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https://github.com/jart/cosmopolitan.git
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416fd86676
- Emulator can now test the αcτµαlly pδrταblε εxεcµταblε bootloader - Whipped up a webserver named redbean. It services 150k requests per second on a single core. Bundling assets inside zip enables extremely fast serving for two reasons. The first is that zip central directory lookups go faster than stat() system calls. The second is that both zip and gzip content-encoding use DEFLATE, therefore, compressed responses can be served via the sendfile() system call which does an in-kernel copy directly from the zip executable structure. Also note that red bean zip executables can be deployed easily to all platforms, since these native executables work on Linux, Mac, BSD, and Windows. - Address sanitizer now works very well
78 lines
3.7 KiB
C
78 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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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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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/errno.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/sock.h"
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#include "libc/sysv/consts/so.h"
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#include "libc/sysv/errfuns.h"
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static bool setsockopt_polyfill(int *optname) {
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if (errno == ENOPROTOOPT && *optname == SO_REUSEPORT /* RHEL5 */) {
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*optname = SO_REUSEADDR; /* close enough */
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return true; /* fudges errno */
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}
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return false;
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}
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static textwindows int setsockopt$nt(struct Fd *fd, int level, int optname,
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const void *optval, uint32_t optlen) {
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if (__setsockopt$nt(fd->handle, level, optname, optval, optlen) != -1) {
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return 0;
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} else {
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return winsockerr();
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}
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}
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/**
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* Modifies socket settings.
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*
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* This function is the ultimate rabbit hole. Basic usage:
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*
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* int yes = 1;
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* setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &yes, sizeof(yes));
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*
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* @param level can be SOL_SOCKET, SOL_IP, SOL_TCP, etc.
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* @param optname can be SO_{REUSE{PORT,ADDR},KEEPALIVE,etc.} etc.
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* @return 0 on success, or -1 w/ errno
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* @error ENOPROTOOPT for unknown (level,optname)
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* @see libc/sysv/consts.sh for tuning catalogue
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* @see getsockopt()
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*/
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int setsockopt(int fd, int level, int optname, const void *optval,
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uint32_t optlen) {
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if (!optval) return efault();
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if (!level || !optname) return enoprotoopt(); /* our sysvconsts definition */
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if (optname == -1) return 0; /* our sysvconsts definition */
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if (!IsWindows()) {
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do {
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if (setsockopt$sysv(fd, level, optname, optval, optlen) != -1) {
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return 0;
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}
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} while (setsockopt_polyfill(&optname));
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return -1;
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} else if (isfdkind(fd, kFdSocket)) {
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return setsockopt$nt(&g_fds.p[fd], level, optname, optval, optlen);
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} else {
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return ebadf();
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}
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}
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