mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
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Totoo
98 lines
3.0 KiB
C++
98 lines
3.0 KiB
C++
/*
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* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2017 Furrtek
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include <cstdint>
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#include "aprs.hpp"
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#include "ax25.hpp"
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#include "portapack_persistent_memory.hpp"
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using namespace ax25;
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namespace aprs {
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void make_aprs_frame(const char* src_address, const uint32_t src_ssid, const char* dest_address, const uint32_t dest_ssid, const std::string& payload, const std::string& path) {
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AX25Frame frame;
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char address[14] = {0};
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memset(address, ' ', 14);
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size_t dest_len = strlen(dest_address);
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if (dest_len > 6) dest_len = 6;
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memcpy(&address[0], dest_address, dest_len);
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size_t src_len = strlen(src_address);
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if (src_len > 6) src_len = 6;
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memcpy(&address[7], src_address, src_len);
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// euquiq: According to ax.25 doc section 2.2.13.x.x and 2.4.1.2
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// SSID need bits 5.6 set, so later when shifted it will end up being 011xxxx0 (xxxx = SSID number)
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// Notice that if need to signal usage of AX.25 V2.0, (dest_ssid | 112); (MSb will need to be set at the end)
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address[6] = (dest_ssid | 0x30);
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address[13] = (src_ssid | 0x30);
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// fix path ssid bits. the result will be the same as above
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std::string fixed_path = "";
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const char* p = path.c_str();
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while (*p) {
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while (*p == ' ') p++;
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if (!*p) break;
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char call[6] = {' ', ' ', ' ', ' ', ' ', ' '};
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int idx = 0;
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while (*p && *p != '-' && *p != ',') {
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if (*p != ' ') {
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if (idx < 6) {
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char c = *p;
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if (c >= 'a' && c <= 'z') c -= 32;
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call[idx++] = c;
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}
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}
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p++;
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}
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int ssid = 0;
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if (*p == '-') {
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p++;
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while (*p == ' ') p++;
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while (*p >= '0' && *p <= '9') {
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ssid = ssid * 10 + (*p - '0');
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p++;
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}
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}
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if (ssid >= 0 && ssid <= 15) {
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for (int i = 0; i < 6; i++) fixed_path += call[i];
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fixed_path += (char)(ssid | 0x30);
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}
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while (*p && *p != ',') p++;
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if (*p == ',') p++;
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}
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frame.make_ui_frame(address, 0x03, protocol_id_t::NO_LAYER3, payload, fixed_path);
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}
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} /* namespace aprs */
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