could not connect to server on Win10

[CodingMan]

I wrote a server and a client in local by example, but client always show "could not connect to server".

[rxi]

Would you be able to provide the code to an example program which demonstrates this behaviour? Thanks.

[CodingMan]

OK here is the code of server.

#include <stdlib.h>
#include "dyad.h"

static void onData(dyad_Event *e) {
	dyad_write(e->stream, e->data, e->size);
}

static void onAccept(dyad_Event *e) {
	dyad_addListener(e->remote, DYAD_EVENT_DATA, onData, NULL);
	dyad_writef(e->remote, "Echo server\r\n");
}

static void onListen(dyad_Event *e) {
	printf("listen: %s\n", e->msg);
}

int main(void) {
	dyad_init();

	dyad_Stream *serv = dyad_newStream();
	dyad_addListener(serv, DYAD_EVENT_ACCEPT, onAccept, NULL);
	dyad_addListener(serv, DYAD_EVENT_DATA, onData, NULL);
	dyad_addListener(serv, DYAD_EVENT_LISTEN, onListen, NULL);
	dyad_listen(serv, 8800);

	while (dyad_getStreamCount() > 0) {
		dyad_update();
	}

	dyad_shutdown();
	return 0;
}

then, the following code is client.

#include <stdlib.h>
#include "dyad.h"

static void onConnect(dyad_Event *e) {
	printf("connected: %s\n", e->msg);
}

static void onData(dyad_Event *e) {
	printf("%s", e->data);
}

static void onError(dyad_Event *e) {
	printf("error: %s\n", e->msg);
}

static void onTimeout(dyad_Event *e) {
	printf("timeout: %s\n", e->msg);
}

int main(void) {
	dyad_init();

	dyad_Stream *s = dyad_newStream();
	dyad_addListener(s, DYAD_EVENT_CONNECT, onConnect, NULL);
	dyad_addListener(s, DYAD_EVENT_DATA, onData, NULL);
	dyad_addListener(s, DYAD_EVENT_ERROR, onError, NULL);
	dyad_addListener(s, DYAD_EVENT_TIMEOUT, onTimeout, NULL);
	//dyad_connect(s, "time-nw.nist.gov", 13);
	dyad_connect(s, "127.0.0.1", 8800);

	while (dyad_getStreamCount() > 0) {
		dyad_update();
	}

	dyad_shutdown();
	return 0;
}

[karl2016]

int dyad_listenEx(
dyad_Stream *stream, const char *host, int port, int backlog
) {
struct addrinfo hints, *ai = NULL;
int err, optval;
char buf[64];
dyad_Event e;

/* Get addrinfo */
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;

because dyad_listenEx ai_family is AF_UNSPEC, socket addr may format to ip_v6. so ipv4 addr "127.0.0.1" cannot connect it.
solution: change hint.ai_family to AF_INET both in function "dyad_listenEx" and "dyad_connect", connect "127.0.0.1" will be work .

[GRASBOCK]

@karl2016 It worked for me, but wouldn't that prevent you from using the ipv6? Also for some reason, when i used the ipv6 address i found using my ipconfig command in the commandline it said , that it couldn't resolve the host (before i changed it to AF_INET)