)
193 TID_RESP *resp = NULL;
195 gss_ctx_id_t gssctx = GSS_C_NO_CONTEXT;
197 if (tids_auth_connection(conn, &gssctx)) {
198 fprintf(stderr, "Error authorizing TID Server connection.\n");
203 printf("Connection authorized!\n");
205 while (1) { /* continue until an error breaks us out */
207 if (0 > (rc = tids_read_request(tids, conn, &gssctx, &mreq))) {
208 fprintf(stderr, "Error from tids_read_request(), rc = %d.\n", rc);
210 } else if (0 == rc) {
214 /* Put connection information into the request structure */
215 mreq->tid_req->conn = conn;
216 mreq->tid_req->gssctx = gssctx;
218 /* Allocate a response structure and populate common fields */
219 if ((NULL == (resp = calloc(sizeof(TID_RESP), 1)))) {
220 fprintf(stderr, "Error allocating response structure.\n");
224 /* TBD -- handle errors */
225 resp->result = TID_SUCCESS; /* presume success */
226 resp->rp_realm = tr_dup_name(mreq->tid_req->rp_realm);
227 resp->realm = tr_dup_name(mreq->tid_req->realm);
228 resp->comm = tr_dup_name(mreq->tid_req->comm);
229 if (mreq->tid_req->orig_coi)
230 resp->orig_coi = tr_dup_name(mreq->tid_req->orig_coi);
232 if (0 > (rc = tids_handle_request(tids, mreq, &resp))) {
233 fprintf(stderr, "Error from tids_handle_request(), rc = %d.\n", rc);
237 if (0 > (rc = tids_send_response(tids, conn, &gssctx, resp))) {
238 fprintf(stderr, "Error from tids_send_response(), rc = %d.\n", rc);
246 TIDS_INSTANCE *tids_create (void)
248 TIDS_INSTANCE *tids = NULL;
249 if (tids = malloc(sizeof(TIDS_INSTANCE)))
250 memset(tids, 0, sizeof(TIDS_INSTANCE));
254 int tids_start (TIDS_INSTANCE *tids,
255 TIDS_REQ_FUNC *req_handler,
263 if (0 > (listen = tids_listen(tids, TID_PORT)))
264 perror ("Error from tids_listen()");
266 setsockopt(listen, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
268 /* store the caller's request handler & cookie */
269 tids->req_handler = req_handler;
270 tids->cookie = cookie;
272 while(1) { /* accept incoming conns until we are stopped */
274 if (0 > (conn = accept(listen, NULL, NULL))) {
275 perror("Error from TIDS Server accept()");
279 if (0 > (pid = fork())) {
280 perror("Error on fork()");
286 tids_handle_connection(tids, conn);
294 return 1; /* should never get here */
297 void tids_destroy (TIDS_INSTANCE *tids)