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libosmo-sccp
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udts/xudts: Attempt to implement unitdata service parsing 

Use the new offset based parsing to extract GT and data from the
UDTS/XUDTS message as well. Test vectors are missing right now.

Change-Id: Id0a3a291d8bad3f8c9621e6c97d4ea0b8bbe6035
This commit is contained in:
Holger Hans Peter Freyther 2019-05-02 00:12:16 +01:00
parent 1646d9b827
commit 174d33681a
1 changed files with 30 additions and 0 deletions
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30
src/sccp.c
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@ -469,6 +469,18 @@ int _sccp_parse_udt(struct msgb *msgb, struct sccp_parse_result *result)
return _sccp_parse_unitdata(msgb, result, &offsets);
}
int _sccp_parse_udts(struct msgb *msgb, struct sccp_parse_result *result)
{
static const struct udt_offsets offsets = {
.header_size = sizeof(struct sccp_data_unitdata_service),
.called_offset = offsetof(struct sccp_data_unitdata_service, variable_called),
.calling_offset = offsetof(struct sccp_data_unitdata_service, variable_calling),
.data_offset = offsetof(struct sccp_data_unitdata_service, variable_data),
};
return _sccp_parse_unitdata(msgb, result, &offsets);
}
static int _sccp_parse_xudt(struct msgb *msgb, struct sccp_parse_result *result)
{
static const struct udt_offsets offsets = {
@ -481,6 +493,18 @@ static int _sccp_parse_xudt(struct msgb *msgb, struct sccp_parse_result *result)
return _sccp_parse_unitdata(msgb, result, &offsets);
}
static int _sccp_parse_xudts(struct msgb *msgb, struct sccp_parse_result *result)
{
static const struct udt_offsets offsets = {
.header_size = sizeof(struct sccp_data_ext_unitdata_service),
.called_offset = offsetof(struct sccp_data_ext_unitdata_service, variable_called),
.calling_offset = offsetof(struct sccp_data_ext_unitdata_service, variable_calling),
.data_offset = offsetof(struct sccp_data_ext_unitdata_service, variable_data),
};
return _sccp_parse_unitdata(msgb, result, &offsets);
}
static int _sccp_parse_it(struct msgb *msgb, struct sccp_parse_result *result)
{
static const uint32_t header_size = sizeof(struct sccp_data_it);
@ -1490,9 +1514,15 @@ int sccp_parse_header(struct msgb *msg, struct sccp_parse_result *result)
case SCCP_MSG_TYPE_UDT:
return _sccp_parse_udt(msg, result);
break;
case SCCP_MSG_TYPE_UDTS:
return _sccp_parse_udts(msg, result);
break;
case SCCP_MSG_TYPE_XUDT:
return _sccp_parse_xudt(msg, result);
break;
case SCCP_MSG_TYPE_XUDTS:
return _sccp_parse_xudts(msg, result);
break;
case SCCP_MSG_TYPE_IT:
return _sccp_parse_it(msg, result);
break;