mirror of
https://github.com/jart/cosmopolitan.git
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0ba3199915
- The functions that return a sockaddr now do so the same way the Linux Kernel does across platforms, e.g. getpeername(), accept4() - Socket system calls on Windows will now only check for interrupts when a blocking operation needs to be performed. - Write tests for recvfrom() system call
97 lines
4.2 KiB
C
97 lines
4.2 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/internal.h"
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#include "libc/calls/state.internal.h"
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#include "libc/errno.h"
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#include "libc/macros.internal.h"
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#include "libc/mem/mem.h"
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#include "libc/nt/winsock.h"
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#include "libc/sock/internal.h"
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#include "libc/sock/struct/sockaddr.h"
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#include "libc/sock/syscall_fd.internal.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/af.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/consts/sock.h"
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union AcceptExAddr {
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struct sockaddr_storage addr;
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char buf[sizeof(struct sockaddr_storage) + 16];
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};
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struct AcceptExBuffer {
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union AcceptExAddr local;
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union AcceptExAddr remote;
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};
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textwindows int sys_accept_nt(struct Fd *fd, struct sockaddr_storage *addr,
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int accept4_flags) {
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int64_t handle;
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int rc, client, oflags;
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uint32_t bytes_received;
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uint32_t completion_flags;
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struct AcceptExBuffer buffer;
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struct SockFd *sockfd, *sockfd2;
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// creates resources for child socket
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// inherit the listener configuration
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sockfd = (struct SockFd *)fd->extra;
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if (!(sockfd2 = malloc(sizeof(struct SockFd)))) {
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return -1;
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}
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memcpy(sockfd2, sockfd, sizeof(*sockfd));
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if ((handle = WSASocket(sockfd2->family, sockfd2->type, sockfd2->protocol,
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NULL, 0, kNtWsaFlagOverlapped)) == -1) {
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free(sockfd2);
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return __winsockerr();
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}
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// accept network connection
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struct NtOverlapped overlapped = {.hEvent = WSACreateEvent()};
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if (!AcceptEx(fd->handle, handle, &buffer, 0, sizeof(buffer.local),
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sizeof(buffer.remote), &bytes_received, &overlapped)) {
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sockfd = (struct SockFd *)fd->extra;
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if (__wsablock(fd, &overlapped, &completion_flags, true,
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sockfd->rcvtimeo) == -1) {
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WSACloseEvent(overlapped.hEvent);
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__sys_closesocket_nt(handle);
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free(sockfd2);
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return -1;
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}
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}
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WSACloseEvent(overlapped.hEvent);
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// create file descriptor for new socket
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// don't inherit the file open mode bits
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oflags = 0;
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if (accept4_flags & SOCK_CLOEXEC) oflags |= O_CLOEXEC;
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if (accept4_flags & SOCK_NONBLOCK) oflags |= O_NONBLOCK;
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__fds_lock();
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client = __reservefd_unlocked(-1);
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g_fds.p[client].kind = kFdSocket;
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g_fds.p[client].flags = oflags;
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g_fds.p[client].mode = 0140666;
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g_fds.p[client].handle = handle;
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g_fds.p[client].extra = (uintptr_t)sockfd2;
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__fds_unlock();
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// handoff information to caller;
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memcpy(addr, &buffer.remote.addr, sizeof(*addr));
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return client;
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}
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