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MINOR: sample: add hex converter

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This new filter converts BIN type to its hexadecimal
representation in STR type. It is used to keep the
compatibility with the original bin2str cast.

It will be useful when bin2str changes to copy the
string as-is without encoding anymore.
This commit is contained in:
Thierry FOURNIER 2014-03-12 15:01:52 +01:00 committed by Willy Tarreau
parent d048d8b891
commit 2f49d6d17b
2 changed files with 23 additions and 0 deletions
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5
doc/configuration.txt
View File

@ -9343,6 +9343,11 @@ The currently available list of transformation keywords include :
after a string sample fetch function or after a transformation
keyword returning a string type. The result is of type string.
hex Converts a binary input sample to an hex string containing two
hex digits per input byte. It is used to log or transfer hex
dumps of some binary input data in a way that can be reliably
transferred (eg: an SSL ID can be copied in a header).
ipmask(<mask>) Apply a mask to an IPv4 address, and use the result for
lookups and storage. This can be used to make all hosts within
a certain mask to share the same table entries and as such use

18
src/sample.c
View File

@ -1089,6 +1089,23 @@ struct sample *sample_fetch_string(struct proxy *px, struct session *l4, void *l
/* These functions set the data type on return. */
/*****************************************************************/
static int sample_conv_bin2hex(const struct arg *arg_p, struct sample *smp)
{
struct chunk *trash = get_trash_chunk();
unsigned char c;
int ptr = 0;
trash->len = 0;
while (ptr < smp->data.str.len && trash->len <= trash->size - 2) {
c = smp->data.str.str[ptr++];
trash->str[trash->len++] = hextab[(c >> 4) & 0xF];
trash->str[trash->len++] = hextab[c & 0xF];
}
smp->data.str = *trash;
smp->type = SMP_T_STR;
return 1;
}
static int sample_conv_str2lower(const struct arg *arg_p, struct sample *smp)
{
int i;
@ -1225,6 +1242,7 @@ static struct sample_fetch_kw_list smp_kws = {ILH, {
static struct sample_conv_kw_list sample_conv_kws = {ILH, {
{ "upper", sample_conv_str2upper, 0, NULL, SMP_T_STR, SMP_T_STR },
{ "lower", sample_conv_str2lower, 0, NULL, SMP_T_STR, SMP_T_STR },
{ "hex", sample_conv_bin2hex, 0, NULL, SMP_T_BIN, SMP_T_STR },
{ "ipmask", sample_conv_ipmask, ARG1(1,MSK4), NULL, SMP_T_IPV4, SMP_T_IPV4 },
{ NULL, NULL, 0, 0, 0 },
}};