mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-23 14:58:09 +00:00
68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
#include <arpa/inet.h>
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#include <sys/socket.h>
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#include <fcntl.h>
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#include <assert.h>
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#include <stdlib.h>
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#define TREZOR_UDP_PORT 21324
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static int s;
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static struct sockaddr_in si_me, si_other;
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static socklen_t slen = 0;
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void msg_init(void)
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{
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s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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assert(s != -1);
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fcntl(s, F_SETFL, O_NONBLOCK);
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si_me.sin_family = AF_INET;
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const char *ip = getenv("TREZOR_UDP_IP");
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if (ip) {
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si_me.sin_addr.s_addr = inet_addr(ip);
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} else {
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si_me.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
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}
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const char *port = getenv("TREZOR_UDP_PORT");
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if (port) {
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si_me.sin_port = htons(atoi(port));
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} else {
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si_me.sin_port = htons(TREZOR_UDP_PORT);
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}
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int b;
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b = bind(s, (struct sockaddr*)&si_me, sizeof(si_me));
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assert(b != -1);
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}
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ssize_t msg_recv(uint8_t *iface, uint8_t *buf, size_t len)
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{
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struct sockaddr_in si;
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socklen_t sl = sizeof(si);
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memset(buf, 0, len);
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iface = 0; // UDP uses always interface 0
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ssize_t r = recvfrom(s, buf, len, MSG_DONTWAIT, (struct sockaddr *)&si, &sl);
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if (r < 0) {
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return r;
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}
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si_other = si;
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slen = sl;
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return r;
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}
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ssize_t msg_send(uint8_t iface, const uint8_t *buf, size_t len)
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{
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(void)iface; // ignore interface for UDP
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ssize_t r = -1;
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if (slen) {
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r = sendto(s, buf, len, MSG_DONTWAIT, (const struct sockaddr *)&si_other, slen);
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}
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return r;
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}
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// from modtrezorui:
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uint32_t trezorui_poll_sdl_event(void);
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#define msg_poll_ui_event trezorui_poll_sdl_event
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