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smpp: Parse and use SMPP-provided validity period 

Before this patch, we always ignored any SMPP-provided validity period
and used '0' which is now, and means it expires immediately.

As SMPP allows for validity_period of NULL, use 7 days as SMSC default
in such situations.

Change-Id: Iad9f2697f045ed3bc0eb74c3a9730861f82e6c48
Closes: OS#5567
This commit is contained in:
Harald Welte 2022-05-17 18:25:14 +02:00 committed by laforge
parent 53e2e5fe70
commit e6f1160046
6 changed files with 165 additions and 2 deletions
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2
configure.ac
View File

@ -48,6 +48,8 @@ PKG_CHECK_MODULES(LIBOSMOSCCP, libosmo-sccp >= 1.5.0)
PKG_CHECK_MODULES(LIBOSMOMGCPCLIENT, libosmo-mgcp-client >= 1.9.0)
PKG_CHECK_MODULES(LIBOSMOGSUPCLIENT, libosmo-gsup-client >= 1.4.0)
AC_CHECK_FUNC([timegm], [AC_DEFINE(HAVE_TIMEGM, 1, Define if libc implements timegm)])
old_LIBS=$LIBS
AC_SEARCH_LIBS([sctp_send], [sctp], [
AC_DEFINE(HAVE_LIBSCTP, 1, [Define 1 to enable SCTP support])

11
src/libmsc/smpp_openbsc.c
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@ -1,6 +1,6 @@
/* OpenBSC SMPP 3.4 interface, SMSC-side implementation */
/* (C) 2012-2013 by Harald Welte <laforge@gnumonks.org>
/* (C) 2012-2022 by Harald Welte <laforge@gnumonks.org>
*
* All Rights Reserved
*
@ -24,6 +24,7 @@
#include <string.h>
#include <stdint.h>
#include <errno.h>
#include <time.h>
#include <smpp34.h>
#include <smpp34_structs.h>
@ -122,6 +123,8 @@ static int smpp34_submit_tlv_msg_payload(const struct tlv_t *t,
static int submit_to_sms(struct gsm_sms **psms, struct gsm_network *net,
const struct submit_sm_t *submit)
{
time_t t_now = time(NULL);
time_t t_validity_absolute;
const uint8_t *sms_msg = NULL;
unsigned int sms_msg_len = 0;
struct vlr_subscr *dest;
@ -258,6 +261,12 @@ static int submit_to_sms(struct gsm_sms **psms, struct gsm_network *net,
sms->user_data_len = sms_msg_len;
}
t_validity_absolute = smpp_parse_time_format((const char *) submit->validity_period, &t_now);
if (!t_validity_absolute)
sms->validity_minutes = 7 * 24 * 60; /* default: 7 days */
else
sms->validity_minutes = (t_validity_absolute - t_now) / 60;
*psms = sms;
return ESME_ROK;
}

1
src/libmsc/smpp_smsc.h
View File

@ -158,6 +158,7 @@ int smpp_vty_init(void);
int smpp_determine_scheme(uint8_t dcs, uint8_t *data_coding, int *mode);
time_t smpp_parse_time_format(const char *vp, time_t *t_now);
struct gsm_sms;

107
src/libmsc/smpp_utils.c
View File

@ -1,5 +1,5 @@
/* (C) 2012-2013 by Harald Welte <laforge@gnumonks.org>
/* (C) 2012-2022 by Harald Welte <laforge@gnumonks.org>
*
* All Rights Reserved
*
@ -17,6 +17,9 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <time.h>
#include "smpp_smsc.h"
#include <osmocom/core/logging.h>
@ -59,3 +62,105 @@ unknown_mo:
return 0;
}
/* convert a 'struct tm' holding relative time to an absolute one by adding it to t_now */
static void relative2absolute(struct tm *tm, time_t t_now)
{
struct tm tm_now;
localtime_r(&t_now, &tm_now);
tm->tm_year += tm_now.tm_year;
tm->tm_mon += tm_now.tm_mon;
tm->tm_mday += tm_now.tm_mday;
tm->tm_hour += tm_now.tm_hour;
tm->tm_min += tm_now.tm_min;
tm->tm_sec += tm_now.tm_sec;
}
#ifndef HAVE_TIMEGM
/* for systems without a timegm() function, provide a reimplementation */
static time_t timegm(struct tm *tm)
{
const char *orig_tz = getenv("TZ");
time_t ret;
setenv("TZ", "UTC", 1);
ret = mktime(tm);
if (orig_tz)
setenv("TZ", orig_tz, 1);
else
unsetenv("TZ");
return ret;
}
#endif
/*! Parse a SMPP time format as defined in SMPP v3.4 7.1.1.
* \param[in] vp string containing the time as encoded in SMPP v3.4
* \param[in] t_now pointer to a time value for 'now'. Can be NULL, then we call time() ourselves.
* \returns time_t value in seconds since the epoch of the absolute decoded time */
time_t smpp_parse_time_format(const char *vp, time_t *t_now)
{
unsigned int year, month, day, hour, minute, second, tenth, gmt_off_quarter;
char plus_minus_relative;
int gmt_off_minutes;
struct tm tm;
time_t ret;
int rc;
memset(&tm, 0, sizeof(tm));
if (vp[0] == '\0')
return 0;
/* YYMMDDhhmmsstnnp (where p can be -, + or R) */
rc = sscanf(vp, "%2u%2u%2u%2u%2u%2u%1u%2u%c", &year, &month, &day, &hour, &minute,
&second, &tenth, &gmt_off_quarter, &plus_minus_relative);
if (rc != 9)
return (time_t) -1;
tm.tm_year = year;
/* month handling differs between absolute/relative below... */
tm.tm_mday = day;
tm.tm_hour = hour;
tm.tm_min = minute;
tm.tm_sec = second;
tm.tm_isdst = 0;
switch (plus_minus_relative) {
case '+': /* time is in quarter hours advanced compared to UTC */
if (year < 70)
tm.tm_year += 100;
tm.tm_mon = month - 1;
gmt_off_minutes = 15 * gmt_off_quarter;
tm.tm_min -= gmt_off_minutes;
ret = timegm(&tm);
break;
case '-': /* time is in quarter hours retared compared to UTC */
if (year < 70)
tm.tm_year += 100;
tm.tm_mon = month - 1;
gmt_off_minutes = 15 * gmt_off_quarter;
tm.tm_min += gmt_off_minutes;
ret = timegm(&tm);
break;
case 'R':
/* relative time */
tm.tm_mon = month;
if (t_now)
relative2absolute(&tm, *t_now);
else
relative2absolute(&tm, time(NULL));
/* here we do want local time, as we're passing local time in above! */
ret = mktime(&tm);
break;
default:
return (time_t) -1;
}
return ret;
}

38
tests/smpp/smpp_test.c
View File

@ -1,5 +1,6 @@
/*
* (C) 2013 by Holger Hans Peter Freyther
* (C) 2022 by Harald Welte <laforge@osmocom.org>
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
@ -62,6 +63,41 @@ static void test_coding_scheme(void)
}
}
static const char *smpp_time_tests[] = {
"\0",
"220517175524000+",
"220517175524000-",
"220517175524004+", /* 1 hour advanced compared to GMT */
"220517175524004-", /* 1 hour retarded compared to GMT */
"000000010000000R", /* 1 hour */
"000001000000000R", /* 1 day */
};
static void test_smpp_parse_time_format(void)
{
time_t t_now = 1652745600; /* 2022-05-17 00:00:00 UTC */
char *orig_tz;
printf("Testing SMPP time format parser\n");
/* relative time format conversion depends on the local time */
orig_tz = getenv("TZ");
setenv("TZ", "UTC", 1);
for (unsigned int i = 0; i < ARRAY_SIZE(smpp_time_tests); i++) {
time_t t = smpp_parse_time_format(smpp_time_tests[i], &t_now);
char buf[32];
strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", gmtime(&t));
printf("'%s': %ld == %s\n", smpp_time_tests[i], t, buf);
}
if (orig_tz)
setenv("TZ", orig_tz, 1);
else
unsetenv("TZ");
}
static const struct log_info_cat smpp_mirror_default_categories[] = {
[DSMPP] = {
.name = "DSMPP",
@ -85,5 +121,7 @@ int main(int argc, char **argv)
log_set_print_category_hex(osmo_stderr_target, 0);
test_coding_scheme();
test_smpp_parse_time_format();
return EXIT_SUCCESS;
}

8
tests/smpp/smpp_test.ok
View File

@ -1 +1,9 @@
Testing coding scheme support
Testing SMPP time format parser
'': 0 == 1970-01-01 00:00:00
'220517175524000+': 1652810124 == 2022-05-17 17:55:24
'220517175524000-': 1652810124 == 2022-05-17 17:55:24
'220517175524004+': 1652806524 == 2022-05-17 16:55:24
'220517175524004-': 1652813724 == 2022-05-17 18:55:24
'000000010000000R': 1652749200 == 2022-05-17 01:00:00
'000001000000000R': 1652832000 == 2022-05-18 00:00:00