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libosmo-sccp
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xua_msg: Add support for msg_event_maps 

msg_event_maps facilitate the mapping from a xUA message (class + type)
to an integer event.  This is useful when passing xUA messages to a
osmo_fsm.

Change-Id: Iee1c7fc2bf64219ebb71a0dbe6fd210749332413
This commit is contained in:
Harald Welte 2017-04-03 18:24:23 +02:00
parent d75e8967ef
commit c96db7fa58
2 changed files with 30 additions and 0 deletions
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9
include/osmocom/sigtran/xua_msg.h
View File

@ -60,6 +60,12 @@ struct xua_dialect {
const struct xua_msg_class *class[256];
};
struct xua_msg_event_map {
uint8_t msg_class;
uint8_t msg_type;
int event;
};
extern const struct xua_dialect xua_dialect_sua;
extern const struct xua_dialect xua_dialect_m3ua;
@ -94,3 +100,6 @@ char *xua_hdr_dump(struct xua_msg *xua, const struct xua_dialect *dialect);
char *xua_msg_dump(struct xua_msg *xua, const struct xua_dialect *dialect);
int xua_dialect_check_all_mand_ies(const struct xua_dialect *dialect, struct xua_msg *xua);
int xua_msg_event_map(const struct xua_msg *xua,
const struct xua_msg_event_map *maps,
unsigned int num_maps);

21
src/xua_msg.c
View File

@ -361,6 +361,27 @@ int xua_msg_add_sccp_addr(struct xua_msg *xua, uint16_t iei, const struct osmo_s
return rc;
}
/*! \brief Map from a xua_msg (class+type) to an event
* \param[in] xua xUA message which is to be mapped
* \param[in] maps Table containing msg type+class -> event maps
* \[aram[in] num_maps number of entries in \ref maps
* \returns event >= 0; negative on error (no map found) */
int xua_msg_event_map(const struct xua_msg *xua,
const struct xua_msg_event_map *maps,
unsigned int num_maps)
{
int i;
for (i= 0; i < num_maps; i++) {
const struct xua_msg_event_map *map = &maps[i];
if (xua->hdr.msg_class == map->msg_class &&
xua->hdr.msg_type == map->msg_type) {
return map->event;
}
}
return -1;
}
const char *xua_class_msg_name(const struct xua_msg_class *xmc, uint16_t msg_type)
{
static char class_buf[64];