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#include <arpa/inet.h>
#include <json-c/json.h>
#include <signal.h>
#include <sqlite3.h>
#include <string.h>
#include <threads.h>
#include "logger.c"
#include "sql.c"
#define BACKLOG 10
struct Socket {
int fd;
struct sockaddr_in addr;
};
struct json_object *g_response_header;
// ----------------------------------------------------------------------------
// SQL callbacks
// ----------------------------------------------------------------------------
void sql_callback_add_column_name(sqlite3_stmt *sql_stmt, void *data) {
assert(sql_stmt);
assert(data);
assert(sqlite3_column_type(sql_stmt, 0) == SQLITE_TEXT);
assert(!strcmp(sqlite3_column_name(sql_stmt, 0), "name"));
const char *col_name = (const char *)sqlite3_column_text(sql_stmt, 0);
struct json_object *response = (struct json_object *)data;
if (!json_object_object_get_ex(response, col_name, NULL)) {
json_object_object_add(response, col_name, json_object_new_array());
}
}
void sql_callback_add_data(sqlite3_stmt *sql_stmt, void *data) {
assert(sql_stmt);
assert(data);
struct json_object *response = (struct json_object *)data;
for (int i = 0; i < sqlite3_column_count(sql_stmt); i++) {
const char *col_name = sqlite3_column_name(sql_stmt, i);
struct json_object *col_data = json_object_object_get(response, col_name);
if (col_data) {
if (sqlite3_column_type(sql_stmt, i) == SQLITE_BLOB) {
// TODO: render blobs in parallel
} else {
json_object_array_add(col_data, json_object_new_int64(sqlite3_column_int64(sql_stmt, i)));
}
}
}
}
// ----------------------------------------------------------------------------
// Main functions
// ----------------------------------------------------------------------------
void sig_handler(int signo) {
(void)signo;
log_warn("Signal received, will stop SALIS data server");
json_object_put(g_response_header);
sql_close();
exit(0);
}
void respond_name(int socket_fd) {
log_info("Client requested simulation name");
struct json_object *sim_name = json_object_new_object();
json_object_object_add(sim_name, "name", json_object_new_string(NAME));
json_object_to_fd(socket_fd, sim_name, 0);
json_object_put(sim_name);
}
void respond_opts(int socket_fd) {
log_info("Client requested simulation options");
struct json_object *sim_opts = json_object_from_file(SIM_OPTS);
json_object_to_fd(socket_fd, sim_opts, 0);
json_object_put(sim_opts);
}
void respond_hash(int socket_fd) {
log_info("Client requested git hash");
char buff[41] = { 0 };
FILE *pipe = popen("git rev-parse HEAD", "r");
fread(buff, sizeof(char), 40, pipe);
pclose(pipe);
struct json_object *git_hash = json_object_new_object();
json_object_object_add(git_hash, "hash", json_object_new_string(buff));
json_object_to_fd(socket_fd, git_hash, 0);
json_object_put(git_hash);
}
void respond_data(int socket_fd, struct json_object *request) {
assert(request);
const char *request_str = json_object_to_json_string(request);
log_info("Client requested simulation data with the following parameters: %s", request_str);
const char *x_axis = json_object_get_string(json_object_object_get(request, "x-axis"));
int64_t x_current = json_object_get_int64(json_object_object_get(request, "x-current"));
int64_t x_high = json_object_get_int64(json_object_object_get(request, "x-high"));
int64_t nth = json_object_get_int64(json_object_object_get(request, "nth"));
int64_t entries = json_object_get_int64(json_object_object_get(request, "entries"));
const char *x_axis_pref = (!strcmp(x_axis, "rowid") || !strcmp(x_axis, "step")) ? "core." : "";
struct json_object *response = NULL;
json_object_deep_copy(g_response_header, &response, NULL);
sql_exec(
0, NULL, NULL,
sql_callback_add_data,
response,
"select * from ("
"select core.rowid, core.step, * from core inner join arch "
"where core.rowid = arch.rowid and %s%s > %ld and %s%s <= %ld and core.rowid %% %ld == 0 "
"order by %s%s desc limit %ld"
") order by %s asc;",
x_axis_pref,
x_axis,
x_current,
x_axis_pref,
x_axis,
x_high,
nth,
x_axis_pref,
x_axis,
entries,
x_axis
);
const char *response_str = json_object_to_json_string(response);
log_info("Responding to client with: %s", response_str);
json_object_to_fd(socket_fd, response, 0);
json_object_put(response);
shutdown(socket_fd, SHUT_WR);
}
int handle_client(struct Socket *socket) {
assert(socket);
char socket_ip[INET_ADDRSTRLEN];
inet_ntop(AF_INET, &socket->addr.sin_addr, socket_ip, INET_ADDRSTRLEN);
log_info("Client connected: %s:%d", socket_ip, ntohs(socket->addr.sin_port));
struct json_object *request_json = json_object_from_fd(socket->fd);
struct json_object *request_str = NULL;
if (!json_object_object_get_ex(request_json, "request", &request_str)) assert(false);
const char *request = json_object_get_string(request_str);
assert(request);
if (!strcmp(request, "name")) {
respond_name(socket->fd);
} else if (!strcmp(request, "opts")) {
respond_opts(socket->fd);
} else if (!strcmp(request, "hash")) {
respond_hash(socket->fd);
} else if (!strcmp(request, "data")) {
respond_data(socket->fd, request_json);
} else {
assert(false);
}
json_object_put(request_json);
log_info("Client disconnected: %s:%d", socket_ip, ntohs(socket->addr.sin_port));
close(socket->fd);
free(socket);
return 0;
}
int main(void) {
log_info("Initializing salis data server");
log_info("Connecting to database in: %s", DATA_PUSH_PATH);
sql_open();
signal(SIGINT, sig_handler);
signal(SIGTERM, sig_handler);
log_info("Creating response header");
g_response_header = json_object_new_object();
json_object_object_add(g_response_header, "rowid", json_object_new_array());
sql_exec(
0, NULL, NULL,
sql_callback_add_column_name,
g_response_header,
"select name from pragma_table_info('core') union "
"select name from pragma_table_info('arch');"
);
log_info("Binding to port: %d", PORT);
int opt = 1;
int socket_fd = socket(AF_INET, SOCK_STREAM, 0);
setsockopt(socket_fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
struct sockaddr_in socket_addr = { 0 };
socket_addr.sin_family = AF_INET;
socket_addr.sin_addr.s_addr = INADDR_ANY;
socket_addr.sin_port = htons(PORT);
bind(socket_fd, (struct sockaddr *)&socket_addr, sizeof(struct sockaddr_in));
listen(socket_fd, BACKLOG);
log_info("Listening...");
while (true) {
struct Socket *socket = calloc(1, sizeof(struct Socket));
socklen_t socket_len = sizeof(struct sockaddr_in);
socket->fd = accept(socket_fd, (struct sockaddr *)&socket->addr, &socket_len);
thrd_t thrd;
thrd_create(&thrd, (thrd_start_t)handle_client, socket);
thrd_detach(thrd);
}
return 0;
}
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