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storage: Encode SSIDs in file names if necessary

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SSIDs with characters other than A-Z0-9_- and space are encoded with
l_util_hexstring and prefixed with a = sign to differentiate them.
This commit is contained in:
Andrew Zaborowski 2016-05-24 00:54:08 +02:00 committed by Denis Kenzior
parent fc7ca17558
commit 176a5bcf76
1 changed files with 31 additions and 6 deletions
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37
src/storage.c
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@ -33,6 +33,7 @@
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <ctype.h>
#include <ell/ell.h>
@ -167,6 +168,29 @@ error_create_dirs:
return r;
}
static char *get_network_file_path(const char *type, const char *ssid)
{
char *path;
const char *c;
char *hex = NULL;
for (c = ssid; *c; c++)
if (!isalnum(*c) && !strchr("-_ ", *c))
break;
if (*c) {
hex = l_util_hexstring((const unsigned char *) ssid,
strlen(ssid));
path = l_strdup_printf(STORAGEDIR "/=%s.%s", hex, type);
l_free(hex);
} else
path = l_strdup_printf(STORAGEDIR "/%s.%s", ssid, type);
return path;
}
struct l_settings *storage_network_open(const char *type, const char *ssid)
{
struct l_settings *settings;
@ -175,8 +199,7 @@ struct l_settings *storage_network_open(const char *type, const char *ssid)
if (ssid == NULL || type == NULL)
return NULL;
/* TODO: Handle SSID's with filesystem-reserved characters */
path = l_strdup_printf(STORAGEDIR "/%s.%s", ssid, type);
path = get_network_file_path(type, ssid);
settings = l_settings_new();
l_settings_load_from_file(settings, path);
@ -193,7 +216,7 @@ int storage_network_touch(const char *type, const char *ssid)
if (ssid == NULL || type == NULL)
return -EINVAL;
path = l_strdup_printf(STORAGEDIR "/%s.%s", ssid, type);
path = get_network_file_path(type, ssid);
ret = utimensat(0, path, NULL, 0);
l_free(path);
@ -213,7 +236,7 @@ int storage_network_get_mtime(const char *type, const char *ssid,
if (ssid == NULL || type == NULL)
return -EINVAL;
path = l_strdup_printf(STORAGEDIR "/%s.%s", ssid, type);
path = get_network_file_path(type, ssid);
ret = stat(path, &sb);
l_free(path);
@ -234,9 +257,11 @@ void storage_network_sync(const char *type, const char *ssid,
{
char *data;
size_t length = 0;
char *path;
/* TODO: Handle SSID's with filesystem-reserved characters */
path = get_network_file_path(type, ssid);
data = l_settings_to_data(settings, &length);
write_file(data, length, STORAGEDIR "/%s.%s", ssid, type);
write_file(data, length, "%s", path);
l_free(data);
l_free(path);
}