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http_chunks: correct and clarify a comment on hexnumber length

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... and also rename the define for max length.

Closes #6489
This commit is contained in:
Daniel Stenberg 2021-01-19 14:23:11 +01:00
parent e71542a9d9
commit 13bc1ea9bc
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GPG Key ID: 5CC908FDB71E12C2
2 changed files with 6 additions and 6 deletions
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2
lib/http_chunks.c
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@ -137,7 +137,7 @@ CHUNKcode Curl_httpchunk_read(struct connectdata *conn,
switch(ch->state) {
case CHUNK_HEX:
if(isxdigit_ascii(*datap)) {
if(ch->hexindex < MAXNUM_SIZE) {
if(ch->hexindex < CHUNK_MAXNUM_LEN) {
ch->hexbuffer[ch->hexindex] = *datap;
datap++;
length--;

10
lib/http_chunks.h
View File

@ -7,7 +7,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
* Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
@ -26,10 +26,10 @@ struct connectdata;
/*
* The longest possible hexadecimal number we support in a chunked transfer.
* Weird enough, RFC2616 doesn't set a maximum size! Since we use strtoul()
* to convert it, we "only" support 2^32 bytes chunk data.
* Neither RFC2616 nor the later HTTP specs define a maximum chunk size.
* For 64 bit curl_off_t we support 16 digits. For 32 bit, 8 digits.
*/
#define MAXNUM_SIZE 16
#define CHUNK_MAXNUM_LEN (SIZEOF_CURL_OFF_T * 2)
typedef enum {
/* await and buffer all hexadecimal digits until we get one that isn't a
@ -83,7 +83,7 @@ typedef enum {
const char *Curl_chunked_strerror(CHUNKcode code);
struct Curl_chunker {
char hexbuffer[ MAXNUM_SIZE + 1];
char hexbuffer[ CHUNK_MAXNUM_LEN + 1]; /* +1 for null-terminator */
int hexindex;
ChunkyState state;
curl_off_t datasize;