ipa: Use enhanced ipa_msg_recv_buffered() to cope with partioned IPA messages
The old ipa_msg_recv() implementation didn't support partial receive,
so IPA connections got disconnected when this happened.
This patch adds the handling of the temporary message buffers and uses
ipa_msg_recv_buffered().
It has been successfully tested by jerlbeck with osmo-nitb and
osmo-bsc.
Ticket: OW#768
Sponsored-by: On-Waves ehf
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_msc.c b/openbsc/src/osmo-bsc/osmo_bsc_msc.c
index 6033985..04e9cf3 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_msc.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_msc.c
@@ -247,13 +247,15 @@
static int ipaccess_a_fd_cb(struct osmo_fd *bfd)
{
- struct msgb *msg;
+ struct msgb *msg = NULL;
struct ipaccess_head *hh;
struct osmo_msc_data *data = (struct osmo_msc_data *) bfd->data;
int ret;
- ret = ipa_msg_recv(bfd->fd, &msg);
+ ret = ipa_msg_recv_buffered(bfd->fd, &msg, &data->msc_con->pending_msg);
if (ret <= 0) {
+ if (ret == -EAGAIN)
+ return 0;
if (ret == 0) {
LOGP(DMSC, LOGL_ERROR, "The connection to the MSC was lost.\n");
bsc_msc_lost(data->msc_con);