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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* misc.c Miscellaneous TIPC helper functions.
*
* Authors: Richard Alpe <richard.alpe@ericsson.com>
*/
#include <stdio.h>
#include <stdint.h>
#include <linux/tipc.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <unistd.h>
#include <errno.h>
#include "misc.h"
#define IN_RANGE(val, low, high) ((val) <= (high) && (val) >= (low))
uint32_t str2addr(char *str)
{
unsigned int z, c, n;
char dummy;
if (sscanf(str, "%u.%u.%u%c", &z, &c, &n, &dummy) != 3) {
fprintf(stderr, "invalid network address, syntax: Z.C.N\n");
return 0;
}
if (IN_RANGE(z, 0, 255) && IN_RANGE(c, 0, 4095) && IN_RANGE(n, 0, 4095))
return tipc_addr(z, c, n);
fprintf(stderr, "invalid network address \"%s\"\n", str);
return 0;
}
static int is_hex(char *arr, int last)
{
int i;
while (!arr[last])
last--;
for (i = 0; i <= last; i++) {
if (!IN_RANGE(arr[i], '0', '9') &&
!IN_RANGE(arr[i], 'a', 'f') &&
!IN_RANGE(arr[i], 'A', 'F'))
return 0;
}
return 1;
}
static int is_name(char *arr, int last)
{
int i;
char c;
while (!arr[last])
last--;
if (last > 15)
return 0;
for (i = 0; i <= last; i++) {
c = arr[i];
if (!IN_RANGE(c, '0', '9') && !IN_RANGE(c, 'a', 'z') &&
!IN_RANGE(c, 'A', 'Z') && c != '-' && c != '_' &&
c != '.' && c != ':' && c != '@')
return 0;
}
return 1;
}
int str2nodeid(char *str, uint8_t *id)
{
int len = strlen(str);
int i;
if (len > 32)
return -1;
if (is_name(str, len - 1)) {
memcpy(id, str, len);
return 0;
}
if (!is_hex(str, len - 1))
return -1;
str[len] = '0';
for (i = 0; i < 16; i++) {
if (sscanf(&str[2 * i], "%2hhx", &id[i]) != 1)
break;
}
return 0;
}
int str2key(char *str, struct tipc_aead_key *key)
{
int len = strlen(str);
int ishex = 0;
int i;
/* Check if the input is a hex string (i.e. 0x...) */
if (len > 2 && strncmp(str, "0x", 2) == 0) {
ishex = is_hex(str + 2, len - 2 - 1);
if (ishex) {
len -= 2;
str += 2;
}
}
key->keylen = ishex ? (len + 1) / 2 : len;
if (key->keylen > TIPC_AEAD_KEYLEN_MAX)
return -1;
/* Obtain key: */
if (!ishex) {
memcpy(key->key, str, len);
} else {
/* Convert hex string to key */
for (i = 0; i < key->keylen; i++) {
if (i == 0 && len % 2 != 0) {
if (sscanf(str, "%1hhx", &key->key[0]) != 1)
return -1;
str += 1;
continue;
}
if (sscanf(str, "%2hhx", &key->key[i]) != 1)
return -1;
str += 2;
}
}
return 0;
}
void nodeid2str(uint8_t *id, char *str)
{
int i;
if (is_name((char *)id, 15)) {
memcpy(str, id, 16);
return;
}
for (i = 0; i < 16; i++)
sprintf(&str[2 * i], "%02x", id[i]);
for (i = 31; str[i] == '0'; i--)
str[i] = 0;
}
void hash2nodestr(uint32_t hash, char *str)
{
struct tipc_sioc_nodeid_req nr = {};
int sd;
sd = socket(AF_TIPC, SOCK_RDM, 0);
if (sd < 0) {
fprintf(stderr, "opening TIPC socket: %s\n", strerror(errno));
return;
}
nr.peer = hash;
if (!ioctl(sd, SIOCGETNODEID, &nr))
nodeid2str((uint8_t *)nr.node_id, str);
close(sd);
}
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