mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +00:00
18bb5888e1
- Remove PAGESIZE constant
- Fix realloc() documentation
- Fix ttyname_r() error reporting
- Make forking more reliable on Windows
- Make execvp() a few microseconds faster
- Make system() a few microseconds faster
- Tighten up the socket-related magic numbers
- Loosen restrictions on mmap() offset alignment
- Improve GetProgramExecutableName() with getenv("_")
- Use mkstemp() as basis for mktemp(), tmpfile(), tmpfd()
- Fix flakes in pthread_cancel_test, unix_test, fork_test
- Fix recently introduced futex stack overflow regression
- Let sockets be passed as stdio to subprocesses on Windows
- Improve security of bind() on Windows w/ SO_EXCLUSIVEADDRUSE
65 lines
3.4 KiB
C
65 lines
3.4 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/dce.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/intrin/strace.internal.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/sock/struct/sockaddr.h"
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#include "libc/sock/struct/sockaddr.internal.h"
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#include "libc/sock/syscall_fd.internal.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Assigns local address and port number to socket, e.g.
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*
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* struct sockaddr_in in = {AF_INET, htons(12345), {htonl(0x7f000001)}};
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* int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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* bind(fd, (struct sockaddr *)&in, sizeof(in));
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*
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* On Windows, Cosmopolitan's implementation of bind() takes care of
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* always setting the WIN32-specific `SO_EXCLUSIVEADDRUSE` option on
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* inet stream sockets in order to safeguard your servers from tests
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*
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* @param fd is the file descriptor returned by socket()
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* @param addr is usually the binary-encoded ip:port on which to listen
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* @param addrsize is the byte-length of addr's true polymorphic form
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* @return 0 on success or -1 w/ errno
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* @error ENETDOWN, EPFNOSUPPORT, etc.
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* @asyncsignalsafe
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*/
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int bind(int fd, const struct sockaddr *addr, uint32_t addrsize) {
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int rc;
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if (!addr || (IsAsan() && !__asan_is_valid(addr, addrsize))) {
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rc = efault();
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} else if (addrsize >= sizeof(struct sockaddr_in)) {
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if (!IsWindows()) {
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rc = sys_bind(fd, addr, addrsize);
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} else if (__isfdkind(fd, kFdSocket)) {
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rc = sys_bind_nt(&g_fds.p[fd], addr, addrsize);
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} else {
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rc = ebadf();
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}
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} else {
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rc = einval();
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}
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STRACE("bind(%d, %s) -> %d% lm", fd, DescribeSockaddr(addr, addrsize), rc);
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return rc;
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}
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