void error_cb(struct bufferevent *bev, short event, void *arg)
{
evutil_socket_t fd = bufferevent_getfd(bev);
printf("fd = %u, ", fd);
if (event & BEV_EVENT_TIMEOUT) {
printf("Timed out\n"); //if bufferevent_set_timeouts() called
}
else if (event & BEV_EVENT_EOF) {
printf("connection closed\n");
}
else if (event & BEV_EVENT_ERROR) {
printf("some other error\n");
}
bufferevent_free(bev);
}
/* 事件回调函数，连接状态改变时回调的函数 */
void event_cb(struct bufferevent *bev, short events, void *ptr)
{
struct event_base *tbase = (struct event_base*)ptr;
if ( events & BEV_EVENT_CONNECTED){
/* We're connected to server. Ordinarily we'd do
something here, like start reading or writing. */
evutil_socket_t fd = bufferevent_getfd(bev);
set_tcp_no_delay(fd);
printf("Server is connected!\n");
}else { //如果连接不成功的消息，就停止事件循环
bufferevent_free(bev);
event_base_loopbreak(tbase);
printf("Server connect erro!! or The connect have been shutdown: %X\n", events);
}
}
void listencb(struct evconnlistener *listener, evutil_socket_t clisockfd, struct sockaddr *addr, int len, void *ptr) {
struct event_base *eb = evconnlistener_get_base(listener);
struct bufferevent *bev = bufferevent_socket_new(eb, clisockfd, BEV_OPT_CLOSE_ON_FREE);
LOG("a user logined in, socketfd = %d", bufferevent_getfd(bev));
//create a user
user_t *user = user_create();
user->wscon->bev = bev;
user_vec.push_back(user);
//ws_conn_setcb(wscon, HANDSHAKE, testfunc, (void*)"haha");
ws_conn_setcb(user->wscon, FRAME_RECV, frame_recv_cb, user);
ws_conn_setcb(user->wscon, CLOSE, user_disconnect_cb, user);
ws_serve_start(user->wscon);
}
void read_cb(struct bufferevent*bev, void*arg)//循环读取套接字里的内容；
{
#define MAX_LINE 256
char line[MAX_LINE+1]={0};
QR_HEAD *head;
QA_HEAD qa_head;
memset(&qa_head, 0, sizeof(QA_HEAD));
qa_head.package_len = 232;
qa_head.package_id = 11;
HashNode **getinfo;//储存查询结果信息；
int n;
int i=0;
char *buf = malloc(sizeof(QA_HEAD)+4096);
evutil_socket_t fd = bufferevent_getfd(bev);//获取套接字描述符；
while(n = bufferevent_read(bev, line, MAX_LINE), n>0)//读取套接字中的内容；
{
head = (QR_HEAD*)line;
printf("len %d\n", head->package_len);
printf("id %d\n", head->package_id);
printf("fd = %u, readline:%s", fd, (char*)(line+sizeof(QR_HEAD)));
if(head->package_id == 9)//检测是不是reload包，通知重载hash表；
{
update_hash_table();//重载hash表内容；
continue;
}
getinfo = hash_table_lookup(line+sizeof(QA_HEAD));//查询hash表;
if(getinfo == NULL)//如果没有查询到响应的信息，设置包长度为包头长度；
{
qa_head.package_len = 8;
memcpy(buf, &qa_head, sizeof(QA_HEAD));
}
else
{
i = 0;
while(getinfo[i])//循环往包里添加查询到的数据；
{
memcpy(buf+sizeof(QA_HEAD)+i*sizeof(INFOR), getinfo[i]->infor, sizeof(INFOR));
i++;
}
qa_head.package_len = sizeof(QA_HEAD)+i*sizeof(INFOR);
memcpy(buf, &qa_head, sizeof(QA_HEAD));
}
bufferevent_write(bev, buf, sizeof(QA_HEAD)+4096);//发包；
}
}
void CBareConnection::conn_event(bufferevent* bev, short event, void* ctx)
{
assert(bev != nullptr);
assert(ctx != nullptr);
CBareConnection* data = static_cast<CBareConnection*>(ctx);
if ((event & BEV_EVENT_CONNECTED) != 0)
data->OnConnectSuccess(std::move(data->m_bev));
else {
evutil_socket_t sock = bufferevent_getfd(bev);
(void)sock;
// sock may be BAD_SOCKET here if it wasn't successfully created.
int error = evutil_socket_geterror(sock);
data->m_bev.free();
data->OnConnectFailure(event, error);
}
}
void buf_write_callback(struct bufferevent *incoming,
void *arg)
{
conn *c;
c = (conn*) arg;
assert(c != NULL);
int fd;
fd = (int)bufferevent_getfd(incoming);
if (fd != c->sfd){
perror("fd != sfd");
conn_close(c);
return;
}
drive_machine(c, incoming);
return;
}
void QueryListener::onEvent(bufferevent *bufEvent, short events, void *arg) {
QueryListener *_this = static_cast<QueryListener *>(arg);
evutil_socket_t fd = bufferevent_getfd(bufEvent);
// If socket is closed - delete it from the collection
if (events & BEV_EVENT_EOF) {
LogD(TAG, "event: BEV_EVENT_EOF fd=" + std::to_string(fd));
_this->connections.erase(bufEvent);
}
if (events & BEV_EVENT_ERROR) {
LogD(TAG, "event: BEV_EVENT_ERROR fd=" + std::to_string(fd));
}
}
const string TcpTransport::getPeerAddrAndPort() {
struct sockaddr_in broker;
socklen_t cLen = sizeof(broker);
// getsockname(m_socket->getRawSocketHandle(), (struct sockaddr*) &s, &sLen);
// // ! use connectSock here.
getpeername(bufferevent_getfd(m_bufferEvent), (struct sockaddr *)&broker,
&cLen); // ! use connectSock here.
LOG_DEBUG("broker addr: %s, broker port: %d", inet_ntoa(broker.sin_addr),
ntohs(broker.sin_port));
string brokerAddr(inet_ntoa(broker.sin_addr));
brokerAddr.append(":");
string brokerPort(UtilAll::to_string(ntohs(broker.sin_port)));
brokerAddr.append(brokerPort);
LOG_DEBUG("brokerAddr:%s", brokerAddr.c_str());
return brokerAddr;
}
/* eventcb for bufferevent. For the purpose of simplicity and
readability of the example program, we omitted the certificate and
peer verification. After SSL/TLS handshake is over, initialize
nghttp2 library session, and send client connection header. Then
send HTTP request. */
static void eventcb(struct bufferevent *bev, short events, void *ptr) {
http2_session_data *session_data = (http2_session_data *)ptr;
if (events & BEV_EVENT_CONNECTED) {
int fd = bufferevent_getfd(bev);
int val = 1;
const unsigned char *alpn = NULL;
unsigned int alpnlen = 0;
SSL *ssl;
fprintf(stderr, "Connected\n");
ssl = bufferevent_openssl_get_ssl(session_data->bev);
#ifndef OPENSSL_NO_NEXTPROTONEG
SSL_get0_next_proto_negotiated(ssl, &alpn, &alpnlen);
#endif /* !OPENSSL_NO_NEXTPROTONEG */
#if OPENSSL_VERSION_NUMBER >= 0x10002000L
if (alpn == NULL) {
SSL_get0_alpn_selected(ssl, &alpn, &alpnlen);
}
#endif /* OPENSSL_VERSION_NUMBER >= 0x10002000L */
if (alpn == NULL || alpnlen != 2 || memcmp("h2", alpn, 2) != 0) {
fprintf(stderr, "h2 is not negotiated\n");
delete_http2_session_data(session_data);
return;
}
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
initialize_nghttp2_session(session_data);
send_client_connection_header(session_data);
submit_request(session_data);
if (session_send(session_data) != 0) {
delete_http2_session_data(session_data);
}
return;
}
if (events & BEV_EVENT_EOF) {
warnx("Disconnected from the remote host");
} else if (events & BEV_EVENT_ERROR) {
warnx("Network error");
} else if (events & BEV_EVENT_TIMEOUT) {
warnx("Timeout");
}
delete_http2_session_data(session_data);
}
void cache_init_packet_from_server() {
socklen_t len;
struct bufferevent *bev;
struct bev_arg *bev_arg;
struct destination *destination=first_destination;
struct sockaddr *s;
bev = bufferevent_socket_new(event_base, -1, BEV_OPT_CLOSE_ON_FREE);
bev_arg=malloc(sizeof (struct bev_arg));
bev_arg->type=BEV_CACHE;
bev_arg->bev=bev;
bev_arg->remote=NULL;
/* set callback functions and argument */
bufferevent_setcb(bev, cache_mysql_init_packet_read_callback, NULL, cache_mysql_init_packet_event_callback, (void *)bev_arg);
/* read buffer 64kb */
bufferevent_setwatermark(bev, EV_READ, 0, INPUT_BUFFER_LIMIT);
if (destination->s[0] == SOCKET_TCP) {
s = (struct sockaddr *) &destination->sin;
len = destination->addrlen;
} else {
s = (struct sockaddr *) &destination->sun;
len = destination->addrlen;
}
/* event_callback() will be called after nonblock connect() return
*/
if (bufferevent_socket_connect(bev, s, len)==-1) {
bufferevent_free(bev);
free(bev_arg);
}
struct linger l;
l.l_onoff=1;
l.l_linger=0;
setsockopt(bufferevent_getfd(bev), SOL_SOCKET, SO_LINGER, (void *) &l, sizeof (l));
bufferevent_enable(bev, EV_READ);
}
void read_cb(struct bufferevent *bev, void *arg) {
#define MAX_LINE 2560
char line[MAX_LINE + 1];
char output[1000];
int n;
evutil_socket_t fd = bufferevent_getfd(bev);
while (n = bufferevent_read(bev, line, MAX_LINE), n > 0) {
line[n] = '\0';
printf("fd=%u, read line: %s\n", fd, line);
worker((int) fd, line, output);
printf("out line: %s,len=%d\n", output,strlen(output));
bufferevent_write(bev, output, strlen(output));
}
//close(fd);
}
// 改成用bufferevent之后，接受的参数得改。。。
void event_handler(struct bufferevent *incoming, void *arg) {
conn *c;
c = (conn *)arg;
assert(c != NULL);
// c->which = which;
int fd;
fd = (int)bufferevent_getfd(incoming);
if (fd != c->sfd)
{
perror("fd != sfd");
conn_close(c);
return;
}
drive_machine(c, incoming);
return;
}
void MessageManager::ErrorDispatcher(struct bufferevent *bev, short error, void *ctx)
{
if(error & BEV_EVENT_CONNECTED)
{
LOG(DEBUG, "New connection established", "");
return;
}
if(error & (BEV_EVENT_EOF | BEV_EVENT_ERROR))
{
//If we're a server...
if(ctx != NULL)
{
bufferevent_free(bev);
MessageManager::Instance().DeleteEndpoint(bufferevent_getfd(bev));
}
return;
}
}
zend_string * ion_stream_get_name_remote(ion_stream * stream) {
int type = 0;
evutil_socket_t socket;
if(stream->name_remote == NULL) {
if(!stream->buffer) {
return NULL;
}
socket = bufferevent_getfd(stream->buffer);
if(socket == -1) {
return NULL;
} else {
type = pion_net_sock_name(socket, PION_NET_NAME_REMOTE, &stream->name_remote);
if(type == PION_NET_NAME_UNKNOWN || type == FAILURE) {
return NULL;
}
}
}
return zend_string_copy(stream->name_remote);
}
static void
ssh_handshake_cb(obfsproxyssh_client_session_t *session)
{
int rval;
evutil_socket_t fd = bufferevent_getfd(session->ssh_ev);
rval = libssh2_session_handshake(session->ssh_session, fd);
if (LIBSSH2_ERROR_EAGAIN == rval)
return;
else if (0 != rval || 0 != ssh_validate_hostkey(session)) {
libssh2_session_free(session->ssh_session);
session->ssh_session = NULL;
session_free(session);
return;
}
session->libssh2_cb = ssh_auth_cb;
session->libssh2_cb(session);
}
void TcpTransport::eventcb(struct bufferevent *bev, short what, void *ctx) {
evutil_socket_t fd = bufferevent_getfd(bev);
TcpTransport *tcpTrans = (TcpTransport *)ctx;
LOG_INFO("eventcb: received event:%x on fd:%d", what, fd);
if (what & BEV_EVENT_CONNECTED) {
int val = 1;
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
LOG_INFO("eventcb:connect to fd:%d successfully", fd);
tcpTrans->setTcpConnectEvent(e_connectSuccess);
} else if (what & (BEV_EVENT_ERROR | BEV_EVENT_EOF | BEV_EVENT_READING |
BEV_EVENT_WRITING)) {
LOG_INFO("eventcb:rcv error event cb:%x on fd:%d", what, fd);
tcpTrans->setTcpConnectEvent(e_connectFail);
bufferevent_setcb(bev, NULL, NULL, NULL, NULL);
// bufferevent_disable(bev, EV_READ|EV_WRITE);
// bufferevent_free(bev);
} else {
LOG_ERROR("eventcb: received error event:%d on fd:%d", what, fd);
}
}
static void connecting_event_cb(struct bufferevent *bev, short what, void *arg)
{
CONNECTOR *cr = (CONNECTOR *)arg;
if (!(what & BEV_EVENT_CONNECTED))
{
PUTS("connecting failed!, %d", time(NULL) );
if (0 == cr->keep_connect)
{
CONNECTOR_CALLBACK *cb = cr->cb;
if ( cb->onConnect)
(*(cb->onConnect))(cr, 0);
}
else
{
//delay_connecting(c);
reconnect(cr, 5);
}
}
else
{
CONNECTOR_CALLBACK *cb = cr->cb;
int fd = bufferevent_getfd(bev);
struct linger l;
PUTS("connect %s success!%d", cr->addrtext, time(NULL));
cr->state = STATE_CONNECTED;
if (cb->onConnect)
(*(cb->onConnect))(cr, 1);
/* prevent CLOSE_WAIT */
l.l_onoff = 1;
l.l_linger = 0;
setsockopt(fd, SOL_SOCKET, SO_LINGER, (const char *)&l, sizeof(l));
bufferevent_setcb(bev, read_client_cb, conn_write_cb, conn_event_cb2, cr);
bufferevent_enable(bev, EV_READ);
}
}
void read_cb(struct bufferevent *bev, void *arg)
{
#define MAX_LINE 256
char line[MAX_LINE+1];
int n;
evutil_socket_t fd = bufferevent_getfd(bev);
net_para_t net;
while (n = bufferevent_read(bev, line, MAX_LINE), n > 0) {
line[n] = '\0';
printf("fd=%u, read line: %s\n", fd, line);
net.net = bev;
net.print = net_print;
parse_and_exec_cmd(line, ifs_cmd_list, &net);
line[0] = '>';
line[1] = 0;
bufferevent_write(bev, line, 2);
}
}
//解析从Server发出的数据
bool TcpClient::DealWithData(struct bufferevent *bev, const char*pData, int nLen)
{
evutil_socket_t fd = bufferevent_getfd(bev);
struct sockaddr_in sin;
int nsocketLen = sizeof(SOCKADDR);
char cIPParse[16];
ushort port;
if (getpeername(fd, (struct sockaddr*)&sin, &nsocketLen) == 0)
{
inet_ntop(AF_INET, (void *)&sin.sin_addr, cIPParse, 16);
port = ntohs(sin.sin_port);
}
m_pPacket->AppendRecvData(nLen, (byte*)pData);
SolarPacket* pPacketData = m_pPacket->PullRecvPacket();
if (pPacketData != NULL)
{
switch (pPacketData->byteCmd)
{
case 0x10:
break;
case 0x11:
break;
case 0x12:
break;
case 0x13:
break;
case 0x14:
break;
case 0x15:
break;
}
SolarTcpIpPacket::DestroySolarPacket(pPacketData);
}
return false;
}
struct bufferevent* red_connect_relay(const char *ifname,
struct sockaddr_in *addr,
bufferevent_data_cb readcb,
bufferevent_data_cb writecb,
bufferevent_event_cb errorcb,
void *cbarg,
const struct timeval *timeout_write)
{
struct bufferevent *retval = NULL;
int relay_fd = -1;
int error;
retval = red_prepare_relay(ifname, readcb, writecb, errorcb, cbarg);
if (retval) {
relay_fd = bufferevent_getfd(retval);
if (timeout_write)
bufferevent_set_timeouts(retval, NULL, timeout_write);
// error = bufferevent_socket_connect(retval, (struct sockaddr*)addr, sizeof(*addr));
// if (error) {
error = connect(relay_fd, (struct sockaddr*)addr, sizeof(*addr));
if (error && errno != EINPROGRESS) {
log_errno(LOG_NOTICE, "connect");
goto fail;
}
}
return retval;
fail:
if (retval) {
bufferevent_disable(retval, EV_READ|EV_WRITE);
bufferevent_free(retval);
}
if (relay_fd != -1)
redsocks_close(relay_fd);
return NULL;
}
// error event socket ( all client socket)
// connecting socket (client side client)
static void sock_buffer_error_event(bufferevent *bev, short what, void *arg)
{
coro_sock *sock = (coro_sock *)arg;
coro_event ev;
ev.sock = bufferevent_getfd(bev);
ev.sock = sock->sock;
if ( what & BEV_EVENT_ERROR ) {
SET_ERROR(sock->status);
ev.event = SOCK_ERROR_NOTIFY;
}
else if ( what & BEV_EVENT_EOF ) {
ev.event = SOCK_EOF_NOTIFY;
SET_EOF(sock->status);
if ( evbuffer_get_length(bufferevent_get_input(sock->bev)) ) {
SET_READ(sock->status);
// printf("set read: %d\n", ev.sock);
}
}
else {
; // pass
}
sock->ctx->curev.push(ev);
coro_yield_uthread(__g_coroutine_ctx->io, 0);
}
int
bufferevent_socket_connect(struct bufferevent *bev,
struct sockaddr *sa, int socklen)
{
struct bufferevent_private *bufev_p =
EVUTIL_UPCAST(bev, struct bufferevent_private, bev);
evutil_socket_t fd;
int r = 0;
int result=-1;
int ownfd = 0;
bufferevent_incref_and_lock_(bev);
if (!bufev_p)
goto done;
fd = bufferevent_getfd(bev);
if (fd < 0) {
if (!sa)
goto done;
fd = evutil_socket_(sa->sa_family,
SOCK_STREAM|EVUTIL_SOCK_NONBLOCK, 0);
if (fd < 0)
goto done;
ownfd = 1;
}
if (sa) {
#ifdef _WIN32
if (bufferevent_async_can_connect_(bev)) {
bufferevent_setfd(bev, fd);
r = bufferevent_async_connect_(bev, fd, sa, socklen);
if (r < 0)
goto freesock;
bufev_p->connecting = 1;
result = 0;
goto done;
} else
#endif
r = evutil_socket_connect_(&fd, sa, socklen);
if (r < 0)
goto freesock;
}
#ifdef _WIN32
/* ConnectEx() isn't always around, even when IOCP is enabled.
* Here, we borrow the socket object's write handler to fall back
* on a non-blocking connect() when ConnectEx() is unavailable. */
if (BEV_IS_ASYNC(bev)) {
event_assign(&bev->ev_write, bev->ev_base, fd,
EV_WRITE|EV_PERSIST, bufferevent_writecb, bev);
}
#endif
bufferevent_setfd(bev, fd);
if (r == 0) {
if (! be_socket_enable(bev, EV_WRITE)) {
bufev_p->connecting = 1;
result = 0;
goto done;
}
} else if (r == 1) {
/* The connect succeeded already. How very BSD of it. */
result = 0;
bufev_p->connecting = 1;
event_active(&bev->ev_write, EV_WRITE, 1);
} else {
/* The connect failed already. How very BSD of it. */
bufev_p->connection_refused = 1;
bufev_p->connecting = 1;
result = 0;
event_active(&bev->ev_write, EV_WRITE, 1);
}
goto done;
freesock:
bufferevent_run_eventcb_(bev, BEV_EVENT_ERROR);
if (ownfd)
evutil_closesocket(fd);
/* do something about the error? */
done:
bufferevent_decref_and_unlock_(bev);
return result;
}
/*
* accept socket, then create buffer events for self and remote
*/
void accept_connect(int sock, short event, void *arg) {
struct listener *listener=(struct listener *)arg;
socklen_t len;
struct sockaddr_in sin;
struct sockaddr_un sun;
int csock=0;
struct bufferevent *bev_client, *bev_target;
struct bev_arg *bev_arg_client, *bev_arg_target;
struct destination *destination=first_destination;
struct sockaddr *s=NULL;
if (listener->s[0]==SOCKET_TCP) {
len = sizeof(struct sockaddr_in);
s = (struct sockaddr *) &sin;
} else if (listener->s[0]==SOCKET_UNIX) {
len = sizeof(struct sockaddr_un);
s = (struct sockaddr *) &sun;
}
csock=accept(sock, s, &len);
if (csock==-1) {
return;
}
fcntl(csock, F_SETFL, O_RDWR|O_NONBLOCK);
listener->nr_allconn++;
/* the first turn the switch on */
/* the last turn the switch off*/
listener->nr_conn++;
bev_client = bufferevent_socket_new(event_base, csock, BEV_OPT_CLOSE_ON_FREE);
bev_target = bufferevent_socket_new(event_base, -1, BEV_OPT_CLOSE_ON_FREE);
/* CLIENT bev_arg*/
/* parameter for callback functions */
bev_arg_client=malloc(sizeof (struct bev_arg));
bev_arg_client->type=BEV_CLIENT;
bev_arg_client->listener=listener;
bev_arg_client->bev=bev_client;
bev_arg_client->connecting=0;
/* set callback functions and argument */
if (listener->type==LISTENER_DEFAULT) {
if (!mysql_cdb_file) {
bufferevent_setcb(bev_client, read_callback, NULL, event_callback, (void *)bev_arg_client);
} else {
/* if mysql_cdb is enabled, use different callback functions */
bev_arg_client->ms=init_ms();
bufferevent_setcb(bev_client, mysql_read_callback, NULL, mysql_event_callback, (void *)bev_arg_client);
}
} else if (listener->type==LISTENER_STATS) {
bufferevent_setcb(bev_client, NULL, stats_write_callback, stats_event_callback, (void *)bev_arg_client);
send_stats_to_client(bev_client);
return;
}
/* read buffer 64kb */
bufferevent_setwatermark(bev_client, EV_READ, 0, INPUT_BUFFER_LIMIT);
/* TARGET bev_arg*/
/* parameter for callback functions */
bev_arg_target=malloc(sizeof (struct bev_arg));
bev_arg_target->type=BEV_TARGET;
bev_arg_target->connecting=0;
bev_arg_client->remote=bev_arg_target;
/* set callback functions and argument */
bev_arg_target->listener=listener;
bev_arg_target->bev=bev_target;
bev_arg_target->remote=bev_arg_client;
if (!mysql_cdb_file) {
bufferevent_setcb(bev_target, read_callback, NULL, event_callback, (void *)bev_arg_target);
} else {
/* mysql_stuff structure is same for client and target bufferevent */
bev_arg_target->ms=bev_arg_client->ms;
bufferevent_setcb(bev_target, mysql_read_callback, NULL, mysql_event_callback, (void *)bev_arg_target);
}
/* read buffer 64kb */
bufferevent_setwatermark(bev_target, EV_READ, 0, INPUT_BUFFER_LIMIT);
if (destination->s[0] == SOCKET_TCP) {
s = (struct sockaddr *) &destination->sin;
len = destination->addrlen;
} else {
s = (struct sockaddr *) &destination->sun;
len = destination->addrlen;
}
/* we can use cached init packet only if we can use MITM attack,
* we can use MITM attack only if we use mysql_cdb_file where are hashed user passwords
*/
if (!mysql_cdb_file || (mysql_cdb_file && !cache_mysql_init_packet)) {
bev_arg_target->connecting=1;
if (bufferevent_socket_connect(bev_target, s, len)==-1) {
listener->nr_conn--;
bufferevent_free(bev_client);
bufferevent_free(bev_target);
free(bev_arg_client);
free(bev_arg_target);
}
bev_arg_target->connecting=0;
struct linger l;
l.l_onoff=1;
l.l_linger=0;
setsockopt(bufferevent_getfd(bev_target), SOL_SOCKET, SO_LINGER, (void *) &l, sizeof (l));
} else {
/* use cached init packet */
bev_arg_client->remote=NULL;
bev_arg_client->ms->not_need_remote=1;
bev_arg_client->ms->handshake=1;
/* we use bev_arg_client and ms pointers as random data for generating random string filled in init packet send to client */
/* TODO: use better random input */
bev_arg_client->ms->scramble1=set_random_scramble_on_init_packet(cache_mysql_init_packet, bev_arg_target, bev_arg_client->ms);
bufferevent_free(bev_target);
free(bev_arg_target);
if (bufferevent_write(bev_client, cache_mysql_init_packet, cache_mysql_init_packet_len)==-1) {
listener->nr_conn--;
bufferevent_free(bev_client);
bufferevent_free(bev_target);
free(bev_arg_client);
free(bev_arg_target);
}
bufferevent_enable(bev_client, EV_READ);
}
}
static void on_read(struct bufferevent *bev, void *ctx) {
struct evbuffer *input;
int fd;
size_t len;
char *line;
char *emsg;
char **argv = malloc(sizeof(char *));
int argc = 0;
char *arg_ptr, *save_ptr;
/*
* 1: Unknown command
* 2: Too few arguments
* 3: Internal error
* 4: Missing command
*/
int status;
int i;
input = bufferevent_get_input(bev);
fd = bufferevent_getfd(bev);
len = evbuffer_get_length(input);
line = malloc(len + 1);
evbuffer_copyout(input, line, len);
if (len == 0) {
status = 4;
goto END;
}
if (line[len - 1] == '\n') {
line[len - 1] = 0;
} else {
line[len] = 0;
}
arg_ptr = strtok_r(line, " ", &save_ptr);
while (arg_ptr != NULL) {
len = strlen(arg_ptr) + 1;
argv[argc] = malloc(len);
strncpy(argv[argc], arg_ptr, len);
argv = realloc(argv, argc + 1);
arg_ptr = strtok_r(NULL, " ", &save_ptr);
argc++;
}
printf("%s LookingGlass: Received command \"%s\" with %d arguments", date(), argv[0], argc - 1);
for (i = 1; i < argc; i++) {
printf(" %d:\"%s\"", i, argv[i]);
}
printf(".\n");
status = call_function(argv[0], fd, argc, argv);
END:
switch (status) {
case 1:
emsg = "Unknown command";
write(fd, emsg, strlen(emsg));
fprintf(stdout, "%s LookingGlass: Error: Disconnecting client. Reason: %s: %s.\n", date(), emsg, argv[0]);
break;
case 2:
emsg = "Too few arguments";
write(fd, emsg, strlen(emsg));
fprintf(stdout, "%s LookingGlass: Disconnecting client. Error: %s.\n", date(), emsg);
break;
case 3:
emsg = "Internal error";
write(fd, emsg, strlen(emsg));
fprintf(stdout, "%s LookingGlass: Disconnecting client. Error: %s.\n", date(), emsg);
break;
case 4:
emsg = "Missing command";
write(fd, emsg, strlen(emsg));
fprintf(stdout, "%s LookingGlass: Disconnecting client. Error: %s.\n", date(), emsg);
break;
default:
printf("%s LookingGlass: Disconnecting client.\n", date());
break;
}
bufferevent_free(bev);
for (i = 0; i < argc; i++) {
free(argv[i]);
}
free(argv);
free(line);
}
struct bufferevent* red_connect_relay_tfo(const char *ifname,
struct sockaddr_in *addr,
bufferevent_data_cb readcb,
bufferevent_data_cb writecb,
bufferevent_event_cb errorcb,
void *cbarg,
const struct timeval *timeout_write,
void *data,
size_t *len)
{
struct bufferevent *retval = NULL;
int relay_fd = -1;
int error;
retval = red_prepare_relay(ifname, readcb, writecb, errorcb, cbarg);
if (retval) {
relay_fd = bufferevent_getfd(retval);
if (timeout_write)
bufferevent_set_timeouts(retval, NULL, timeout_write);
#ifdef MSG_FASTOPEN
size_t s = sendto(relay_fd, data, * len, MSG_FASTOPEN,
(struct sockaddr *)addr, sizeof(*addr)
);
*len = 0; // Assume nothing sent, caller needs to write data again when connection is setup.
if (s == -1) {
if (errno == EINPROGRESS || errno == EAGAIN
|| errno == EWOULDBLOCK) {
// Remote server doesn't support tfo or it's the first connection to the server.
// Connection will automatically fall back to conventional TCP.
log_error(LOG_DEBUG, "TFO: no cookie");
return retval;
} else if (errno == EOPNOTSUPP || errno == EPROTONOSUPPORT ||
errno == ENOPROTOOPT) {
// Disable fast open as it's not supported
log_error(LOG_DEBUG, "TFO: not support");
goto fallback;
} else {
log_errno(LOG_NOTICE, "sendto");
goto fail;
}
}
else {
log_error(LOG_DEBUG, "TFO: cookie found");
*len = s; // data is put into socket buffer
return retval;
}
fallback:
#endif
error = connect(relay_fd, (struct sockaddr*)addr, sizeof(*addr));
if (error && errno != EINPROGRESS) {
log_errno(LOG_NOTICE, "connect");
goto fail;
}
// write data to evbuffer so that data can be sent when connection is set up
if (bufferevent_write(retval, data, *len) != 0) {
log_errno(LOG_NOTICE, "bufferevent_write");
*len = 0; // Nothing sent, caller needs to write data again when connection is setup.
goto fail;
}
}
return retval;
fail:
if (retval) {
bufferevent_disable(retval, EV_READ|EV_WRITE);
bufferevent_free(retval);
}
if (relay_fd != -1)
redsocks_close(relay_fd);
return NULL;
}
struct bufferevent* red_connect_relay_ssl(const char *ifname,
struct sockaddr_in *addr,
SSL * ssl,
bufferevent_data_cb readcb,
bufferevent_data_cb writecb,
bufferevent_event_cb errorcb,
void *cbarg,
const struct timeval *timeout_write)
{
struct bufferevent *retval = NULL;
struct bufferevent *underlying = NULL;
int relay_fd = -1;
int error;
underlying = red_prepare_relay(ifname, NULL, NULL, NULL, NULL);
if (!underlying)
goto fail;
relay_fd = bufferevent_getfd(underlying);
if (timeout_write)
bufferevent_set_timeouts(underlying, NULL, timeout_write);
error = connect(relay_fd, (struct sockaddr*)addr, sizeof(*addr));
if (error && errno != EINPROGRESS) {
log_errno(LOG_NOTICE, "connect");
goto fail;
}
retval = bufferevent_openssl_filter_new(bufferevent_get_base(underlying),
underlying,
ssl,
BUFFEREVENT_SSL_CONNECTING,
BEV_OPT_DEFER_CALLBACKS);
if (!retval) {
log_errno(LOG_NOTICE, "bufferevent_openssl_filter_new");
goto fail;
}
if (timeout_write)
bufferevent_set_timeouts(retval, NULL, timeout_write);
bufferevent_setcb(retval, readcb, writecb, errorcb, cbarg);
if (writecb) {
error = bufferevent_enable(retval, EV_WRITE); // we wait for connection...
if (error) {
log_errno(LOG_ERR, "bufferevent_enable");
goto fail;
}
}
return retval;
fail:
if (retval) {
bufferevent_disable(retval, EV_READ|EV_WRITE);
bufferevent_free(retval);
}
if (underlying) {
bufferevent_disable(underlying, EV_READ|EV_WRITE);
bufferevent_free(underlying);
}
if (relay_fd != -1)
redsocks_close(relay_fd);
return NULL;
}
void ConnectionWrapper::init(bufferevent *bufEvent) {
assert(bufEvent != nullptr);
this->bufEvent = bufEvent;
this->fd = bufferevent_getfd(bufEvent);
LogD(TAG, "Connection established fd=" + std::to_string(fd));
}
bool ConnectToNovad()
{
if(IsNovadUp(false))
{
return true;
}
DisconnectFromNovad();
//Create new base
if(libeventBase == NULL)
{
evthread_use_pthreads();
libeventBase = event_base_new();
pthread_mutex_init(&bufferevent_mutex, NULL);
}
//Builds the key path
string key = Config::Inst()->GetPathHome();
key += "/config/keys";
key += NOVAD_LISTEN_FILENAME;
//Builds the address
struct sockaddr_un novadAddress;
novadAddress.sun_family = AF_UNIX;
memset(novadAddress.sun_path, '\0', sizeof(novadAddress.sun_path));
strncpy(novadAddress.sun_path, key.c_str(), sizeof(novadAddress.sun_path));
{
Lock buffereventLock(&bufferevent_mutex);
bufferevent = bufferevent_socket_new(libeventBase, -1,
BEV_OPT_CLOSE_ON_FREE | BEV_OPT_THREADSAFE | BEV_OPT_UNLOCK_CALLBACKS | BEV_OPT_DEFER_CALLBACKS );
if(bufferevent == NULL)
{
LOG(ERROR, "Unable to create a socket to Nova", "");
DisconnectFromNovad();
return false;
}
bufferevent_setcb(bufferevent, MessageManager::MessageDispatcher, NULL, MessageManager::ErrorDispatcher, NULL);
if(bufferevent_enable(bufferevent, EV_READ) == -1)
{
LOG(ERROR, "Unable to enable socket events", "");
return false;
}
if(bufferevent_socket_connect(bufferevent, (struct sockaddr *)&novadAddress, sizeof(novadAddress)) == -1)
{
bufferevent = NULL;
LOG(DEBUG, "Unable to connect to NOVAD: "+string(strerror(errno))+".", "");
return false;
}
IPCSocketFD = bufferevent_getfd(bufferevent);
if(IPCSocketFD == -1)
{
LOG(DEBUG, "Unable to connect to Novad: "+string(strerror(errno))+".", "");
bufferevent_free(bufferevent);
bufferevent = NULL;
return false;
}
if(evutil_make_socket_nonblocking(IPCSocketFD) == -1)
{
LOG(DEBUG, "Unable to connect to Novad", "Could not set socket to non-blocking mode");
bufferevent_free(bufferevent);
bufferevent = NULL;
return false;
}
MessageManager::Instance().DeleteEndpoint(IPCSocketFD);
MessageManager::Instance().StartSocket(IPCSocketFD, bufferevent);
}
pthread_create(&eventDispatchThread, NULL, EventDispatcherThread, NULL);
//Test if the connection is up
Ticket ticket = MessageManager::Instance().StartConversation(IPCSocketFD);
RequestMessage connectRequest(REQUEST_PING);
if(!MessageManager::Instance().WriteMessage(ticket, &connectRequest))
{
return false;
}
Message *reply = MessageManager::Instance().ReadMessage(ticket);
if(reply->m_messageType == ERROR_MESSAGE && ((ErrorMessage*)reply)->m_errorType == ERROR_TIMEOUT)
{
LOG(DEBUG, "Timeout error when waiting for message reply", "");
delete reply;
return false;
}
if(reply->m_messageType != REQUEST_MESSAGE)
{
stringstream s;
s << "Expected message type of REQUEST_MESSAGE but got " << reply->m_messageType;
LOG(DEBUG, s.str(), "");
reply->DeleteContents();
delete reply;
return false;
}
RequestMessage *connectionReply = (RequestMessage*)reply;
if(connectionReply->m_contents.m_requesttype() != REQUEST_PONG)
{
stringstream s;
s << "Expected control type of CONTROL_CONNECT_REPLY but got " <<connectionReply->m_contents.m_requesttype();
LOG(DEBUG, s.str(), "");
reply->DeleteContents();
delete reply;
return false;
}
delete connectionReply;
return true;
}
static void
echo_read_cb(struct bufferevent *bev, void *ctx)
{
printf("echo_read_cb ctx:%p\n", ctx);
/* This callback is invoked when there is data to read on bev. */
struct evbuffer *input = bufferevent_get_input(bev);
/* Copy all the data from the input buffer to the output buffer. */
// evbuffer_add_buffer(output, input);
// 能读到数据的时候 去连接其他server 而且是以阻塞的方式
printf("echo_read_cb1 \n");
struct sockaddr_in servaddr;
memset(&servaddr, 0, sizeof(servaddr));
//servaddr.sin_family = AF_INET;
////servaddr.sin_addr.s_addr = htonl(0x7f000001); /* 127.0.0.1 */
//if (inet_aton("192.168.1.104", &servaddr.sin_addr) == 0)
//{
// perror("inet_aton failure!");
// printf("address:%u\n", servaddr.sin_addr.s_addr);
// exit(EXIT_FAILURE);
//}
//servaddr.sin_port = htons(5188); /* Port 9876*/
// TODO 错误判断
char buff[64];
evutil_snprintf(buff, sizeof(buff), "%s:%d", "192.168.1.104", 5188);
int servadd_len = sizeof(servaddr);
//int retx = evutil_parse_sockaddr_port("192.168.1.104:5188", (struct sockaddr*)&servaddr, &servadd_len);
int retx = evutil_parse_sockaddr_port(buff, (struct sockaddr*)&servaddr, &servadd_len);
printf("address:%s\n", buff);
if (retx < 0)
{
printf("address:error\n");
}
else
{
printf("address:%u\n", servaddr.sin_addr.s_addr);
}
int sockconn;
errno = 0;
if ((sockconn = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
{
perror("socket failure");
exit(EXIT_FAILURE);
}
//evutil_make_socket_nonblocking(sockconn);
struct timeval tv;
tv.tv_sec = 5;
tv.tv_usec = 0;
setsockopt(sockconn, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
setsockopt(sockconn, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
// bufferevent_socket_new 只是分配内存 没有系统调用
struct bufferevent *bev1 = bufferevent_socket_new(ctx, sockconn, BEV_OPT_CLOSE_ON_FREE);
//bufferevent_settimeout(bev1, 10, 10);
//bev1 = bufferevent_socket_new(ctx, -1, BEV_OPT_CLOSE_ON_FREE);
bufferevent_enable(bev1, EV_READ|EV_WRITE);
bufferevent_setcb(bev1, NULL, NULL, eventcb, "hello");
//SetSocketBlockingEnabled(sockconn, 1);
// 这里默认是阻塞的，会一直阻塞 直到连接成功 或超时 // //
if (bufferevent_socket_connect(bev1,
(struct sockaddr *)&servaddr, sizeof(servaddr)) < 0) {
/* Error starting connection */
// 连接不能马上建立的时候 应该添加到写事件中
fprintf(stderr, "Connect failed.\n");
perror("connect...........");
//#define ETIMEDOUT 110 /* Connection timed out */
// 无条件超时 非自定义超时 走这里//
//bufferevent_free(bev1);
// 此时错误码是 BEV_EVENT_ERROR 在那里销毁 BEV_EVENT_ERROR
//return -1;
// 110错误码走到这里 11, 115错误码 不会走到这里
}
printf("bufferevent_socket_connect return errno:%d \n", errno);
////#define EAGAIN 11 /* Try again */
////#define ECONNREFUSED 111 /* Connection refused */
////#define EINPROGRESS 115 /* Operation now in progress */ // connect 被超时打断11,
//
//if (errno != EAGAIN )
if (errno == EINPROGRESS) // 自定义 超时中断
{
perror("self timeout.............");
bufferevent_free(bev1);
return;
}
else if (errno != 0)
{
perror("00buffevent_connect");
printf("bufferevent_socket_connect error\n");
//如果 在过程中 超时会被 打断 EINPROGRESS 115 /* Operation now in progress */
// 除了自定义超时timeout不宜在这里销毁 在 回调函数中销毁 不然调用不到回调函数//
//bufferevent_free(bev1);
return ;
}
else
{
// 连接成功
perror("11buffevent_connect");
printf("bufferevent_socket_connect success\n");
}
//if (connect(sockconn, (struct sockaddr*)&servaddr, sizeof(servaddr)) < 0)
//{
// perror("connnect error");
// exit(EXIT_FAILURE);
//}
//else
//{
// printf("connect success\n");
//}
//char recvbuf[1024] = {0};
//memset(recvbuf, 0, sizeof(recvbuf));
//sleep(5);
//read(sockconn, recvbuf, sizeof(recvbuf));
//printf("----%s-----\n", recvbuf);
// struct evbuffer *input1 = bufferevent_get_input(bev1);
// printf("before read ---------\n");
// bufferevent_read_buffer(bev1, input1);
// size_t len = evbuffer_get_length(input1);
// unsigned char * recvbuf = evbuffer_pullup(input1, len);
// printf("end read len:%ld---------\n", len);
// printf("----%s-----\n", recvbuf);
//struct evbuffer * buffer = evbuffer_new();
struct evbuffer *buffer = bufferevent_get_input(bev1);
struct evbuffer *buffero = bufferevent_get_output(bev1);
evutil_socket_t fd = bufferevent_getfd(bev1);
time_t rawtime;
time ( &rawtime );
printf("before read ---------%ld\n", rawtime);
int ret = evbuffer_read(buffer, fd, 1024);
// not work
// bufferevent_read_buffer(bev1, buffer);
size_t len = evbuffer_get_length(buffer);
time ( &rawtime );
printf("end readlen ---------%ld\n", len);
unsigned char * recvbuf = evbuffer_pullup(buffer, len);
printf("end read ---------%ld\n", rawtime);
printf("----%s-----\n", recvbuf);
evbuffer_drain(buffer, len);
// int evbuffer_write(struct evbuffer *buffer, evutil_socket_t fd);
time ( &rawtime );
printf("before write---------%ld\n", rawtime);
sleep(10);
time ( &rawtime );
printf("before write1---------%ld\n", rawtime);
evbuffer_add(buffero, "hello,china", 12);
ret = evbuffer_write(buffero, fd);
// ret =write(fd, "hello,china", 12);
if (ret < 0)
{
if (errno != 0)
{
perror("write ");
}
}
time ( &rawtime );
printf("end write1 ---------%ld\n", rawtime);
// 出现read 在connect 之前//
//root@debian:~/programming/libevent/libevent2/libevent/sample/study-buffevent_block# ./echoserver_block
// create listener success, base:0xfdbc40
// echo_read_cb ctx:0xfdbc40
// echo_read_cb1
// bufferevent_socket_connect return errno:11
// 11buffevent_connect: Resource temporarily unavailable
// bufferevent_socket_connect success
// ----hello,world-----
// Connect okay,-------------------------- hello.
// disConnect --------------------------.
}
void TcpTransport::readNextMessageIntCallback(struct bufferevent *bev,
void *ctx) {
/* This callback is invoked when there is data to read on bev. */
// protocol: <length> <header length> <header data> <body data>
// 1 2 3 4
// rocketmq protocol contains 4 parts as following:
// 1¡¢big endian 4 bytes int, its length is sum of 2,3 and 4
// 2¡¢big endian 4 bytes int, its length is 3
// 3¡¢use json to serialization data
// 4¡¢application could self-defination binary data
struct evbuffer *input = bufferevent_get_input(bev);
while (1) {
struct evbuffer_iovec v[4];
int n = evbuffer_peek(input, 4, NULL, v, sizeof(v) / sizeof(v[0]));
int idx = 0;
char hdr[4];
char *p = hdr;
unsigned int needed = 4;
for (idx = 0; idx < n; idx++) {
if (needed) {
unsigned int tmp = needed < v[idx].iov_len ? needed : v[idx].iov_len;
memcpy(p, v[idx].iov_base, tmp);
p += tmp;
needed -= tmp;
} else {
break;
}
}
if (needed) {
LOG_DEBUG(" too little data received with sum = %d ", 4 - needed);
return;
}
uint32 totalLenOfOneMsg =
*(uint32 *)hdr; // first 4 bytes, which indicates 1st part of protocol
uint32 bytesInMessage = ntohl(totalLenOfOneMsg);
LOG_DEBUG("fd:%d, totalLen:" SIZET_FMT ", bytesInMessage:%d",
bufferevent_getfd(bev), v[0].iov_len, bytesInMessage);
uint32 len = evbuffer_get_length(input);
if (len >= bytesInMessage + 4) {
LOG_DEBUG("had received all data with len:%d from fd:%d", len,
bufferevent_getfd(bev));
} else {
LOG_DEBUG(
"didn't received whole bytesInMessage:%d, from fd:%d, totalLen:%d",
bytesInMessage, bufferevent_getfd(bev), len);
return; // consider large data which was not received completely by now
}
if (bytesInMessage > 0) {
MemoryBlock messageData(bytesInMessage, true);
uint32 bytesRead = 0;
char *data = messageData.getData() + bytesRead;
bufferevent_read(bev, data, 4);
bytesRead = bufferevent_read(bev, data, bytesInMessage);
TcpTransport *tcpTrans = (TcpTransport *)ctx;
tcpTrans->messageReceived(messageData);
}
}
}
