80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/* Copyright 2021 Google LLC
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#ifndef FUZZ_H
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#define FUZZ_H
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#include <sys/types.h>
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#include <sys/socket.h>
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// Forward declared because we want to use FuzzedDataProvider,
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// which requires CPP.
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extern ssize_t fuzz_get_random_data(void *buf, size_t len);
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ssize_t fuzz_recv(int sockfd, void *buf, size_t len, int flags){
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return fuzz_get_random_data(buf, len);
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}
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ssize_t fuzz_read(int sockfd, void *buf, size_t len){
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return fuzz_get_random_data(buf, len);
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}
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ssize_t fuzz_write(int fd, const void *buf, size_t count) {
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return count;
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}
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int fuzz_isatty(int fd) {
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return 1;
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}
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char *fuzz_fgets(char *s, int size, FILE *stream) {
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ssize_t v = fuzz_get_random_data(s, size-1);
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// We use fgets to get trusted input. As such, assume we have
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// an ascii printable char at the beginning.
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printf("Calling into fgets\n");
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if (s[0] <= 0x21 || s[0] >= 0x7f) {
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s[0] = 'A';
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}
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s[size-1] = '\0';
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return s;
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}
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int fuzz_select(int nfds, fd_set *readfds, fd_set *writefds,fd_set *exceptfds, struct timeval *timeout) {
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char val;
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ssize_t c = fuzz_get_random_data(&val, 1);
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return c;
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}
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ssize_t fuzz_send(int sockfd, const void *buf, size_t len, int flags) {
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return len;
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}
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FILE *fp_p = NULL;
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FILE *fuzz_fopen(const char *pathname, const char *mode) {
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if (mode == NULL) return fp_p;
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return fp_p;
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}
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int fuzz_fclose(FILE *stream) {
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if (stream == NULL) return 1;
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return 2;
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}
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size_t fuzz_sendto(int sockfd, void *buf, size_t len, int flags, struct sockaddr *dest_addr, socklen_t addrlen) {
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if (buf == NULL) {
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return len;
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}
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return len;
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}
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#endif
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