bartoszek/zephyr
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drivers: modem: socket: allow partial packet reads

Browse Source 
Let's allow protocols to request portions of the current packet.

This is seen in the MQTT library when parsing headers for the type
and variable length of the packet.

This fixes basic parsing done in the MQTT library and probably others.

Signed-off-by: Michael Scott <mike@foundries.io>
This commit is contained in:
Michael Scott 2020-01-27 12:55:49 -08:00 committed by Jukka Rissanen
parent 8a3a4bb589
commit d4b8b5fcf2
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/modem/modem_socket.c
View File

@ -5,7 +5,7 @@
*/
/*
* Copyright (c) 2019 Foundries.io
* Copyright (c) 2019-2020 Foundries.io
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -82,6 +82,12 @@ int modem_socket_packet_size_update(struct modem_socket_config *cfg,
if (new_total < old_total) {
/* remove packets that are not included in new_size */
while (old_total > new_total && sock->packet_count > 0) {
/* handle partial read */
if (old_total - new_total < sock->packet_sizes[0]) {
sock->packet_sizes[0] -= old_total - new_total;
break;
}
old_total -= sock->packet_sizes[0];
modem_socket_packet_drop_first(sock);
}