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| 1 | +/* |
| 2 | + * This file is part of the Micro Python 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/obj.h" |
| 33 | +#include "py/nlr.h" |
| 34 | +#include "netutils.h" |
| 35 | + |
| 36 | +// Takes an array with a raw IPv4 address and returns something like '192.168.0.1'. |
| 37 | +mp_obj_t netutils_format_ipv4_addr(uint8_t *ip, netutils_endian_t endian) { |
| 38 | + char ip_str[16]; |
| 39 | + mp_uint_t ip_len; |
| 40 | + if (endian == NETUTILS_LITTLE) { |
| 41 | + ip_len = snprintf(ip_str, 16, "%u.%u.%u.%u", ip[3], ip[2], ip[1], ip[0]); |
| 42 | + } else { |
| 43 | + ip_len = snprintf(ip_str, 16, "%u.%u.%u.%u", ip[0], ip[1], ip[2], ip[3]); |
| 44 | + } |
| 45 | + return mp_obj_new_str(ip_str, ip_len, false); |
| 46 | +} |
| 47 | + |
| 48 | +// Takes an array with a raw IP address, and a port, and returns a net-address |
| 49 | +// tuple such as ('192.168.0.1', 8080). |
| 50 | +mp_obj_t netutils_format_inet_addr(uint8_t *ip, mp_uint_t port, netutils_endian_t endian) { |
| 51 | + mp_obj_t tuple[2] = { |
| 52 | + tuple[0] = netutils_format_ipv4_addr(ip, endian), |
| 53 | + tuple[1] = mp_obj_new_int(port), |
| 54 | + }; |
| 55 | + return mp_obj_new_tuple(2, tuple); |
| 56 | +} |
| 57 | + |
| 58 | +void netutils_parse_ipv4_addr(mp_obj_t addr_in, uint8_t *out_ip, netutils_endian_t endian) { |
| 59 | + mp_uint_t addr_len; |
| 60 | + const char *addr_str = mp_obj_str_get_data(addr_in, &addr_len); |
| 61 | + if (addr_len == 0) { |
| 62 | + // special case of no address given |
| 63 | + memset(out_ip, 0, NETUTILS_IPV4ADDR_BUFSIZE); |
| 64 | + return; |
| 65 | + } |
| 66 | + const char *s = addr_str; |
| 67 | + const char *s_top = addr_str + addr_len; |
| 68 | + for (mp_uint_t i = 3 ; ; i--) { |
| 69 | + mp_uint_t val = 0; |
| 70 | + for (; s < s_top && *s != '.'; s++) { |
| 71 | + val = val * 10 + *s - '0'; |
| 72 | + } |
| 73 | + if (endian == NETUTILS_LITTLE) { |
| 74 | + out_ip[i] = val; |
| 75 | + } else { |
| 76 | + out_ip[NETUTILS_IPV4ADDR_BUFSIZE - 1 - i] = val; |
| 77 | + } |
| 78 | + if (i == 0 && s == s_top) { |
| 79 | + return; |
| 80 | + } else if (i > 0 && s < s_top && *s == '.') { |
| 81 | + s++; |
| 82 | + } else { |
| 83 | + nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "invalid arguments")); |
| 84 | + } |
| 85 | + } |
| 86 | +} |
| 87 | + |
| 88 | +// Takes an address of the form ('192.168.0.1', 8080), returns the port and |
| 89 | +// puts IP in out_ip (which must take at least IPADDR_BUF_SIZE bytes). |
| 90 | +mp_uint_t netutils_parse_inet_addr(mp_obj_t addr_in, uint8_t *out_ip, netutils_endian_t endian) { |
| 91 | + mp_obj_t *addr_items; |
| 92 | + mp_obj_get_array_fixed_n(addr_in, 2, &addr_items); |
| 93 | + netutils_parse_ipv4_addr(addr_items[0], out_ip, endian); |
| 94 | + return mp_obj_get_int(addr_items[1]); |
| 95 | +} |
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