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Refactor global var into afl_state_t struct

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This commit is contained in:
Edznux
2020-10-05 22:21:01 +02:00
parent 2bf3a70e2b
commit 916b6fd317
2 changed files with 52 additions and 54 deletions
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99
src/afl-fuzz-statsd.c
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@ -12,47 +12,7 @@
#define MAX_TAG_LEN 200
#define METRIC_PREFIX "fuzzing"
struct sockaddr_in server;
int error = 0;
int statds_sock = 0;
int statsd_socket_init(char *host, int port) {
int sock;
if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1) {
FATAL("Failed to create socket");
}
memset(&server, 0, sizeof(server));
server.sin_family = AF_INET;
server.sin_port = htons(port);
struct addrinfo *result;
struct addrinfo hints;
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_DGRAM;
if ((error = getaddrinfo(host, NULL, &hints, &result))) {
FATAL("Fail to getaddrinfo");
}
memcpy(&(server.sin_addr), &((struct sockaddr_in *)result->ai_addr)->sin_addr,
sizeof(struct in_addr));
freeaddrinfo(result);
return sock;
}
int statsd_send_metric(afl_state_t *afl) {
char buff[MAX_STATSD_PACKET_SIZE] = {0};
int statsd_socket_init(afl_state_t *afl) {
/* Default port and host.
Will be overwritten by AFL_STATSD_PORT and AFL_STATSD_HOST environment
variable, if they exists.
@ -63,14 +23,49 @@ int statsd_send_metric(afl_state_t *afl) {
if (afl->afl_env.afl_statsd_port) { port = atoi(afl->afl_env.afl_statsd_port); }
if (afl->afl_env.afl_statsd_host) { host = afl->afl_env.afl_statsd_host; }
/* statds_sock is a global variable. We set it once in the beginning and reuse
the socket. If the sendto later fail, we reset it to 0 to be able to recreate
it.
*/
if (!statds_sock) {
int sock;
if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1) {
statds_sock = statsd_socket_init(host, port);
if (!statds_sock) {
FATAL("Failed to create socket");
}
memset(&afl->statsd_server, 0, sizeof(afl->statsd_server));
afl->statsd_server.sin_family = AF_INET;
afl->statsd_server.sin_port = htons(port);
struct addrinfo *result;
struct addrinfo hints;
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_DGRAM;
if ((getaddrinfo(host, NULL, &hints, &result))) {
FATAL("Fail to getaddrinfo");
}
memcpy(&(afl->statsd_server.sin_addr), &((struct sockaddr_in *)result->ai_addr)->sin_addr,
sizeof(struct in_addr));
freeaddrinfo(result);
return sock;
}
int statsd_send_metric(afl_state_t *afl) {
char buff[MAX_STATSD_PACKET_SIZE] = {0};
/* afl->statsd_sock is set once in the initialisation of afl-fuzz and reused each time
If the sendto later fail, we reset it to 0 to be able to recreates it.
*/
if (!afl->statsd_sock) {
afl->statsd_sock = statsd_socket_init(afl);
if (!afl->statsd_sock) {
WARNF("Cannot create socket");
return -1;
@ -80,11 +75,11 @@ int statsd_send_metric(afl_state_t *afl) {
}
statsd_format_metric(afl, buff, MAX_STATSD_PACKET_SIZE);
if (sendto(statds_sock, buff, strlen(buff), 0, (struct sockaddr *)&server,
sizeof(server)) == -1) {
if (sendto(afl->statsd_sock, buff, strlen(buff), 0, (struct sockaddr *)&afl->statsd_server,
sizeof(afl->statsd_server)) == -1) {
if (!close(statds_sock)) { perror("Cannot close socket"); }
statds_sock = 0;
if (!close(afl->statsd_sock)) { perror("Cannot close socket"); }
afl->statsd_sock = 0;
WARNF("Cannot sendto");
return -1;