/* * BIRD Library -- Flow specification (RFC 5575) Tests * * (c) 2016 CZ.NIC z.s.p.o. * * Can be freely distributed and used under the terms of the GNU GPL. */ #include "test/birdtest.h" #include "lib/flowspec.h" #define NET_ADDR_FLOW4_(what,prefix,pxlen,data_) \ do \ { \ what = alloca(sizeof(net_addr_flow4) + 128); \ *what = NET_ADDR_FLOW4(prefix, pxlen, sizeof(data_)); \ memcpy(what->data, &(data_), sizeof(data_)); \ } while(0) #define NET_ADDR_FLOW6_(what,prefix,pxlen,data_) \ do \ { \ what = alloca(sizeof(net_addr_flow6) + 128); \ *what = NET_ADDR_FLOW6(prefix, pxlen, sizeof(data_)); \ memcpy(what->data, &(data_), sizeof(data_)); \ } while(0) static int t_read_length(void) { byte data[] = { 0xcc, 0xcc, 0xcc }; u16 get; u16 expect; for (uint expect = 0; expect < 0xf0; expect++) { *data = expect; get = flow_read_length(data); bt_assert_msg(get == expect, "Testing get length 0x%02x (get 0x%02x)", expect, get); } for (uint expect = 0; expect <= 0xfff; expect++) { put_u16(data, expect | 0xf000); get = flow_read_length(data); bt_assert_msg(get == expect, "Testing get length 0x%03x (get 0x%03x)", expect, get); } return 1; } static int t_write_length(void) { byte data[] = { 0xcc, 0xcc, 0xcc }; uint offset; byte *c; for (uint expect = 0; expect <= 0xfff; expect++) { offset = flow_write_length(data, expect); uint set = (expect < 0xf0) ? *data : (get_u16(data) & 0x0fff); bt_assert_msg(set == expect, "Testing set length 0x%03x (set 0x%03x)", expect, set); bt_assert(offset == (expect < 0xf0 ? 1 : 2)); } return 1; } static int t_first_part(void) { net_addr_flow4 *f; NET_ADDR_FLOW4_(f, ip4_build(10,0,0,1), 24, ((byte[]) { 0x00, 0x00, 0xab })); const byte const *under240 = &f->data[1]; const byte const *above240 = &f->data[2]; /* Case 0x00 0x00 */ bt_assert(flow4_first_part(f) == NULL); /* Case 0x01 0x00 */ f->data[0] = 0x01; bt_assert(flow4_first_part(f) == under240); /* Case 0xef 0x00 */ f->data[0] = 0xef; bt_assert(flow4_first_part(f) == under240); /* Case 0xf0 0x00 */ f->data[0] = 0xf0; bt_assert(flow4_first_part(f) == NULL); /* Case 0xf0 0x01 */ f->data[1] = 0x01; bt_assert(flow4_first_part(f) == above240); /* Case 0xff 0xff */ f->data[0] = 0xff; f->data[1] = 0xff; bt_assert(flow4_first_part(f) == above240); return 1; } static int t_iterators4(void) { net_addr_flow4 *f; NET_ADDR_FLOW4_(f, ip4_build(5,6,7,0), 24, ((byte[]) { 25, /* Length */ FLOW_TYPE_DST_PREFIX, 24, 5, 6, 7, FLOW_TYPE_SRC_PREFIX, 32, 10, 11, 12, 13, FLOW_TYPE_IP_PROTOCOL, 0x81, 0x06, FLOW_TYPE_PORT, 0x03, 0x89, 0x45, 0x8b, 0x91, 0x1f, 0x90, FLOW_TYPE_TCP_FLAGS, 0x80, 0x55, })); const byte *start = f->data; const byte *p1_dst_pfx = &f->data[1]; const byte *p2_src_pfx = &f->data[6]; const byte *p3_ip_proto = &f->data[12]; const byte *p4_port = &f->data[15]; const byte *p5_tcp_flags = &f->data[23]; const byte *end = &f->data[25]; bt_assert(flow_read_length(f->data) == (end-start)); bt_assert(flow4_first_part(f) == p1_dst_pfx); bt_assert(flow4_next_part(p1_dst_pfx, end) == p2_src_pfx); bt_assert(flow4_next_part(p2_src_pfx, end) == p3_ip_proto); bt_assert(flow4_next_part(p3_ip_proto, end) == p4_port); bt_assert(flow4_next_part(p4_port, end) == p5_tcp_flags); bt_assert(flow4_next_part(p5_tcp_flags, end) == NULL); return 1; } static int t_iterators6(void) { net_addr_flow6 *f; NET_ADDR_FLOW6_(f, ip6_build(0,0,0x12345678,0x9a000000), 64, ((byte[]) { 26, /* Length */ FLOW_TYPE_DST_PREFIX, 0x68, 0x40, 0x12, 0x34, 0x56, 0x78, 0x9a, FLOW_TYPE_SRC_PREFIX, 0x08, 0x0, 0xc0, FLOW_TYPE_NEXT_HEADER, 0x81, 0x06, FLOW_TYPE_PORT, 0x03, 0x89, 0x45, 0x8b, 0x91, 0x1f, 0x90, FLOW_TYPE_LABEL, 0x80, 0x55, })); const byte *start = f->data; const byte *p1_dst_pfx = &f->data[1]; const byte *p2_src_pfx = &f->data[9]; const byte *p3_next_header = &f->data[13]; const byte *p4_port = &f->data[16]; const byte *p5_label = &f->data[24]; const byte *end = &f->data[26]; bt_assert(flow_read_length(f->data) == (end-start)); bt_assert(flow6_first_part(f) == p1_dst_pfx); bt_assert(flow6_next_part(p1_dst_pfx, end) == p2_src_pfx); bt_assert(flow6_next_part(p2_src_pfx, end) == p3_next_header); bt_assert(flow6_next_part(p3_next_header, end) == p4_port); bt_assert(flow6_next_part(p4_port, end) == p5_label); bt_assert(flow6_next_part(p5_label, end) == NULL); return 1; } static int t_validation4(void) { enum flow_validated_state res; byte nlri1[] = { FLOW_TYPE_DST_PREFIX, 24, 5, 6, 7, FLOW_TYPE_SRC_PREFIX, 32, 10, 11, 12, 13, FLOW_TYPE_IP_PROTOCOL, 0x81, 0x06, FLOW_TYPE_PORT, 0x03, 0x89, 0x45, 0x8b, 0x91, 0x1f, 0x90, FLOW_TYPE_TCP_FLAGS, 0x80, 0x55, }; /* Isn't included destination prefix */ res = flow4_validate(nlri1, 0); bt_assert(res == FLOW_ST_DEST_PREFIX_REQUIRED); res = flow4_validate(&nlri1[5], sizeof(nlri1)-5); bt_assert(res == FLOW_ST_DEST_PREFIX_REQUIRED); /* Valid / Not Complete testing */ uint valid_sizes[] = {5, 11, 14, 22, 25, 0}; uint valid_idx = 0; for (uint size = 1; size <= sizeof(nlri1); size++) { res = flow4_validate(nlri1, size); bt_debug("size %u, result: %s\n", size, flow_validated_state_str(res)); if (size == valid_sizes[valid_idx]) { valid_idx++; bt_assert(res == FLOW_ST_VALID); } else { bt_assert(res == FLOW_ST_NOT_COMPLETE); } } /* Misc err tests */ struct tset { enum flow_validated_state expect; char *description; u16 size; byte *nlri; }; #define TS(type, msg, data) ((struct tset) {type, msg, sizeof(data), (data)}) struct tset tset[] = { TS( FLOW_ST_EXCEED_MAX_PREFIX_LENGTH, "33-length IPv4 prefix", ((byte []) { FLOW_TYPE_DST_PREFIX, 33, 5, 6, 7, 8, 9 }) ), TS( FLOW_ST_BAD_TYPE_ORDER, "Bad flowspec component type order", ((byte []) { FLOW_TYPE_SRC_PREFIX, 32, 10, 11, 12, 13, FLOW_TYPE_DST_PREFIX, 24, 5, 6, 7, }) ), TS( FLOW_ST_BAD_TYPE_ORDER, "Doubled destination prefix component", ((byte []) { FLOW_TYPE_DST_PREFIX, 24, 5, 6, 7, FLOW_TYPE_DST_PREFIX, 24, 5, 6, 7, }) ), TS( FLOW_ST_AND_BIT_SHOULD_BE_UNSET, "The first numeric operator has set the AND bit", ((byte []) { FLOW_TYPE_PORT, 0x43, 0x89, 0x45, 0x8b, 0x91, 0x1f, 0x90, }) ), TS( FLOW_ST_ZERO_BIT_SHOULD_BE_UNSED, "Set zero bit in operand to one", ((byte []) { FLOW_TYPE_IP_PROTOCOL, 0x89, 0x06, }) ), TS( FLOW_ST_UNKNOWN_COMPONENT, "Unknown component of type number 13", ((byte []) { FLOW_TYPE_DST_PREFIX, 24, 5, 6, 7, FLOW_TYPE_TCP_FLAGS, 0x80, 0x55, 13 /*something new*/, 0x80, 0x55, }) ), }; #undef TS for (uint tcase = 0; tcase < ARRAY_SIZE(tset); tcase++) { res = flow4_validate(tset[tcase].nlri, tset[tcase].size); bt_assert_msg(res == tset[tcase].expect, "Assertion (%s == %s) %s", flow_validated_state_str(res), flow_validated_state_str(tset[tcase].expect), tset[tcase].description); } return 1; } static int t_validation6(void) { enum flow_validated_state res; byte nlri1[] = { FLOW_TYPE_DST_PREFIX, 103, 61, 0x01, 0x12, 0x34, 0x56, 0x78, 0x98, FLOW_TYPE_SRC_PREFIX, 8, 0, 0xc0, FLOW_TYPE_NEXT_HEADER, 0x81, 0x06, FLOW_TYPE_PORT, 0x03, 0x89, 0x45, 0x8b, 0x91, 0x1f, 0x90, FLOW_TYPE_LABEL, 0x80, 0x55, }; /* Isn't included destination prefix */ res = flow6_validate(nlri1, 0); bt_assert(res == FLOW_ST_VALID); /* Valid / Not Complete testing */ uint valid_sizes[] = {0, 9, 13, 16, 24, 27, 0}; uint valid_idx = 0; for (uint size = 0; size <= sizeof(nlri1); size++) { res = flow6_validate(nlri1, size); bt_debug("size %u, result: %s\n", size, flow_validated_state_str(res)); if (size == valid_sizes[valid_idx]) { valid_idx++; bt_assert(res == FLOW_ST_VALID); } else { bt_assert(res == FLOW_ST_NOT_COMPLETE); } } /* Misc err tests */ struct tset { enum flow_validated_state expect; char *description; u16 size; byte *nlri; }; #define TS(type, msg, data) ((struct tset) {type, msg, sizeof(data), (data)}) struct tset tset[] = { TS( FLOW_ST_EXCEED_MAX_PREFIX_LENGTH, "129-length IPv6 prefix", ((byte []) { FLOW_TYPE_DST_PREFIX, 129, 64, 0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0, 0x12 }) ), TS( FLOW_ST_EXCEED_MAX_PREFIX_OFFSET, "Prefix offset is higher than prefix length", ((byte []) { FLOW_TYPE_DST_PREFIX, 48, 64, 0x40, 0x12, 0x34 }) ), TS( FLOW_ST_BAD_TYPE_ORDER, "Bad flowspec component type order", ((byte []) { FLOW_TYPE_NEXT_HEADER, 0x81, 0x06, FLOW_TYPE_SRC_PREFIX, 8, 0, 0xc0, }) ), TS( FLOW_ST_BAD_TYPE_ORDER, "Doubled destination prefix component", ((byte []) { FLOW_TYPE_DST_PREFIX, 103, 61, 0x01, 0x12, 0x34, 0x56, 0x78, 0x98, FLOW_TYPE_DST_PREFIX, 103, 61, 0x01, 0x12, 0x34, 0x56, 0x78, 0x98, }) ), TS( FLOW_ST_AND_BIT_SHOULD_BE_UNSET, "The first numeric operator has set the AND bit", ((byte []) { FLOW_TYPE_PORT, 0x43, 0x89, 0x45, 0x8b, 0x91, 0x1f, 0x90 }) ), TS( FLOW_ST_ZERO_BIT_SHOULD_BE_UNSED, "Set zero bit in operand to one", ((byte []) { FLOW_TYPE_NEXT_HEADER, 0x89, 0x06 }) ), TS( FLOW_ST_VALID, "Component of type number 13 (Label) is well-known in IPv6", ((byte []) { FLOW_TYPE_LABEL, 0x80, 0x55 }) ), TS( FLOW_ST_UNKNOWN_COMPONENT, "Unknown component of type number 14", ((byte []) { FLOW_TYPE_LABEL, 0x80, 0x55, 14 /*something new*/, 0x80, 0x55, }) ) }; #undef TS for (uint tcase = 0; tcase < ARRAY_SIZE(tset); tcase++) { res = flow6_validate(tset[tcase].nlri, tset[tcase].size); bt_assert_msg(res == tset[tcase].expect, "Assertion (%s == %s) %s", flow_validated_state_str(res), flow_validated_state_str(tset[tcase].expect), tset[tcase].description); } return 1; } /* * Builder tests */ static int t_builder4(void) { resource_init(); struct flow_builder *fb = flow_builder_init(&root_pool); linpool *lp = lp_new(&root_pool, 4096); /* Expectation */ static byte nlri[] = { 25, FLOW_TYPE_DST_PREFIX, 24, 5, 6, 7, FLOW_TYPE_SRC_PREFIX, 32, 10, 11, 12, 13, FLOW_TYPE_IP_PROTOCOL, 0x80, 0x06, FLOW_TYPE_PORT, 0x03, 0x89, 0x45, 0x8b, 0x91, 0x1f, 0x90, FLOW_TYPE_TCP_FLAGS, 0x80, 0x55 }; net_addr_flow4 *expect; NET_ADDR_FLOW4_(expect, ip4_build(5, 6, 7, 0), 24, nlri); /* Normal order */ net_addr_ip4 n1; net_fill_ip4((net_addr *) &n1, ip4_build(5,6,7,0), 24); flow_builder_set_type(fb, FLOW_TYPE_DST_PREFIX); flow_builder4_add_pfx(fb, &n1); net_addr_ip4 n2; net_fill_ip4((net_addr *) &n2, ip4_build(10,11,12,13), 32); flow_builder_set_type(fb, FLOW_TYPE_SRC_PREFIX); flow_builder4_add_pfx(fb, &n2); flow_builder_set_type(fb, FLOW_TYPE_IP_PROTOCOL); flow_builder_add_op_val(fb, 0, 0x06); flow_builder_set_type(fb, FLOW_TYPE_PORT); flow_builder_add_op_val(fb, 0x03, 0x89); flow_builder_add_op_val(fb, 0x45, 0x8b); flow_builder_add_op_val(fb, 0x01, 0x1f90); /* Try put a component twice time */ flow_builder_set_type(fb, FLOW_TYPE_IP_PROTOCOL); flow_builder_add_op_val(fb, 0, 0x06); flow_builder_set_type(fb, FLOW_TYPE_TCP_FLAGS); flow_builder_add_op_val(fb, 0, 0x55); net_addr_flow4 *res = flow_builder4_finalize(fb, lp); bt_assert(memcmp(res, expect, expect->length) == 0); /* Reverse order */ flow_builder_clear(fb); flow_builder_set_type(fb, FLOW_TYPE_TCP_FLAGS); flow_builder_add_op_val(fb, 0, 0x55); flow_builder_set_type(fb, FLOW_TYPE_PORT); flow_builder_add_op_val(fb, 0x03, 0x89); flow_builder_add_op_val(fb, 0x45, 0x8b); flow_builder_add_op_val(fb, 0x01, 0x1f90); flow_builder_set_type(fb, FLOW_TYPE_IP_PROTOCOL); flow_builder_add_op_val(fb, 0, 0x06); net_fill_ip4((net_addr *) &n2, ip4_build(10,11,12,13), 32); flow_builder_set_type(fb, FLOW_TYPE_SRC_PREFIX); flow_builder4_add_pfx(fb, &n2); net_fill_ip4((net_addr *) &n1, ip4_build(5,6,7,0), 24); flow_builder_set_type(fb, FLOW_TYPE_DST_PREFIX); flow_builder4_add_pfx(fb, &n1); bt_assert(memcmp(res, expect, expect->length) == 0); return 1; } static int t_builder6(void) { net_addr_ip6 ip; resource_init(); linpool *lp = lp_new(&root_pool, 4096); struct flow_builder *fb = flow_builder_init(&root_pool); fb->ipv6 = 1; /* Expectation */ byte nlri[] = { 27, FLOW_TYPE_DST_PREFIX, 103, 61, 0x01, 0x12, 0x34, 0x56, 0x78, 0x98, FLOW_TYPE_SRC_PREFIX, 8, 0, 0xc0, FLOW_TYPE_NEXT_HEADER, 0x80, 0x06, FLOW_TYPE_PORT, 0x03, 0x89, 0x45, 0x8b, 0x91, 0x1f, 0x90, FLOW_TYPE_LABEL, 0x80, 0x55, }; net_addr_flow6 *expect; NET_ADDR_FLOW6_(expect, ip6_build(0, 1, 0x12345678, 0x98000000), 103, nlri); /* Normal order */ net_fill_ip6((net_addr *) &ip, ip6_build(0, 1, 0x12345678, 0x98000000), 103); flow_builder_set_type(fb, FLOW_TYPE_DST_PREFIX); flow_builder6_add_pfx(fb, &ip, 61); /* Try put a component twice time */ net_fill_ip6((net_addr *) &ip, ip6_build(0, 1, 0x12345678, 0x98000000), 103); flow_builder_set_type(fb, FLOW_TYPE_DST_PREFIX); bt_assert(flow_builder6_add_pfx(fb, &ip, 61) == 0); net_fill_ip6((net_addr *) &ip, ip6_build(0xc0000000,0,0,0), 8); flow_builder_set_type(fb, FLOW_TYPE_SRC_PREFIX); flow_builder6_add_pfx(fb, &ip, 0); flow_builder_set_type(fb, FLOW_TYPE_NEXT_HEADER); flow_builder_add_op_val(fb, 0, 0x06); flow_builder_set_type(fb, FLOW_TYPE_PORT); flow_builder_add_op_val(fb, 0x03, 0x89); flow_builder_add_op_val(fb, 0x45, 0x8b); flow_builder_add_op_val(fb, 0x01, 0x1f90); flow_builder_set_type(fb, FLOW_TYPE_LABEL); flow_builder_add_op_val(fb, 0, 0x55); net_addr_flow6 *res = flow_builder6_finalize(fb, lp); bt_assert(memcmp(res, expect, expect->length) == 0); /* Reverse order */ flow_builder_clear(fb); fb->ipv6 = 1; flow_builder_set_type(fb, FLOW_TYPE_LABEL); flow_builder_add_op_val(fb, 0, 0x55); flow_builder_set_type(fb, FLOW_TYPE_PORT); flow_builder_add_op_val(fb, 0x03, 0x89); flow_builder_add_op_val(fb, 0x45, 0x8b); flow_builder_add_op_val(fb, 0x01, 0x1f90); flow_builder_set_type(fb, FLOW_TYPE_NEXT_HEADER); flow_builder_add_op_val(fb, 0, 0x06); net_fill_ip6((net_addr *) &ip, ip6_build(0xc0000000,0,0,0), 8); flow_builder_set_type(fb, FLOW_TYPE_SRC_PREFIX); flow_builder6_add_pfx(fb, &ip, 0); net_fill_ip6((net_addr *) &ip, ip6_build(0, 1, 0x12345678, 0x98000000), 103); flow_builder_set_type(fb, FLOW_TYPE_DST_PREFIX); flow_builder6_add_pfx(fb, &ip, 61); res = flow_builder6_finalize(fb, lp); bt_assert(memcmp(res, expect, expect->length) == 0); return 1; } static int t_formatting4(void) { char b[1024]; byte nlri[] = { 0, FLOW_TYPE_DST_PREFIX, 0x08, 10, FLOW_TYPE_IP_PROTOCOL, 0x81, 23, FLOW_TYPE_DST_PORT, 0x02, 24, 0x44, 30, 0x03, 40, 0x45, 50, 0x03, 60, 0x45, 70, 0x01, 80, 0xc3, 90, FLOW_TYPE_SRC_PORT, 0x02, 24, 0x44, 0x1e, 0x01, 0x28, 0x01, 0x32, 0x03, 0x3c, 0x45, 0x46, 0x81, 0x50, FLOW_TYPE_ICMP_TYPE, 0x81, 0x50, FLOW_TYPE_ICMP_CODE, 0x81, 0x5a, FLOW_TYPE_TCP_FLAGS, 0x01, 0x03, 0xc2, 0x0c, FLOW_TYPE_PACKET_LENGTH, 0x03, 0, 0xd5, 0xff, 0xff, FLOW_TYPE_DSCP, 0x81, 63, FLOW_TYPE_FRAGMENT, 0x01, 0x01, 0x82, 0x02 }; *nlri = (u8) sizeof(nlri); net_addr_flow4 *input; NET_ADDR_FLOW4_(input, ip4_build(5, 6, 7, 0), 24, nlri); const char *expect = "flow4 { dst 10.0.0.0/8; proto 23; dport > 24 && < 30 || 40..50,60..70,80 && >= 90; sport > 24 && < 30 || 40,50,60..70,80; icmp type 80; icmp code 90; tcp flags 0x3/0x3,0x0/0xc; length 0..65535; dscp 63; fragment dont_fragment || !is_fragment; }"; bt_assert(flow4_net_format(b, sizeof(b), input) == strlen(expect)); bt_debug(" expect: '%s',\n output: '%s'\n", expect, b); bt_assert(strcmp(b, expect) == 0); return 1; } static int t_formatting6(void) { char b[1024]; byte nlri[] = { 0, FLOW_TYPE_DST_PREFIX, 103, 61, 0x01, 0x12, 0x34, 0x56, 0x78, 0x98, FLOW_TYPE_SRC_PREFIX, 8, 0, 0xc0, FLOW_TYPE_NEXT_HEADER, 0x81, 0x06, FLOW_TYPE_PORT, 0x03, 20, 0x45, 40, 0x91, 0x01, 0x11, FLOW_TYPE_LABEL, 0xa0, 0x12, 0x34, 0x56, 0x78, }; *nlri = (u8) sizeof(nlri); net_addr_flow6 *input; NET_ADDR_FLOW6_(input, ip6_build(0, 1, 0x12345678, 0x98000000), 103, nlri); const char *expect = "flow6 { dst ::1:1234:5678:9800:0/103 offset 61; src c000::/8; next header 6; port 20..40,273; label !0x0/0x12345678; }"; bt_assert(flow6_net_format(b, sizeof(b), input) == strlen(expect)); bt_debug(" expect: '%s',\n output: '%s'\n", expect, b); bt_assert(strcmp(b, expect) == 0); return 1; } int main(int argc, char *argv[]) { bt_init(argc, argv); bt_test_suite(t_read_length, "Testing get NLRI length"); bt_test_suite(t_write_length, "Testing set NLRI length"); bt_test_suite(t_first_part, "Searching first part in net_addr_flow"); bt_test_suite(t_iterators4, "Testing iterators (IPv4)"); bt_test_suite(t_iterators6, "Testing iterators (IPv6)"); bt_test_suite(t_validation4, "Testing validation (IPv4)"); bt_test_suite(t_validation6, "Testing validation (IPv6)"); bt_test_suite(t_builder4, "Inserting components into existing Flow Specification (IPv4)"); bt_test_suite(t_builder6, "Inserting components into existing Flow Specification (IPv6)"); bt_test_suite(t_formatting4, "Formatting Flow Specification (IPv4) into text representation"); bt_test_suite(t_formatting6, "Formatting Flow Specification (IPv6) into text representation"); return bt_exit_value(); }