1 /*
2 * This file is part of the MicroPython project, http://micropython.org/
3 *
4 * The MIT License (MIT)
5 *
6 * Copyright (c) 2013, 2014 Damien P. George
7 * Copyright (c) 2015 Daniel Campora
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this software and associated documentation files (the "Software"), to deal
11 * in the Software without restriction, including without limitation the rights
12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 * copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 * THE SOFTWARE.
26 */
27
28 #include <stdint.h>
29 #include <stdio.h>
30 #include <string.h>
31
32 #include "py/runtime.h"
33 #include "shared/netutils/netutils.h"
34
35 // Takes an array with a raw IPv4 address and returns something like '192.168.0.1'.
netutils_format_ipv4_addr(uint8_t * ip,netutils_endian_t endian)36 mp_obj_t netutils_format_ipv4_addr(uint8_t *ip, netutils_endian_t endian) {
37 char ip_str[16];
38 mp_uint_t ip_len;
39 if (endian == NETUTILS_LITTLE) {
40 ip_len = snprintf(ip_str, 16, "%u.%u.%u.%u", ip[3], ip[2], ip[1], ip[0]);
41 } else {
42 ip_len = snprintf(ip_str, 16, "%u.%u.%u.%u", ip[0], ip[1], ip[2], ip[3]);
43 }
44 return mp_obj_new_str(ip_str, ip_len);
45 }
46
47 // Takes an array with a raw IP address, and a port, and returns a net-address
48 // tuple such as ('192.168.0.1', 8080).
netutils_format_inet_addr(uint8_t * ip,mp_uint_t port,netutils_endian_t endian)49 mp_obj_t netutils_format_inet_addr(uint8_t *ip, mp_uint_t port, netutils_endian_t endian) {
50 mp_obj_t tuple[2] = {
51 tuple[0] = netutils_format_ipv4_addr(ip, endian),
52 tuple[1] = mp_obj_new_int(port),
53 };
54 return mp_obj_new_tuple(2, tuple);
55 }
56
netutils_parse_ipv4_addr(mp_obj_t addr_in,uint8_t * out_ip,netutils_endian_t endian)57 void netutils_parse_ipv4_addr(mp_obj_t addr_in, uint8_t *out_ip, netutils_endian_t endian) {
58 size_t addr_len;
59 const char *addr_str = mp_obj_str_get_data(addr_in, &addr_len);
60 if (addr_len == 0) {
61 // special case of no address given
62 memset(out_ip, 0, NETUTILS_IPV4ADDR_BUFSIZE);
63 return;
64 }
65 const char *s = addr_str;
66 const char *s_top = addr_str + addr_len;
67 for (mp_uint_t i = 3; ; i--) {
68 mp_uint_t val = 0;
69 for (; s < s_top && *s != '.'; s++) {
70 val = val * 10 + *s - '0';
71 }
72 if (endian == NETUTILS_LITTLE) {
73 out_ip[i] = val;
74 } else {
75 out_ip[NETUTILS_IPV4ADDR_BUFSIZE - 1 - i] = val;
76 }
77 if (i == 0 && s == s_top) {
78 return;
79 } else if (i > 0 && s < s_top && *s == '.') {
80 s++;
81 } else {
82 mp_raise_ValueError(MP_ERROR_TEXT("invalid arguments"));
83 }
84 }
85 }
86
87 // Takes an address of the form ('192.168.0.1', 8080), returns the port and
88 // puts IP in out_ip (which must take at least IPADDR_BUF_SIZE bytes).
netutils_parse_inet_addr(mp_obj_t addr_in,uint8_t * out_ip,netutils_endian_t endian)89 mp_uint_t netutils_parse_inet_addr(mp_obj_t addr_in, uint8_t *out_ip, netutils_endian_t endian) {
90 mp_obj_t *addr_items;
91 mp_obj_get_array_fixed_n(addr_in, 2, &addr_items);
92 netutils_parse_ipv4_addr(addr_items[0], out_ip, endian);
93 return mp_obj_get_int(addr_items[1]);
94 }
95