| /* |
| * Copyright (C) 2017-2019 Felix Weinrank |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the project nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <usrsctp.h> |
| #include <openssl/sha.h> |
| #include "../programs/programs_helper.h" |
| |
| #define FUZZ_FAST 1 |
| |
| #ifdef FUZZ_VERBOSE |
| #define fuzzer_printf(...) \ |
| do { \ |
| fprintf(stderr, "[P]"); \ |
| debug_printf_runtime(); \ |
| fprintf(stderr, __VA_ARGS__); \ |
| } while (0) |
| #else |
| #define fuzzer_printf(...) |
| #endif |
| |
| struct sockaddr_conn sconn; |
| struct socket *s_l; |
| |
| static int |
| conn_output(void *addr, void *buf, size_t length, uint8_t tos, uint8_t set_df) |
| { |
| (void) addr; |
| (void) buf; |
| (void) length; |
| (void) tos; |
| (void) set_df; |
| #if 0 |
| char *dump_buf; |
| if ((dump_buf = usrsctp_dumppacket(buf, length, SCTP_DUMP_OUTBOUND)) != NULL) { |
| fprintf(stderr, "%s", dump_buf); |
| usrsctp_freedumpbuffer(dump_buf); |
| } |
| #endif |
| return (0); |
| } |
| |
| static void |
| handle_upcall(struct socket *sock, void *arg, int flgs) |
| { |
| (void) sock; |
| (void) arg; |
| (void) flgs; |
| fuzzer_printf("Listening socket established, implement logic!\n"); |
| exit(EXIT_FAILURE); |
| } |
| |
| int |
| init_fuzzer(void) { |
| static uint8_t initialized = 0; |
| struct sctp_event event; |
| uint16_t event_types[] = { |
| SCTP_ASSOC_CHANGE, |
| SCTP_PEER_ADDR_CHANGE, |
| SCTP_SEND_FAILED_EVENT, |
| SCTP_REMOTE_ERROR, |
| SCTP_SHUTDOWN_EVENT, |
| SCTP_ADAPTATION_INDICATION, |
| SCTP_PARTIAL_DELIVERY_EVENT}; |
| unsigned long i; |
| |
| #if defined(FUZZ_FAST) |
| if (initialized) { |
| return 0; |
| } |
| #endif |
| |
| #ifdef FUZZ_VERBOSE |
| usrsctp_init(0, conn_output, debug_printf_stack); |
| #else |
| usrsctp_init(0, conn_output, NULL); |
| #endif |
| |
| usrsctp_enable_crc32c_offload(); |
| |
| #ifdef SCTP_DEBUG |
| usrsctp_sysctl_set_sctp_debug_on(SCTP_DEBUG_ALL); |
| #endif |
| usrsctp_register_address((void *)1); |
| |
| if ((s_l = usrsctp_socket(AF_CONN, SOCK_STREAM, IPPROTO_SCTP, NULL, NULL, 0, 0)) == NULL) { |
| perror("usrsctp_socket"); |
| exit(EXIT_FAILURE); |
| } |
| usrsctp_set_non_blocking(s_l, 1); |
| |
| /* Bind the server side. */ |
| memset(&sconn, 0, sizeof(struct sockaddr_conn)); |
| sconn.sconn_family = AF_CONN; |
| #ifdef HAVE_SCONN_LEN |
| sconn.sconn_len = sizeof(struct sockaddr_conn); |
| #endif |
| sconn.sconn_port = htons(5001); |
| sconn.sconn_addr = (void *)1; |
| if (usrsctp_bind(s_l, (struct sockaddr *)&sconn, sizeof(struct sockaddr_conn)) < 0) { |
| perror("usrsctp_bind"); |
| exit(EXIT_FAILURE); |
| } |
| |
| memset(&event, 0, sizeof(event)); |
| event.se_assoc_id = SCTP_FUTURE_ASSOC; |
| event.se_on = 1; |
| for (i = 0; i < sizeof(event_types)/sizeof(uint16_t); i++) { |
| event.se_type = event_types[i]; |
| if (usrsctp_setsockopt(s_l, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(event)) < 0) { |
| perror("setsockopt SCTP_EVENT s_l"); |
| exit(EXIT_FAILURE); |
| } |
| } |
| |
| /* Make server side passive... */ |
| if (usrsctp_listen(s_l, 1) < 0) { |
| perror("usrsctp_listen"); |
| exit(EXIT_FAILURE); |
| } |
| |
| usrsctp_set_upcall(s_l, handle_upcall, NULL); |
| |
| initialized = 1; |
| |
| return (0); |
| } |
| |
| int |
| LLVMFuzzerTestOneInput(const uint8_t* data, size_t data_size) |
| { |
| init_fuzzer(); |
| |
| if (data_size < 8 || data_size > 65535) { |
| // Skip too small and too large packets |
| return (0); |
| } |
| usrsctp_conninput((void *)1, data, data_size, 0); |
| |
| #if !defined(FUZZ_FAST) |
| usrsctp_close(s_l); |
| while (usrsctp_finish() != 0) { |
| //sleep(1); |
| } |
| #endif |
| |
| return (0); |
| } |
| |