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#include <inttypes.h>
#include <sys/timerfd.h>
#include <sys/socket.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <string.h>
#include "main.h"
#include "uring.h"
#include "config.h"
#include "announce.h"
#include "server.h"
struct announce {
uint64_t value;
struct uring_task task;
struct uring_task mcast_task;
};
static void
mcast_free(struct uring_task *task)
{
struct announce *aev = container_of(task, struct announce, mcast_task);
debug(DBG_ANN, "task %p, aev %p\n", task, aev);
}
static void
mcast_sent(struct cfg *cfg, struct uring_task *task, int res)
{
if (res < 0)
error("failure %i\n", res);
else
debug(DBG_ANN, "result %i\n", res);
}
static void
mcast_send(struct cfg *cfg, struct announce *aev, struct server *server)
{
int len;
if (!server || !server->pretty_name || server->announce_port < 1)
return;
len = snprintf(server->mcast_buf.buf, sizeof(server->mcast_buf.buf),
"[MOTD]%s[/MOTD][AD]%" PRIu16 "[/AD]",
server->pretty_name, server->announce_port);
if (len < 1 || len >= sizeof(server->mcast_buf.buf)) {
error("snprintf returned %i\n", len);
return;
}
server->mcast_buf.len = len;
uring_task_set_buf(&aev->mcast_task, &server->mcast_buf);
uring_tbuf_sendmsg(cfg, &aev->mcast_task, mcast_sent);
}
static void
mcast_send_all(struct cfg *cfg, struct announce *aev)
{
struct server *server;
list_for_each_entry(server, &cfg->servers, list) {
verbose("Announcing server: %s\n", server->name);
mcast_send(cfg, aev, server);
}
}
static void
announce_cb(struct cfg *cfg, struct uring_task *task, int res)
{
struct announce *aev = container_of(task, struct announce, task);
debug(DBG_ANN, "res %i\n", res);
if (task->dead) {
debug(DBG_ANN, "task is dead\n");
return;
}
if (res != sizeof(aev->value))
perrordie("timerfd_read");
debug(DBG_ANN, "timerfd value %" PRIu64 "\n", aev->value);
mcast_send_all(cfg, aev);
uring_read(cfg, &aev->task, &aev->value, sizeof(aev->value), announce_cb);
}
static void
announce_free(struct uring_task *task)
{
struct announce *aev = container_of(task, struct announce, task);
debug(DBG_ANN, "task %p, aev 0x%p\n", task, aev);
xfree(aev);
}
void
announce_refdump(struct announce *aev)
{
if (!aev)
return;
uring_task_refdump(&aev->task);
uring_task_refdump(&aev->mcast_task);
}
void
announce_delete(struct cfg *cfg)
{
if (!cfg->aev) {
error("missing parameters\n");
return;
}
debug(DBG_ANN, "closing fd %i\n", cfg->aev->task.fd);
uring_task_destroy(cfg, &cfg->aev->mcast_task);
uring_task_destroy(cfg, &cfg->aev->task);
cfg->aev = NULL;
}
void
announce_stop(struct announce *aev)
{
struct itimerspec tspec = {
.it_interval = {
.tv_sec = 0,
.tv_nsec = 0
},
.it_value = {
.tv_sec = 0,
.tv_nsec = 0
}
};
if (timerfd_settime(aev->task.fd, 0, &tspec, NULL) != 0)
perrordie("timerfd_settime");
}
void
announce_start(struct announce *aev)
{
struct itimerspec tspec = {
.it_interval = {
.tv_sec = 3,
.tv_nsec = 0
},
.it_value = {
.tv_sec = 3,
.tv_nsec = 0
}
};
if (timerfd_settime(aev->task.fd, 0, &tspec, NULL) != 0)
perrordie("timerfd_settime");
}
void
announce_init(struct cfg *cfg)
{
struct announce *aev;
int afd;
int sfd;
aev = zmalloc(sizeof(*aev));
if (!aev)
perrordie("malloc");
afd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC);
if (afd < 0)
perrordie("timerfd_create");
sfd = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
if (sfd < 0)
perrordie("socket");
uring_task_init(&aev->task, "aev", uring_parent(cfg), announce_free);
uring_task_set_fd(&aev->task, afd);
uring_task_init(&aev->mcast_task, "aev_mcast", &aev->task, mcast_free);
uring_task_set_fd(&aev->mcast_task, sfd);
aev->mcast_task.addr.in4.sin_family = AF_INET;
aev->mcast_task.addr.in4.sin_addr.s_addr = inet_addr("224.0.2.60");
aev->mcast_task.addr.in4.sin_port = htons(4445);
aev->mcast_task.addr.addrlen = sizeof(aev->mcast_task.addr.in4);
cfg->aev = aev;
uring_read(cfg, &aev->task, &aev->value, sizeof(aev->value), announce_cb);
}
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