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-rw-r--r--openbsc/src/libmsc/gsm_04_11.c232
1 files changed, 5 insertions, 227 deletions
diff --git a/openbsc/src/libmsc/gsm_04_11.c b/openbsc/src/libmsc/gsm_04_11.c
index fe1b645a0..dabfd0b81 100644
--- a/openbsc/src/libmsc/gsm_04_11.c
+++ b/openbsc/src/libmsc/gsm_04_11.c
@@ -39,6 +39,7 @@
#include <osmocom/gsm/tlv.h>
#include <osmocom/gsm/gsm_utils.h>
+#include <osmocom/gsm/gsm0411_utils.h>
#include <openbsc/debug.h>
#include <openbsc/gsm_data.h>
@@ -250,221 +251,6 @@ static int gsm411_rp_sendmsg(struct msgb *msg, struct gsm_trans *trans,
return gsm411_cp_sendmsg(msg, trans, GSM411_MT_CP_DATA);
}
-/* Turn int into semi-octet representation: 98 => 0x89 */
-static uint8_t bcdify(uint8_t value)
-{
- uint8_t ret;
-
- ret = value / 10;
- ret |= (value % 10) << 4;
-
- return ret;
-}
-
-/* Turn semi-octet representation into int: 0x89 => 98 */
-static uint8_t unbcdify(uint8_t value)
-{
- uint8_t ret;
-
- if ((value & 0x0F) > 9 || (value >> 4) > 9)
- LOGP(DSMS, LOGL_ERROR,
- "unbcdify got too big nibble: 0x%02X\n", value);
-
- ret = (value&0x0F)*10;
- ret += value>>4;
-
- return ret;
-}
-
-/* Generate 03.40 TP-SCTS */
-static void gsm340_gen_scts(uint8_t *scts, time_t time)
-{
- struct tm *tm = localtime(&time);
-
- *scts++ = bcdify(tm->tm_year % 100);
- *scts++ = bcdify(tm->tm_mon + 1);
- *scts++ = bcdify(tm->tm_mday);
- *scts++ = bcdify(tm->tm_hour);
- *scts++ = bcdify(tm->tm_min);
- *scts++ = bcdify(tm->tm_sec);
-#ifdef HAVE_TM_GMTOFF_IN_TM
- *scts++ = bcdify(tm->tm_gmtoff/(60*15));
-#else
-#warning find a portable way to obtain timezone offset
- *scts++ = 0;
-#endif
-}
-
-/* Decode 03.40 TP-SCTS (into utc/gmt timestamp) */
-static time_t gsm340_scts(uint8_t *scts)
-{
- struct tm tm;
-
- uint8_t yr = unbcdify(*scts++);
-
- if (yr <= 80)
- tm.tm_year = 100 + yr;
- else
- tm.tm_year = yr;
- tm.tm_mon = unbcdify(*scts++) - 1;
- tm.tm_mday = unbcdify(*scts++);
- tm.tm_hour = unbcdify(*scts++);
- tm.tm_min = unbcdify(*scts++);
- tm.tm_sec = unbcdify(*scts++);
- /* according to gsm 03.40 time zone is
- "expressed in quarters of an hour" */
-#ifdef HAVE_TM_GMTOFF_IN_TM
- tm.tm_gmtoff = unbcdify(*scts++) * 15*60;
-#endif
-
- return mktime(&tm);
-}
-
-/* Return the default validity period in minutes */
-static unsigned long gsm340_vp_default(void)
-{
- unsigned long minutes;
- /* Default validity: two days */
- minutes = 24 * 60 * 2;
- return minutes;
-}
-
-/* Decode validity period format 'relative' */
-static unsigned long gsm340_vp_relative(uint8_t *sms_vp)
-{
- /* Chapter 9.2.3.12.1 */
- uint8_t vp;
- unsigned long minutes;
-
- vp = *(sms_vp);
- if (vp <= 143)
- minutes = vp + 1 * 5;
- else if (vp <= 167)
- minutes = 12*60 + (vp-143) * 30;
- else if (vp <= 196)
- minutes = vp-166 * 60 * 24;
- else
- minutes = vp-192 * 60 * 24 * 7;
- return minutes;
-}
-
-/* Decode validity period format 'absolute' */
-static unsigned long gsm340_vp_absolute(uint8_t *sms_vp)
-{
- /* Chapter 9.2.3.12.2 */
- time_t expires, now;
- unsigned long minutes;
-
- expires = gsm340_scts(sms_vp);
- now = time(NULL);
- if (expires <= now)
- minutes = 0;
- else
- minutes = (expires-now)/60;
- return minutes;
-}
-
-/* Decode validity period format 'relative in integer representation' */
-static unsigned long gsm340_vp_relative_integer(uint8_t *sms_vp)
-{
- uint8_t vp;
- unsigned long minutes;
- vp = *(sms_vp);
- if (vp == 0) {
- LOGP(DSMS, LOGL_ERROR,
- "reserved relative_integer validity period\n");
- return gsm340_vp_default();
- }
- minutes = vp/60;
- return minutes;
-}
-
-/* Decode validity period format 'relative in semi-octet representation' */
-static unsigned long gsm340_vp_relative_semioctet(uint8_t *sms_vp)
-{
- unsigned long minutes;
- minutes = unbcdify(*sms_vp++)*60; /* hours */
- minutes += unbcdify(*sms_vp++); /* minutes */
- minutes += unbcdify(*sms_vp++)/60; /* seconds */
- return minutes;
-}
-
-/* decode validity period. return minutes */
-static unsigned long gsm340_validity_period(uint8_t sms_vpf, uint8_t *sms_vp)
-{
- uint8_t fi; /* functionality indicator */
-
- switch (sms_vpf) {
- case GSM340_TP_VPF_RELATIVE:
- return gsm340_vp_relative(sms_vp);
- case GSM340_TP_VPF_ABSOLUTE:
- return gsm340_vp_absolute(sms_vp);
- case GSM340_TP_VPF_ENHANCED:
- /* Chapter 9.2.3.12.3 */
- fi = *sms_vp++;
- /* ignore additional fi */
- if (fi & (1<<7)) sms_vp++;
- /* read validity period format */
- switch (fi & 0x7) {
- case 0x0:
- return gsm340_vp_default(); /* no vpf specified */
- case 0x1:
- return gsm340_vp_relative(sms_vp);
- case 0x2:
- return gsm340_vp_relative_integer(sms_vp);
- case 0x3:
- return gsm340_vp_relative_semioctet(sms_vp);
- default:
- /* The GSM spec says that the SC should reject any
- unsupported and/or undefined values. FIXME */
- LOGP(DSMS, LOGL_ERROR,
- "Reserved enhanced validity period format\n");
- return gsm340_vp_default();
- }
- case GSM340_TP_VPF_NONE:
- default:
- return gsm340_vp_default();
- }
-}
-
-/* determine coding alphabet dependent on GSM 03.38 Section 4 DCS */
-enum sms_alphabet gsm338_get_sms_alphabet(uint8_t dcs)
-{
- uint8_t cgbits = dcs >> 4;
- enum sms_alphabet alpha = DCS_NONE;
-
- if ((cgbits & 0xc) == 0) {
- if (cgbits & 2) {
- LOGP(DSMS, LOGL_NOTICE,
- "Compressed SMS not supported yet\n");
- return 0xffffffff;
- }
-
- switch ((dcs >> 2)&0x03) {
- case 0:
- alpha = DCS_7BIT_DEFAULT;
- break;
- case 1:
- alpha = DCS_8BIT_DATA;
- break;
- case 2:
- alpha = DCS_UCS2;
- break;
- }
- } else if (cgbits == 0xc || cgbits == 0xd)
- alpha = DCS_7BIT_DEFAULT;
- else if (cgbits == 0xe)
- alpha = DCS_UCS2;
- else if (cgbits == 0xf) {
- if (dcs & 4)
- alpha = DCS_8BIT_DATA;
- else
- alpha = DCS_7BIT_DEFAULT;
- }
-
- return alpha;
-}
-
static int gsm340_rx_sms_submit(struct msgb *msg, struct gsm_sms *gsms)
{
if (db_sms_store(gsms) != 0) {
@@ -478,19 +264,11 @@ static int gsm340_rx_sms_submit(struct msgb *msg, struct gsm_sms *gsms)
}
/* generate a TPDU address field compliant with 03.40 sec. 9.1.2.5 */
-static int gsm340_gen_oa(uint8_t *oa, unsigned int oa_len,
+static int gsm340_gen_oa_sub(uint8_t *oa, unsigned int oa_len,
struct gsm_subscriber *subscr)
{
- int len_in_bytes;
-
- oa[1] = 0xb9; /* networks-specific number, private numbering plan */
-
- len_in_bytes = gsm48_encode_bcd_number(oa, oa_len, 1, subscr->extension);
-
- /* GSM 03.40 tells us the length is in 'useful semi-octets' */
- oa[0] = strlen(subscr->extension) & 0xff;
-
- return len_in_bytes;
+ /* network specific, private numbering plan */
+ return gsm340_gen_oa(oa, oa_len, 0x3, 0x9, subscr->extension);
}
/* generate a msgb containing a TPDU derived from struct gsm_sms,
@@ -518,7 +296,7 @@ static int gsm340_gen_tpdu(struct msgb *msg, struct gsm_sms *sms)
*smsp |= 0x40;
/* generate originator address */
- oa_len = gsm340_gen_oa(oa, sizeof(oa), sms->sender);
+ oa_len = gsm340_gen_oa_sub(oa, sizeof(oa), sms->sender);
smsp = msgb_put(msg, oa_len);
memcpy(smsp, oa, oa_len);
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-28 19:31:10 +0000