| | 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 | |
| | 18 | #include "net.h" |
| | 19 | #include "blink.h" |
| | 20 | #include "config.h" |
| | 21 | |
| | 22 | #include "pico/cyw43_arch.h" |
| | 23 | #include "pico/rand.h" |
| | 24 | |
| | 25 | #include "lwip/pbuf.h" |
| | 26 | #include "lwip/udp.h" |
| | 27 | |
| | 28 | /* We only ever send to one address, and we only ever have one thread, so just |
| | 29 | * use one udp_pcb */ |
| | 30 | static struct udp_pcb *the_pcb = NULL; |
| | 31 | static uint32_t epoch = 0; |
| | 32 | |
| | 33 | static void net_local_init() { |
| | 34 | if (the_pcb) |
| | 35 | return; |
| | 36 | |
| | 37 | new_epoch(); |
| | 38 | |
| | 39 | the_pcb = udp_new(); |
| | 40 | if (!the_pcb) |
| | 41 | signal_error_by_blinking(); |
| | 42 | |
| | 43 | ip_addr_t ipaddr; |
| | 44 | if (ip4addr_aton(config_tattle_server_ip_address, &ipaddr) == 0) |
| | 45 | signal_error_by_blinking(); |
| | 46 | |
| | 47 | if (udp_connect(the_pcb, &ipaddr, config_tattle_port) != ERR_OK) |
| | 48 | signal_error_by_blinking(); |
| | 49 | } |
| | 50 | |
| | 51 | void new_epoch() { epoch = get_rand_32(); } |
| | 52 | |
| | 53 | struct tattle_message_wire_format { |
| | 54 | u32_t epoch; |
| | 55 | u16_t sender; |
| | 56 | u16_t seq; |
| | 57 | u32_t ago; |
| | 58 | }; |
| | 59 | |
| | 60 | void send_report_packet(u16_t seq, u32_t ago) { |
| | 61 | cyw43_arch_lwip_begin(); |
| | 62 | |
| | 63 | net_local_init(); |
| | 64 | |
| | 65 | struct pbuf *p = pbuf_alloc( |
| | 66 | PBUF_TRANSPORT, sizeof(struct tattle_message_wire_format), PBUF_RAM); |
| | 67 | if (!p) |
| | 68 | signal_error_by_blinking(); |
| | 69 | |
| | 70 | struct tattle_message_wire_format *msg = |
| | 71 | (struct tattle_message_wire_format *)(p->payload); |
| | 72 | msg->epoch = htonl(epoch); |
| | 73 | msg->sender = htons(config_this_tattler_identity); |
| | 74 | msg->seq = htons(seq); |
| | 75 | msg->ago = htonl(ago); |
| | 76 | |
| | 77 | if (udp_send(the_pcb, p) != ERR_OK) |
| | 78 | signal_error_by_blinking(); |
| | 79 | |
| | 80 | pbuf_free(p); |
| | 81 | |
| | 82 | cyw43_arch_lwip_end(); |
| | 83 | } |
projects / tattlekey / blame_incremental