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nat: Allow to re-write international numbers in the CC Setup messages

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Prepend the international number with a '+' and then do the normal
re-writing on it. There are a couple of ways to handle this:

	\+([0-9]), \+[0-9][0-9]([0-9]), \+49([0-9])

Add a test case for the international re-write based on an already
internationalized number.
This commit is contained in:
Holger Hans Peter Freyther
2013-04-02 12:34:11 +02:00
parent 27b6184225
commit dbd9449a16
3 changed files with 94 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
openbsc/src/osmo-bsc_nat/bsc_nat_rewrite.c
View File

@@ -2,8 +2,8 @@
* Message rewriting functionality
*/
/*
* (C) 2010-2011 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2010-2011 by On-Waves
* (C) 2010-2013 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2010-2013 by On-Waves
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
@@ -65,18 +65,27 @@ static char *match_and_rewrite_number(void *ctx, const char *number,
return new_number;
}
static char *rewrite_non_international(struct bsc_nat *nat, void *ctx, const char *imsi,
static char *rewrite_isdn_number(struct bsc_nat *nat, void *ctx, const char *imsi,
struct gsm_mncc_number *called)
{
char *number = called->number;
if (llist_empty(&nat->num_rewr))
return NULL;
/* only ISDN plan */
if (called->plan != 1)
return NULL;
if (called->type == 1)
return NULL;
return match_and_rewrite_number(ctx, called->number,
/* international, prepend */
if (called->type == 1) {
char int_number[sizeof(called->number) + 2];
int_number[0] = '+';
memcpy(&int_number[1], number, strlen(number) + 1);
number = int_number;
}
return match_and_rewrite_number(ctx, number,
imsi, &nat->num_rewr);
}
@@ -110,7 +119,7 @@ static struct msgb *rewrite_setup(struct bsc_nat *nat, struct msgb *msg,
TLVP_VAL(&tp, GSM48_IE_CALLED_BCD) - 1);
/* check if it looks international and stop */
new_number = rewrite_non_international(nat, msg, imsi, &called);
new_number = rewrite_isdn_number(nat, msg, imsi, &called);
if (!new_number) {
LOGP(DNAT, LOGL_DEBUG, "No IMSI match found, returning message.\n");
@@ -150,6 +159,9 @@ static struct msgb *rewrite_setup(struct bsc_nat *nat, struct msgb *msg,
called.type = 1;
strncpy(called.number, new_number + 2, sizeof(called.number));
} else {
/* rewrite international to unknown */
if (called.type == 1)
called.type = 0;
strncpy(called.number, new_number, sizeof(called.number));
}
gsm48_encode_called(out, &called);

17
openbsc/tests/bsc-nat/bsc_data.c
View File

@@ -229,6 +229,15 @@ static const uint8_t cc_setup_national_patched[] = {
0x66, 0xf6, 0x15, 0x02, 0x11, 0x01
};
/* patch the phone number of cc_setup_national_patched */
static const uint8_t cc_setup_national_patched_patched[] = {
0x00, 0x21, 0xfd, 0x06, 0x01, 0x12,
0x6d, 0x00, 0x01, 0x1a, 0x01, 0x00, 0x17, 0x03,
0x05, 0x04, 0x06, 0x60, 0x04, 0x02, 0x00, 0x05,
0x81, 0x5e, 0x07, 0x91, 0x63, 0x71, 0x32, 0x33,
0x66, 0xf6, 0x15, 0x02, 0x11, 0x01
};
static const uint8_t cc_setup_international[] = {
0x00, 0x22, 0xfd, 0x06, 0x01, 0x13,
0xe7, 0x00, 0x01, 0x1b, 0x01, 0x00, 0x18, 0x03,
@@ -236,3 +245,11 @@ static const uint8_t cc_setup_international[] = {
0x81, 0x5e, 0x08, 0x81, 0x00, 0x94, 0x71, 0x33,
0x63, 0x66, 0x03, 0x15, 0x02, 0x11, 0x01
};
static const uint8_t cc_setup_national_again[] = {
0x00, 0x22, 0xfd, 0x06, 0x01, 0x12, 0x6d, 0x00,
0x01, 0x1b, 0x01, 0x00, 0x18, 0x03, 0x05, 0x04,
0x06, 0x60, 0x04, 0x02, 0x00, 0x05, 0x81, 0x5e,
0x08, 0x81, 0x63, 0x94, 0x71, 0x32, 0x33, 0x66,
0xf6, 0x15, 0x02, 0x11, 0x01
};

60
openbsc/tests/bsc-nat/bsc_nat_test.c
View File

@@ -1,8 +1,8 @@
/*
* BSC NAT Message filtering
*
* (C) 2010-2012 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2010-2012 by On-Waves
* (C) 2010-2013 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2010-2013 by On-Waves
*
* All Rights Reserved
*
@@ -985,6 +985,62 @@ static void test_setup_rewrite()
verify_msg(out, cc_setup_national, ARRAY_SIZE(cc_setup_national));
msgb_free(out);
/* Now see what happens to an international number */
entry.mnc = "*";
entry.option = "^\\+[0-9][0-9]([1-9])";
entry.text = "0036";
bsc_nat_num_rewr_entry_adapt(nat, &nat->num_rewr, &entries);
msg = msgb_alloc(4096, "test_dt_filter");
copy_to_msg(msg, cc_setup_national_patched, ARRAY_SIZE(cc_setup_national_patched));
parsed = bsc_nat_parse(msg);
if (!parsed) {
printf("FAIL: Could not parse ID resp %d\n", __LINE__);
abort();
}
out = bsc_nat_rewrite_msg(nat, msg, parsed, imsi);
if (!out) {
printf("FAIL: A new message should be created %d.\n", __LINE__);
abort();
}
if (msg == out) {
printf("FAIL: The message should have changed %d\n", __LINE__);
abort();
}
verify_msg(out, cc_setup_national_patched_patched,
ARRAY_SIZE(cc_setup_national_patched_patched));
msgb_free(out);
/* go from international back to national */
entry.mnc = "*";
entry.option = "^\\+([0-9])";
entry.text = "36";
bsc_nat_num_rewr_entry_adapt(nat, &nat->num_rewr, &entries);
msg = msgb_alloc(4096, "test_dt_filter");
copy_to_msg(msg, cc_setup_national_patched, ARRAY_SIZE(cc_setup_national_patched));
parsed = bsc_nat_parse(msg);
if (!parsed) {
printf("FAIL: Could not parse ID resp %d\n", __LINE__);
abort();
}
out = bsc_nat_rewrite_msg(nat, msg, parsed, imsi);
if (!out) {
printf("FAIL: A new message should be created %d.\n", __LINE__);
abort();
}
if (msg == out) {
printf("FAIL: The message should have changed %d\n", __LINE__);
abort();
}
verify_msg(out, cc_setup_national_again,
ARRAY_SIZE(cc_setup_national_again));
msgb_free(out);
}
static void test_sms_smsc_rewrite()