--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/freeDiameter/p_sr.c	Fri Oct 30 17:23:06 2009 +0900
@@ -0,0 +1,145 @@
+/*********************************************************************************************************
+* Software License Agreement (BSD License)                                                               *
+* Author: Sebastien Decugis <sdecugis@nict.go.jp>							 *
+*													 *
+* Copyright (c) 2009, WIDE Project and NICT								 *
+* All rights reserved.											 *
+* 													 *
+* Redistribution and use of this software in source and binary forms, with or without modification, are  *
+* permitted provided that the following conditions are met:						 *
+* 													 *
+* * Redistributions of source code must retain the above 						 *
+*   copyright notice, this list of conditions and the 							 *
+*   following disclaimer.										 *
+*    													 *
+* * Redistributions in binary form must reproduce the above 						 *
+*   copyright notice, this list of conditions and the 							 *
+*   following disclaimer in the documentation and/or other						 *
+*   materials provided with the distribution.								 *
+* 													 *
+* * Neither the name of the WIDE Project or NICT nor the 						 *
+*   names of its contributors may be used to endorse or 						 *
+*   promote products derived from this software without 						 *
+*   specific prior written permission of WIDE Project and 						 *
+*   NICT.												 *
+* 													 *
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED *
+* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
+* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR *
+* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 	 *
+* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 	 *
+* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR *
+* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF   *
+* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.								 *
+*********************************************************************************************************/
+
+#include "fD.h"
+
+/* Structure to store a sent request */
+struct sentreq {
+	struct fd_list	chain; 	/* the "o" field points directly to the hop-by-hop of the request (uint32_t *)  */
+	struct msg	*req;	/* A request that was sent and not yet answered. */
+};
+
+/* Find an element in the list, or the following one */
+static struct fd_list * find_or_next(struct fd_list * srlist, uint32_t hbh, int * match)
+{
+	struct fd_list * li;
+	*match = 0;
+	for (li = srlist->next; li != srlist; li = li->next) {
+		uint32_t * nexthbh = li->o;
+		if (*nexthbh < hbh)
+			continue;
+		if (*nexthbh == hbh)
+			*match = 1;
+		break;
+	}
+	return li;
+}
+
+/* Store a new sent request */
+int fd_p_sr_store(struct sr_list * srlist, struct msg **req, uint32_t *hbhloc)
+{
+	struct sentreq * sr;
+	struct fd_list * next;
+	int match;
+	
+	TRACE_ENTRY("%p %p %p", srlist, req, hbhloc);
+	CHECK_PARAMS(srlist && req && *req && hbhloc);
+	
+	CHECK_MALLOC( sr = malloc(sizeof(struct sentreq)) );
+	memset(sr, 0, sizeof(struct sentreq));
+	fd_list_init(&sr->chain, hbhloc);
+	sr->req = *req;
+	
+	/* Search the place in the list */
+	CHECK_POSIX( pthread_mutex_lock(&srlist->mtx) );
+	next = find_or_next(&srlist->srs, *hbhloc, &match);
+	if (match) {
+		TRACE_DEBUG(INFO, "A request with the same hop-by-hop Id was already sent: error");
+		free(sr);
+		CHECK_POSIX_DO( pthread_mutex_unlock(&srlist->mtx), /* ignore */ );
+		return EINVAL;
+	}
+	
+	/* Save in the list */
+	*req = NULL;
+	fd_list_insert_before(next, &sr->chain);
+	CHECK_POSIX( pthread_mutex_unlock(&srlist->mtx) );
+	return 0;
+}
+
+/* Fetch a request by hbh */
+int fd_p_sr_fetch(struct sr_list * srlist, uint32_t hbh, struct msg **req)
+{
+	struct sentreq * sr;
+	int match;
+	
+	TRACE_ENTRY("%p %x %p", srlist, hbh, req);
+	CHECK_PARAMS(srlist && req);
+	
+	/* Search the request in the list */
+	CHECK_POSIX( pthread_mutex_lock(&srlist->mtx) );
+	sr = (struct sentreq *)find_or_next(&srlist->srs, hbh, &match);
+	if (!match) {
+		TRACE_DEBUG(INFO, "There is no saved request with this hop-by-hop id");
+		*req = NULL;
+	} else {
+		/* Unlink */
+		fd_list_unlink(&sr->chain);
+		*req = sr->req;
+		free(sr);
+	}
+	CHECK_POSIX( pthread_mutex_unlock(&srlist->mtx) );
+
+	/* Done */
+	return 0;
+}
+
+/* Failover requests (free or requeue routables) */
+void fd_p_sr_failover(struct sr_list * srlist)
+{
+	CHECK_POSIX_DO( pthread_mutex_lock(&srlist->mtx), /* continue anyway */ );
+	while (!FD_IS_LIST_EMPTY(&srlist->srs)) {
+		struct sentreq * sr = (struct sentreq *)(srlist->srs.next);
+		fd_list_unlink(&sr->chain);
+		if (fd_msg_is_routable(sr->req)) {
+			struct msg_hdr * hdr = NULL;
+			
+			/* Set the 'T' flag */
+			CHECK_FCT_DO(fd_msg_hdr(sr->req, &hdr), /* continue */);
+			if (hdr)
+				hdr->msg_flags |= CMD_FLAG_RETRANSMIT;
+			
+			/* Requeue for sending to another peer */
+			CHECK_FCT_DO(fd_fifo_post(fd_g_outgoing, &sr->req),
+					CHECK_FCT_DO(fd_msg_free(sr->req), /* What can we do more? */));
+		} else {
+			/* Just free the request... */
+			CHECK_FCT_DO(fd_msg_free(sr->req), /* Ignore */);
+		}
+		free(sr);
+	}
+	CHECK_POSIX_DO( pthread_mutex_unlock(&srlist->mtx), /* continue anyway */ );
+}
+