/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #include #include "sd-dhcp-server.c" #include "fuzz.h" ssize_t sendto(int sockfd, const void *buf, size_t len, int flags, const struct sockaddr *dest_addr, socklen_t addrlen) { return len; } ssize_t sendmsg(int sockfd, const struct msghdr *msg, int flags) { return 0; } int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { _cleanup_(sd_dhcp_server_unrefp) sd_dhcp_server *server = NULL; struct in_addr address = {.s_addr = htobe32(UINT32_C(10) << 24 | UINT32_C(1))}; union in_addr_union relay_address; _cleanup_free_ uint8_t *message = NULL; if (size < sizeof(DHCPMessage)) return 0; fuzz_setup_logging(); assert_se(sd_dhcp_server_new(&server, 1) >= 0); assert_se(sd_dhcp_server_attach_event(server, NULL, 0) >= 0); assert_se(sd_dhcp_server_configure_pool(server, &address, 24, 0, 0) >= 0); assert_se(in_addr_from_string(AF_INET, "192.168.5.1", &relay_address) >= 0); assert_se(sd_dhcp_server_set_relay_target(server, &relay_address.in) >= 0); assert_se(sd_dhcp_server_set_bind_to_interface(server, false) >= 0); assert_se(sd_dhcp_server_set_relay_agent_information(server, "string:sample_circuit_id", "string:sample_remote_id") >= 0); size_t buflen = size; buflen += relay_agent_information_length(server->agent_circuit_id, server->agent_remote_id) + 2; assert_se(message = malloc(buflen)); memcpy(message, data, size); server->fd = open("/dev/null", O_RDWR|O_CLOEXEC|O_NOCTTY); assert_se(server->fd >= 0); (void) dhcp_server_relay_message(server, (DHCPMessage *) message, size - sizeof(DHCPMessage), buflen); return 0; }