From ce64e57df8c9f7c53dc98a265513e15960d1841a Mon Sep 17 00:00:00 2001
From: Oleg Blednov <blake-r@linkfeed.ru>
Date: Thu, 31 Oct 2013 18:16:04 +0400
Subject: Right unexpected frames requeue in amqp_consumer.c

---
 librabbitmq/amqp_consumer.c |  4 ++--
 librabbitmq/amqp_socket.c   | 35 ++++++++++++++++++++++++++++++++---
 librabbitmq/amqp_socket.h   |  3 +++
 3 files changed, 37 insertions(+), 5 deletions(-)

(limited to 'librabbitmq')

diff --git a/librabbitmq/amqp_consumer.c b/librabbitmq/amqp_consumer.c
index 6fb5b96..6c6c1c9 100644
--- a/librabbitmq/amqp_consumer.c
+++ b/librabbitmq/amqp_consumer.c
@@ -153,7 +153,7 @@ amqp_consume_message(amqp_connection_state_t state, amqp_envelope_t *envelope,
 
   if (AMQP_FRAME_METHOD != frame.frame_type
       || AMQP_BASIC_DELIVER_METHOD != frame.payload.method.id) {
-    amqp_queue_frame(state, &frame);
+    amqp_put_back_frame(state, &frame);
     ret.reply_type = AMQP_RESPONSE_LIBRARY_EXCEPTION;
     ret.library_error = AMQP_STATUS_UNEXPECTED_STATE;
     goto error_out1;
@@ -227,7 +227,7 @@ amqp_rpc_reply_t amqp_read_message(amqp_connection_state_t state,
       ret.reply_type = AMQP_RESPONSE_LIBRARY_EXCEPTION;
       ret.library_error = AMQP_STATUS_UNEXPECTED_STATE;
 
-      amqp_queue_frame(state, &frame);
+      amqp_put_back_frame(state, &frame);
     }
     goto error_out1;
   }
diff --git a/librabbitmq/amqp_socket.c b/librabbitmq/amqp_socket.c
index 061e739..79a7696 100644
--- a/librabbitmq/amqp_socket.c
+++ b/librabbitmq/amqp_socket.c
@@ -786,7 +786,7 @@ beginrecv:
   }
 }
 
-int amqp_queue_frame(amqp_connection_state_t state, amqp_frame_t *frame)
+static amqp_link_t * amqp_create_link_for_frame(amqp_connection_state_t state, amqp_frame_t *frame)
 {
   amqp_link_t *link;
   amqp_frame_t *frame_copy;
@@ -794,19 +794,29 @@ int amqp_queue_frame(amqp_connection_state_t state, amqp_frame_t *frame)
   amqp_pool_t *channel_pool = amqp_get_or_create_channel_pool(state, frame->channel);
 
   if (NULL == channel_pool) {
-    return AMQP_STATUS_NO_MEMORY;
+    return NULL;
   }
 
   link = amqp_pool_alloc(channel_pool, sizeof(amqp_link_t));
   frame_copy = amqp_pool_alloc(channel_pool, sizeof(amqp_frame_t));
 
   if (NULL == link || NULL == frame_copy) {
-    return AMQP_STATUS_NO_MEMORY;
+    return NULL;
   }
 
   *frame_copy = *frame;
   link->data = frame_copy;
 
+  return link;
+}
+
+int amqp_queue_frame(amqp_connection_state_t state, amqp_frame_t *frame)
+{
+  amqp_link_t *link = amqp_create_link_for_frame(state, frame);
+  if (NULL == link) {
+    return AMQP_STATUS_NO_MEMORY;
+  }
+
   if (NULL == state->first_queued_frame) {
     state->first_queued_frame = link;
   } else {
@@ -819,6 +829,25 @@ int amqp_queue_frame(amqp_connection_state_t state, amqp_frame_t *frame)
   return AMQP_STATUS_OK;
 }
 
+int amqp_put_back_frame(amqp_connection_state_t state, amqp_frame_t *frame)
+{
+  amqp_link_t *link = amqp_create_link_for_frame(state, frame);
+  if (NULL == link) {
+    return AMQP_STATUS_NO_MEMORY;
+  }
+
+  if (NULL == state->first_queued_frame) {
+    state->first_queued_frame = link;
+    state->last_queued_frame = link;
+    link->next = NULL;
+  } else {
+    link->next = state->first_queued_frame;
+    state->first_queued_frame = link;
+  }
+
+  return AMQP_STATUS_OK;
+}
+
 int amqp_simple_wait_frame_on_channel(amqp_connection_state_t state,
                                       amqp_channel_t channel,
                                       amqp_frame_t *decoded_frame)
diff --git a/librabbitmq/amqp_socket.h b/librabbitmq/amqp_socket.h
index b7af785..f8b6f51 100644
--- a/librabbitmq/amqp_socket.h
+++ b/librabbitmq/amqp_socket.h
@@ -182,6 +182,9 @@ amqp_open_socket_noblock(char const *hostname, int portnumber, struct timeval *t
 int
 amqp_queue_frame(amqp_connection_state_t state, amqp_frame_t *frame);
 
+int
+amqp_put_back_frame(amqp_connection_state_t state, amqp_frame_t *frame);
+
 int
 amqp_simple_wait_frame_on_channel(amqp_connection_state_t state,
                                   amqp_channel_t channel,
-- 
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