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c003f50122
Implement a standalone binary to be able to easily a hex-string QPACK stream. The binary must be compiled via the Makefile. Hex-strings are specified on stdin.
172 lines
3.4 KiB
C
172 lines
3.4 KiB
C
/*
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* QPACK stream decoder. Decode a series of hex codes on stdin using one line
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* per H3 HEADERS frame. Silently skip spaces, tabs, CR, '-' and ','.
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*
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* Compilation via Makefile
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*
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* Example run:
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* echo 0000d1d7508b089d5c0b8170dc101a699fc15f5085ed6989397f | ./dev/qpack/decode
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*/
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#include <ctype.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#define MAX_RQ_SIZE 65536
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#define MAX_HDR_NUM 1000
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#define QPACK_STANDALONE
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#define USE_OPENSSL
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#define USE_QUIC
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#include <haproxy/buf-t.h>
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#include <haproxy/http-hdr-t.h>
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#include <haproxy/qpack-dec.h>
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#include <haproxy/qpack-tbl.h>
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char line[MAX_RQ_SIZE * 3 + 3];
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uint8_t bin[MAX_RQ_SIZE];
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char tmp_buf[MAX_RQ_SIZE];
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struct buffer buf = { .area = tmp_buf, .data = 0, .size = sizeof(tmp_buf) };
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#define DEBUG_QPACK
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#include "../src/hpack-huff.c"
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#include "../src/qpack-dec.c"
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#include "../src/qpack-tbl.c"
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/* define to compile with BUG_ON/ABORT_NOW statements */
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void ha_backtrace_to_stderr(void)
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{
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}
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/* taken from dev/hpack/decode.c */
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int hex2bin(const char *hex, uint8_t *bin, int size)
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{
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int a, b, c;
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uint8_t code;
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int len = 0;
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a = b = -1;
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for (; *hex; hex++) {
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c = *hex;
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if (c == ' ' || c == '\t' || c == '\r' ||
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c == '-' || c == ',')
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continue;
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if (c == '\n' || c == '#')
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break;
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if (c >= '0' && c <= '9')
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c -= '0';
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else if (c >= 'a' && c <= 'f')
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c -= 'a' - 10;
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else if (c >= 'A' && c <= 'F')
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c -= 'A' - 10;
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else
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return -1;
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if (a == -1)
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a = c;
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else
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b = c;
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if (b == -1)
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continue;
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code = (a << 4) | b;
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a = b = -1;
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if (len >= size)
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return -2;
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bin[len] = code;
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len++;
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}
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if (a >= 0 || b >= 0)
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return -3;
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return len;
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}
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/* taken from src/tools.c */
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void debug_hexdump(FILE *out, const char *pfx, const char *buf,
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unsigned int baseaddr, int len)
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{
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unsigned int i;
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int b, j;
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for (i = 0; i < (len + (baseaddr & 15)); i += 16) {
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b = i - (baseaddr & 15);
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fprintf(out, "%s%08x: ", pfx ? pfx : "", i + (baseaddr & ~15));
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for (j = 0; j < 8; j++) {
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if (b + j >= 0 && b + j < len)
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fprintf(out, "%02x ", (unsigned char)buf[b + j]);
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else
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fprintf(out, " ");
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}
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if (b + j >= 0 && b + j < len)
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fputc('-', out);
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else
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fputc(' ', out);
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for (j = 8; j < 16; j++) {
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if (b + j >= 0 && b + j < len)
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fprintf(out, " %02x", (unsigned char)buf[b + j]);
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else
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fprintf(out, " ");
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}
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fprintf(out, " ");
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for (j = 0; j < 16; j++) {
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if (b + j >= 0 && b + j < len) {
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if (isprint((unsigned char)buf[b + j]))
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fputc((unsigned char)buf[b + j], out);
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else
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fputc('.', out);
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}
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else
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fputc(' ', out);
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}
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fputc('\n', out);
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}
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}
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int main(int argc, char **argv)
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{
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struct http_hdr hdrs[MAX_HDR_NUM];
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int len, outlen, hdr_idx;
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do {
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if (!fgets(line, sizeof(line), stdin))
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break;
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if ((len = hex2bin(line, bin, MAX_RQ_SIZE)) < 0)
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break;
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outlen = qpack_decode_fs(bin, len, &buf, hdrs,
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sizeof(hdrs) / sizeof(hdrs[0]));
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if (outlen < 0) {
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fprintf(stderr, "QPACK decoding failed: %d\n", outlen);
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continue;
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}
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hdr_idx = 0;
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fprintf(stderr, "<<< Found %d headers:\n", outlen);
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while (1) {
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if (isteq(hdrs[hdr_idx].n, ist("")))
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break;
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fprintf(stderr, "%.*s: %.*s\n",
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(int)hdrs[hdr_idx].n.len, hdrs[hdr_idx].n.ptr,
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(int)hdrs[hdr_idx].v.len, hdrs[hdr_idx].v.ptr);
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++hdr_idx;
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}
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} while (1);
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return EXIT_SUCCESS;
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}
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