projects / tattlekey / blame
| Commit | Line | Data |
|---|---|---|
| a4a617fd SW |
1 | /* tattlekey: A one-key UDP keyboard |
| 2 | * Copyright (C) 2023 Scott Worley <scottworley@scottworley.com> | |
| 3 | * | |
| 4 | * This program is free software: you can redistribute it and/or modify | |
| 5 | * it under the terms of the GNU General Public License as published by | |
| 6 | * the Free Software Foundation, either version 3 of the License, or | |
| 7 | * (at your option) any later version. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it will be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | * GNU General Public License for more details. | |
| 13 | * | |
| 14 | * You should have received a copy of the GNU General Public License | |
| 15 | * along with this program. If not, see <https://www.gnu.org/licenses/>. | |
| 16 | */ | |
| 17 | ||
| 1e0a316e SW |
18 | #include "net.h" |
| 19 | #include "blink.h" | |
| 20 | #include "config.h" | |
| 21 | ||
| 22 | #include "pico/cyw43_arch.h" | |
| 23 | ||
| 24 | #include "lwip/pbuf.h" | |
| 25 | #include "lwip/udp.h" | |
| 26 | ||
| 27 | /* We only ever send to one address, and we only ever have one thread, so just | |
| 28 | * use one udp_pcb */ | |
| 29 | static struct udp_pcb *the_pcb = NULL; | |
| 30 | ||
| 31 | static void initialize_the_pcb() { | |
| 32 | if (the_pcb) | |
| 33 | return; | |
| 34 | ||
| 35 | the_pcb = udp_new(); | |
| 36 | if (!the_pcb) | |
| 37 | signal_error_by_blinking(); | |
| 38 | ||
| 39 | ip_addr_t ipaddr; | |
| d7789e5b | 40 | if (ip4addr_aton(config_tattle_server_ip_address, &ipaddr) == 0) |
| 1e0a316e SW |
41 | signal_error_by_blinking(); |
| 42 | ||
| d7789e5b | 43 | if (udp_connect(the_pcb, &ipaddr, config_tattle_port) != ERR_OK) |
| 1e0a316e SW |
44 | signal_error_by_blinking(); |
| 45 | } | |
| 46 | ||
| 47 | struct tattle_message_wire_format { | |
| 48 | u16_t sender; | |
| 49 | u16_t seq; | |
| 9266b741 | 50 | u32_t ago; |
| 1e0a316e SW |
51 | }; |
| 52 | ||
| 9266b741 | 53 | void send_report_packet(u16_t seq, u32_t ago) { |
| 1e0a316e SW |
54 | cyw43_arch_lwip_begin(); |
| 55 | ||
| 56 | initialize_the_pcb(); | |
| 57 | ||
| 58 | struct pbuf *p = pbuf_alloc( | |
| 59 | PBUF_TRANSPORT, sizeof(struct tattle_message_wire_format), PBUF_RAM); | |
| 60 | if (!p) | |
| 61 | signal_error_by_blinking(); | |
| 62 | ||
| 63 | struct tattle_message_wire_format *msg = | |
| 64 | (struct tattle_message_wire_format *)(p->payload); | |
| d7789e5b | 65 | msg->sender = htons(config_this_tattler_identity); |
| 1e0a316e | 66 | msg->seq = htons(seq); |
| 9266b741 | 67 | msg->ago = htonl(ago); |
| 1e0a316e SW |
68 | |
| 69 | if (udp_send(the_pcb, p) != ERR_OK) | |
| 70 | signal_error_by_blinking(); | |
| 71 | ||
| 72 | pbuf_free(p); | |
| 73 | ||
| 74 | cyw43_arch_lwip_end(); | |
| 75 | } |