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utils: Add ssid_parse() function

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Add a function that parses SSID in text or hex format. In case of the
text format, the SSID is enclosed in double quotes. In case of the hex
format, the SSID must include only hex digits and not be enclosed in
double quotes. The input string may include other arguments after the
SSID.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
This commit is contained in:
David Spinadel 2016-04-06 19:42:04 +03:00 • committed by Jouni Malinen
parent e4fbc8d423
commit 624b8a061f
4 changed files with 56 additions and 7 deletions
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48
src/utils/common.c
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@ -1123,3 +1123,51 @@ int is_ctrl_char(char c)
{
return c > 0 && c < 32;
}
/**
* ssid_parse - Parse a string that contains SSID in hex or text format
* @buf: Input NULL terminated string that contains the SSID
* @ssid: Output SSID
* Returns: 0 on success, -1 otherwise
*
* The SSID has to be enclosed in double quotes for the text format or space
* or NULL terminated string of hex digits for the hex format. buf can include
* additional arguments after the SSID.
*/
int ssid_parse(const char *buf, struct wpa_ssid_value *ssid)
{
char *tmp, *res, *end;
size_t len;
ssid->ssid_len = 0;
tmp = os_strdup(buf);
if (!tmp)
return -1;
if (*tmp != '"') {
end = os_strchr(tmp, ' ');
if (end)
*end = '\0';
} else {
end = os_strchr(tmp + 1, '"');
if (!end) {
os_free(tmp);
return -1;
}
end[1] = '\0';
}
res = wpa_config_parse_string(tmp, &len);
if (res && len <= SSID_MAX_LEN) {
ssid->ssid_len = len;
os_memcpy(ssid->ssid, res, len);
}
os_free(tmp);
os_free(res);
return ssid->ssid_len ? 0 : -1;
}