Remove copy of kumina implementation.
The canonical location is https://github.com/kumina/wsproxy There are now several external implementations of Websockify that I link to from https://github.com/kanaka/websockify/wiki/Feature_Matrix
This commit is contained in:
Joel Martin
parent
7ea468b5d7
commit
9fcd92c39a
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@ -1,4 +1,4 @@
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TARGETS=websockify kumina
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TARGETS=websockify
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CFLAGS += -fPIC
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all: $(TARGETS)
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@ -9,9 +9,6 @@ websockify: websockify.o websocket.o
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websocket.o: websocket.c websocket.h
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websockify.o: websockify.c websocket.h
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kumina: kumina.o
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$(CC) $(LDFLAGS) $^ -lresolv -lssl -o $@
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clean:
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rm -f websockify kumina *.o
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601
other/kumina.c
601
other/kumina.c
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@ -1,601 +0,0 @@
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/*-
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* Copyright (c) 2011 Ed Schouten <ed@kumina.nl>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <assert.h>
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#include <fcntl.h>
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#include <resolv.h>
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#include <signal.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <openssl/md5.h>
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#include <openssl/sha.h>
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#define MAXOFRAME UINT16_MAX
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#define HYBI10_ACCEPTHDRLEN 29
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#ifdef DEBUG
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#define DPRINTF(fmt, ...) fprintf(stderr, fmt "\n", ## __VA_ARGS__)
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#else
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#define DPRINTF(fmt, ...)
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#endif
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static pid_t other = -1;
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static int hybi10 = 0;
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static void
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die(int exitcode)
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{
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if (other != -1)
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kill(other, SIGTERM);
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exit(exitcode);
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: wsproxy minport maxport\n");
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exit(1);
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}
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static unsigned char
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pgetc(FILE *fp)
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{
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int ret;
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ret = fgetc(fp);
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if (ret == EOF)
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die(0);
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return (ret);
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}
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static void
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putb64(FILE *out, const char *inb, size_t *inblen)
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{
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char inbuf[5] = { 0 };
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unsigned char outbuf[3];
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ssize_t outbuflen;
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if (*inblen == 0)
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return;
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assert(*inblen <= 4);
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memcpy(inbuf, inb, *inblen);
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outbuflen = b64_pton(inbuf, outbuf, sizeof outbuf);
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if (outbuflen <= 0) {
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DPRINTF("invalid Base64 data");
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die(1);
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}
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if (fwrite(outbuf, outbuflen, 1, out) != 1) {
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perror("fwrite");
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die(1);
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}
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*inblen = 0;
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}
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/*
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* Support for HyBi10.
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*/
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static void
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hybi10_calcaccepthdr(const char *key, char *out)
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{
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SHA_CTX c;
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unsigned char hash[SHA_DIGEST_LENGTH];
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int r;
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SHA1_Init(&c);
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SHA1_Update(&c, key, strlen(key));
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SHA1_Update(&c, "258EAFA5-E914-47DA-95CA-C5AB0DC85B11", 36);
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SHA1_Final(hash, &c);
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r = b64_ntop(hash, sizeof hash, out, HYBI10_ACCEPTHDRLEN);
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assert(r == HYBI10_ACCEPTHDRLEN - 1);
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}
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static uint64_t
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hybi10_getlength(FILE *in)
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{
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uint64_t len;
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int lenlen;
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unsigned char ch;
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ch = pgetc(in);
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if (!(ch & 0x80)) {
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DPRINTF("mask bit not set");
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die(1);
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}
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ch &= ~0x80;
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/* Two or eight bytes of input length? */
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switch (ch) {
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case 126:
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lenlen = 2;
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break;
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case 127:
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lenlen = 8;
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break;
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default:
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/* Small packet, length encoded directly. */
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return (ch);
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}
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len = 0;
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while (lenlen-- > 0)
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len = len << 8 | pgetc(in);
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return (len);
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}
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static void
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hybi10_getmasks(FILE *in, unsigned char masks[4])
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{
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int i;
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for (i = 0; i < 4; i++)
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masks[i] = pgetc(in);
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}
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static void
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hybi10_decode(FILE *in, int outfd)
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{
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FILE *out;
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unsigned char ch, masks[4];
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char inb[4];
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size_t inblen = 0;
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uint64_t i, framelen;
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out = fdopen(outfd, "w");
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if (out == NULL) {
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perror("fdopen");
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die(1);
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}
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for (;;) {
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/* Frame header. */
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ch = pgetc(in);
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if (ch != 0x81) {
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DPRINTF("unsupported packet received: %#hhx", ch);
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die(1);
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}
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/* Payload length. */
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framelen = hybi10_getlength(in);
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hybi10_getmasks(in, masks);
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for (i = 0; i < framelen; i++) {
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ch = pgetc(in) ^ masks[i % 4];
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if (!((ch >= 'A' && ch <= 'Z') ||
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(ch >= 'a' && ch <= 'z') ||
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(ch >= '0' && ch <= '9') ||
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ch == '+' || ch == '/' || ch == '=')) {
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DPRINTF("non-Base64 character received");
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die(1);
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}
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/* Base64 character. */
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inb[inblen++] = ch;
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if (inblen == sizeof inb)
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putb64(out, inb, &inblen);
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}
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/* Frame trailer. */
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putb64(out, inb, &inblen);
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if (fflush(out) == -1) {
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perror("fflush");
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die(1);
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}
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}
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}
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static void
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hybi10_encode(int in, int out)
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{
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unsigned char inbuf[MAXOFRAME / 4 * 3];
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char outbuf[MAXOFRAME + 5]; /* Four-byte header + nul. */
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ssize_t len, wlen;
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for (;;) {
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len = read(in, inbuf, sizeof inbuf);
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if (len == -1) {
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perror("read");
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die(1);
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} else if (len == 0)
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die(0);
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/* Encode data as Base64. */
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len = b64_ntop(inbuf, len, outbuf + 4, sizeof outbuf - 4);
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assert(len > 0 && len <= MAXOFRAME);
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/* Frame header. */
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outbuf[0] = 0x81;
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outbuf[1] = 126;
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outbuf[2] = len >> 8;
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outbuf[3] = len;
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len += 4;
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wlen = write(out, outbuf, len);
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if (wlen == -1) {
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perror("write");
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die(1);
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} else if (wlen != len)
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die(0);
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}
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}
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/*
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* Support for Hixie 76.
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*/
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static void
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hixie76_calcresponse(uint32_t key1, uint32_t key2, const char *key3, char *out)
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{
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MD5_CTX c;
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char in[16] = {
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key1 >> 24, key1 >> 16, key1 >> 8, key1,
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key2 >> 24, key2 >> 16, key2 >> 8, key2,
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key3[0], key3[1], key3[2], key3[3],
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key3[4], key3[5], key3[6], key3[7]
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};
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MD5_Init(&c);
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MD5_Update(&c, (void *)in, sizeof in);
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MD5_Final((void *)out, &c);
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}
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static void
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hixie76_decode(FILE *in, int outfd)
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{
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FILE *out;
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unsigned char ch;
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char inb[4];
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size_t inblen = 0;
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out = fdopen(outfd, "w");
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if (out == NULL) {
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perror("fdopen");
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die(1);
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}
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for (;;) {
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/* Frame header. */
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ch = pgetc(in);
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if (ch != 0x00) {
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DPRINTF("unsupported packet received: %#hhx", ch);
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die(1);
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}
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while ((ch = pgetc(in)) != 0xff) {
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if (!((ch >= 'A' && ch <= 'Z') ||
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(ch >= 'a' && ch <= 'z') ||
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(ch >= '0' && ch <= '9') ||
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ch == '+' || ch == '/' || ch == '=')) {
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DPRINTF("non-Base64 character received");
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die(1);
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}
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/* Base64 character. */
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inb[inblen++] = ch;
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if (inblen == sizeof inb)
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putb64(out, inb, &inblen);
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}
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/* Frame trailer. */
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putb64(out, inb, &inblen);
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if (fflush(out) == -1) {
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perror("fflush");
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die(1);
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}
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}
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}
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static void
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hixie76_encode(int in, int out)
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{
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unsigned char inbuf[MAXOFRAME / 4 * 3];
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char outbuf[MAXOFRAME + 2];
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ssize_t len, wlen;
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for (;;) {
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len = read(in, inbuf, sizeof inbuf);
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if (len == -1) {
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perror("read");
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die(1);
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} else if (len == 0)
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die(0);
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/* Frame header. */
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outbuf[0] = 0x00;
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/* Encode data as Base64. */
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len = b64_ntop(inbuf, len, outbuf + 1, sizeof outbuf - 1);
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assert(len > 0 && len <= MAXOFRAME);
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/* Frame trailer. */
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outbuf[len + 1] = 0xff;
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wlen = write(out, outbuf, len + 2);
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if (wlen == -1) {
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perror("write");
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die(1);
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} else if (wlen != len + 2)
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die(0);
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}
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}
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|
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static char *
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do_strndup(const char *str, size_t n)
|
||||
{
|
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size_t len;
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char *copy;
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|
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for (len = 0; len < n && str[len]; len++)
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continue;
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|
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if ((copy = malloc(len + 1)) == NULL)
|
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return (NULL);
|
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memcpy(copy, str, len);
|
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copy[len] = '\0';
|
||||
return (copy);
|
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}
|
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|
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static char *
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parsestring(const char *in)
|
||||
{
|
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size_t len;
|
||||
|
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len = strlen(in);
|
||||
if (len > 0 && in[len - 1] == '\n')
|
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len--;
|
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if (len > 0 && in[len - 1] == '\r')
|
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len--;
|
||||
if (len == 0)
|
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return (NULL);
|
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return (do_strndup(in, len));
|
||||
}
|
||||
|
||||
static uint32_t
|
||||
parsehdrkey(const char *key)
|
||||
{
|
||||
uint32_t sum = 0, spaces = 0;
|
||||
|
||||
for (; *key != '\0'; key++) {
|
||||
if (*key >= '0' && *key <= '9')
|
||||
sum = sum * 10 + *key - '0';
|
||||
else if (*key == ' ')
|
||||
spaces++;
|
||||
}
|
||||
return (spaces == 0 ? 0 : sum / spaces);
|
||||
}
|
||||
|
||||
static void
|
||||
eat_flash_magic(void)
|
||||
{
|
||||
static const char flash_magic[] = "<policy-file-request/>";
|
||||
size_t i;
|
||||
char ch;
|
||||
|
||||
for (i = 0; i < sizeof flash_magic - 1; i++) {
|
||||
ch = pgetc(stdin);
|
||||
/* Not a Flash applet. Roll back. */
|
||||
if (ch != flash_magic[i]) {
|
||||
ungetc(ch, stdin);
|
||||
while (i-- > 0)
|
||||
ungetc(flash_magic[i], stdin);
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
printf("<cross-domain-policy>"
|
||||
"<allow-access-from domain=\"*\" to-ports=\"*\"/>"
|
||||
"</cross-domain-policy>\n");
|
||||
exit(0);
|
||||
}
|
||||
|
||||
int
|
||||
main(int argc, char *argv[])
|
||||
{
|
||||
union {
|
||||
struct sockaddr sa;
|
||||
struct sockaddr_in sa_in;
|
||||
struct sockaddr_in6 sa_in6;
|
||||
} sa;
|
||||
char line[512], key3[8], *host = NULL,
|
||||
*origin = NULL, *key = NULL, *protocol;
|
||||
unsigned long minport, maxport, port;
|
||||
uint32_t key1 = 0, key2 = 0;
|
||||
socklen_t salen;
|
||||
pid_t pid;
|
||||
int fd, monitoring = 0, s;
|
||||
|
||||
/* Squelch stderr when it is a socket. */
|
||||
if (!isatty(STDERR_FILENO)) {
|
||||
fd = open("/dev/null", O_WRONLY);
|
||||
if (fd == -1) {
|
||||
perror("open");
|
||||
return (1);
|
||||
}
|
||||
if (fd != STDERR_FILENO) {
|
||||
dup2(fd, STDERR_FILENO);
|
||||
close(fd);
|
||||
}
|
||||
}
|
||||
|
||||
if (argc != 3)
|
||||
usage();
|
||||
minport = strtoul(argv[1], NULL, 10);
|
||||
maxport = strtoul(argv[2], NULL, 10);
|
||||
if (1 > minport || minport > maxport || maxport > 65535)
|
||||
usage();
|
||||
|
||||
eat_flash_magic();
|
||||
|
||||
/* GET / header. */
|
||||
if (fgets(line, sizeof line, stdin) == NULL) {
|
||||
perror("fgets");
|
||||
return (1);
|
||||
}
|
||||
if (strncmp(line, "GET /", 5) != 0) {
|
||||
DPRINTF("malformed HTTP header received");
|
||||
return (1);
|
||||
}
|
||||
if (strncmp(line, "GET /wsproxy-monitoring/ ", 25) == 0) {
|
||||
monitoring = 1;
|
||||
port = 0; /* Keep compiler happy. */
|
||||
} else if (minport == maxport) {
|
||||
/* Simply ignore URL and connect to a single host. */
|
||||
port = minport;
|
||||
} else {
|
||||
/* Multiplexing mode. Use port number in URL. */
|
||||
port = strtoul(line + 5, NULL, 10);
|
||||
if (port < minport || port > maxport) {
|
||||
DPRINTF("port not allowed");
|
||||
return (1);
|
||||
}
|
||||
}
|
||||
|
||||
/* Parse HTTP headers. */
|
||||
do {
|
||||
if (fgets(line, sizeof line, stdin) == NULL) {
|
||||
DPRINTF("partial HTTP header received");
|
||||
return (1);
|
||||
}
|
||||
if (strncasecmp(line, "Host: ", 6) == 0) {
|
||||
host = parsestring(line + 6);
|
||||
} else if (strncasecmp(line, "Origin: ", 8) == 0) {
|
||||
origin = parsestring(line + 8);
|
||||
} else if (strncasecmp(line, "Sec-WebSocket-Key: ", 19) == 0) {
|
||||
hybi10 = 1;
|
||||
key = parsestring(line + 19);
|
||||
} else if (strncasecmp(line, "Sec-WebSocket-Key1: ", 20) == 0) {
|
||||
key1 = parsehdrkey(line + 20);
|
||||
} else if (strncasecmp(line, "Sec-WebSocket-Key2: ", 20) == 0) {
|
||||
key2 = parsehdrkey(line + 20);
|
||||
} else if (strncasecmp(line, "Sec-WebSocket-Protocol: ",
|
||||
24) == 0) {
|
||||
protocol = parsestring(line + 24);
|
||||
if (strcmp(protocol, "base64") != 0) {
|
||||
DPRINTF("Unsupported protocol: %s", protocol);
|
||||
return (1);
|
||||
}
|
||||
}
|
||||
} while (strcmp(line, "\n") != 0 && strcmp(line, "\r\n") != 0);
|
||||
|
||||
/* Simple monitoring. */
|
||||
if (monitoring) {
|
||||
printf("HTTP/1.1 200 OK\r\n"
|
||||
"Content-Type: text/plain\r\n"
|
||||
"\r\n"
|
||||
"RUNNING\n");
|
||||
return (0);
|
||||
}
|
||||
|
||||
/* Eight byte payload. */
|
||||
if (!hybi10)
|
||||
if (fread(key3, sizeof key3, 1, stdin) != 1) {
|
||||
DPRINTF("key data missing");
|
||||
return (1);
|
||||
}
|
||||
|
||||
/* Use our own address. Fall back to 127.0.0.1 on failure. */
|
||||
salen = sizeof sa;
|
||||
if (getsockname(STDIN_FILENO, &sa.sa, &salen) == -1) {
|
||||
salen = sizeof sa.sa_in;
|
||||
memset(&sa.sa_in, 0, salen);
|
||||
sa.sa_in.sin_family = AF_INET;
|
||||
sa.sa_in.sin_addr.s_addr = inet_addr("127.0.0.1");
|
||||
}
|
||||
switch (sa.sa.sa_family) {
|
||||
case AF_INET:
|
||||
sa.sa_in.sin_port = htons(port);
|
||||
break;
|
||||
case AF_INET6:
|
||||
sa.sa_in6.sin6_port = htons(port);
|
||||
break;
|
||||
default:
|
||||
/* Unknown protocol. */
|
||||
DPRINTF("unsupported network protocol");
|
||||
return (1);
|
||||
}
|
||||
s = socket(sa.sa.sa_family, SOCK_STREAM, 0);
|
||||
if (s == -1) {
|
||||
perror("socket");
|
||||
return (1);
|
||||
}
|
||||
if (connect(s, &sa.sa, salen) == -1) {
|
||||
perror("connect");
|
||||
return (1);
|
||||
}
|
||||
|
||||
/* Send HTTP response, based on protocol version. */
|
||||
if (hybi10) {
|
||||
char accepthdr[HYBI10_ACCEPTHDRLEN];
|
||||
|
||||
hybi10_calcaccepthdr(key, accepthdr);
|
||||
printf("HTTP/1.1 101 Switching Protocols\r\n"
|
||||
"Upgrade: websocket\r\n"
|
||||
"Connection: Upgrade\r\n"
|
||||
"Sec-WebSocket-Accept: %s\r\n"
|
||||
"Sec-WebSocket-Protocol: base64\r\n\r\n", accepthdr);
|
||||
} else {
|
||||
char response[MD5_DIGEST_LENGTH];
|
||||
|
||||
hixie76_calcresponse(key1, key2, key3, response);
|
||||
printf("HTTP/1.1 101 WebSocket Protocol Handshake\r\n"
|
||||
"Upgrade: WebSocket\r\n"
|
||||
"Connection: Upgrade\r\n"
|
||||
"Sec-WebSocket-Origin: %s\r\n"
|
||||
"Sec-WebSocket-Location: ws://%s/%lu\r\n"
|
||||
"Sec-WebSocket-Protocol: base64\r\n\r\n",
|
||||
origin, host, port);
|
||||
fwrite(response, sizeof response, 1, stdout);
|
||||
}
|
||||
fflush(stdout);
|
||||
|
||||
/* Spawn child process for bi-directional pipe. */
|
||||
pid = fork();
|
||||
if (pid == -1) {
|
||||
perror("fork");
|
||||
return (1);
|
||||
} else if (pid == 0) {
|
||||
other = getppid();
|
||||
if (hybi10)
|
||||
hybi10_decode(stdin, s);
|
||||
else
|
||||
hixie76_decode(stdin, s);
|
||||
} else {
|
||||
other = pid;
|
||||
if (hybi10)
|
||||
hybi10_encode(s, STDOUT_FILENO);
|
||||
else
|
||||
hixie76_encode(s, STDOUT_FILENO);
|
||||
}
|
||||
assert(0);
|
||||
}
|
||||
Loading…
Reference in New Issue