cellular-infrastructure
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osmo-msc
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mncc: Introduce a hello packet that is sent to the client. 

Send a hello packet down to the client with the version number
of the MNCC interface. The hello structure might be extended to
include the endianes, size of each structure, etc.
This commit is contained in:
Holger Hans Peter Freyther 2011-10-21 14:12:46 +02:00
parent 1491f2e7a9
commit 347e7ba377
2 changed files with 32 additions and 0 deletions
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8
openbsc/include/openbsc/mncc.h
View File

@ -96,6 +96,8 @@ struct gsm_call {
#define GSM_TCHF_FRAME 0x0300
#define GSM_TCHF_FRAME_EFR 0x0301
#define MNCC_SOCKET_HELLO 0x0400
#define GSM_MAX_FACILITY 128
#define GSM_MAX_SSVERSION 128
#define GSM_MAX_USERUSER 128
@ -158,6 +160,12 @@ struct gsm_data_frame {
unsigned char data[0];
};
#define MNCC_SOCK_VERSION 1
struct gsm_mncc_hello {
uint32_t msg_type;
uint32_t version;
};
char *get_mncc_name(int value);
void mncc_set_cause(struct gsm_mncc *data, int loc, int val);
void cc_tx_to_mncc(struct gsm_network *net, struct msgb *msg);

24
openbsc/src/libmsc/mncc_sock.c
View File

@ -203,6 +203,29 @@ static int mncc_sock_cb(struct osmo_fd *bfd, unsigned int flags)
return rc;
}
/**
* Send a version indication to the remote.
*/
static void queue_hello(struct mncc_sock_state *mncc)
{
struct gsm_mncc_hello *hello;
struct msgb *msg;
msg = msgb_alloc(512, "mncc hello");
if (!msg) {
LOGP(DMNCC, LOGL_ERROR, "Failed to allocate hello.\n");
mncc_sock_close(mncc);
return;
}
hello = (struct gsm_mncc_hello *) msgb_put(msg, sizeof(*hello));
hello->msg_type = MNCC_SOCKET_HELLO;
hello->version = MNCC_SOCK_VERSION;
msgb_enqueue(&mncc->net->upqueue, msg);
mncc->conn_bfd.when |= BSC_FD_WRITE;
}
/* accept a new connection */
static int mncc_sock_accept(struct osmo_fd *bfd, unsigned int flags)
{
@ -243,6 +266,7 @@ static int mncc_sock_accept(struct osmo_fd *bfd, unsigned int flags)
LOGP(DMNCC, LOGL_NOTICE, "MNCC Socket has connection with external "
"call control application\n");
queue_hello(state);
return 0;
}