Public release of the cellmgr_ng code to convert E1 to IPA SCCP

2 files changed, 287 insertions, 0 deletions

diff --git a/tests/patching/Makefile.am b/tests/patching/Makefile.am
new file mode 100644
index 0000000..d99a55a
--- /dev/null
+++ b/tests/patching/Makefile.am
@@ -0,0 +1,8 @@
+INCLUDES = $(all_includes) -I$(top_srcdir)/include $(LAFORGE_CFLAGS) -Wall
+noinst_PROGRAMS = patching_test
+
+patching_test_SOURCES = patching_test.c $(top_srcdir)/src/bss_patch.c \
+                        $(top_srcdir)/src/openbsc_nat/tlv_parser.c \
+                        $(top_srcdir)/src/openbsc_nat/bssap.c
+patching_test_LDADD = $(LAFORGE_LIBS) $(SCCP_LIBS)
+
diff --git a/tests/patching/patching_test.c b/tests/patching/patching_test.c
new file mode 100644
index 0000000..8bd0d17
--- /dev/null
+++ b/tests/patching/patching_test.c
@@ -0,0 +1,279 @@
+#include <bss_patch.h>
+
+#include <laf0rge1/debug.h>
+
+#include <stdio.h>
+#include <string.h>
+
+u_int8_t pkt125[] = {
+0x06, 0x01, 0x04, 
+0x00, 0x00, 0x01, 0x0b, 0x00, 0x09, 0x01, 0x0b, 
+0x03, 0x01, 0x0b, 0x25, 0x01, 0x00, 0x02 };
+
+u_int8_t pkt125_res[] = {
+0x06, 0x01, 0x04, 
+0x00, 0x00, 0x01, 0x0b, 0x00, 0x09, 0x01, 0x0b, 
+0x03, 0x01, 0x0a, 0x11, 0x01, 0x00, 0x02 };
+
+u_int8_t pkt28[] = {
+0x06, 0x01, 0x05,
+0x2b, 0x00, 0x01, 0x09, 0x00, 0x07, 0x02, 0x21,
+0x08, 0x2c, 0x02, 0x40, 0x11 };
+u_int8_t pkt28_res[] = {
+0x06, 0x01, 0x05,
+0x2b, 0x00, 0x01, 0x09, 0x00, 0x07, 0x02, 0x21,
+0x09, 0x2c, 0x02, 0x40, 0x25 };
+
+u_int8_t reset_ack[] = {
+0x09, 0x00, 0x03,
+0x07, 0x0b, 0x04, 0x43, 0x0a, 0x00, 0xfe, 0x04,
+0x43, 0x5c, 0x00, 0xfe, 0x03, 0x00, 0x01, 0x31 };
+
+u_int8_t cc[] = {
+0x02, 0x01, 0x04, 
+0x00, 0x01, 0x01, 0xb4, 0x02, 0x01, 0x00 };
+
+
+struct result {
+	u_int8_t *input;
+	int	  inp_len;
+	const u_int8_t *expected;
+	int       exp_len;
+	int	  result;
+};
+
+
+static struct result results[] = {
+	{
+		.input = pkt125,
+		.inp_len = sizeof(pkt125),
+		.expected = pkt125_res,
+		.exp_len = sizeof(pkt125),
+	},
+
+	{
+		.input = pkt28,
+		.inp_len = sizeof(pkt28),
+		.expected = pkt28_res,
+		.exp_len = sizeof(pkt28_res),
+	},
+
+	{
+		.input = reset_ack,
+		.inp_len = sizeof(reset_ack),
+		.expected = reset_ack,
+		.exp_len = sizeof(reset_ack),
+		.result = BSS_FILTER_RESET_ACK,
+	},
+
+	{
+		.input = cc,
+		.inp_len = sizeof(cc),
+		.expected = cc,
+		.exp_len = sizeof(cc),
+		.result = 0,
+	},
+};
+
+static u_int8_t udt_with_poi[] = {
+0x09, 0x00, 0x03,
+0x07, 0x0b, 0x04, 0x43, 0x0a, 0x00, 0xfe, 0x04,
+0x43, 0x5c, 0x00, 0xfe, 0x10, 0x00, 0x0e, 0x44,
+0x04, 0x01, 0x00, 0x01, 0x00, 0x01, 0x1e, 0x05,
+0x1e, 0x00, 0x00, 0x00, 0x40 };
+
+static const u_int8_t udt_without_poi[] = {
+0x09, 0x00, 0x03,
+0x05, 0x07, 0x02, 0x42, 0xfe,
+            0x02, 0x42, 0xfe,
+0x10, 0x00, 0x0e, 0x44,
+0x04, 0x01, 0x00, 0x01, 0x00, 0x01, 0x1e, 0x05,
+0x1e, 0x00, 0x00, 0x00, 0x40 };
+
+static u_int8_t cr_with_poi [] = {
+0x01, 0x01, 0x04,
+0x00, 0x02, 0x02, 0x06, 0x04, 0xc3, 0x5c, 0x00,
+0xfe, 0x0f, 0x21, 0x00, 0x1f, 0x57, 0x05, 0x08,
+0x00, 0x72, 0xf4, 0x80, 0x23, 0x29, 0xc3, 0x50,
+0x17, 0x10, 0x05, 0x24, 0x11, 0x03, 0x33, 0x19,
+0x81, 0x08, 0x29, 0x47, 0x80, 0x00, 0x00, 0x00,
+0x00, 0x80, 0x21, 0x01, 0x00 };
+
+static const u_int8_t cr_without_poi [] = {
+0x01, 0x01, 0x04,
+0x00, 0x02, 0x02, 0x04, 0x02, 0x42, 0xfe,
+0x0f, 0x21, 0x00, 0x1f, 0x57, 0x05, 0x08,
+0x00, 0x72, 0xf4, 0x80, 0x23, 0x29, 0xc3, 0x50,
+0x17, 0x10, 0x05, 0x24, 0x11, 0x03, 0x33, 0x19,
+0x81, 0x08, 0x29, 0x47, 0x80, 0x00, 0x00, 0x00,
+0x00, 0x80, 0x21, 0x01, 0x00 };
+
+static u_int8_t cr2_without_poi[] = {
+0x01, 0x00, 0x00, 0x03, 0x02, 0x02, 0x04, 0x02,
+0x42, 0xfe, 0x0f, 0x1f, 0x00, 0x1d, 0x57, 0x05,
+0x08, 0x00, 0x72, 0xf4, 0x80, 0x20, 0x1d, 0xc3,
+0x50, 0x17, 0x10, 0x05, 0x24, 0x31, 0x03, 0x50,
+0x18, 0x93, 0x08, 0x29, 0x47, 0x80, 0x00, 0x00,
+0x00, 0x00, 0x80, 0x00};
+
+static struct result rewrite_results_to_msc[] = {
+	{
+		.input = udt_with_poi,
+		.inp_len = sizeof(udt_with_poi),
+		.expected = udt_without_poi,
+		.exp_len = sizeof(udt_without_poi),
+	},
+
+	{
+		.input = cr_with_poi,
+		.inp_len = sizeof(cr_with_poi),
+		.expected = cr_without_poi,
+		.exp_len = sizeof(cr_without_poi),
+	},
+
+	{
+		.input = cr2_without_poi,
+		.inp_len = sizeof(cr2_without_poi),
+		.expected = cr2_without_poi,
+		.exp_len = sizeof(cr2_without_poi),
+	},
+};
+
+
+u_int8_t paging_cmd[] = {
+	0x09, 0x00, 0x03,  0x07, 0x0b, 0x04, 0x43, 0x0a,
+	0x00, 0xfe, 0x04,  0x43, 0x5c, 0x00, 0xfe, 0x10,
+	0x00, 0x0e, 0x52,  0x08, 0x08, 0x29, 0x80, 0x10,
+	0x76, 0x10, 0x77,  0x46, 0x05, 0x1a, 0x01, 0x06 };
+u_int8_t paging_cmd_patched[] = {
+	0x09, 0x00, 0x03,  0x07, 0x0b, 0x04, 0x43, 0x02,
+	0x00, 0xfe, 0x04,  0x43, 0x01, 0x00, 0xfe, 0x10,
+	0x00, 0x0e, 0x52,  0x08, 0x08, 0x29, 0x80, 0x10,
+	0x76, 0x10, 0x77,  0x46, 0x05, 0x1a, 0x01, 0x06 };
+
+static struct result rewrite_results_to_bsc[] = {
+	{
+		.input = paging_cmd,
+		.inp_len = sizeof(paging_cmd),
+		.expected = paging_cmd_patched,
+		.exp_len = sizeof(paging_cmd_patched),
+	},
+};
+
+static void test_patch_filter(void)
+{
+	int i;
+
+	printf("Testing patching of GSM messages to the MSC.\n");
+
+	for (i = 0; i < sizeof(results)/sizeof(results[0]); ++i) {
+		struct sccp_parse_result result;
+		struct msgb *msg;
+		int rc;
+
+		msg = msgb_alloc_headroom(256, 8, "test");
+		msgb_put(msg, 1);
+		msg->l2h = msgb_put(msg, results[i].inp_len);
+		memcpy(msg->l2h, results[i].input, msgb_l2len(msg));
+		rc = bss_patch_filter_msg(msg, &result);
+
+		if (memcmp(msg->l2h, results[i].expected, results[i].exp_len) != 0) {
+			printf("Failed to patch the packet.\n");
+			abort();
+		}
+		if (rc != results[i].result) {
+			printf("Didn't get the result we wanted on %d\n", i),
+			abort();
+		}
+
+		msgb_free(msg);
+	}
+}
+
+static void test_rewrite_msc(void)
+{
+	int i;
+
+	printf("Testing rewriting the SCCP header.\n");
+	for (i = 0; i < sizeof(rewrite_results_to_msc)/sizeof(rewrite_results_to_msc[0]); ++i) {
+		struct sccp_parse_result result;
+		struct msgb *inp;
+		struct msgb *outp;
+		int rc;
+
+		outp = msgb_alloc_headroom(256, 8, "test2");
+		inp = msgb_alloc_headroom(256, 8, "test1");
+		msgb_put(inp, 1);
+		inp->l2h = msgb_put(inp, rewrite_results_to_msc[i].inp_len);
+		memcpy(inp->l2h, rewrite_results_to_msc[i].input, msgb_l2len(inp));
+
+		rc = bss_patch_filter_msg(inp, &result);
+		if (rc < 0) {
+			printf("Failed to parse header msg: %d\n", i);
+			abort();
+		}
+
+		bss_rewrite_header_for_msc(rc, outp, inp, &result);
+
+		memset(&result, 0, sizeof(result));
+		rc = bss_patch_filter_msg(outp, &result);
+		if (rc < 0) {
+			printf("Patched message doesn't work: %d\n", i);
+			printf("hex: %s\n", hexdump(outp->l2h, msgb_l2len(outp)));
+			abort();
+		}
+
+		if (msgb_l2len(outp) != rewrite_results_to_msc[i].exp_len) {
+			printf("The length's don#t match on %d %u != %u\n",
+				i, msgb_l2len(outp), rewrite_results_to_msc[i].exp_len);
+			printf("hex: %s\n", hexdump(outp->l2h, msgb_l2len(outp)));
+			abort();
+		}
+
+		if (memcmp(outp->l2h, rewrite_results_to_msc[i].expected, rewrite_results_to_msc[i].exp_len) != 0) {
+			printf("Expected results don't match for: %d\n", i);
+			printf("hex: %s\n", hexdump(outp->l2h, msgb_l2len(outp)));
+			abort();
+		}
+
+		msgb_free(outp);
+		msgb_free(inp);
+	}
+}
+
+static void test_rewrite_bsc(void)
+{
+	int i;
+
+	printf("Testing rewriting the SCCP header for BSC.\n");
+	for (i = 0; i < sizeof(rewrite_results_to_bsc)/sizeof(rewrite_results_to_bsc[0]); ++i) {
+		struct msgb *inp;
+
+		inp = msgb_alloc_headroom(256, 8, "test1");
+		msgb_put(inp, 1);
+		inp->l2h = msgb_put(inp, rewrite_results_to_bsc[i].inp_len);
+		memcpy(inp->l2h, rewrite_results_to_bsc[i].input, msgb_l2len(inp));
+
+		if (bss_rewrite_header_to_bsc(inp, 1, 2) != 0) {
+			fprintf(stderr, "Failed to rewrite header\n");
+			abort();
+		}
+
+		if (memcmp(inp->l2h, rewrite_results_to_bsc[i].expected, msgb_l2len(inp))!= 0) {
+			fprintf(stderr, "Content does not match\n");
+			printf("got: %s\n", hexdump(inp->l2h, msgb_l2len(inp)));
+			abort();
+		}
+
+		msgb_free(inp);
+	}
+}
+
+int main(int argc, char **argv)
+{
+	test_patch_filter();
+	test_rewrite_msc();
+	test_rewrite_bsc();
+	printf("DONE!\n");
+	return 0;
+}