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#include "htbt-worker.h"
#include "protocol.h"
#include "proone.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>
#include <sys/mman.h>
#include <sys/stat.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;
};
#if 0
static int create_ny_bin_shm (prne_rnd_engine_t *rnd) {
static const size_t str_len = sizeof(prne_s_g->ny_bin_shm_name);
prne_s_g->ny_bin_shm_name[0] = '/';
prne_s_g->ny_bin_shm_name[str_len - 1] = 0;
prne_rnd_anum_str(rnd, prne_s_g->ny_bin_shm_name + 1, str_len - 2);
return shm_open(prne_s_g->ny_bin_shm_name, O_RDWR | O_CREAT | O_TRUNC, 0700);
}
static void exec_ny_bin (void) {
// Just die on error
static const size_t proc_fd_path_size = 14 + 11 + 1;
int fd;
uint8_t *data;
size_t i;
const char **args;
struct stat st;
char *proc_fd_path, *real_shm_path;
prne_htbt_cmd_t cmd;
prne_htbt_init_cmd(&cmd);
fd = shm_open(prne_s_g->ny_bin_shm_name, O_RDONLY, 0);
if (fd < 0) {
abort();
}
if (fstat(fd, &st) < 0 || st.st_size <= 0 || (size_t)st.st_size < prne_s_g->ny_bin_size) {
abort();
}
data = (uint8_t*)mmap(NULL, (size_t)st.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (prne_htbt_deserialise_cmd(data + prne_s_g->ny_bin_size, (size_t)st.st_size - prne_s_g->ny_bin_size, NULL, &cmd) != PRNE_HTBT_DESER_RET_OK) {
abort();
}
munmap(data, (size_t)st.st_size);
data = NULL;
ftruncate(fd, prne_s_g->ny_bin_size);
args = prne_malloc(sizeof(const char*), (size_t)cmd.argc + 2);
for(i = 1; i <= cmd.argc; i += 1) {
args[i] = cmd.mem + cmd.offset_arr[i];
}
args[i] = NULL;
proc_fd_path = prne_malloc(1, proc_fd_path_size);
snprintf(proc_fd_path, proc_fd_path_size, "/proc/self/fd/%d", fd);
if (lstat(proc_fd_path, &st) < 0) {
abort();
}
real_shm_path = prne_malloc(1, st.st_size + 1);
if (readlink(proc_fd_path, real_shm_path, st.st_size) != st.st_size) {
abort();
}
prne_free(proc_fd_path);
proc_fd_path = NULL;
args[0] = real_shm_path;
fchmod(fd, 0777);
prne_close(fd);
fd = -1;
if (execv(real_shm_path, (char *const*)args) < 0) {
abort();
}
}
#endif
static void heartbeat_worker_free (void *in_ctx) {
DECL_CTX_PTR(in_ctx);
prne_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_htbt_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(PRNE_HTBT_PROTO_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(PRNE_HTBT_PROTO_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) {
prne_close(ctx->fd);
}
prne_free(ctx);
}
return ret;
}
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