void ns_hexdump_connection(struct ns_connection *nc, const char *path,
int num_bytes, int ev) {
const struct mbuf *io = ev == NS_SEND ? &nc->send_mbuf : &nc->recv_mbuf;
FILE *fp;
char *buf, src[60], dst[60];
int buf_size = num_bytes * 5 + 100;
if ((fp = fopen(path, "a")) != NULL) {
ns_sock_to_str(nc->sock, src, sizeof(src), 3);
ns_sock_to_str(nc->sock, dst, sizeof(dst), 7);
fprintf(fp, "%lu %p %s %s %s %d\n", (unsigned long) time(NULL),
nc->user_data, src,
ev == NS_RECV ? "<-" : ev == NS_SEND ? "->" : ev == NS_ACCEPT
? "<A"
: ev == NS_CONNECT
? "C>"
: "XX",
dst, num_bytes);
if (num_bytes > 0 && (buf = (char *) NS_MALLOC(buf_size)) != NULL) {
ns_hexdump(io->buf + (ev == NS_SEND ? 0 : io->len) -
(ev == NS_SEND ? 0 : num_bytes),
num_bytes, buf, buf_size);
fprintf(fp, "%s", buf);
NS_FREE(buf);
}
fclose(fp);
}
}
static const char *test_hexdump(void) {
const char *src = "\1\2\3\4abcd";
char got[256];
const char *want ="0000 01 02 03 04 61 62 63 64"
" ....abcd\n\n";
ASSERT(ns_hexdump(src, strlen(src), got, sizeof(got)) == (int)strlen(want));
ASSERT(strcmp(got, want) == 0);
return NULL;
}
static void ev_handler(struct ns_connection *nc, int ev, void *p) {
struct ns_mqtt_message *msg = (struct ns_mqtt_message *)p;
(void) nc;
#if 0
if (ev != NS_POLL)
printf("USER HANDLER GOT %d\n", ev);
#endif
switch (ev) {
case NS_CONNECT:
ns_set_protocol_mqtt(nc);
ns_send_mqtt_handshake(nc, "dummy");
break;
case NS_MQTT_CONNACK:
if (msg->connack_ret_code != NS_MQTT_CONNACK_ACCEPTED) {
printf("Got mqtt connection error: %d\n", msg->connack_ret_code);
exit(1);
}
printf("Subscribing to '/stuff'\n");
ns_mqtt_subscribe(nc, topic_expressions, sizeof(topic_expressions)/sizeof(*topic_expressions), 42);
break;
case NS_MQTT_PUBACK:
printf("Message publishing acknowledged (msg_id: %d)\n", msg->message_id);
break;
case NS_MQTT_SUBACK:
printf("Subscription acknowledged, forwarding to '/test'\n");
break;
case NS_MQTT_PUBLISH:
{
#if 0
char hex[1024] = {0};
ns_hexdump(nc->recv_iobuf.buf, msg->payload.len, hex, sizeof(hex));
printf("Got incoming message %s:\n%s", msg->topic, hex);
#else
printf("Got incoming message %s: %.*s\n", msg->topic, (int)msg->payload.len, msg->payload.p);
#endif
printf("Forwarding to /test\n");
ns_mqtt_publish(nc, "/test", 65, NS_MQTT_QOS(0), msg->payload.p, msg->payload.len);
}
break;
case NS_CLOSE:
printf("Connection closed\n");
exit(1);
}
}
