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#include "heartbeat-worker.h"
#include "util_rt.h"
#include "dvault.h"
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#define DECL_CTX_PTR(p) hb_w_ctx_t *ctx = (hb_w_ctx_t*)p;
typedef struct hb_w_ctx hb_w_ctx_t;
struct hb_w_ctx {
int fd;
int domain;
uint8_t rcv_buf[256];
bool finalised;
};
static const uint16_t HEARTBEAT_DEFAULT_BIND_PORT = 55420;
static void heartbeat_worker_free (void *in_ctx) {
DECL_CTX_PTR(in_ctx);
close(ctx->fd);
prne_free(ctx);
}
static void heartbeat_worker_fin (void *in_ctx) {
DECL_CTX_PTR(in_ctx);
ctx->finalised = true;
}
static void heartbeat_worker_work (void *in_ctx, const prne_worker_sched_info_t *sched_info, prne_worker_sched_req_t *sched_req) {
DECL_CTX_PTR(in_ctx);
if (sched_req->pollfd_ready) {
const short revents = sched_req->pollfd_arr[0].revents;
if (revents & (POLLERR | POLLHUP | POLLNVAL)) {
ctx->finalised = true;
sched_req->flags = PRNE_WORKER_SCHED_FLAG_NONE;
return;
}
if (revents & POLLIN) {
socklen_t addr_len;
// TODO
if (ctx->domain == AF_INET) {
struct sockaddr_in remote_addr;
addr_len = sizeof(struct sockaddr_in);
if (recvfrom(ctx->fd, ctx->rcv_buf, sizeof(ctx->rcv_buf), 0, (struct sockaddr*)&remote_addr, &addr_len) == sizeof(ctx->rcv_buf)) {
prne_dvault_invert_mem(sizeof(ctx->rcv_buf) - 1, ctx->rcv_buf + 1, ctx->rcv_buf[0]);
sendto(ctx->fd, ctx->rcv_buf + 1, sizeof(ctx->rcv_buf) - 1, 0, (const struct sockaddr*)&remote_addr, addr_len);
}
}
else {
struct sockaddr_in6 remote_addr;
addr_len = sizeof(struct sockaddr_in6);
if (recvfrom(ctx->fd, ctx->rcv_buf, sizeof(ctx->rcv_buf), 0, (struct sockaddr*)&remote_addr, &addr_len) == sizeof(ctx->rcv_buf)) {
prne_dvault_invert_mem(sizeof(ctx->rcv_buf) - 1, ctx->rcv_buf + 1, ctx->rcv_buf[0]);
sendto(ctx->fd, ctx->rcv_buf + 1, sizeof(ctx->rcv_buf) - 1, 0, (const struct sockaddr*)&remote_addr, addr_len);
}
}
}
}
sched_req->flags = PRNE_WORKER_SCHED_FLAG_POLL;
sched_req->mem_func.alloc(sched_req, 1);
sched_req->pollfd_arr[0].fd = ctx->fd;
sched_req->pollfd_arr[0].events = POLLIN;
}
static bool heartbeat_worker_has_finalised (void *in_ctx) {
DECL_CTX_PTR(in_ctx);
return ctx->finalised;
}
bool prne_alloc_heartbeat_worker (prne_worker_t *w) {
bool ret = true;
hb_w_ctx_t *ctx = NULL;
ctx = (hb_w_ctx_t*)prne_malloc(sizeof(hb_w_ctx_t), 1);
if (ctx == NULL) {
ret = false;
goto END;
}
ctx->fd = -1;
ctx->domain = 0;
ctx->finalised = false;
ctx->fd = socket(AF_INET6, SOCK_DGRAM, 0);
if (ctx->fd < 0) {
ctx->fd = socket(AF_INET, SOCK_DGRAM, 0);
if (ctx->fd < 0) {
ret = false;
goto END;
}
ctx->domain = AF_INET;
}
else {
ctx->domain = AF_INET6;
}
if (fcntl(ctx->fd, F_SETFL, O_NONBLOCK) < 0) {
ret = false;
goto END;
}
if (ctx->domain == AF_INET) {
struct sockaddr_in local_addr;
memset(&local_addr, 0, sizeof(struct sockaddr_in));
local_addr.sin_family = AF_INET;
local_addr.sin_port = htons(HEARTBEAT_DEFAULT_BIND_PORT);
local_addr.sin_addr.s_addr = INADDR_ANY;
if (bind(ctx->fd, (const struct sockaddr*)&local_addr, sizeof(struct sockaddr_in)) < 0) {
ret = false;
goto END;
}
}
else {
struct sockaddr_in6 local_addr;
memset(&local_addr, 0, sizeof(struct sockaddr_in6));
local_addr.sin6_family = AF_INET6;
local_addr.sin6_port = htons(HEARTBEAT_DEFAULT_BIND_PORT);
if (bind(ctx->fd, (const struct sockaddr*)&local_addr, sizeof(struct sockaddr_in6)) < 0) {
ret = false;
goto END;
}
}
w->ctx = ctx;
w->free = heartbeat_worker_free;
w->fin = heartbeat_worker_fin;
w->work = heartbeat_worker_work;
w->has_finalised = heartbeat_worker_has_finalised;
END:
if (!ret) {
if (ctx != NULL) {
close(ctx->fd);
}
prne_free(ctx);
}
return ret;
}
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