static int uv__send(uv_udp_send_t* req,
uv_udp_t* handle,
uv_buf_t bufs[],
int bufcnt,
struct sockaddr* addr,
socklen_t addrlen,
uv_udp_send_cb send_cb) {
assert(bufcnt > 0);
if (uv__udp_maybe_deferred_bind(handle, addr->sa_family))
return -1;
uv__req_init(handle->loop, req, UV_UDP_SEND);
assert(addrlen <= sizeof(req->addr));
memcpy(&req->addr, addr, addrlen);
req->send_cb = send_cb;
req->handle = handle;
req->bufcnt = bufcnt;
if (bufcnt <= (int) ARRAY_SIZE(req->bufsml)) {
req->bufs = req->bufsml;
}
else if ((req->bufs = malloc(bufcnt * sizeof(bufs[0]))) == NULL) {
uv__set_sys_error(handle->loop, ENOMEM);
return -1;
}
memcpy(req->bufs, bufs, bufcnt * sizeof(bufs[0]));
ngx_queue_insert_tail(&handle->write_queue, &req->queue);
uv__io_start(handle->loop, &handle->io_watcher, UV__POLLOUT);
uv__handle_start(handle);
return 0;
}
static int uv__udp_send(uv_udp_send_t* req,
uv_udp_t* handle,
uv_buf_t bufs[],
int bufcnt,
struct sockaddr* addr,
socklen_t addrlen,
uv_udp_send_cb send_cb) {
if (uv__udp_maybe_deferred_bind(handle, addr->sa_family))
return -1;
uv__req_init(handle->loop, (uv_req_t*)req);
memcpy(&req->addr, addr, addrlen);
req->addrlen = addrlen;
req->send_cb = send_cb;
req->handle = handle;
req->bufcnt = bufcnt;
req->type = UV_UDP_SEND;
if (bufcnt <= UV_REQ_BUFSML_SIZE) {
req->bufs = req->bufsml;
}
else if ((req->bufs = malloc(bufcnt * sizeof(bufs[0]))) == NULL) {
uv__set_sys_error(handle->loop, ENOMEM);
return -1;
}
memcpy(req->bufs, bufs, bufcnt * sizeof(bufs[0]));
ngx_queue_insert_tail(&handle->write_queue, &req->queue);
uv__udp_start_write_watcher(handle);
return 0;
}
int uv_udp_recv_start(uv_udp_t* handle,
uv_alloc_cb alloc_cb,
uv_udp_recv_cb recv_cb) {
if (alloc_cb == NULL || recv_cb == NULL) {
uv__set_artificial_error(handle->loop, UV_EINVAL);
return -1;
}
if (uv__io_active(&handle->read_watcher)) {
uv__set_artificial_error(handle->loop, UV_EALREADY);
return -1;
}
if (uv__udp_maybe_deferred_bind(handle, AF_INET))
return -1;
handle->alloc_cb = alloc_cb;
handle->recv_cb = recv_cb;
uv__udp_start_watcher(handle,
&handle->read_watcher,
uv__udp_recvmsg,
UV__IO_READ);
return 0;
}
int uv_udp_set_membership(uv_udp_t* handle,
const char* multicast_addr,
const char* interface_addr,
uv_membership membership) {
int err;
struct sockaddr_in addr4;
struct sockaddr_in6 addr6;
if (uv_ip4_addr(multicast_addr, 0, &addr4) == 0) {
err = uv__udp_maybe_deferred_bind(handle, AF_INET, UV_UDP_REUSEADDR);
if (err)
return err;
return uv__udp_set_membership4(handle, &addr4, interface_addr, membership);
} else if (uv_ip6_addr(multicast_addr, 0, &addr6) == 0) {
err = uv__udp_maybe_deferred_bind(handle, AF_INET6, UV_UDP_REUSEADDR);
if (err)
return err;
return uv__udp_set_membership6(handle, &addr6, interface_addr, membership);
} else {
return -EINVAL;
}
}
int uv__udp_send(uv_udp_send_t* req,
uv_udp_t* handle,
const uv_buf_t bufs[],
unsigned int nbufs,
const struct sockaddr* addr,
unsigned int addrlen,
uv_udp_send_cb send_cb) {
int err;
int empty_queue;
assert(nbufs > 0);
err = uv__udp_maybe_deferred_bind(handle, addr->sa_family, 0);
if (err)
return err;
/* It's legal for send_queue_count > 0 even when the write_queue is empty;
* it means there are error-state requests in the write_completed_queue that
* will touch up send_queue_size/count later.
*/
empty_queue = (handle->send_queue_count == 0);
uv__req_init(handle->loop, req, UV_UDP_SEND);
assert(addrlen <= sizeof(req->addr));
memcpy(&req->addr, addr, addrlen);
req->send_cb = send_cb;
req->handle = handle;
req->nbufs = nbufs;
req->bufs = req->bufsml;
if (nbufs > ARRAY_SIZE(req->bufsml))
req->bufs = uv__malloc(nbufs * sizeof(bufs[0]));
if (req->bufs == NULL)
return -ENOMEM;
memcpy(req->bufs, bufs, nbufs * sizeof(bufs[0]));
handle->send_queue_size += uv__count_bufs(req->bufs, req->nbufs);
handle->send_queue_count++;
QUEUE_INSERT_TAIL(&handle->write_queue, &req->queue);
uv__handle_start(handle);
if (empty_queue && !(handle->flags & UV_UDP_PROCESSING)) {
uv__udp_sendmsg(handle);
} else {
uv__io_start(handle->loop, &handle->io_watcher, UV__POLLOUT);
}
return 0;
}
int uv__udp_try_send(uv_udp_t* handle,
const uv_buf_t bufs[],
unsigned int nbufs,
const struct sockaddr* addr,
unsigned int addrlen) {
int err;
struct msghdr h;
ssize_t size;
assert(nbufs > 0);
/* already sending a message */
if (handle->send_queue_count != 0)
return -EAGAIN;
err = uv__udp_maybe_deferred_bind(handle, addr->sa_family, 0);
if (err)
return err;
memset(&h, 0, sizeof h);
h.msg_name = (struct sockaddr*) addr;
h.msg_namelen = addrlen;
h.msg_iov = (struct iovec*) bufs;
h.msg_iovlen = nbufs;
do {
size = sendmsg(handle->io_watcher.fd, &h, 0);
} while (size == -1 && errno == EINTR);
if (size == -1) {
if (errno == EAGAIN || errno == EWOULDBLOCK)
return -EAGAIN;
else
return -errno;
}
return size;
}
static int uv__send(uv_udp_send_t* req,
uv_udp_t* handle,
uv_buf_t bufs[],
int bufcnt,
struct sockaddr* addr,
socklen_t addrlen,
uv_udp_send_cb send_cb) {
int err;
assert(bufcnt > 0);
err = uv__udp_maybe_deferred_bind(handle, addr->sa_family);
if (err)
return err;
uv__req_init(handle->loop, req, UV_UDP_SEND);
assert(addrlen <= sizeof(req->addr));
memcpy(&req->addr, addr, addrlen);
req->send_cb = send_cb;
req->handle = handle;
req->bufcnt = bufcnt;
if (bufcnt <= (int) ARRAY_SIZE(req->bufsml))
req->bufs = req->bufsml;
else
req->bufs = malloc(bufcnt * sizeof(*bufs));
if (req->bufs == NULL)
return -ENOMEM;
memcpy(req->bufs, bufs, bufcnt * sizeof(bufs[0]));
QUEUE_INSERT_TAIL(&handle->write_queue, &req->queue);
uv__io_start(handle->loop, &handle->io_watcher, UV__POLLOUT);
uv__handle_start(handle);
return 0;
}
int uv__udp_recv_start(uv_udp_t* handle,
uv_alloc_cb alloc_cb,
uv_udp_recv_cb recv_cb) {
int err;
if (alloc_cb == NULL || recv_cb == NULL)
return -EINVAL;
if (uv__io_active(&handle->io_watcher, UV__POLLIN))
return -EALREADY; /* FIXME(bnoordhuis) Should be -EBUSY. */
err = uv__udp_maybe_deferred_bind(handle, AF_INET, 0);
if (err)
return err;
handle->alloc_cb = alloc_cb;
handle->recv_cb = recv_cb;
uv__io_start(handle->loop, &handle->io_watcher, UV__POLLIN);
uv__handle_start(handle);
return 0;
}