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gsm0808: Port cipher_complete to be part of libosmocore.

This commit is contained in:
Holger Hans Peter Freyther 2010-04-17 06:16:35 +02:00
parent 7daa01c434
commit 81716d5fa8
2 changed files with 32 additions and 1 deletions
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2
include/osmocore/gsm0808.h
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@ -27,6 +27,7 @@ struct msgb;
struct msgb *gsm0808_create_layer3(struct msgb *msg, uint16_t netcode, uint16_t countrycode, int lac, int ci);
struct msgb *gsm0808_create_reset(void);
struct msgb *gsm0808_create_clear_complete(void);
struct msgb *gsm0808_create_cipher_complete(struct msgb *layer3, uint8_t alg_id);
struct msgb *gsm0808_create_cipher_reject(uint8_t cause);
struct msgb *gsm0808_create_classmark_update(const uint8_t *classmark, uint8_t length);
struct msgb *gsm0808_create_sapi_reject(uint8_t link_id);
@ -37,7 +38,6 @@ const struct tlv_definition *gsm0808_att_tlvdef();
/* needs to be ported */
#if 0
struct msgb *bssmap_create_assignment_completed(struct gsm_lchan *lchan, uint8_t rr_cause);
struct msgb *bssmap_create_cipher_complete(struct msgb *layer3);
#endif
#endif

31
src/gsm0808.c
View File

@ -103,6 +103,37 @@ struct msgb *gsm0808_create_clear_complete(void)
return msg;
}
struct msgb *gsm0808_create_cipher_complete(struct msgb *layer3, uint8_t alg_id)
{
struct msgb *msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM,
"cipher-complete");
if (!msg)
return NULL;
/* send response with BSS override for A5/1... cheating */
msg->l3h = msgb_put(msg, 3);
msg->l3h[0] = BSSAP_MSG_BSS_MANAGEMENT;
msg->l3h[1] = 0xff;
msg->l3h[2] = BSS_MAP_MSG_CIPHER_MODE_COMPLETE;
/* include layer3 in case we have at least two octets */
if (layer3 && msgb_l3len(layer3) > 2) {
msg->l4h = msgb_put(msg, msgb_l3len(layer3) + 2);
msg->l4h[0] = GSM0808_IE_LAYER_3_MESSAGE_CONTENTS;
msg->l4h[1] = msgb_l3len(layer3);
memcpy(&msg->l4h[2], layer3->l3h, msgb_l3len(layer3));
}
/* and the optional BSS message */
msg->l4h = msgb_put(msg, 2);
msg->l4h[0] = GSM0808_IE_CHOSEN_ENCR_ALG;
msg->l4h[1] = alg_id;
/* update the size */
msg->l3h[1] = msgb_l3len(msg) - 2;
return msg;
}
struct msgb *gsm0808_create_cipher_reject(uint8_t cause)
{
struct msgb *msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM,