nat: Allow to re-write international numbers in the CC Setup messages
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.
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@ -2,8 +2,8 @@
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* Message rewriting functionality
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*/
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/*
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* (C) 2010-2011 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2010-2011 by On-Waves
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* (C) 2010-2013 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2010-2013 by On-Waves
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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@ -65,18 +65,27 @@ static char *match_and_rewrite_number(void *ctx, const char *number,
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return new_number;
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}
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static char *rewrite_non_international(struct bsc_nat *nat, void *ctx, const char *imsi,
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static char *rewrite_isdn_number(struct bsc_nat *nat, void *ctx, const char *imsi,
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struct gsm_mncc_number *called)
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{
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char *number = called->number;
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if (llist_empty(&nat->num_rewr))
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return NULL;
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/* only ISDN plan */
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if (called->plan != 1)
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return NULL;
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if (called->type == 1)
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return NULL;
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return match_and_rewrite_number(ctx, called->number,
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/* international, prepend */
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if (called->type == 1) {
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char int_number[sizeof(called->number) + 2];
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int_number[0] = '+';
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memcpy(&int_number[1], number, strlen(number) + 1);
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number = int_number;
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}
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return match_and_rewrite_number(ctx, number,
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imsi, &nat->num_rewr);
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}
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@ -110,7 +119,7 @@ static struct msgb *rewrite_setup(struct bsc_nat *nat, struct msgb *msg,
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TLVP_VAL(&tp, GSM48_IE_CALLED_BCD) - 1);
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/* check if it looks international and stop */
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new_number = rewrite_non_international(nat, msg, imsi, &called);
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new_number = rewrite_isdn_number(nat, msg, imsi, &called);
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if (!new_number) {
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LOGP(DNAT, LOGL_DEBUG, "No IMSI match found, returning message.\n");
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@ -150,6 +159,9 @@ static struct msgb *rewrite_setup(struct bsc_nat *nat, struct msgb *msg,
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called.type = 1;
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strncpy(called.number, new_number + 2, sizeof(called.number));
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} else {
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/* rewrite international to unknown */
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if (called.type == 1)
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called.type = 0;
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strncpy(called.number, new_number, sizeof(called.number));
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}
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gsm48_encode_called(out, &called);
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@ -229,6 +229,15 @@ static const uint8_t cc_setup_national_patched[] = {
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0x66, 0xf6, 0x15, 0x02, 0x11, 0x01
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};
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/* patch the phone number of cc_setup_national_patched */
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static const uint8_t cc_setup_national_patched_patched[] = {
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0x00, 0x21, 0xfd, 0x06, 0x01, 0x12,
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0x6d, 0x00, 0x01, 0x1a, 0x01, 0x00, 0x17, 0x03,
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0x05, 0x04, 0x06, 0x60, 0x04, 0x02, 0x00, 0x05,
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0x81, 0x5e, 0x07, 0x91, 0x63, 0x71, 0x32, 0x33,
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0x66, 0xf6, 0x15, 0x02, 0x11, 0x01
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};
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static const uint8_t cc_setup_international[] = {
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0x00, 0x22, 0xfd, 0x06, 0x01, 0x13,
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0xe7, 0x00, 0x01, 0x1b, 0x01, 0x00, 0x18, 0x03,
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@ -236,3 +245,11 @@ static const uint8_t cc_setup_international[] = {
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0x81, 0x5e, 0x08, 0x81, 0x00, 0x94, 0x71, 0x33,
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0x63, 0x66, 0x03, 0x15, 0x02, 0x11, 0x01
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};
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static const uint8_t cc_setup_national_again[] = {
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0x00, 0x22, 0xfd, 0x06, 0x01, 0x12, 0x6d, 0x00,
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0x01, 0x1b, 0x01, 0x00, 0x18, 0x03, 0x05, 0x04,
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0x06, 0x60, 0x04, 0x02, 0x00, 0x05, 0x81, 0x5e,
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0x08, 0x81, 0x63, 0x94, 0x71, 0x32, 0x33, 0x66,
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0xf6, 0x15, 0x02, 0x11, 0x01
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};
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@ -1,8 +1,8 @@
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/*
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* BSC NAT Message filtering
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*
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* (C) 2010-2012 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2010-2012 by On-Waves
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* (C) 2010-2013 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2010-2013 by On-Waves
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*
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* All Rights Reserved
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*
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@ -985,6 +985,62 @@ static void test_setup_rewrite()
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verify_msg(out, cc_setup_national, ARRAY_SIZE(cc_setup_national));
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msgb_free(out);
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/* Now see what happens to an international number */
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entry.mnc = "*";
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entry.option = "^\\+[0-9][0-9]([1-9])";
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entry.text = "0036";
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bsc_nat_num_rewr_entry_adapt(nat, &nat->num_rewr, &entries);
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msg = msgb_alloc(4096, "test_dt_filter");
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copy_to_msg(msg, cc_setup_national_patched, ARRAY_SIZE(cc_setup_national_patched));
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parsed = bsc_nat_parse(msg);
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if (!parsed) {
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printf("FAIL: Could not parse ID resp %d\n", __LINE__);
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abort();
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}
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out = bsc_nat_rewrite_msg(nat, msg, parsed, imsi);
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if (!out) {
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printf("FAIL: A new message should be created %d.\n", __LINE__);
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abort();
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}
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if (msg == out) {
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printf("FAIL: The message should have changed %d\n", __LINE__);
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abort();
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}
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verify_msg(out, cc_setup_national_patched_patched,
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ARRAY_SIZE(cc_setup_national_patched_patched));
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msgb_free(out);
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/* go from international back to national */
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entry.mnc = "*";
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entry.option = "^\\+([0-9])";
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entry.text = "36";
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bsc_nat_num_rewr_entry_adapt(nat, &nat->num_rewr, &entries);
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msg = msgb_alloc(4096, "test_dt_filter");
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copy_to_msg(msg, cc_setup_national_patched, ARRAY_SIZE(cc_setup_national_patched));
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parsed = bsc_nat_parse(msg);
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if (!parsed) {
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printf("FAIL: Could not parse ID resp %d\n", __LINE__);
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abort();
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}
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out = bsc_nat_rewrite_msg(nat, msg, parsed, imsi);
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if (!out) {
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printf("FAIL: A new message should be created %d.\n", __LINE__);
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abort();
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}
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if (msg == out) {
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printf("FAIL: The message should have changed %d\n", __LINE__);
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abort();
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}
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verify_msg(out, cc_setup_national_again,
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ARRAY_SIZE(cc_setup_national_again));
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msgb_free(out);
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}
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static void test_sms_smsc_rewrite()
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