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circuitpython/lib/netutils/netutils.c

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3.6 KiB

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
* Copyright (c) 2015 Daniel Campora
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "py/runtime.h"
#include "lib/netutils/netutils.h"
#include "supervisor/shared/translate.h"
// Takes an array with a raw IPv4 address and returns something like '192.168.0.1'.
mp_obj_t netutils_format_ipv4_addr(uint8_t *ip, netutils_endian_t endian) {
char ip_str[16];
mp_uint_t ip_len;
if (endian == NETUTILS_LITTLE) {
ip_len = snprintf(ip_str, 16, "%u.%u.%u.%u", ip[3], ip[2], ip[1], ip[0]);
} else {
ip_len = snprintf(ip_str, 16, "%u.%u.%u.%u", ip[0], ip[1], ip[2], ip[3]);
}
return mp_obj_new_str(ip_str, ip_len);
}
// Takes an array with a raw IP address, and a port, and returns a net-address
// tuple such as ('192.168.0.1', 8080).
mp_obj_t netutils_format_inet_addr(uint8_t *ip, mp_uint_t port, netutils_endian_t endian) {
mp_obj_t tuple[2] = {
tuple[0] = netutils_format_ipv4_addr(ip, endian),
tuple[1] = mp_obj_new_int(port),
};
return mp_obj_new_tuple(2, tuple);
}
void netutils_parse_ipv4_addr(mp_obj_t addr_in, uint8_t *out_ip, netutils_endian_t endian) {
size_t addr_len;
const char *addr_str = mp_obj_str_get_data(addr_in, &addr_len);
if (addr_len == 0) {
// special case of no address given
memset(out_ip, 0, NETUTILS_IPV4ADDR_BUFSIZE);
return;
}
const char *s = addr_str;
const char *s_top = addr_str + addr_len;
for (mp_uint_t i = 3 ; ; i--) {
mp_uint_t val = 0;
for (; s < s_top && *s != '.'; s++) {
val = val * 10 + *s - '0';
}
if (endian == NETUTILS_LITTLE) {
out_ip[i] = val;
} else {
out_ip[NETUTILS_IPV4ADDR_BUFSIZE - 1 - i] = val;
}
if (i == 0 && s == s_top) {
return;
} else if (i > 0 && s < s_top && *s == '.') {
s++;
} else {
mp_raise_ValueError(translate("invalid arguments"));
}
}
}
// Takes an address of the form ('192.168.0.1', 8080), returns the port and
// puts IP in out_ip (which must take at least IPADDR_BUF_SIZE bytes).
mp_uint_t netutils_parse_inet_addr(mp_obj_t addr_in, uint8_t *out_ip, netutils_endian_t endian) {
mp_obj_t *addr_items;
mp_obj_get_array_fixed_n(addr_in, 2, &addr_items);
netutils_parse_ipv4_addr(addr_items[0], out_ip, endian);
return mp_obj_get_int(addr_items[1]);
}