/* Test v42bis Compression/Decompression */ /* (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 #include #include /* V.42bis compression parameters */ #define P0 3 /* Direction */ #define P1 512 /* Max number of codewords */ #define P2 20 /* Max string length */ /* V.42bis compression buffer size * (Does not affect the compression/decompression result) */ #define MAX_BLOCK_SIZE 1024 /* Compressed sample packets, sniffed from real communication */ #define COMPR_PACKETS_LEN 33 char *compr_packets[] = { /* K800i */ 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"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", "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", "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", "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", "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", "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", "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", /* SGSN with IAXMODEM V.42bis */ "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", "45000101a0e9a54000400683540a0901abc0a800021f904004437442f17a4ab3b1501900ed04900000485454502f312e3020323030204f4b0d0a5365727665723a2053696d706c65485454502f302e3620507974686f6e2f322e372e360d0a446174653a205765642c203301312041756720323031362030393a32373a353520474d540d0a436f6e74656e742d747970653a20746578742f68746d6c3b20636861727365743d5554462d380d0a436f6e74656e742d4c656e6774683a203232320d0a0d0a66003f481c9162e40a97294800002068746d6c20506600588a3c6162644409183200002f5733432f2f4454442048544d4c20332e322046696e616c2f2f454e223e3c68746d6c3e0a3c7469746c653e4469726563746f7279206c697374696e672066016f72202f3c2f7469746c990068beff2823e70c9f816b6a9847af9ebd7bf8f2e9dbc7af5ff142f06bea0cc4e31d7cfced646aa74f03a444fa3373a4c64113634e7ded28554e7d1953cd7e320365744cb811bc8c82078376ff1e00", }; /* Uncompressed sample packets, sniffed from real communication */ #define UNCOMPR_PACKETS_LEN 11 char *uncompr_packets[] = { "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", "4510004046dd40004006a9a7c0a8646ec0a864640017ad8b81980100f3ac984d801800e32a1600000101080a000647de06d1bf5efffd18fffd20fffd23fffd27", "4510005b46de40004006a98bc0a8646ec0a864640017ad8b8198010cf3ac984d801800e3867500000101080a000647df06d1bf61fffb03fffd1ffffd21fffe22fffb05fffa2001fff0fffa2301fff0fffa2701fff0fffa1801fff0", "4510003746df40004006a9aec0a8646ec0a864640017ad8b81980133f3ac989f801800e35fd700000101080a000647e106d1bf63fffd01", "4510003746e040004006a9adc0a8646ec0a864640017ad8b81980136f3ac98a2801800e35fd200000101080a000647e106d1bf64fffb01", "4510007446e140004006a96fc0a8646ec0a864640017ad8b81980139f3ac98a5801800e37b9b00000101080a000647e206d1bf640d0a2d2d2d2d2d2d2d2d2d2d2d2d2d2d2d2d2d2d0d0a57656c6c636f6d6520746f20706f6c6c75780d0a2d2d2d2d2d2d2d2d2d2d2d2d2d2d2d2d2d2d0d0a0d0a", "4510004246e240004006a9a0c0a8646ec0a864640017ad8b81980179f3ac98a5801800e3dab000000101080a000647ec06d1bf6f706f6c6c7578206c6f67696e3a20", 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"450000e2971b40003706026c550d93d7c0a8000200504047217f5922c903759c8018007c4fb400000101080a1153ce39002cf6e8485454502f312e3120333034204e6f74204d6f6469666965640d0a446174653a205475652c2033302041756720323031362031363a33363a343020474d540d0a5365727665723a204170616368650d0a436f6e6e656374696f6e3a204b6565702d416c6976650d0a4b6565702d416c6976653a2074696d656f75743d322c206d61783d313030300d0a455461673a2022346338613134392d3436652d34323736386138656338656330220d0a0d0a", "450000e224f1400037067496550d93d7c0a80002005040489387ebf0c904389f8018007cec5700000101080a1153cf01002cf8fc485454502f312e3120333034204e6f74204d6f6469666965640d0a446174653a205475652c2033302041756720323031362031363a33363a343020474d540d0a5365727665723a204170616368650d0a436f6e6e656374696f6e3a204b6565702d416c6976650d0a4b6565702d416c6976653a2074696d656f75743d322c206d61783d313030300d0a455461673a2022346338613338302d3861362d34323736383761323236383830220d0a0d0a", "450000e2b66140003706e325550d93d7c0a8000200504049fbb679bcc9051ea48018007cebea00000101080a1153cfdc002cfdb4485454502f312e3120333034204e6f74204d6f6469666965640d0a446174653a205475652c2033302041756720323031362031363a33363a343120474d540d0a5365727665723a204170616368650d0a436f6e6e656374696f6e3a204b6565702d416c6976650d0a4b6565702d416c6976653a2074696d656f75743d322c206d61783d313030300d0a455461673a2022346338313336642d3138642d34353832306530393638303430220d0a0d0a", }; /* Calculate IP Header checksum */ static uint16_t calc_ip_csum(uint8_t *data, int len) { int i; uint32_t accumulator = 0; uint16_t *pointer = (uint16_t *) data; for (i = len; i > 1; i -= 2) { accumulator += *pointer; pointer++; } if (len % 2) accumulator += *pointer; accumulator = (accumulator & 0xffff) + ((accumulator >> 16) & 0xffff); accumulator += (accumulator >> 16) & 0xffff; return (~accumulator); } /* Calculate TCP/IP checksum */ static uint16_t calc_tcpip_csum(const void *ctx, uint8_t *packet, int len) { uint8_t *buf; uint16_t csum; buf = talloc_zero_size(ctx, len); memset(buf, 0, len); memcpy(buf, packet + 12, 8); buf[9] = packet[9]; buf[11] = (len - 20) & 0xFF; buf[10] = (len - 20) >> 8 & 0xFF; memcpy(buf + 12, packet + 20, len - 20); csum = calc_ip_csum(buf, len - 20 + 12); talloc_free(buf); return csum; } /* A simple function to show the ascii content of a packet */ void show_packet(uint8_t *packet, int len) { int i; char c; for (i = 0; i < len; i++) { c = packet[i]; if (c >= 0x20 && c <= 0x7E) printf("%c", c); else printf("."); } printf("\n"); } /* A struct to capture the output data of compressor and decompressor */ struct v42bis_output_buffer { uint8_t *buf; uint8_t *buf_pointer; int len; }; /* A simple testpattern generator */ static void gen_test_pattern(uint8_t *data, int len) { int i; for (i = 0; i < len; i++) data[i] = i & 0xF0; } /* Handler to capture the output data from the compressor */ void tx_v42bis_frame_handler(void *user_data, const uint8_t *pkt, int len) { struct v42bis_output_buffer *output_buffer = (struct v42bis_output_buffer *)user_data; memcpy(output_buffer->buf_pointer, pkt, len); output_buffer->buf_pointer += len; output_buffer->len += len; return; } /* Handler to capture the output data from the decompressor */ void tx_v42bis_data_handler(void *user_data, const uint8_t *buf, int len) { /* stub, never used */ OSMO_ASSERT(false); return; } /* Handler to capture the output data from the compressor */ void rx_v42bis_frame_handler(void *user_data, const uint8_t *pkt, int len) { /* stub, never used */ OSMO_ASSERT(false); return; } /* Handler to capture the output data from the decompressor */ void rx_v42bis_data_handler(void *user_data, const uint8_t *buf, int len) { struct v42bis_output_buffer *output_buffer = (struct v42bis_output_buffer *)user_data; memcpy(output_buffer->buf_pointer, buf, len); output_buffer->buf_pointer += len; output_buffer->len += len; return; } /* Test V.42bis compression and decompression */ static void v42bis(const void *ctx, int mode, uint8_t *testvec, int len) { v42bis_state_t *tx_state; v42bis_state_t *rx_state; uint8_t *uncompressed_original; uint8_t *compressed; uint8_t *uncompressed; uncompressed_original = talloc_zero_size(ctx, len); uncompressed = talloc_zero_size(ctx, len); /* Note: We allocate double the size for the compressed buffer, * because in some cases the compression may increase the amount. * of data. */ compressed = talloc_zero_size(ctx, len * 2); int rc; int rc_sum = 0; struct v42bis_output_buffer compressed_data; struct v42bis_output_buffer uncompressed_data; /* Initalize */ tx_state = v42bis_init(ctx, NULL, P0, P1, P2, &tx_v42bis_frame_handler, NULL, MAX_BLOCK_SIZE, &tx_v42bis_data_handler, NULL, MAX_BLOCK_SIZE); OSMO_ASSERT(tx_state); rx_state = v42bis_init(ctx, NULL, P0, P1, P2, &rx_v42bis_frame_handler, NULL, MAX_BLOCK_SIZE, &rx_v42bis_data_handler, NULL, MAX_BLOCK_SIZE); OSMO_ASSERT(rx_state); v42bis_compression_control(tx_state, mode); /* Setup input data */ memcpy(uncompressed_original, testvec, len); /* Run compressor */ compressed_data.buf = compressed; compressed_data.buf_pointer = compressed; compressed_data.len = 0; tx_state->compress.user_data = (&compressed_data); rc = v42bis_compress(tx_state, uncompressed_original, len); printf("v42bis_compress() rc=%d\n", rc); OSMO_ASSERT(rc == 0); rc = v42bis_compress_flush(tx_state); printf("v42bis_compress_flush() rc=%d\n", rc); OSMO_ASSERT(rc == 0); /* Decompress again */ uncompressed_data.buf = uncompressed; uncompressed_data.buf_pointer = uncompressed; uncompressed_data.len = 0; rx_state->decompress.user_data = (&uncompressed_data); rc = v42bis_decompress(rx_state, compressed_data.buf, compressed_data.len); printf("v42bis_decompress() rc=%d\n", rc); rc = v42bis_decompress_flush(rx_state); rc_sum += rc; printf("v42bis_decompress_flush() rc=%d\n", rc); rc_sum += rc; /* Check results */ printf("Mode: %d\n", mode); printf("uncompressed_original= %s ASCII:", osmo_hexdump_nospc(uncompressed_original, len)); show_packet(uncompressed_original, len); printf("uncompressed= %s ASCII:", osmo_hexdump_nospc(uncompressed_data.buf, uncompressed_data.len)); show_packet(uncompressed_data.buf, uncompressed_data.len); printf("compressed= %s ASCII:", osmo_hexdump_nospc(compressed_data.buf, compressed_data.len)); show_packet(compressed_data.buf, compressed_data.len); rc = memcmp(uncompressed, uncompressed_original, len); printf("memcmp() rc=%d\n", rc); rc_sum += rc; OSMO_ASSERT(rc_sum == 0); /* Free buffers and exit */ v42bis_free(tx_state); v42bis_free(rx_state); talloc_free(uncompressed_original); talloc_free(compressed); talloc_free(uncompressed); printf("\n"); } /* Test V.42bis compression and decompression with generated data*/ static void test_v42bis(const void *ctx) { printf("Testing compression/decompression with generated data:\n"); uint8_t testvec[1024]; int len = sizeof(testvec); gen_test_pattern(testvec, len); v42bis(ctx, V42BIS_COMPRESSION_MODE_DYNAMIC, testvec, len); v42bis(ctx, V42BIS_COMPRESSION_MODE_ALWAYS, testvec, len); v42bis(ctx, V42BIS_COMPRESSION_MODE_NEVER, testvec, len); } /* Test V.42bis compression and decompression with some TCP/IP packets */ static void test_v42bis_tcpip(const void *ctx, int packet_id) { uint8_t *testvec; int len; printf ("Testing compression/decompression with realistic TCP/IP packets:\n"); printf("Packet No.: %d\n", packet_id); len = strlen(uncompr_packets[packet_id]); testvec = talloc_zero_size(ctx, len); len = osmo_hexparse(uncompr_packets[packet_id], testvec, len); OSMO_ASSERT(len > 0); v42bis(ctx, V42BIS_COMPRESSION_MODE_DYNAMIC, testvec, len); v42bis(ctx, V42BIS_COMPRESSION_MODE_ALWAYS, testvec, len); v42bis(ctx, V42BIS_COMPRESSION_MODE_NEVER, testvec, len); talloc_free(testvec); } /* Test V.42bis decompression with real, sniffed packets */ static void test_v42bis_tcpip_decompress(const void *ctx, int packet_id) { uint8_t *compressed; int compressed_len; uint8_t *uncompressed; v42bis_state_t *rx_state; int rc; int rc_sum = 0; int len; struct v42bis_output_buffer uncompressed_data; printf ("Testing decompression with sniffed compressed TCP/IP packets:\n"); printf("Packet No.: %d\n", packet_id); len = strlen(compr_packets[packet_id]); uncompressed = talloc_zero_size(ctx, len); compressed = talloc_zero_size(ctx, len); /* Initalize */ rx_state = v42bis_init(ctx, NULL, P0, P1, P2, &rx_v42bis_frame_handler, NULL, MAX_BLOCK_SIZE, &rx_v42bis_data_handler, NULL, MAX_BLOCK_SIZE); OSMO_ASSERT(rx_state); /* Setup input data */ compressed_len = osmo_hexparse(compr_packets[packet_id], compressed, len); /* Decompress */ uncompressed_data.buf = uncompressed; uncompressed_data.buf_pointer = uncompressed; uncompressed_data.len = 0; rx_state->decompress.user_data = (&uncompressed_data); rc = v42bis_decompress_flush(rx_state); printf("v42bis_decompress_flush() rc=%d\n", rc); rc_sum += rc; rc = v42bis_decompress(rx_state, compressed, compressed_len); printf("v42bis_decompress() rc=%d\n", rc); rc_sum += rc; rc = v42bis_decompress_flush(rx_state); printf("v42bis_decompress_flush() rc=%d\n", rc); rc_sum += rc; /* Check results */ printf("compressed= %s ASCII:", osmo_hexdump_nospc(compressed, compressed_len)); show_packet(compressed, compressed_len); printf("uncompressed= %s ASCII:", osmo_hexdump_nospc(uncompressed_data.buf, uncompressed_data.len)); show_packet(uncompressed_data.buf, uncompressed_data.len); OSMO_ASSERT(calc_ip_csum(uncompressed_data.buf, 20) == 0); OSMO_ASSERT(calc_tcpip_csum(ctx, uncompressed_data.buf, uncompressed_data.len) == 0); /* Free buffers and exit */ v42bis_free(rx_state); talloc_free(uncompressed); talloc_free(compressed); printf("\n"); } static struct log_info_cat gprs_categories[] = { [DV42BIS] = { .name = "DV42BIS", .description = "V.42bis data compression (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 *v42bis_ctx; void *log_ctx; int i; v42bis_ctx = talloc_named_const(NULL, 0, "v42bis_ctx"); log_ctx = talloc_named_const(v42bis_ctx, 0, "log"); osmo_init_logging2(log_ctx, &info); test_v42bis(v42bis_ctx); for (i = 0; i < UNCOMPR_PACKETS_LEN; i++) test_v42bis_tcpip(v42bis_ctx, i); for (i = 0; i < COMPR_PACKETS_LEN; i++) test_v42bis_tcpip_decompress(v42bis_ctx, i); printf("Done\n"); talloc_report_full(v42bis_ctx, stderr); talloc_free(log_ctx); OSMO_ASSERT(talloc_total_blocks(v42bis_ctx) == 1); talloc_free(v42bis_ctx); return 0; } /* stubs */ struct osmo_prim_hdr; int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) { abort(); }