esp-idf/components/lwip/test_afl_host/test_dns.c
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2020-11-11 07:36:35 +00:00

82 lines
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C

#include "no_warn_host.h"
#include "lwip/opt.h"
#include "lwip/udp.h"
#include "lwip/mem.h"
#include "lwip/memp.h"
#include "lwip/dns.h"
#include "lwip/ip_addr.h"
#include <string.h>
const ip_addr_t ip_addr_any;
const ip_addr_t ip_addr_broadcast;
struct ip_globals ip_data;
struct netif *netif_list;
struct netif mynetif;
ip4_addr_t server_ip;
//
// Dependency injected test functions
void dns_test_dns_recv(void *s, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port);
void dns_test_inject_port_and_txid(int port, int txid);
void dns_test_init_di(void);
err_t dns_test_dns_enqueue(const char *name, size_t hostnamelen, dns_found_callback found, void *callback_arg, u8_t dns_addrtype);
//
// Test starts here
//
int main(int argc, char** argv)
{
uint8_t *buf;
struct pbuf *p;
FILE *file;
size_t len = 1460;
dns_test_init_di();
#ifdef INSTR_IS_OFF
p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
buf = p->payload;
memset(buf, 0, 1460);
if (argc != 2)
{
printf("Non-instrumentation mode: please supply a file name created by AFL to reproduce crash\n");
return 1;
}
//
// Note: parameter1 is a file (mangled packet) which caused the crash
file = fopen(argv[1], "r");
if (file) {
len = fread(buf, 1, 1460, file);
}
fclose(file);
int i;
for (i=0; i<1; i++) {
#else
while (__AFL_LOOP(1000)) {
p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
buf = p->payload;
memset(buf, 0, 1460);
size_t len = read(0, buf, 1460);
#endif
p->len = len;
p->tot_len = len;
p->next = NULL;
// Pretend that the response is from our pending querries
IP4_ADDR(&server_ip, 8, 8, 8, 8);
dns_setserver(0, &server_ip);
dns_test_inject_port_and_txid(1024, (buf[0]<<8) + buf[1]);
dns_test_dns_enqueue("test", 4, NULL, NULL, 0);
// Process the packet
dns_test_dns_recv(NULL, NULL, p, &ip_addr_any, 0);
}
return 0;
}