Parse sms-submit messages
diff --git a/include/openbsc/gsm_04_11.h b/include/openbsc/gsm_04_11.h
index 3f4b0a3..84751a3 100644
--- a/include/openbsc/gsm_04_11.h
+++ b/include/openbsc/gsm_04_11.h
@@ -22,12 +22,30 @@
/* Chapter 8.1.1 */
struct gsm411_rp_data_hdr {
- u_int8_t len;
- u_int8_t msg_type;
+ u_int8_t len;
+ u_int8_t msg_type;
u_int8_t msg_ref;
u_int8_t data[0];
} __attribute__ ((packed));
+/* SMS submit PDU */
+struct sms_submit {
+ u_int8_t *smsc;
+ u_int8_t mti:2;
+ u_int8_t mms:1;
+ u_int8_t vpf:2;
+ u_int8_t sri:1;
+ u_int8_t udhi:1;
+ u_int8_t rp:1;
+ u_int8_t msg_ref;
+ u_int8_t *dest_addr;
+ u_int8_t pid;
+ u_int8_t dcs;
+ u_int8_t vp;
+ u_int8_t ud_len;
+ u_int8_t *user_data;
+};
+
struct msgb;
int gsm0411_rcv_sms(struct msgb *msg);
diff --git a/include/openbsc/msgb.h b/include/openbsc/msgb.h
index cfb9121..db1f8ae 100644
--- a/include/openbsc/msgb.h
+++ b/include/openbsc/msgb.h
@@ -36,6 +36,7 @@
unsigned char *l2h;
unsigned char *l3h;
+ unsigned char *smsh;
u_int16_t data_len;
u_int16_t len;
@@ -53,6 +54,7 @@
#define msgb_l2(m) ((void *)(m->l2h))
#define msgb_l3(m) ((void *)(m->l3h))
+#define msgb_sms(m) ((void *)(m->smsh))
static inline unsigned int msgb_headlen(const struct msgb *msgb)
{
diff --git a/src/gsm_04_11.c b/src/gsm_04_11.c
index 9325a79..c4ac286 100644
--- a/src/gsm_04_11.c
+++ b/src/gsm_04_11.c
@@ -35,6 +35,68 @@
#include <openbsc/gsm_04_08.h>
#include <openbsc/abis_rsl.h>
+static char *gsm411_7bit_decode(u_int8_t *user_data, u_int8_t length)
+{
+ u_int8_t d_off = 0, b_off = 0;
+ u_int8_t i;
+ char *text = malloc(length+1);
+
+ for (i=0;i<length;i++) {
+ text[i] = ((user_data[d_off] + (user_data[d_off+1]<<8)) & (0x7f<<b_off))>>b_off;
+ b_off += 7;
+ if (b_off >= 8) {
+ d_off += 1;
+ b_off -= 8;
+ }
+ }
+ text[i] = 0;
+ return text;
+}
+
+static int gsm411_sms_submit_from_msgb(struct msgb *msg)
+{
+ u_int8_t *smsp = msgb_sms(msg);
+ struct sms_submit *sms;
+
+ sms = malloc(sizeof(*sms));
+ sms->mti = *smsp & 0x03;
+ sms->mms = !!(*smsp & 0x04);
+ sms->vpf = (*smsp & 0x18) >> 3;
+ sms->sri = !!(*smsp & 0x20);
+ sms->udhi= !!(*smsp & 0x40);
+ sms->rp = !!(*smsp & 0x80);
+
+ smsp++;
+ sms->msg_ref = *smsp++;
+
+ /* Skip destination address for now */
+ smsp += 2 + *smsp/2 + *smsp%2;
+
+ sms->pid = *smsp++;
+ sms->dcs = *smsp++;
+ switch (sms->vpf)
+ {
+ case 2: /* relative */
+ sms->vp = *smsp++;
+ break;
+ default:
+ DEBUGP(DSMS, "SMS Validity period not implemented: 0x%02x\n",
+ sms->vpf);
+ }
+ sms->ud_len = *smsp++;
+
+ sms->user_data = gsm411_7bit_decode(smsp, sms->ud_len);
+
+ DEBUGP(DSMS, "SMS:\nMTI: 0x%02x, VPF: 0x%02x, MR: 0x%02x\n"
+ "PID: 0x%02x, DCS: 0x%02x, UserDataLength: 0x%02x\n"
+ "UserData: \"%s\"\n", sms->mti, sms->vpf, sms->msg_ref,
+ sms->pid, sms->dcs, sms->ud_len, sms->user_data);
+
+ free(sms);
+
+ return 0;
+}
+
static int gsm411_cp_data(struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
@@ -45,8 +107,10 @@
switch (msg_type) {
case GSM411_MT_RP_DATA_MO:
- DEBUGP(DSMS, "SMS RP-DATA (MO)\n");
-
+ DEBUGP(DSMS, "SMS RP-DATA (MO)\n");
+ /* Skip SMSC no and RP-UD length */
+ msg->smsh = &rp_data->data[1] + rp_data->data[1] + 2;
+ gsm411_sms_submit_from_msgb(msg);
break;
default:
DEBUGP(DSMS, "Unimplemented RP type 0x%02x\n", msg_type);