Change in libosmo-netif[master]: stream: Provide caller with SCTP flags during osmo_stream_*_recv()

pespin has uploaded this change for review. ( https://gerrit.osmocom.org/c/libosmo-netif/+/29414 ) Change subject: stream: Provide caller with SCTP flags during osmo_stream_*_recv() ...................................................................... stream: Provide caller with SCTP flags during osmo_stream_*_recv() The user may want to check the flags in order to know if the content pointed at by msgb is an sctp_notification structure, and not in-band data. This is useful for the user in order to gain connection state such as SCTP RESET notification, which means the client reconnected reusing the same socket, loosing all higher layers state. The MSG_NOTIFICATION from netinet/sctp.h is not reused, and instead an osmocom specific flag (and bitmask) is used. This is done in order to fit the flags in one byte, since for instance MSG_NOTIFICATION requires 2 bytes in my system (0x8000). Related: SYS#6113 Change-Id: I0ee94846a15a23950b9d70eaaef1251267296bdd --- M include/osmocom/netif/stream.h M src/stream.c 2 files changed, 5 insertions(+), 0 deletions(-) git pull ssh://gerrit.osmocom.org:29418/libosmo-netif refs/changes/14/29414/1 diff --git a/include/osmocom/netif/stream.h b/include/osmocom/netif/stream.h index b82dff1..489fc5d 100644 --- a/include/osmocom/netif/stream.h +++ b/include/osmocom/netif/stream.h @@ -9,6 +9,10 @@ * @{ */ +/*! \brief Access SCTP flags from the msgb control buffer */ +#define OSMO_STREAM_SCTP_MSG_FLAGS_NOTIFICATION 0x80 /* sctp_recvmsg() flags=MSG_NOTIFICATION, msgb_data() contains "union sctp_notification*" */ +#define msgb_sctp_msg_flags(msg) (msg)->cb[2] + /*! \brief Access the SCTP PPID from the msgb control buffer */ #define msgb_sctp_ppid(msg) (msg)->cb[3] /*! \brief Access the SCTP Stream ID from the msgb control buffer */ diff --git a/src/stream.c b/src/stream.c index bc209af..b45b730 100644 --- a/src/stream.c +++ b/src/stream.c @@ -1476,6 +1476,7 @@ if (flags & MSG_NOTIFICATION) { union sctp_notification *notif = (union sctp_notification *)msgb_data(msg); LOGP(DLINP, LOGL_DEBUG, "NOTIFICATION %u flags=0x%x\n", notif->sn_header.sn_type, notif->sn_header.sn_flags); + msgb_sctp_msg_flags(msg) = OSMO_STREAM_SCTP_MSG_FLAGS_NOTIFICATION; switch (notif->sn_header.sn_type) { case SCTP_ASSOC_CHANGE: LOGP(DLINP, LOGL_DEBUG, "===> ASSOC CHANGE:"); -- To view, visit https://gerrit.osmocom.org/c/libosmo-netif/+/29414 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmo-netif Gerrit-Branch: master Gerrit-Change-Id: I0ee94846a15a23950b9d70eaaef1251267296bdd Gerrit-Change-Number: 29414 Gerrit-PatchSet: 1 Gerrit-Owner: pespin <pespin(a)sysmocom.de> Gerrit-MessageType: newchange