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https://github.com/jart/cosmopolitan.git
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b107d2709f
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
76 lines
3 KiB
C
76 lines
3 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 2021 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/str/str.h"
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#include "net/http/http.h"
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/**
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* Parses X-Forwarded-For.
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*
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* This header is used by reverse proxies. For example:
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*
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* X-Forwarded-For: 203.0.113.42:31337
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*
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* @param s is input data
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* @param n if -1 implies strlen
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* @param ip receives ip on success if not NULL
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* @param port receives port on success if not NULL
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* @return 0 on success or -1 on failure
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* @see RFC7239's poorly designed Forwarded header
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*/
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int ParseForwarded(const char *s, size_t n, uint32_t *ip, uint16_t *port) {
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size_t i;
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uint32_t x;
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int c, j, t;
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if (n == -1) n = s ? strlen(s) : 0;
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for (t = x = j = i = 0; i < n;) {
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c = s[i++] & 255;
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if (isdigit(c)) {
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t *= 10;
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t += c - '0';
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if (t > 255) return -1;
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} else if (c == '.') {
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x <<= 8;
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x |= t;
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t = 0;
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++j;
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} else if (c == ':') {
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x <<= 8;
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x |= t;
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t = 0;
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if (j != 3) return -1;
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while (i < n) {
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c = s[i++] & 255;
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if (isdigit(c)) {
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t *= 10;
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t += c - '0';
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if (t > 65535) return -1;
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} else {
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return -1;
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}
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}
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if (!x || !t) return -1;
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if (ip) *ip = x;
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if (port) *port = t;
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return 0;
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} else {
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return -1;
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}
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}
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return -1;
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}
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