MINOR: sample: add hex converter
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.
diff --git a/doc/configuration.txt b/doc/configuration.txt
index a8ff839..81a5099 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -9343,6 +9343,11 @@
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
diff --git a/src/sample.c b/src/sample.c
index 7f121b3..3812913 100644
--- a/src/sample.c
+++ b/src/sample.c
@@ -1089,6 +1089,23 @@
/* 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_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 },
}};