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/*
* netifd - network interface daemon
* Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <string.h>
#include <stdlib.h>
#include "utils.h"
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/socket.h>
#ifdef __APPLE__
#include <libproc.h>
#endif
void
__vlist_simple_init(struct vlist_simple_tree *tree, int offset)
{
INIT_LIST_HEAD(&tree->list);
tree->version = 1;
tree->head_offset = offset;
}
void
vlist_simple_delete(struct vlist_simple_tree *tree, struct vlist_simple_node *node)
{
char *ptr;
list_del(&node->list);
ptr = (char *) node - tree->head_offset;
free(ptr);
}
void
vlist_simple_flush(struct vlist_simple_tree *tree)
{
struct vlist_simple_node *n, *tmp;
list_for_each_entry_safe(n, tmp, &tree->list, list) {
if ((n->version == tree->version || n->version == -1) &&
tree->version != -1)
continue;
vlist_simple_delete(tree, n);
}
}
void
vlist_simple_replace(struct vlist_simple_tree *dest, struct vlist_simple_tree *old)
{
struct vlist_simple_node *n, *tmp;
vlist_simple_update(dest);
list_for_each_entry_safe(n, tmp, &old->list, list) {
list_del(&n->list);
vlist_simple_add(dest, n);
}
vlist_simple_flush(dest);
}
void
vlist_simple_flush_all(struct vlist_simple_tree *tree)
{
tree->version = -1;
vlist_simple_flush(tree);
}
unsigned int
parse_netmask_string(const char *str, bool v6)
{
struct in_addr addr;
unsigned int ret;
char *err = NULL;
if (!strchr(str, '.')) {
ret = strtoul(str, &err, 0);
if (err && *err)
goto error;
return ret;
}
if (v6)
goto error;
if (inet_aton(str, &addr) != 1)
goto error;
return 32 - fls(~(ntohl(addr.s_addr)));
error:
return ~0;
}
bool
split_netmask(char *str, unsigned int *netmask, bool v6)
{
char *delim = strchr(str, '/');
if (delim) {
*(delim++) = 0;
*netmask = parse_netmask_string(delim, v6);
}
return true;
}
int
parse_ip_and_netmask(int af, const char *str, void *addr, unsigned int *netmask)
{
char *astr = alloca(strlen(str) + 1);
strcpy(astr, str);
if (!split_netmask(astr, netmask, af == AF_INET6))
return 0;
if (af == AF_INET6) {
if (*netmask > 128)
return 0;
} else {
if (*netmask > 32)
return 0;
}
return inet_pton(af, astr, addr);
}
char *
format_macaddr(uint8_t *mac)
{
static char str[sizeof("ff:ff:ff:ff:ff:ff ")];
snprintf(str, sizeof(str), "%02x:%02x:%02x:%02x:%02x:%02x",
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
return str;
}
uint32_t
crc32_file(FILE *fp)
{
static uint32_t *crcvals = NULL;
if (!crcvals) {
crcvals = malloc(sizeof(*crcvals) * 256);
for (size_t i = 0; i < 256; ++i) {
uint32_t c = i;
for (size_t j = 0; j < 8; ++j)
c = (c & 1) ? (0xEDB88320 ^ (c >> 1)) : (c >> 1);
crcvals[i] = c;
}
}
uint8_t buf[1024];
size_t len;
uint32_t c = 0xFFFFFFFF;
do {
len = fread(buf, 1, sizeof(buf), fp);
for (size_t i = 0; i < len; ++i)
c = crcvals[(c ^ buf[i]) & 0xFF] ^ (c >> 8);
} while (len == sizeof(buf));
return c ^ 0xFFFFFFFF;
}
bool check_pid_path(int pid, const char *exe)
{
const char deleted[] = " (deleted)";
const int deleted_len = strlen(deleted);
int proc_exe_len;
int exe_len = strlen(exe);
#ifdef __APPLE__
char proc_exe_buf[PROC_PIDPATHINFO_SIZE];
proc_exe_len = proc_pidpath(pid, proc_exe_buf, sizeof(proc_exe_buf));
#else
char proc_exe[32];
char *proc_exe_buf = alloca(exe_len);
sprintf(proc_exe, "/proc/%d/exe", pid);
proc_exe_len = readlink(proc_exe, proc_exe_buf, exe_len);
#endif
if (proc_exe_len == exe_len)
return !memcmp(exe, proc_exe_buf, exe_len);
else if (proc_exe_len == exe_len + deleted_len)
return !memcmp(exe, proc_exe_buf, exe_len) &&
!memcmp(exe + exe_len, deleted, deleted_len);
else
return false;
}
static const char * const uci_validate_name[__BLOBMSG_TYPE_LAST] = {
[BLOBMSG_TYPE_STRING] = "string",
[BLOBMSG_TYPE_ARRAY] = "list(string)",
[BLOBMSG_TYPE_INT32] = "uinteger",
[BLOBMSG_TYPE_BOOL] = "bool",
};
const char*
uci_get_validate_string(const struct uci_blob_param_list *p, int i)
{
if (p->validate[i])
return p->validate[i];
else if (uci_validate_name[p->params[i].type])
return uci_validate_name[p->params[i].type];
return p->validate[BLOBMSG_TYPE_STRING];
}
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