From 22611be3d93b58ba96983247d71fa6be57fa0cb0 Mon Sep 17 00:00:00 2001 From: Philipp Date: Wed, 10 Aug 2016 12:08:03 +0200 Subject: SNDCP: add SNDCP-XID encoder/decoder and unit test The SNDCP-XID (or layer-3 xid) is used to exchange layer-3 parameters such as compression. The encoder encodes a bytestream that is then sent as regular XID field from LLC. We will need the SNDCP-XID to negotiate the parameters for our upcomming GPRS data and header compression features Change-Id: If2d63fe2550864cafef3156b1dc0629037c49c1e --- openbsc/tests/Makefile.am | 2 + openbsc/tests/sgsn/Makefile.am | 5 +- openbsc/tests/sndcp_xid/Makefile.am | 20 +++ openbsc/tests/sndcp_xid/sndcp_xid_test.c | 282 ++++++++++++++++++++++++++++++ openbsc/tests/sndcp_xid/sndcp_xid_test.ok | 11 ++ openbsc/tests/testsuite.at | 7 + 6 files changed, 326 insertions(+), 1 deletion(-) create mode 100644 openbsc/tests/sndcp_xid/Makefile.am create mode 100644 openbsc/tests/sndcp_xid/sndcp_xid_test.c create mode 100644 openbsc/tests/sndcp_xid/sndcp_xid_test.ok (limited to 'openbsc/tests') diff --git a/openbsc/tests/Makefile.am b/openbsc/tests/Makefile.am index 7396c52d9..7b145f789 100644 --- a/openbsc/tests/Makefile.am +++ b/openbsc/tests/Makefile.am @@ -10,7 +10,9 @@ SUBDIRS = \ subscr \ mm_auth \ xid \ + sndcp_xid \ $(NULL) + if BUILD_NAT SUBDIRS += \ bsc-nat \ diff --git a/openbsc/tests/sgsn/Makefile.am b/openbsc/tests/sgsn/Makefile.am index d148c4879..cf8810160 100644 --- a/openbsc/tests/sgsn/Makefile.am +++ b/openbsc/tests/sgsn/Makefile.am @@ -56,7 +56,8 @@ sgsn_test_LDADD = \ $(top_builddir)/src/gprs/gprs_gb_parse.o \ $(top_builddir)/src/gprs/oap.o \ $(top_builddir)/src/gprs/oap_messages.o \ - $(top_builddir)/src/gprs/gprs_llc_xid.o \ + $(top_builddir)/src/gprs/gprs_llc_xid.o \ + $(top_builddir)/src/gprs/gprs_sndcp_xid.o \ $(top_builddir)/src/libcommon/libcommon.a \ $(LIBOSMOABIS_LIBS) \ $(LIBOSMOCORE_LIBS) \ @@ -66,7 +67,9 @@ sgsn_test_LDADD = \ $(LIBCRYPTO_LIBS) \ $(LIBGTP_LIBS) \ -lrt \ + -lm \ $(NULL) + if BUILD_IU sgsn_test_LDADD += \ $(top_builddir)/src/libiu/libiu.a \ diff --git a/openbsc/tests/sndcp_xid/Makefile.am b/openbsc/tests/sndcp_xid/Makefile.am new file mode 100644 index 000000000..99b9d1a4f --- /dev/null +++ b/openbsc/tests/sndcp_xid/Makefile.am @@ -0,0 +1,20 @@ +AM_CPPFLAGS = $(all_includes) -I$(top_srcdir)/include +AM_CFLAGS=-Wall -ggdb3 $(LIBOSMOCORE_CFLAGS) $(LIBOSMOGSM_CFLAGS) $(LIBCARES_CFLAGS) + +EXTRA_DIST = sndcp_xid_test.ok + +noinst_PROGRAMS = sndcp_xid_test + +sndcp_xid_test_SOURCES = sndcp_xid_test.c + +sndcp_xid_test_LDADD = \ + $(top_builddir)/src/gprs/gprs_sndcp_xid.o \ + $(LIBOSMOABIS_LIBS) \ + $(LIBOSMOCORE_LIBS) \ + $(LIBOSMOGSM_LIBS) \ + $(LIBOSMOGB_LIBS) \ + $(LIBCARES_LIBS) \ + $(LIBCRYPTO_LIBS) \ + -lgtp -lrt -lm + + diff --git a/openbsc/tests/sndcp_xid/sndcp_xid_test.c b/openbsc/tests/sndcp_xid/sndcp_xid_test.c new file mode 100644 index 000000000..3a3361970 --- /dev/null +++ b/openbsc/tests/sndcp_xid/sndcp_xid_test.c @@ -0,0 +1,282 @@ +/* Test SNDCP-XID Encoding/Decoding */ + +/* (C) 2016 by sysmocom s.f.m.c. GmbH + * All Rights Reserved + * + * Author: Philipp Maier + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see . + */ + +#include +#include + +#include +#include + +#include + +#include +#include + +/* Test SNDCP-XID decoding with a real world sample */ +static void test_xid_decode_realworld(const void *ctx) +{ + struct llist_head *comp_fields; + int rc; + printf("Testing SNDCP XID-Decoder/Encoder (real world data)\n"); + + /* Example of a real world SNDCP-XID message */ + uint8_t xid[] = + { 0x00, 0x01, 0x00, 0x02, 0x31, 0x82, 0x02, 0x27, 0x89, 0xff, 0xe0, + 0x00, 0x0f, 0x00, 0xa8, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x00, 0x02, + 0x01, 0x02, 0x00, 0x03, 0x01, 0x03, 0x00, 0x04, 0x01, 0x04, 0x00, 0x05, + 0x01, 0x05, 0x00, 0x06, 0x00, 0x07, 0x01, 0x07, 0x00, 0x08, 0x01, 0x08, + 0x80, 0x00, 0x04, 0x12, 0x00, 0x40, 0x07 }; + uint8_t xid_r[512]; + + /* Parse and show contained comp fields */ + comp_fields = gprs_sndcp_parse_xid(ctx, xid, sizeof(xid), NULL); + OSMO_ASSERT(comp_fields); + printf("Decoded:\n"); + gprs_sndcp_dump_comp_fields(comp_fields, DSNDCP); + + /* Encode comp-fields again */ + rc = gprs_sndcp_compile_xid(xid_r,sizeof(xid_r), comp_fields); + printf("Result length=%i\n",rc); + printf("Encoded: %s\n", osmo_hexdump_nospc(xid, sizeof(xid))); + printf("Rencoded: %s\n", osmo_hexdump_nospc(xid_r, rc)); + + OSMO_ASSERT(rc == 54); + OSMO_ASSERT(memcmp(xid, xid_r, sizeof(xid)) == 0); + + /* Free comp fields */ + talloc_free(comp_fields); + + printf("\n"); +} + +/* Encode and decode test with artificial test data */ +static void test_xid_encode_decode(const void *ctx) +{ + printf("Testing SNDCP XID-Encoder/Decoder\n"); + + LLIST_HEAD(comp_fields); + struct gprs_sndcp_pcomp_rfc1144_params rfc1144_params; + struct gprs_sndcp_comp_field rfc1144_comp_field; + struct gprs_sndcp_pcomp_rfc2507_params rfc2507_params; + struct gprs_sndcp_comp_field rfc2507_comp_field; + struct gprs_sndcp_pcomp_rohc_params rohc_params; + struct gprs_sndcp_comp_field rohc_comp_field; + struct gprs_sndcp_dcomp_v42bis_params v42bis_params; + struct gprs_sndcp_comp_field v42bis_comp_field; + struct gprs_sndcp_dcomp_v44_params v44_params; + struct gprs_sndcp_comp_field v44_comp_field; + struct llist_head *comp_fields_dec; + + uint8_t xid[512]; + unsigned int xid_len = sizeof(xid); + int rc; + + memset(&rfc1144_comp_field, 0, sizeof(struct gprs_sndcp_comp_field)); + memset(&rfc2507_comp_field, 0, sizeof(struct gprs_sndcp_comp_field)); + memset(&rohc_comp_field, 0, sizeof(struct gprs_sndcp_comp_field)); + memset(&v42bis_comp_field, 0, sizeof(struct gprs_sndcp_comp_field)); + memset(&v44_comp_field, 0, sizeof(struct gprs_sndcp_comp_field)); + + /* Setup which NSAPIs shall make use of rfc1144 */ + rfc1144_params.nsapi[0] = 5; + rfc1144_params.nsapi_len = 1; + + /* Setup rfc1144 operating parameters */ + rfc1144_params.s01 = 7; + + /* Setup rfc1144 compression field */ + rfc1144_comp_field.p = 1; + rfc1144_comp_field.entity = 0; + rfc1144_comp_field.algo = RFC_1144; + rfc1144_comp_field.comp[RFC1144_PCOMP1] = 1; + rfc1144_comp_field.comp[RFC1144_PCOMP2] = 2; + rfc1144_comp_field.comp_len = RFC1144_PCOMP_NUM; + rfc1144_comp_field.rfc1144_params = &rfc1144_params; + + /* Setup which NSAPIs shall make use of rfc1144 */ + rfc2507_params.nsapi[0] = 6; + rfc2507_params.nsapi_len = 1; + + /* Setup rfc2507 operating parameters */ + rfc2507_params.f_max_period = 256; + rfc2507_params.f_max_time = 5; + rfc2507_params.max_header = 168; + rfc2507_params.tcp_space = 15; + rfc2507_params.non_tcp_space = 15; + + /* Setup rfc2507 compression field */ + rfc2507_comp_field.p = 1; + rfc2507_comp_field.entity = 1; + rfc2507_comp_field.algo = RFC_2507; + rfc2507_comp_field.comp[RFC2507_PCOMP1] = 3; + rfc2507_comp_field.comp[RFC2507_PCOMP2] = 4; + rfc2507_comp_field.comp[RFC2507_PCOMP3] = 5; + rfc2507_comp_field.comp[RFC2507_PCOMP4] = 6; + rfc2507_comp_field.comp[RFC2507_PCOMP5] = 7; + rfc2507_comp_field.comp_len = RFC2507_PCOMP_NUM; + rfc2507_comp_field.rfc2507_params = &rfc2507_params; + + /* Setup which NSAPIs shall make use of ROHC */ + rohc_params.nsapi[0] = 5; + rohc_params.nsapi[1] = 6; + rohc_params.nsapi[2] = 7; + rohc_params.nsapi[3] = 8; + rohc_params.nsapi[4] = 9; + rohc_params.nsapi[5] = 10; + rohc_params.nsapi[6] = 11; + rohc_params.nsapi[7] = 12; + rohc_params.nsapi[8] = 13; + rohc_params.nsapi[9] = 14; + rohc_params.nsapi[10] = 15; + rohc_params.nsapi_len = 11; + + /* Setup ROHC operating parameters */ + rohc_params.max_cid = 15; /* default */ + rohc_params.max_header = 168; /* default */ + rohc_params.profile[0] = ROHC_UNCOMPRESSED; + rohc_params.profile[1] = ROHC_RTP; + rohc_params.profile[2] = ROHCV2_RTP; + rohc_params.profile[3] = ROHC_UDP; + rohc_params.profile[4] = ROHCv2_UDP; + rohc_params.profile[5] = ROHC_ESP; + rohc_params.profile[6] = ROHCV2_ESP; + rohc_params.profile[7] = ROHC_IP; + rohc_params.profile[8] = ROHCV2_IP; + rohc_params.profile[9] = ROHC_LLA; + rohc_params.profile[10] = ROHC_LLA_WITH_R_MODE; + rohc_params.profile[11] = ROHC_TCP; + rohc_params.profile[12] = ROHC_RTP_UDP_LITE; + rohc_params.profile[13] = ROHCV2_RTP_UDP_LITE; + rohc_params.profile[14] = ROHC_UDP_LITE; + rohc_params.profile[15] = ROHCV2_UDP_LITE; + rohc_params.profile_len = 16; + + /* Setup ROHC compression field */ + rohc_comp_field.p = 1; + rohc_comp_field.entity = 2; + rohc_comp_field.algo = ROHC; + rohc_comp_field.comp[ROHC_PCOMP1] = 8; + rohc_comp_field.comp[ROHC_PCOMP2] = 9; + rohc_comp_field.comp_len = ROHC_PCOMP_NUM; + rohc_comp_field.rohc_params = &rohc_params; + + /* Setup which NSAPIs shall make use of v42bis */ + v42bis_params.nsapi[0] = 5; + v42bis_params.nsapi_len = 1; + + /* Setup v42bis operating parameters */ + v42bis_params.p0 = 3; + v42bis_params.p1 = 2048; + v42bis_params.p2 = 20; + + /* Setup v42bis compression field */ + v42bis_comp_field.p = 1; + v42bis_comp_field.entity = 3; + v42bis_comp_field.algo = V42BIS; + v42bis_comp_field.comp[V42BIS_DCOMP1] = 10; + v42bis_comp_field.comp_len = V42BIS_DCOMP_NUM; + v42bis_comp_field.v42bis_params = &v42bis_params; + + /* Setup which NSAPIs shall make use of v44 */ + v44_params.nsapi[0] = 5; + v44_params.nsapi_len = 1; + + /* Setup v44 operating parameters */ + v44_params.c0 = 0x80; + v44_params.p0 = 3; + v44_params.p1t = 300; + v44_params.p1r = 300; + v44_params.p3t = 600; + v44_params.p3r = 600; + + /* Setup v44 compression field */ + v44_comp_field.p = 1; + v44_comp_field.entity = 3; + v44_comp_field.algo = V44; + v44_comp_field.comp[V44_DCOMP1] = 10; + v44_comp_field.comp[V44_DCOMP2] = 11; + v44_comp_field.comp_len = V44_DCOMP_NUM; + v44_comp_field.v44_params = &v44_params; + + /* Add compression field(s) to list */ + llist_add(&v44_comp_field.list, &comp_fields); + llist_add(&v42bis_comp_field.list, &comp_fields); + llist_add(&rfc1144_comp_field.list, &comp_fields); + llist_add(&rfc2507_comp_field.list, &comp_fields); + llist_add(&rohc_comp_field.list, &comp_fields); + printf("Test input data:\n"); + gprs_sndcp_dump_comp_fields(&comp_fields, DSNDCP); + + /* Encode SNDCP-XID fields */ + rc = gprs_sndcp_compile_xid(xid, xid_len, &comp_fields); + OSMO_ASSERT(rc > 0); + + printf("Encoded: %s (%i bytes)\n", osmo_hexdump_nospc(xid, rc), rc); + + /* Parse and show contained comp fields */ + comp_fields_dec = gprs_sndcp_parse_xid(ctx, xid, rc, NULL); + OSMO_ASSERT(comp_fields_dec); + + printf("Decoded:\n"); + gprs_sndcp_dump_comp_fields(comp_fields_dec, DSNDCP); + + /* Free comp fields */ + talloc_free(comp_fields_dec); +} + +static struct log_info_cat gprs_categories[] = { + [DSNDCP] = { + .name = "DSNDCP", + .description = + "GPRS Sub-Network Dependent Control Protocol (SNDCP)", + .enabled = 1,.loglevel = LOGL_DEBUG, + } +}; + +static struct log_info info = { + .cat = gprs_categories, + .num_cat = ARRAY_SIZE(gprs_categories), +}; + +int main(int argc, char **argv) +{ + void *xid_ctx; + + osmo_init_logging(&info); + + xid_ctx = talloc_named_const(NULL, 0, "xid_ctx"); + + test_xid_decode_realworld(xid_ctx); + test_xid_encode_decode(xid_ctx); + + printf("Done\n"); + + talloc_report_full(xid_ctx, stderr); + OSMO_ASSERT(talloc_total_blocks(xid_ctx) == 1); + return 0; +} + +/* stubs */ +struct osmo_prim_hdr; +int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) +{ + abort(); +} diff --git a/openbsc/tests/sndcp_xid/sndcp_xid_test.ok b/openbsc/tests/sndcp_xid/sndcp_xid_test.ok new file mode 100644 index 000000000..f3572827c --- /dev/null +++ b/openbsc/tests/sndcp_xid/sndcp_xid_test.ok @@ -0,0 +1,11 @@ +Testing SNDCP XID-Decoder/Encoder (real world data) +Decoded: +Result length=54 +Encoded: 000100023182022789ffe0000f00a8000000010101000201020003010300040104000501050006000701070008010880000412004007 +Rencoded: 000100023182022789ffe0000f00a8000000010101000201020003010300040104000501050006000701070008010880000412004007 + +Testing SNDCP XID-Encoder/Decoder +Test input data: +Encoded: 000100011a83010dab00208003012c012c02580258830007a000200308001402408000041200200781010c3456700040010005a80f000f82022789ffe0000f00a80000000101010002010200030103000401040005010500060007010700080108 (97 bytes) +Decoded: +Done diff --git a/openbsc/tests/testsuite.at b/openbsc/tests/testsuite.at index 6470ab9aa..85a81d6d5 100644 --- a/openbsc/tests/testsuite.at +++ b/openbsc/tests/testsuite.at @@ -129,3 +129,10 @@ AT_KEYWORDS([xid]) cat $abs_srcdir/xid/xid_test.ok > expout AT_CHECK([$abs_top_builddir/tests/xid/xid_test], [], [expout], [ignore]) AT_CLEANUP + +AT_SETUP([sndcp_xid]) +AT_KEYWORDS([sndcp_xid]) +cat $abs_srcdir/sndcp_xid/sndcp_xid_test.ok > expout +AT_CHECK([$abs_top_builddir/tests/sndcp_xid/sndcp_xid_test], [], [expout], [ignore]) +AT_CLEANUP + -- cgit v1.2.3