Exemplo n.º 1
0
int udp_tx(void *context, const unsigned char *buf, size_t size)
{
	struct udp_context *ctx = context;
	struct net_context *net_ctx;
	struct net_pkt *send_pkt;

	int rc, len;

	net_ctx = ctx->net_ctx;

	send_pkt = net_pkt_get_tx(net_ctx, K_FOREVER);
	if (!send_pkt) {
		printk("cannot create pkt\n");
		return -EIO;
	}

	rc = net_pkt_append_all(send_pkt, size, (u8_t *) buf, K_FOREVER);
	if (!rc) {
		printk("cannot write buf\n");
		return -EIO;
	}

	len = net_pkt_get_len(send_pkt);

	rc = net_context_sendto(send_pkt, &net_ctx->remote,
				addrlen, NULL, K_FOREVER, NULL, NULL);

	if (rc < 0) {
		printk("Cannot send data to peer (%d)\n", rc);
		net_pkt_unref(send_pkt);
		return -EIO;
	} else {
		return len;
	}
}
Exemplo n.º 2
0
/* Send encrypted data */
static int ssl_tx(void *context, const unsigned char *buf, size_t size)
{
	struct http_client_ctx *ctx = context;
	struct net_pkt *send_pkt;
	int ret, len;

	send_pkt = net_pkt_get_tx(ctx->tcp.ctx, BUF_ALLOC_TIMEOUT);
	if (!send_pkt) {
		return MBEDTLS_ERR_SSL_ALLOC_FAILED;
	}

	ret = net_pkt_append_all(send_pkt, size, (u8_t *)buf,
				 BUF_ALLOC_TIMEOUT);
	if (!ret) {
		/* Cannot append data */
		net_pkt_unref(send_pkt);
		return MBEDTLS_ERR_SSL_ALLOC_FAILED;
	}

	len = size;

	ret = net_context_send(send_pkt, ssl_sent, K_NO_WAIT, NULL, ctx);
	if (ret < 0) {
		net_pkt_unref(send_pkt);
		return ret;
	}

	k_sem_take(&ctx->https.mbedtls.ssl_ctx.tx_sem, K_FOREVER);

	return len;
}
Exemplo n.º 3
0
static int telnet_setup_out_pkt(struct net_context *client)
{
	out_pkt = net_pkt_get_tx(client, K_FOREVER);
	if (!out_pkt) {
		/* Cannot happen atm, net_pkt waits indefinitely */
		return -ENOBUFS;
	}

	return 0;
}
Exemplo n.º 4
0
static int transmitv(struct net_context *conn, int iovcnt,
		     struct io_vec *iov)
{
	struct net_pkt *pkt;
	int i;

	pkt = net_pkt_get_tx(conn, K_FOREVER);
	if (!pkt) {
		return -ENOMEM;
	}

	for (i = 0; i < iovcnt; i++) {
		if (!net_pkt_append_all(pkt, iov[i].len, iov[i].base,
					K_FOREVER)) {
			net_pkt_unref(pkt);

			return -ENOMEM;
		}
	}

	return net_context_send(pkt, NULL, K_NO_WAIT, NULL, NULL);
}
Exemplo n.º 5
0
static struct net_pkt *build_reply_pkt(const char *name,
				       struct net_context *context,
				       struct net_pkt *pkt)
{
	struct net_pkt *reply_pkt;
	struct net_buf *tmp;
	int header_len, recv_len, reply_len;

	printk("%s received %d bytes", name,
	      net_pkt_appdatalen(pkt));

	reply_pkt = net_pkt_get_tx(context, K_FOREVER);

	recv_len = net_pkt_get_len(pkt);

	tmp = pkt->frags;
	/* Remove frag link so original pkt can be unrefed */
	pkt->frags = NULL;

	/* First fragment will contain IP header so move the data
	 * down in order to get rid of it.
	 */
	header_len = net_pkt_appdata(pkt) - tmp->data;

	/* After this pull, the tmp->data points directly to application
	 * data.
	 */
	net_buf_pull(tmp, header_len);

	/* Add the entire chain into reply */
	net_pkt_frag_add(reply_pkt, tmp);

	reply_len = net_pkt_get_len(reply_pkt);

	printk("Received %d bytes, sending %d bytes", recv_len - header_len,
	       reply_len);

	return reply_pkt;
}
Exemplo n.º 6
0
int http_request(struct http_client_ctx *ctx,
		 struct http_client_request *req,
		 s32_t timeout)
{
	const char *method = http_method_str(req->method);
	struct net_pkt *pkt;
	int ret = -ENOMEM;

	pkt = net_pkt_get_tx(ctx->tcp.ctx, timeout);
	if (!pkt) {
		return -ENOMEM;
	}

	if (!net_pkt_append_all(pkt, strlen(method), (u8_t *)method,
				timeout)) {
		goto out;
	}

	/* Space after method string. */
	if (!net_pkt_append_all(pkt, 1, (u8_t *)" ", timeout)) {
		goto out;
	}

	if (!net_pkt_append_all(pkt, strlen(req->url), (u8_t *)req->url,
				timeout)) {
		goto out;
	}

	if (!net_pkt_append_all(pkt, strlen(req->protocol),
				(u8_t *)req->protocol, timeout)) {
		goto out;
	}

	if (req->host) {
		if (!net_pkt_append_all(pkt, strlen(HTTP_HOST),
					(u8_t *)HTTP_HOST, timeout)) {
			goto out;
		}

		if (!net_pkt_append_all(pkt, strlen(req->host),
					(u8_t *)req->host, timeout)) {
			goto out;
		}

		if (!net_pkt_append_all(pkt, strlen(HTTP_CRLF),
					(u8_t *)HTTP_CRLF, timeout)) {
			goto out;
		}
	}

	if (req->header_fields) {
		if (!net_pkt_append_all(pkt, strlen(req->header_fields),
					(u8_t *)req->header_fields,
					timeout)) {
			goto out;
		}
	}

	if (req->content_type_value) {
		if (!net_pkt_append_all(pkt, strlen(HTTP_CONTENT_TYPE),
					(u8_t *)HTTP_CONTENT_TYPE,
					timeout)) {
			goto out;
		}

		if (!net_pkt_append_all(pkt, strlen(req->content_type_value),
					(u8_t *)req->content_type_value,
					timeout)) {
			goto out;
		}
	}

	if (req->payload && req->payload_size) {
		char content_len_str[HTTP_CONT_LEN_SIZE];

		ret = snprintk(content_len_str, HTTP_CONT_LEN_SIZE,
			       HTTP_CRLF "Content-Length: %u"
			       HTTP_CRLF HTTP_CRLF,
			       req->payload_size);
		if (ret <= 0 || ret >= HTTP_CONT_LEN_SIZE) {
			ret = -ENOMEM;
			goto out;
		}

		if (!net_pkt_append_all(pkt, ret, (u8_t *)content_len_str,
					timeout)) {
			ret = -ENOMEM;
			goto out;
		}

		if (!net_pkt_append_all(pkt, req->payload_size,
					(u8_t *)req->payload,
					timeout)) {
			ret = -ENOMEM;
			goto out;
		}
	} else {
		if (!net_pkt_append_all(pkt, strlen(HTTP_EOF),
					(u8_t *)HTTP_EOF,
					timeout)) {
			goto out;
		}
	}

#if defined(CONFIG_NET_IPV6)
	if (net_pkt_family(pkt) == AF_INET6) {
		net_pkt_set_appdatalen(pkt, net_pkt_get_len(pkt) -
				       net_pkt_ip_hdr_len(pkt) -
				       net_pkt_ipv6_ext_opt_len(pkt));
	} else
#endif
	{
		net_pkt_set_appdatalen(pkt, net_pkt_get_len(pkt) -
				       net_pkt_ip_hdr_len(pkt));
	}

	ret = ctx->tcp.send_data(pkt, NULL, timeout, NULL, ctx);
	if (ret == 0) {
		return 0;
	}

out:
	net_pkt_unref(pkt);

	return ret;
}
Exemplo n.º 7
0
static struct net_pkt *build_reply_pkt(const char *name,
				       struct net_context *context,
				       struct net_pkt *pkt)
{
	struct net_pkt *reply_pkt;
	struct net_buf *frag, *tmp;
	int header_len, recv_len, reply_len;

	NET_INFO("%s received %d bytes", name,
		 net_pkt_appdatalen(pkt));

	if (net_pkt_appdatalen(pkt) == 0) {
		return NULL;
	}

	reply_pkt = net_pkt_get_tx(context, K_FOREVER);

	NET_ASSERT(reply_pkt);

	recv_len = net_pkt_get_len(pkt);

	tmp = pkt->frags;

	/* First fragment will contain IP header so move the data
	 * down in order to get rid of it.
	 */
	header_len = net_pkt_appdata(pkt) - tmp->data;

	NET_ASSERT(header_len < CONFIG_NET_BUF_DATA_SIZE);

	/* After this pull, the tmp->data points directly to application
	 * data.
	 */
	net_buf_pull(tmp, header_len);

	while (tmp) {
		frag = net_pkt_get_data(context, K_FOREVER);

		if (!net_buf_headroom(tmp)) {
			/* If there is no link layer headers in the
			 * received fragment, then get rid of that also
			 * in the sending fragment. We end up here
			 * if MTU is larger than fragment size, this
			 * is typical for ethernet.
			 */
			net_buf_push(frag, net_buf_headroom(frag));

			frag->len = 0; /* to make fragment empty */

			/* Make sure to set the reserve so that
			 * in sending side we add the link layer
			 * header if needed.
			 */
			net_pkt_set_ll_reserve(reply_pkt, 0);
		}

		NET_ASSERT(net_buf_tailroom(frag) >= tmp->len);

		memcpy(net_buf_add(frag, tmp->len), tmp->data, tmp->len);

		net_pkt_frag_add(reply_pkt, frag);

		tmp = net_pkt_frag_del(pkt, NULL, tmp);
	}

	reply_len = net_pkt_get_len(reply_pkt);

	NET_ASSERT_INFO((recv_len - header_len) == reply_len,
			"Received %d bytes, sending %d bytes",
			recv_len - header_len, reply_len);

	return reply_pkt;
}