Example #1
0
static void process_req(uv_tcp_t* handle, ssize_t nread, uv_buf_t buf) {
    write_req_t *wr;
    dnshandle* dns = (dnshandle*)handle;
    char hdrbuf[DNSREC_LEN];
    int hdrbuf_remaining = DNSREC_LEN;
    int rec_remaining = 0;
    int readbuf_remaining;
    char* dnsreq;
    char* hdrstart;
    int usingprev = 0;

    wr = (write_req_t*) malloc(sizeof *wr);
    uv_req_init(&wr->req, (uv_handle_t*)handle, after_write);
    wr->buf.base = (char*)malloc(WRITE_BUF_LEN);
    wr->buf.len = 0;

    if (dns->state.prevbuf_ptr != NULL) {
        dnsreq = dns->state.prevbuf_ptr + dns->state.prevbuf_pos;
        readbuf_remaining = dns->state.prevbuf_rem;
        usingprev = 1;
    } else {
        dnsreq = buf.base;
        readbuf_remaining = nread;
    }
    hdrstart = dnsreq;

    while (dnsreq != NULL) {
        /* something to process */
        while (readbuf_remaining > 0) {
            /* something to process in current buffer */
            if (hdrbuf_remaining > 0) {
                /* process len and id */
                if (readbuf_remaining < hdrbuf_remaining) {
                    /* too little to get request header. save for next buffer */
                    memcpy(&hdrbuf[DNSREC_LEN - hdrbuf_remaining], dnsreq, readbuf_remaining);
                    hdrbuf_remaining = DNSREC_LEN - readbuf_remaining;
                    break;
                } else {
                    short int reclen_n;
                    /* save header */
                    memcpy(&hdrbuf[DNSREC_LEN - hdrbuf_remaining], dnsreq, hdrbuf_remaining);
                    dnsreq += hdrbuf_remaining;
                    readbuf_remaining -= hdrbuf_remaining;
                    hdrbuf_remaining = 0;

                    /* get record length */
                    reclen_n = *((short int*)hdrbuf);
                    rec_remaining = ntohs(reclen_n) - (DNSREC_LEN - 2);
                }
            }

            if (rec_remaining <= readbuf_remaining) {
                /* prepare reply */
                addrsp(wr, hdrbuf);

                /* move to next record */
                dnsreq += rec_remaining;
                hdrstart = dnsreq;
                readbuf_remaining -= rec_remaining;
                rec_remaining = 0;
                hdrbuf_remaining = DNSREC_LEN;
            } else {
                /* otherwise this buffer is done. */
                rec_remaining -= readbuf_remaining;
                break;
            }
        }

        /* if we had to use bytes from prev buffer, start processing the current one */
        if (usingprev == 1) {
            /* free previous buffer */
            free(dns->state.prevbuf_ptr);
            dnsreq = buf.base;
            readbuf_remaining = nread;
            usingprev = 0;
        } else {
            dnsreq = NULL;
        }
    }

    /* send write buffer */
    if (wr->buf.len > 0) {
        if (uv_write(&wr->req, &wr->buf, 1)) {
            FATAL("uv_write failed");
        }
    }

    if (readbuf_remaining > 0) {
        /* save start of record position, so we can continue on next read */
        dns->state.prevbuf_ptr = buf.base;
        dns->state.prevbuf_pos = hdrstart - buf.base;
        dns->state.prevbuf_rem = nread - dns->state.prevbuf_pos;
    } else {
        /* nothing left in this buffer */
        dns->state.prevbuf_ptr = NULL;
        dns->state.prevbuf_pos = 0;
        dns->state.prevbuf_rem = 0;
        free(buf.base);
    }
}
Example #2
0
static void on_read(uv_stream_t* handle,
                    ssize_t nread,
                    const uv_buf_t* buf) {
  int r;
  uv_pipe_t* pipe;
  uv_handle_type pending;
  uv_buf_t outbuf;

  pipe = (uv_pipe_t*) handle;

  if (nread == 0) {
    /* Everything OK, but nothing read. */
    free(buf->base);
    return;
  }

  if (nread < 0) {
    if (nread == UV_EOF) {
      free(buf->base);
      return;
    }

    printf("error recving on channel: %s\n", uv_strerror(nread));
    abort();
  }

  fprintf(stderr, "got %d bytes\n", (int)nread);

  pending = uv_pipe_pending_type(pipe);
  if (!tcp_server_listening) {
    ASSERT(1 == uv_pipe_pending_count(pipe));
    ASSERT(nread > 0 && buf->base && pending != UV_UNKNOWN_HANDLE);
    read_cb_called++;

    /* Accept the pending TCP server, and start listening on it. */
    ASSERT(pending == UV_TCP);
    r = uv_tcp_init(uv_default_loop(), &tcp_server);
    ASSERT(r == 0);

    r = uv_accept((uv_stream_t*)pipe, (uv_stream_t*)&tcp_server);
    ASSERT(r == 0);

    r = uv_listen((uv_stream_t*)&tcp_server, BACKLOG, on_connection);
    ASSERT(r == 0);

    tcp_server_listening = 1;

    /* Make sure that the expected data is correctly multiplexed. */
    ASSERT(memcmp("hello\n", buf->base, nread) == 0);

    outbuf = uv_buf_init("world\n", 6);
    r = uv_write(&write_req, (uv_stream_t*)pipe, &outbuf, 1, NULL);
    ASSERT(r == 0);

    /* Create a bunch of connections to get both servers to accept. */
    make_many_connections();
  } else if (memcmp("accepted_connection\n", buf->base, nread) == 0) {
    /* Remote server has accepted a connection.  Close the channel. */
    ASSERT(0 == uv_pipe_pending_count(pipe));
    ASSERT(pending == UV_UNKNOWN_HANDLE);
    remote_conn_accepted = 1;
    uv_close((uv_handle_t*)&channel, NULL);
  }

  free(buf->base);
}
Example #3
0
/**
 * handle queues. this handles all deletions of callbacks as well as setting up the uv requests on each cycle. In normal course of affairs, it will be locked
 * for operation, as should all the queue vectors for all the various requests
 */
void
UVEventLoop::HandleRunnerQueues()
{
	for (auto bit = resolvers.begin(); bit != resolvers.end();) {
		auto qp = *bit;
		if (qp->disposed) {
			if (qp->bindCB) delete qp->bindCB;
			delete qp;
			bit = resolvers.erase(bit);
		} else if (!qp->resolving) {
			qp->resolving = true;
			qp->dnsHints.ai_family = PF_INET;
			qp->dnsHints.ai_socktype = SOCK_STREAM;
			qp->dnsHints.ai_protocol = IPPROTO_TCP;
			qp->dnsHints.ai_flags = 0;
			qp->resolver.data = qp;
			UVTCPClient* client = const_cast<UVTCPClient*>(qp->client);
			if (client->address == nullptr || client->socket == nullptr) {

			}
			int r = uv_getaddrinfo(
					loop, &qp->resolver, OnResolved,
					qp->host.c_str(), qp->service.c_str(), &qp->dnsHints);
			if (r<0) {
				if (qp->bindCB) {
					(*qp->bindCB)(client->address, kUVBindCallError);
				}
				qp->disposed = true;
			}
			++bit;
		} else {
			++bit;
		}
	}
	for (auto rit = readers.begin(); rit != readers.end();) {
		auto qp = *rit;
		if (qp->disposed) {
//! in the main connection queue, readers, the socket i.e. client has ownership of the read callback (*rit)->cb that should be erased by the close request, which will
//! supplant the read functional call back with a close functional
			if (qp->connectCB) delete qp->connectCB;
			if (qp->readerCB) delete qp->readerCB;
			if (qp->closerCB) delete qp->closerCB;
			delete qp;
			rit = readers.erase(rit);
		} else if (qp->closing) {
			UVTCPClient* client = const_cast<UVTCPClient*>(qp->client);
			int r = uv_read_stop((uv_stream_t*)client->socket);
			if (r >= 0) {
				uv_close((uv_handle_t*)client->socket, OnClose);
			}
			qp->closing = false; // only try to close once!
			++rit;
		} else if (!qp->connected) {
			qp->connected = true;
			UVTCPClient *client = const_cast<UVTCPClient*>(qp->client);
			if (client->socket) {
				if (client->socket->data) { // should already be deleted
				}
				uv_tcp_init(loop, client->socket);
				client->socket->data = qp;
				qp->request.data = qp;
				int r=uv_tcp_connect(&qp->request, client->socket, client->address, OnConnect);
				if (r<0) {
					if (qp->connectCB) {
						(*qp->connectCB)(&qp->request, kUVCnxCallError);
					}
				}
			}
			++rit;
		} else {
			++rit;
		}
	}
	for (auto writ = writers.begin(); writ != writers.end();) {
		auto qp=*writ;
		if (qp->disposed) {
			if (qp->buf.base) {
				delete []qp->buf.base;
			}
			delete *writ;
			writ = writers.erase(writ);
		} else {
			UVTCPClient* client = const_cast<UVTCPClient*>((*writ)->client);
			int r=uv_write(&qp->request, (uv_stream_t*)client->socket, &qp->buf, 1, OnWrite);
			if (r < 0) {
				qp->disposed = true;
			}
			++writ;
		}
	}
	;
	for (auto cit = closers.begin(); cit != closers.end();) {
		auto qp = *cit;
		if (qp->disposed) {
			if (qp->cb) delete qp->cb;
			delete qp;
			cit=closers.erase(cit);
		} else {
			UVTCPClient* client = const_cast<UVTCPClient*>(qp->client);
			uv_read_stop((uv_stream_t*)client->socket);
			if (client->socket->data) {
				delete static_cast<ReaderCB*>(client->socket->data);
			}
			client->socket->data = qp;
			uv_close((uv_handle_t*)client->socket, OnClose);
			++cit;
		}
	}
//	workerLock.lock();
	for (auto wit = activeWorkers.begin(); wit != activeWorkers.end();) {
		auto qp=*wit;
		if (qp->disposed) {
			if (qp->queuedCB) delete qp->queuedCB;
			if (qp->apresCB) delete qp->apresCB;
			delete qp;
			wit = activeWorkers.erase(wit);
		} else {
			int r = uv_queue_work(loop, &qp->work, OnWork, OnAfterWork);
			if (r < 0) {
				OnAfterWork(&qp->work, r);
			}
			++wit;
		}
	}
//	workerLock.unlock();
	for (auto tit = scheduledTimers.begin(); tit != scheduledTimers.end();) {
		auto qp = *tit;
		if (qp->disposed) {
			if (qp->tikCB) delete qp->tikCB;
			delete qp;
		} else {
			DEBUG_OUT("UVEventLoop::HandleRunnerQueues() timer started");
			uv_timer_init(loop, &qp->timer);
			uv_timer_start(&qp->timer, OnTick, qp->delayMS, qp->repeatMs);
			activeTimers.push_back(qp);
		}
		tit = scheduledTimers.erase(tit);
	}
	for (auto tit = activeTimers.begin(); tit != activeTimers.end();) {
		auto qp = *tit;
		if (qp->disposed) {
			DEBUG_OUT("UVEventLoop::HandleRunnerQueues() timer cleaned up");
			if (uv_is_active((uv_handle_t*)&qp->timer)) {
				DEBUG_OUT("UVEventLoop::HandleRunnerQueues() stopping an active timer");
				uv_timer_stop(&qp->timer);
				++tit;
			} else {
				if (qp->tikCB) delete qp->tikCB;
				delete qp;
				tit = activeTimers.erase(tit);
			}
		} else {
			++tit;
		}
	}
}
Example #4
0
File: Pipe.c Project: AdUser/cjdns
    }
    req->pipe->queueLen -= req->msg->length;
    Assert_true(req->pipe->queueLen >= 0);
    Allocator_free(req->alloc);
}

static uint8_t sendMessage2(struct Pipe_WriteRequest_pvt* req)
{
    struct Pipe_pvt* pipe = req->pipe;
    struct Message* m = req->msg;

    uv_buf_t buffers[] = {
        { .base = (char*)m->bytes, .len = m->length }
    };

    int ret = uv_write(&req->uvReq, (uv_stream_t*) pipe->out, buffers, 1, sendMessageCallback);
    if (ret) {
        Log_info(pipe->pub.logger, "Failed writing to pipe [%s] [%s]",
                 pipe->pub.fullName, uv_strerror(ret) );
        Allocator_free(req->alloc);
        return Error_UNDELIVERABLE;
    }
    pipe->queueLen += m->length;

    return Error_NONE;
}

static uint8_t sendMessage(struct Message* m, struct Interface* iface)
{
    struct Pipe_pvt* pipe = Identity_cast((struct Pipe_pvt*) iface);