diff options
| author | Steffen Neubauer <stefreak@stefreak.de> | 2009-11-11 23:02:07 +0900 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2009-11-11 23:02:07 +0900 |
| commit | 5727cf4ea78033b955fadd2525dbe12da486edf6 (patch) | |
| tree | 2223039d9311f059145f832332900367825dfce1 /openbsc/src/gsm_04_11.c | |
| parent | d409be7faecb24640ee55b2be667340b9997775c (diff) | |
[SMS] implement GSM340_TP_VPF_ABSOLUTE
- Added function "gsm340_scts" to decode the service center time stamp
into a UTC/GMT timestamp
- in function gsm340_validity_period: can now decode validity period
format absolute.
Diffstat (limited to 'openbsc/src/gsm_04_11.c')
| -rw-r--r-- | openbsc/src/gsm_04_11.c | 53 |
1 files changed, 50 insertions, 3 deletions
diff --git a/openbsc/src/gsm_04_11.c b/openbsc/src/gsm_04_11.c index 6e59eafe4..f941d90a2 100644 --- a/openbsc/src/gsm_04_11.c +++ b/openbsc/src/gsm_04_11.c @@ -216,10 +216,14 @@ static int gsm411_rp_sendmsg(struct msgb *msg, struct gsm_trans *trans, return gsm411_cp_sendmsg(msg, trans, GSM411_MT_CP_DATA); } +static time_t gsm340_scts(u_int8_t *scts); + static unsigned long gsm340_validity_period(u_int8_t sms_vpf, u_int8_t *sms_vp) { u_int8_t vp; unsigned long minutes; + time_t expires; + time_t now; switch (sms_vpf) { case GSM340_TP_VPF_RELATIVE: @@ -236,8 +240,12 @@ static unsigned long gsm340_validity_period(u_int8_t sms_vpf, u_int8_t *sms_vp) break; case GSM340_TP_VPF_ABSOLUTE: /* Chapter 9.2.3.12.2 */ - /* FIXME: like service center time stamp */ - DEBUGP(DSMS, "VPI absolute not implemented yet\n"); + expires = gsm340_scts(sms_vp); + now = mktime(gmtime(NULL)); + if (expires <= now) + minutes = 0; + else + minutes = (expires-now)/60; break; case GSM340_TP_VPF_ENHANCED: /* Chapter 9.2.3.12.3 */ @@ -317,6 +325,7 @@ static int gsm340_gen_oa(u_int8_t *oa, unsigned int oa_len, return len_in_bytes; } +/* Turn int into semi-octet representation: 98 => 0x89 */ static u_int8_t bcdify(u_int8_t value) { u_int8_t ret; @@ -327,6 +336,21 @@ static u_int8_t bcdify(u_int8_t value) return ret; } +/* Turn semi-octet representation into int: 0x89 => 98 */ +static u_int8_t unbcdify(u_int8_t value) +{ + u_int8_t ret; + + if ((value & 0x0F) > 9 || (value >> 4) > 9) + DEBUGP(DSMS, "unbcdify got too big nibble: 0x%02X\n", value); + + ret = (value&0x0F)*10; + if (ret > 90) + ret += value>>4; + + return ret; +} + /* Generate 03.40 TP-SCTS */ static void gsm340_gen_scts(u_int8_t *scts, time_t time) { @@ -338,7 +362,30 @@ static void gsm340_gen_scts(u_int8_t *scts, time_t time) *scts++ = bcdify(tm->tm_hour); *scts++ = bcdify(tm->tm_min); *scts++ = bcdify(tm->tm_sec); - *scts++ = 0; /* FIXME: timezone */ + *scts++ = bcdify(tm->tm_gmtoff/(60*15)); +} + +/* Decode 03.40 TP-SCTS (into utc/gmt timestamp) */ +static time_t gsm340_scts(u_int8_t *scts) +{ + struct tm tm; + + u_int8_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" */ + tm.tm_gmtoff = unbcdify(*scts++) * 15*60; + + return mktime(&tm); } /* generate a msgb containing a TPDU derived from struct gsm_sms, |