1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
/*
* net.hh - Miscellaneous networking routines
* util, the utility library for
* Project Horizon
*
* Copyright (c) 2019 Adélie Linux and contributors. All rights reserved.
* This code is licensed under the AGPL 3.0 license, as noted in the
* LICENSE-code file in the root directory of this repository.
*
* SPDX-License-Identifier: AGPL-3.0-only
*/
#ifndef __HORIZON_NET_HH_
#define __HORIZON_NET_HH_
#include <algorithm>
#include <arpa/inet.h> /* inet_pton */
#include <cstring> /* memcpy */
#include <string>
/*! Determine if a string starts with a valid, supported protocol
* @param url The URL.
* @returns true if +url+ is a URL for a supported protocol, false otherwise.
*/
static bool is_valid_url(const std::string &url) {
std::string::size_type colon = url.find("://");
/* If there's no ://, it's definitely not a URL */
if(colon == std::string::npos) return false;
std::string proto = url.substr(0, colon);
std::transform(proto.cbegin(), proto.cend(), proto.begin(), ::tolower);
if(proto == "http" || proto == "https" || proto == "tftp" || proto == "smb"
|| proto == "cifs") {
return true;
}
return false;
}
static int subnet_mask_to_cidr(const char *mask) {
char addr_buf[4];
uint32_t tmp;
int real_prefix = ::inet_pton(AF_INET, mask, &addr_buf);
/* helpfully, we need to init real_prefix to 1 anyway;
* if inet_pton doesn't return 1, we failed to convert */
if(real_prefix == 1) {
memcpy(&tmp, addr_buf, 4);
tmp = ntohl(tmp);
while((tmp <<= 1) & 0x80000000) {
real_prefix++;
}
}
return real_prefix;
}
#endif /* !__HORIZON_NET_HH */
|
