[PATCH] libosmocore[master]: fix bug in parse_cell_id_ci_list()

[Stefan Sperling]

Review at  https://gerrit.osmocom.org/7317

fix bug in parse_cell_id_ci_list()

Cell ID lists with CI were misparsed because parse_cell_id_ci_list()
failed to report the amount of consumed bytes to its caller.

Also add a regression test which uncovered the bug.

Change-Id: Ife4e485e2b86c6f3321c9700611700115ad247b2
Related: OS#2847
---
M src/gsm/gsm0808_utils.c
M tests/gsm0808/gsm0808_test.c
2 files changed, 36 insertions(+), 1 deletion(-)


  git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/17/7317/1

diff --git a/src/gsm/gsm0808_utils.c b/src/gsm/gsm0808_utils.c
index ac1e852..0165e8a 100644
--- a/src/gsm/gsm0808_utils.c
+++ b/src/gsm/gsm0808_utils.c
@@ -756,7 +756,7 @@
                if (i >= GSM0808_CELL_ID_LIST2_MAXLEN)
                        return -ENOSPC;
                cil->id_list[i++].ci = osmo_load16be(ci_be++);
-               consumed += elemlen;
+               *consumed += elemlen;
                remain -= elemlen;
        }
        return i;
diff --git a/tests/gsm0808/gsm0808_test.c b/tests/gsm0808/gsm0808_test.c
index 4da3929..2ce4ab2 100644
--- a/tests/gsm0808/gsm0808_test.c
+++ b/tests/gsm0808/gsm0808_test.c
@@ -920,6 +920,40 @@
        msgb_free(msg);
 }
 
+static void test_gsm0808_enc_dec_cell_id_list_multi_ci()
+{
+       struct gsm0808_cell_id_list2 enc_cil;
+       struct gsm0808_cell_id_list2 dec_cil;
+       struct msgb *msg;
+       uint8_t cil_enc_expected[] = { GSM0808_IE_CELL_IDENTIFIER_LIST, 0x09, 
0x02,
+               0x00, 0x01,
+               0x00, 0x02,
+               0x00, 0x77,
+               0x01, 0xff,
+       };
+       uint8_t rc_enc;
+       int rc_dec;
+
+       memset(&enc_cil, 0, sizeof(enc_cil));
+       enc_cil.id_discr = CELL_IDENT_CI;
+       enc_cil.id_list[0].ci = 1;
+       enc_cil.id_list[1].ci = 2;
+       enc_cil.id_list[2].ci = 119;
+       enc_cil.id_list[3].ci = 511;
+       enc_cil.id_list_len = 4;
+
+       msg = msgb_alloc(1024, "output buffer");
+       rc_enc = gsm0808_enc_cell_id_list2(msg, &enc_cil);
+       OSMO_ASSERT(rc_enc == sizeof(cil_enc_expected));
+       OSMO_ASSERT(memcmp(cil_enc_expected, msg->data, msg->len) == 0);
+
+       rc_dec = gsm0808_dec_cell_id_list2(&dec_cil, msg->data + 2, msg->len - 
2);
+       OSMO_ASSERT(rc_dec == msg->len - 2);
+       OSMO_ASSERT(memcmp(&enc_cil, &dec_cil, sizeof(enc_cil)) == 0);
+
+       msgb_free(msg);
+}
+
 int main(int argc, char **argv)
 {
        printf("Testing generation of GSM0808 messages\n");
@@ -956,6 +990,7 @@
        test_gsm0808_enc_dec_cell_id_list_multi_lac();
        test_gsm0808_enc_dec_cell_id_list_bss();
        test_gsm0808_enc_dec_cell_id_list_multi_lai_and_lac();
+       test_gsm0808_enc_dec_cell_id_list_multi_ci();
 
        printf("Done\n");
        return EXIT_SUCCESS;

-- 
To view, visit https://gerrit.osmocom.org/7317
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Gerrit-MessageType: newchange
Gerrit-Change-Id: Ife4e485e2b86c6f3321c9700611700115ad247b2
Gerrit-PatchSet: 1
Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-Owner: Stefan Sperling <ssperl...@sysmocom.de>