265 lines
8.4 KiB
C
265 lines
8.4 KiB
C
#include "ssb.connections.h"
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#include "log.h"
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#include "mem.h"
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#include "ssb.h"
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#include "uv.h"
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#include "sqlite3.h"
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#include <string.h>
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#if !defined(_countof)
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#define _countof(a) ((int)(sizeof((a)) / sizeof(*(a))))
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#endif
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typedef struct _tf_ssb_connections_t
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{
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tf_ssb_t* ssb;
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uv_timer_t timer;
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} tf_ssb_connections_t;
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static void _tf_ssb_connections_changed_callback(tf_ssb_t* ssb, tf_ssb_change_t change, tf_ssb_connection_t* connection, void* user_data)
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{
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tf_ssb_connections_t* connections = user_data;
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switch (change)
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{
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case k_tf_ssb_change_create:
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{
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char key[k_id_base64_len];
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if (tf_ssb_connection_get_host(connection) && *tf_ssb_connection_get_host(connection) && tf_ssb_connection_get_port(connection) &&
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tf_ssb_connection_get_id(connection, key, sizeof(key)))
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{
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tf_ssb_connections_set_attempted(connections, tf_ssb_connection_get_host(connection), tf_ssb_connection_get_port(connection), key);
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}
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}
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break;
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case k_tf_ssb_change_connect:
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{
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char key[k_id_base64_len];
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if (tf_ssb_connection_get_id(connection, key, sizeof(key)))
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{
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tf_ssb_connections_set_succeeded(connections, tf_ssb_connection_get_host(connection), tf_ssb_connection_get_port(connection), key);
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}
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}
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break;
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case k_tf_ssb_change_remove:
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case k_tf_ssb_change_update:
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break;
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}
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}
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static bool _tf_ssb_connections_get_next_connection(tf_ssb_connections_t* connections, char* host, size_t host_size, int* port, char* key, size_t key_size)
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{
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bool result = false;
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sqlite3_stmt* statement;
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sqlite3* db = tf_ssb_acquire_db_reader(connections->ssb);
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if (sqlite3_prepare(db, "SELECT host, port, key FROM connections WHERE last_attempt IS NULL OR (strftime('%s', 'now') - last_attempt > ?1) ORDER BY last_attempt LIMIT 1", -1,
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&statement, NULL) == SQLITE_OK)
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{
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if (sqlite3_bind_int(statement, 1, 60000) == SQLITE_OK && sqlite3_step(statement) == SQLITE_ROW)
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{
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snprintf(host, host_size, "%s", sqlite3_column_text(statement, 0));
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*port = sqlite3_column_int(statement, 1);
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snprintf(key, key_size, "%s", sqlite3_column_text(statement, 2));
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result = true;
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}
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sqlite3_finalize(statement);
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}
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else
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{
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tf_printf("prepare: %s\n", sqlite3_errmsg(db));
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}
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tf_ssb_release_db_reader(connections->ssb, db);
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return result;
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}
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typedef struct _tf_ssb_connections_get_next_t
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{
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tf_ssb_connections_t* connections;
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bool ready;
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char host[256];
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int port;
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char key[k_id_base64_len];
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} tf_ssb_connections_get_next_t;
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static void _tf_ssb_connections_get_next_work(tf_ssb_t* ssb, void* user_data)
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{
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tf_ssb_connections_get_next_t* next = user_data;
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if (tf_ssb_is_shutting_down(ssb))
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{
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return;
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}
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next->ready = _tf_ssb_connections_get_next_connection(next->connections, next->host, sizeof(next->host), &next->port, next->key, sizeof(next->key));
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}
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static void _tf_ssb_connections_get_next_after_work(tf_ssb_t* ssb, int status, void* user_data)
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{
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tf_ssb_connections_get_next_t* next = user_data;
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if (next->ready)
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{
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uint8_t key_bin[k_id_bin_len];
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if (tf_ssb_id_str_to_bin(key_bin, next->key))
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{
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tf_ssb_connect(ssb, next->host, next->port, key_bin);
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}
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}
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tf_free(next);
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}
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static void _tf_ssb_connections_timer(uv_timer_t* timer)
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{
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tf_ssb_connections_t* connections = timer->data;
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tf_ssb_connection_t* active[4];
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int count = tf_ssb_get_connections(connections->ssb, active, _countof(active));
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if (count < (int)_countof(active))
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{
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tf_ssb_connections_get_next_t* next = tf_malloc(sizeof(tf_ssb_connections_get_next_t));
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*next = (tf_ssb_connections_get_next_t) {
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.connections = connections,
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};
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tf_ssb_run_work(connections->ssb, _tf_ssb_connections_get_next_work, _tf_ssb_connections_get_next_after_work, next);
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}
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}
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tf_ssb_connections_t* tf_ssb_connections_create(tf_ssb_t* ssb)
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{
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tf_ssb_connections_t* connections = tf_malloc(sizeof(tf_ssb_connections_t));
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memset(connections, 0, sizeof(*connections));
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connections->ssb = ssb;
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tf_ssb_add_connections_changed_callback(ssb, _tf_ssb_connections_changed_callback, NULL, connections);
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uv_loop_t* loop = tf_ssb_get_loop(ssb);
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connections->timer.data = connections;
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uv_timer_init(loop, &connections->timer);
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uv_timer_start(&connections->timer, _tf_ssb_connections_timer, 2000, 2000);
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uv_unref((uv_handle_t*)&connections->timer);
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return connections;
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}
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static void _tf_ssb_connections_on_handle_close(uv_handle_t* handle)
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{
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tf_ssb_connections_t* connections = handle->data;
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handle->data = NULL;
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tf_free(connections);
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}
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void tf_ssb_connections_destroy(tf_ssb_connections_t* connections)
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{
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uv_close((uv_handle_t*)&connections->timer, _tf_ssb_connections_on_handle_close);
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}
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typedef struct _tf_ssb_connections_update_t
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{
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char host[256];
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int port;
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char key[k_id_base64_len];
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bool attempted;
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bool succeeded;
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} tf_ssb_connections_update_t;
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static void _tf_ssb_connections_update_work(tf_ssb_t* ssb, void* user_data)
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{
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tf_ssb_connections_update_t* update = user_data;
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if (tf_ssb_is_shutting_down(ssb))
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{
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return;
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}
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sqlite3_stmt* statement;
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sqlite3* db = tf_ssb_acquire_db_writer(ssb);
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if (update->attempted)
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{
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if (sqlite3_prepare(db, "UPDATE connections SET last_attempt = strftime('%s', 'now') WHERE host = ?1 AND port = ?2 AND key = ?3", -1, &statement, NULL) == SQLITE_OK)
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{
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if (sqlite3_bind_text(statement, 1, update->host, -1, NULL) == SQLITE_OK && sqlite3_bind_int(statement, 2, update->port) == SQLITE_OK &&
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sqlite3_bind_text(statement, 3, update->key, -1, NULL) == SQLITE_OK)
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{
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if (sqlite3_step(statement) != SQLITE_DONE)
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{
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tf_printf("tf_ssb_connections_set_attempted: %s.\n", sqlite3_errmsg(db));
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}
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}
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sqlite3_finalize(statement);
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}
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}
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else if (update->succeeded)
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{
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if (sqlite3_prepare(db, "UPDATE connections SET last_success = strftime('%s', 'now') WHERE host = ?1 AND port = ?2 AND key = ?3", -1, &statement, NULL) == SQLITE_OK)
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{
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if (sqlite3_bind_text(statement, 1, update->host, -1, NULL) == SQLITE_OK && sqlite3_bind_int(statement, 2, update->port) == SQLITE_OK &&
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sqlite3_bind_text(statement, 3, update->key, -1, NULL) == SQLITE_OK)
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{
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if (sqlite3_step(statement) != SQLITE_DONE)
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{
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tf_printf("tf_ssb_connections_set_succeeded: %s.\n", sqlite3_errmsg(db));
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}
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}
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sqlite3_finalize(statement);
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}
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}
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else
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{
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if (sqlite3_prepare(db, "INSERT INTO connections (host, port, key) VALUES (?1, ?2, ?3) ON CONFLICT DO NOTHING", -1, &statement, NULL) == SQLITE_OK)
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{
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if (sqlite3_bind_text(statement, 1, update->host, -1, NULL) == SQLITE_OK && sqlite3_bind_int(statement, 2, update->port) == SQLITE_OK &&
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sqlite3_bind_text(statement, 3, update->key, -1, NULL) == SQLITE_OK)
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{
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int r = sqlite3_step(statement);
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if (r != SQLITE_DONE)
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{
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tf_printf("tf_ssb_connections_store: %d, %s.\n", r, sqlite3_errmsg(db));
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}
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}
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sqlite3_finalize(statement);
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}
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}
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tf_ssb_release_db_writer(ssb, db);
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}
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static void _tf_ssb_connections_update_after_work(tf_ssb_t* ssb, int status, void* user_data)
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{
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tf_free(user_data);
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}
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static void _tf_ssb_connections_queue_update(tf_ssb_connections_t* connections, tf_ssb_connections_update_t* update)
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{
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tf_ssb_run_work(connections->ssb, _tf_ssb_connections_update_work, _tf_ssb_connections_update_after_work, update);
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}
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void tf_ssb_connections_store(tf_ssb_connections_t* connections, const char* host, int port, const char* key)
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{
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tf_ssb_connections_update_t* update = tf_malloc(sizeof(tf_ssb_connections_update_t));
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*update = (tf_ssb_connections_update_t) {
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.port = port,
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};
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snprintf(update->host, sizeof(update->host), "%s", host);
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snprintf(update->key, sizeof(update->key), "%s", key);
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_tf_ssb_connections_queue_update(connections, update);
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}
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void tf_ssb_connections_set_attempted(tf_ssb_connections_t* connections, const char* host, int port, const char* key)
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{
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tf_ssb_connections_update_t* update = tf_malloc(sizeof(tf_ssb_connections_update_t));
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*update = (tf_ssb_connections_update_t) {
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.port = port,
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.attempted = true,
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};
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snprintf(update->host, sizeof(update->host), "%s", host);
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snprintf(update->key, sizeof(update->key), "%s", key);
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_tf_ssb_connections_queue_update(connections, update);
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}
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void tf_ssb_connections_set_succeeded(tf_ssb_connections_t* connections, const char* host, int port, const char* key)
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{
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tf_ssb_connections_update_t* update = tf_malloc(sizeof(tf_ssb_connections_update_t));
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*update = (tf_ssb_connections_update_t) {
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.port = port,
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.succeeded = true,
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};
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snprintf(update->host, sizeof(update->host), "%s", host);
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snprintf(update->key, sizeof(update->key), "%s", key);
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_tf_ssb_connections_queue_update(connections, update);
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}
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