| /* |
| * |
| * Copyright 2014, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #include <grpc/support/port_platform.h> |
| |
| #ifdef GPR_WINSOCK_SOCKET |
| |
| #define _GNU_SOURCE |
| #include "src/core/iomgr/sockaddr_utils.h" |
| |
| #include "src/core/iomgr/pollset_windows.h" |
| #include "src/core/iomgr/socket_windows.h" |
| #include "src/core/iomgr/tcp_server.h" |
| #include "src/core/iomgr/tcp_windows.h" |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/log_win32.h> |
| #include <grpc/support/sync.h> |
| #include <grpc/support/time.h> |
| |
| #define INIT_PORT_CAP 2 |
| #define MIN_SAFE_ACCEPT_QUEUE_SIZE 100 |
| |
| static gpr_once s_init_max_accept_queue_size; |
| static int s_max_accept_queue_size; |
| |
| /* one listening port */ |
| typedef struct server_port { |
| gpr_uint8 addresses[sizeof(struct sockaddr_in6) * 2 + 32]; |
| SOCKET new_socket; |
| grpc_winsocket *socket; |
| grpc_tcp_server *server; |
| LPFN_ACCEPTEX AcceptEx; |
| } server_port; |
| |
| /* the overall server */ |
| struct grpc_tcp_server { |
| grpc_tcp_server_cb cb; |
| void *cb_arg; |
| |
| gpr_mu mu; |
| gpr_cv cv; |
| |
| /* active port count: how many ports are actually still listening */ |
| int active_ports; |
| |
| /* all listening ports */ |
| server_port *ports; |
| size_t nports; |
| size_t port_capacity; |
| }; |
| |
| grpc_tcp_server *grpc_tcp_server_create(void) { |
| grpc_tcp_server *s = gpr_malloc(sizeof(grpc_tcp_server)); |
| gpr_mu_init(&s->mu); |
| gpr_cv_init(&s->cv); |
| s->active_ports = 0; |
| s->cb = NULL; |
| s->cb_arg = NULL; |
| s->ports = gpr_malloc(sizeof(server_port) * INIT_PORT_CAP); |
| s->nports = 0; |
| s->port_capacity = INIT_PORT_CAP; |
| return s; |
| } |
| |
| void grpc_tcp_server_destroy(grpc_tcp_server *s) { |
| size_t i; |
| gpr_mu_lock(&s->mu); |
| /* shutdown all fd's */ |
| for (i = 0; i < s->nports; i++) { |
| grpc_winsocket_shutdown(s->ports[i].socket); |
| } |
| /* wait while that happens */ |
| while (s->active_ports) { |
| gpr_cv_wait(&s->cv, &s->mu, gpr_inf_future); |
| } |
| gpr_mu_unlock(&s->mu); |
| |
| /* delete ALL the things */ |
| for (i = 0; i < s->nports; i++) { |
| server_port *sp = &s->ports[i]; |
| grpc_winsocket_orphan(sp->socket); |
| } |
| gpr_free(s->ports); |
| gpr_free(s); |
| } |
| |
| /* Prepare a recently-created socket for listening. */ |
| static int prepare_socket(SOCKET sock, |
| const struct sockaddr *addr, int addr_len) { |
| struct sockaddr_storage sockname_temp; |
| socklen_t sockname_len; |
| |
| if (sock == INVALID_SOCKET) goto error; |
| |
| if (!grpc_tcp_prepare_socket(sock)) { |
| char *utf8_message = gpr_format_message(WSAGetLastError()); |
| gpr_log(GPR_ERROR, "Unable to prepare socket: %s", utf8_message); |
| gpr_free(utf8_message); |
| goto error; |
| } |
| |
| if (bind(sock, addr, addr_len) == SOCKET_ERROR) { |
| char *addr_str; |
| char *utf8_message = gpr_format_message(WSAGetLastError()); |
| grpc_sockaddr_to_string(&addr_str, addr, 0); |
| gpr_log(GPR_ERROR, "bind addr=%s: %s", addr_str, utf8_message); |
| gpr_free(utf8_message); |
| gpr_free(addr_str); |
| goto error; |
| } |
| |
| if (listen(sock, SOMAXCONN) == SOCKET_ERROR) { |
| char *utf8_message = gpr_format_message(WSAGetLastError()); |
| gpr_log(GPR_ERROR, "listen: %s", utf8_message); |
| gpr_free(utf8_message); |
| goto error; |
| } |
| |
| sockname_len = sizeof(sockname_temp); |
| if (getsockname(sock, (struct sockaddr *) &sockname_temp, &sockname_len) |
| == SOCKET_ERROR) { |
| char *utf8_message = gpr_format_message(WSAGetLastError()); |
| gpr_log(GPR_ERROR, "getsockname: %s", utf8_message); |
| gpr_free(utf8_message); |
| goto error; |
| } |
| |
| return grpc_sockaddr_get_port((struct sockaddr *) &sockname_temp); |
| |
| error: |
| if (sock != INVALID_SOCKET) closesocket(sock); |
| return -1; |
| } |
| |
| static void on_accept(void *arg, int success); |
| |
| static void start_accept(server_port *port) { |
| SOCKET sock = INVALID_SOCKET; |
| char *message; |
| char *utf8_message; |
| BOOL success; |
| DWORD addrlen = sizeof(struct sockaddr_in6) + 16; |
| DWORD bytes_received = 0; |
| |
| sock = WSASocket(AF_INET6, SOCK_STREAM, IPPROTO_TCP, NULL, 0, |
| WSA_FLAG_OVERLAPPED); |
| |
| if (sock == INVALID_SOCKET) { |
| message = "Unable to create socket: %s"; |
| goto failure; |
| } |
| |
| if (!grpc_tcp_prepare_socket(sock)) { |
| message = "Unable to prepare socket: %s"; |
| goto failure; |
| } |
| |
| success = port->AcceptEx(port->socket->socket, sock, port->addresses, 0, |
| addrlen, addrlen, &bytes_received, |
| &port->socket->read_info.overlapped); |
| |
| if (success) { |
| gpr_log(GPR_DEBUG, "accepted immediately - but we still go to sleep"); |
| } else { |
| int error = WSAGetLastError(); |
| if (error != ERROR_IO_PENDING) { |
| message = "AcceptEx failed: %s"; |
| goto failure; |
| } |
| } |
| |
| port->new_socket = sock; |
| grpc_socket_notify_on_read(port->socket, on_accept, port); |
| return; |
| |
| failure: |
| utf8_message = gpr_format_message(WSAGetLastError()); |
| gpr_log(GPR_ERROR, message, utf8_message); |
| gpr_free(utf8_message); |
| if (sock != INVALID_SOCKET) closesocket(sock); |
| } |
| |
| /* event manager callback when reads are ready */ |
| static void on_accept(void *arg, int success) { |
| server_port *sp = arg; |
| SOCKET sock = sp->new_socket; |
| grpc_winsocket_callback_info *info = &sp->socket->read_info; |
| grpc_endpoint *ep = NULL; |
| |
| if (success) { |
| DWORD transfered_bytes = 0; |
| DWORD flags; |
| BOOL wsa_success = WSAGetOverlappedResult(sock, &info->overlapped, |
| &transfered_bytes, FALSE, |
| &flags); |
| if (!wsa_success) { |
| char *utf8_message = gpr_format_message(WSAGetLastError()); |
| gpr_log(GPR_ERROR, "on_accept error: %s", utf8_message); |
| gpr_free(utf8_message); |
| closesocket(sock); |
| } else { |
| gpr_log(GPR_DEBUG, "on_accept: accepted connection"); |
| ep = grpc_tcp_create(grpc_winsocket_create(sock)); |
| } |
| } else { |
| gpr_log(GPR_DEBUG, "on_accept: shutting down"); |
| closesocket(sock); |
| gpr_mu_lock(&sp->server->mu); |
| if (0 == --sp->server->active_ports) { |
| gpr_cv_broadcast(&sp->server->cv); |
| } |
| gpr_mu_unlock(&sp->server->mu); |
| } |
| |
| if (ep) sp->server->cb(sp->server->cb_arg, ep); |
| start_accept(sp); |
| } |
| |
| static int add_socket_to_server(grpc_tcp_server *s, SOCKET sock, |
| const struct sockaddr *addr, int addr_len) { |
| server_port *sp; |
| int port; |
| int status; |
| GUID guid = WSAID_ACCEPTEX; |
| DWORD ioctl_num_bytes; |
| LPFN_ACCEPTEX AcceptEx; |
| |
| if (sock == INVALID_SOCKET) return -1; |
| |
| status = WSAIoctl(sock, SIO_GET_EXTENSION_FUNCTION_POINTER, |
| &guid, sizeof(guid), &AcceptEx, sizeof(AcceptEx), |
| &ioctl_num_bytes, NULL, NULL); |
| |
| if (status != 0) { |
| char *utf8_message = gpr_format_message(WSAGetLastError()); |
| gpr_log(GPR_ERROR, "on_connect error: %s", utf8_message); |
| gpr_free(utf8_message); |
| closesocket(sock); |
| return -1; |
| } |
| |
| port = prepare_socket(sock, addr, addr_len); |
| if (port >= 0) { |
| gpr_mu_lock(&s->mu); |
| GPR_ASSERT(!s->cb && "must add ports before starting server"); |
| /* append it to the list under a lock */ |
| if (s->nports == s->port_capacity) { |
| s->port_capacity *= 2; |
| s->ports = gpr_realloc(s->ports, sizeof(server_port) * s->port_capacity); |
| } |
| sp = &s->ports[s->nports++]; |
| sp->server = s; |
| sp->socket = grpc_winsocket_create(sock); |
| sp->AcceptEx = AcceptEx; |
| GPR_ASSERT(sp->socket); |
| gpr_mu_unlock(&s->mu); |
| } |
| |
| return port; |
| } |
| |
| int grpc_tcp_server_add_port(grpc_tcp_server *s, const void *addr, |
| int addr_len) { |
| int allocated_port = -1; |
| unsigned i; |
| SOCKET sock; |
| struct sockaddr_in6 addr6_v4mapped; |
| struct sockaddr_in6 wildcard; |
| struct sockaddr *allocated_addr = NULL; |
| struct sockaddr_storage sockname_temp; |
| socklen_t sockname_len; |
| int port; |
| |
| /* Check if this is a wildcard port, and if so, try to keep the port the same |
| as some previously created listener. */ |
| if (grpc_sockaddr_get_port(addr) == 0) { |
| for (i = 0; i < s->nports; i++) { |
| sockname_len = sizeof(sockname_temp); |
| if (0 == getsockname(s->ports[i].socket->socket, |
| (struct sockaddr *) &sockname_temp, |
| &sockname_len)) { |
| port = grpc_sockaddr_get_port((struct sockaddr *) &sockname_temp); |
| if (port > 0) { |
| allocated_addr = malloc(addr_len); |
| memcpy(allocated_addr, addr, addr_len); |
| grpc_sockaddr_set_port(allocated_addr, port); |
| addr = allocated_addr; |
| break; |
| } |
| } |
| } |
| } |
| |
| if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) { |
| addr = (const struct sockaddr *)&addr6_v4mapped; |
| addr_len = sizeof(addr6_v4mapped); |
| } |
| |
| /* Treat :: or 0.0.0.0 as a family-agnostic wildcard. */ |
| if (grpc_sockaddr_is_wildcard(addr, &port)) { |
| grpc_sockaddr_make_wildcard6(port, &wildcard); |
| |
| addr = (struct sockaddr *) &wildcard; |
| addr_len = sizeof(wildcard); |
| } |
| |
| sock = WSASocket(AF_INET6, SOCK_STREAM, IPPROTO_TCP, NULL, 0, |
| WSA_FLAG_OVERLAPPED); |
| if (sock == INVALID_SOCKET) { |
| char *utf8_message = gpr_format_message(WSAGetLastError()); |
| gpr_log(GPR_ERROR, "unable to create socket: %s", utf8_message); |
| gpr_free(utf8_message); |
| } |
| |
| allocated_port = add_socket_to_server(s, sock, addr, addr_len); |
| gpr_free(allocated_addr); |
| |
| return allocated_port; |
| } |
| |
| SOCKET grpc_tcp_server_get_socket(grpc_tcp_server *s, unsigned index) { |
| return (index < s->nports) ? s->ports[index].socket->socket : INVALID_SOCKET; |
| } |
| |
| void grpc_tcp_server_start(grpc_tcp_server *s, grpc_pollset *pollset, |
| grpc_tcp_server_cb cb, void *cb_arg) { |
| size_t i; |
| GPR_ASSERT(cb); |
| gpr_mu_lock(&s->mu); |
| GPR_ASSERT(!s->cb); |
| GPR_ASSERT(s->active_ports == 0); |
| s->cb = cb; |
| s->cb_arg = cb_arg; |
| for (i = 0; i < s->nports; i++) { |
| start_accept(s->ports + i); |
| s->active_ports++; |
| } |
| gpr_mu_unlock(&s->mu); |
| } |
| |
| #endif /* GPR_WINSOCK_SOCKET */ |