projects / tattlekey / blame
| Commit | Line | Data |
|---|---|---|
| 1e0a316e SW |
1 | #include "net.h" |
| 2 | #include "blink.h" | |
| 3 | #include "config.h" | |
| 4 | ||
| 5 | #include "pico/cyw43_arch.h" | |
| 6 | ||
| 7 | #include "lwip/pbuf.h" | |
| 8 | #include "lwip/udp.h" | |
| 9 | ||
| 10 | /* We only ever send to one address, and we only ever have one thread, so just | |
| 11 | * use one udp_pcb */ | |
| 12 | static struct udp_pcb *the_pcb = NULL; | |
| 13 | ||
| 14 | static void initialize_the_pcb() { | |
| 15 | if (the_pcb) | |
| 16 | return; | |
| 17 | ||
| 18 | the_pcb = udp_new(); | |
| 19 | if (!the_pcb) | |
| 20 | signal_error_by_blinking(); | |
| 21 | ||
| 22 | ip_addr_t ipaddr; | |
| 23 | if (ip4addr_aton(tattle_server_ip_address, &ipaddr) == 0) | |
| 24 | signal_error_by_blinking(); | |
| 25 | ||
| 26 | if (udp_connect(the_pcb, &ipaddr, htons(tattle_port)) != ERR_OK) | |
| 27 | signal_error_by_blinking(); | |
| 28 | } | |
| 29 | ||
| 30 | struct tattle_message_wire_format { | |
| 31 | u16_t sender; | |
| 32 | u16_t seq; | |
| 33 | u16_t ago; | |
| 34 | }; | |
| 35 | ||
| 36 | void send_report(u16_t seq, u16_t ago) { | |
| 37 | cyw43_arch_lwip_begin(); | |
| 38 | ||
| 39 | initialize_the_pcb(); | |
| 40 | ||
| 41 | struct pbuf *p = pbuf_alloc( | |
| 42 | PBUF_TRANSPORT, sizeof(struct tattle_message_wire_format), PBUF_RAM); | |
| 43 | if (!p) | |
| 44 | signal_error_by_blinking(); | |
| 45 | ||
| 46 | struct tattle_message_wire_format *msg = | |
| 47 | (struct tattle_message_wire_format *)(p->payload); | |
| 48 | msg->sender = htons(this_tattler_identity); | |
| 49 | msg->seq = htons(seq); | |
| 50 | msg->ago = htons(ago); | |
| 51 | ||
| 52 | if (udp_send(the_pcb, p) != ERR_OK) | |
| 53 | signal_error_by_blinking(); | |
| 54 | ||
| 55 | pbuf_free(p); | |
| 56 | ||
| 57 | cyw43_arch_lwip_end(); | |
| 58 | } |