mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
e75ffde09e
You can now build Cosmopolitan with Clang:
make -j8 MODE=llvm
o/llvm/examples/hello.com
The assembler and linker code is now friendly to LLVM too.
So it's not needed to configure Clang to use binutils under
the hood. If you love LLVM then you can now use pure LLVM.
67 lines
3.7 KiB
C
67 lines
3.7 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/assert.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/struct/iovec.h"
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#include "libc/dce.h"
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#include "libc/sock/internal.h"
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#include "libc/sock/sock.h"
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#include "libc/str/str.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Sends data over network.
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*
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* This function blocks unless MSG_DONTWAIT is passed. In that case, the
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* non-error EWOULDBLOCK might be returned. It basically means we didn't
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* wait around to learn an amount of bytes were written that we know in
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* advance are guaranteed to be atomic.
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*
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* @param fd is the file descriptor returned by socket()
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* @param buf is the data to send, which we'll copy if necessary
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* @param size is the byte-length of buf
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* @param flags MSG_OOB, MSG_DONTROUTE, MSG_PARTIAL, MSG_NOSIGNAL, etc.
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* @param opt_addr is a binary ip:port destination override, which is
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* mandatory for UDP if connect() wasn't called
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* @param addrsize is the byte-length of addr's true polymorphic form
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* @return number of bytes transmitted, or -1 w/ errno
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* @error EINTR, EHOSTUNREACH, ECONNRESET (UDP ICMP Port Unreachable),
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* EPIPE (if MSG_NOSIGNAL), EMSGSIZE, ENOTSOCK, EFAULT, etc.
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* @asyncsignalsafe
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*/
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ssize_t sendto(int fd, const void *buf, size_t size, uint32_t flags,
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const void *opt_addr, uint32_t addrsize) {
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assert(sizeof(struct sockaddr_in) == sizeof(struct sockaddr_in_bsd));
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if (!IsWindows()) {
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if (!IsBsd() || !opt_addr) {
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return sys_sendto(fd, buf, size, flags, opt_addr, addrsize);
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} else {
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struct sockaddr_in_bsd addr2;
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if (addrsize != sizeof(addr2)) return einval();
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memcpy(&addr2, opt_addr, sizeof(struct sockaddr_in));
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sockaddr2bsd(&addr2);
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return sys_sendto(fd, buf, size, flags, &addr2, addrsize);
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}
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} else if (__isfdkind(fd, kFdSocket)) {
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return sys_sendto_nt(&g_fds.p[fd], (struct iovec[]){{buf, size}}, 1, flags,
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opt_addr, addrsize);
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} else {
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return ebadf();
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}
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}
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