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 parse-bytecode

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/*

* This file is part of the Micro Python 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/obj.h"

#include "py/nlr.h"

#include "netutils.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, false);

}

// 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) {

mp_uint_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 {

nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "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]);

}