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Add wpa_snprintf_hex_sep()

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This can be used to print a hexdump with the specified separator between
octets.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2015-03-29 22:27:43 +03:00
parent 5955cfaacd
commit 2c1cf90376
2 changed files with 27 additions and 0 deletions
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25
src/utils/common.c
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@ -277,6 +277,31 @@ int wpa_scnprintf(char *buf, size_t size, const char *fmt, ...)
return ret;
}
int wpa_snprintf_hex_sep(char *buf, size_t buf_size, const u8 *data, size_t len,
char sep)
{
size_t i;
char *pos = buf, *end = buf + buf_size;
int ret;
if (buf_size == 0)
return 0;
for (i = 0; i < len; i++) {
ret = os_snprintf(pos, end - pos, "%02x%c",
data[i], sep);
if (os_snprintf_error(end - pos, ret)) {
end[-1] = '\0';
return pos - buf;
}
pos += ret;
}
pos[-1] = '\0';
return pos - buf;
}
static inline int _wpa_snprintf_hex(char *buf, size_t buf_size, const u8 *data,
size_t len, int uppercase)
{

2
src/utils/common.h
View file

@ -480,6 +480,8 @@ int hexstr2bin(const char *hex, u8 *buf, size_t len);
void inc_byte_array(u8 *counter, size_t len);
void wpa_get_ntp_timestamp(u8 *buf);
int wpa_scnprintf(char *buf, size_t size, const char *fmt, ...);
int wpa_snprintf_hex_sep(char *buf, size_t buf_size, const u8 *data, size_t len,
char sep);
int wpa_snprintf_hex(char *buf, size_t buf_size, const u8 *data, size_t len);
int wpa_snprintf_hex_uppercase(char *buf, size_t buf_size, const u8 *data,
size_t len);