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cosmopolitan/net/http/ismulticastip.c

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Add /statusz page to redbean plus other enhancements redbean improvements: - Explicitly disable corking - Simulate Python regex API for Lua - Send warmup requests in main process on startup - Add Class-A granular IPv4 network classification - Add /statusz page so you can monitor your redbean's health - Fix regressions on OpenBSD/NetBSD caused by recent changes - Plug Authorization header into Lua GetUser and GetPass APIs - Recognize X-Forwarded-{For,Host} from local reverse proxies - Add many additional functions to redbean Lua server page API - Report resource usage of child processes on `/` listing page - Introduce `-a` flag for logging child process resource usage - Introduce `-t MILLIS` flag and `ProgramTimeout(ms)` init API - Introduce `-H "Header: value"` flag and `ProgramHeader(k,v)` API Cosmopolitan Libc improvements: - Make strerror() simpler - Make inet_pton() not depend on sscanf() - Fix OpenExecutable() which broke .data section earlier - Fix stdio in cases where it overflows kernel tty buffer - Fix bugs in crash reporting w/o .com.dbg binary present - Add polyfills for SO_LINGER, SO_RCVTIMEO, and SO_SNDTIMEO - Polyfill TCP_CORK on BSD and XNU using TCP_NOPUSH magnums New netcat clone in examples/nc.c: While testing some of the failure conditions for redbean, I noticed that BusyBox's `nc` command is pretty busted, if you use it as an interactive tool, rather than having it be part of a pipeline. Unfortunately this'll only work on UNIX since Windows doesn't let us poll on stdio and sockets at the same time because I don't think they want tools like this running on their platform. So if you want forbidden fruit, it's here so enjoy it
2021-04-23 17:45:19 +00:00
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
flip et / noet in modelines `et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
2023-12-08 03:11:56 +00:00
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
Add /statusz page to redbean plus other enhancements redbean improvements: - Explicitly disable corking - Simulate Python regex API for Lua - Send warmup requests in main process on startup - Add Class-A granular IPv4 network classification - Add /statusz page so you can monitor your redbean's health - Fix regressions on OpenBSD/NetBSD caused by recent changes - Plug Authorization header into Lua GetUser and GetPass APIs - Recognize X-Forwarded-{For,Host} from local reverse proxies - Add many additional functions to redbean Lua server page API - Report resource usage of child processes on `/` listing page - Introduce `-a` flag for logging child process resource usage - Introduce `-t MILLIS` flag and `ProgramTimeout(ms)` init API - Introduce `-H "Header: value"` flag and `ProgramHeader(k,v)` API Cosmopolitan Libc improvements: - Make strerror() simpler - Make inet_pton() not depend on sscanf() - Fix OpenExecutable() which broke .data section earlier - Fix stdio in cases where it overflows kernel tty buffer - Fix bugs in crash reporting w/o .com.dbg binary present - Add polyfills for SO_LINGER, SO_RCVTIMEO, and SO_SNDTIMEO - Polyfill TCP_CORK on BSD and XNU using TCP_NOPUSH magnums New netcat clone in examples/nc.c: While testing some of the failure conditions for redbean, I noticed that BusyBox's `nc` command is pretty busted, if you use it as an interactive tool, rather than having it be part of a pipeline. Unfortunately this'll only work on UNIX since Windows doesn't let us poll on stdio and sockets at the same time because I don't think they want tools like this running on their platform. So if you want forbidden fruit, it's here so enjoy it
2021-04-23 17:45:19 +00:00
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "net/http/ip.h"
/**
* Returns true if IPv4 address is used for multicast.
*/
bool IsMulticastIp(uint32_t x) {
return (x >> 28) == 0xE; /* 224.0.0.0/4 */
}
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