2018-01-20 01:44:56 +01:00
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/* SPDX-License-Identifier: LGPL-2.1+ */
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2019-03-27 11:32:41 +01:00
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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2018-01-20 01:44:56 +01:00
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#include "fuzz.h"
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#include "sd-dhcp-server.c"
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/* stub out network so that the server doesn't send */
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ssize_t sendto(int sockfd, const void *buf, size_t len, int flags, const struct sockaddr *dest_addr, socklen_t addrlen) {
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return len;
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}
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ssize_t sendmsg(int sockfd, const struct msghdr *msg, int flags) {
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return 0;
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}
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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_cleanup_(sd_dhcp_server_unrefp) sd_dhcp_server *server = NULL;
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struct in_addr address = {.s_addr = htobe32(UINT32_C(10) << 24 | UINT32_C(1))};
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static const uint8_t chaddr[] = {3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3};
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uint8_t *client_id;
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DHCPLease *lease;
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int pool_offset;
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if (size < sizeof(DHCPMessage))
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return 0;
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assert_se(sd_dhcp_server_new(&server, 1) >= 0);
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server->fd = open("/dev/null", O_RDWR|O_CLOEXEC|O_NOCTTY);
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assert_se(server->fd >= 0);
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assert_se(sd_dhcp_server_configure_pool(server, &address, 24, 0, 0) >= 0);
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/* add a lease to the pool to expose additional code paths */
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client_id = malloc(2);
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assert_se(client_id);
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client_id[0] = 2;
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client_id[1] = 2;
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lease = new0(DHCPLease, 1);
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assert_se(lease);
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lease->client_id.length = 2;
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lease->client_id.data = client_id;
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lease->address = htobe32(UINT32_C(10) << 24 | UINT32_C(2));
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lease->gateway = htobe32(UINT32_C(10) << 24 | UINT32_C(1));
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lease->expiration = UINT64_MAX;
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memcpy(lease->chaddr, chaddr, 16);
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pool_offset = get_pool_offset(server, lease->address);
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server->bound_leases[pool_offset] = lease;
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assert_se(hashmap_put(server->leases_by_client_id, &lease->client_id, lease) >= 0);
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2018-01-22 01:56:46 +01:00
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(void) dhcp_server_handle_message(server, (DHCPMessage*)data, size);
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2018-01-20 01:44:56 +01:00
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return 0;
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}
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