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Fix some nasty bugs related to read/write events and timeout events. 

This would have caused users not being able to log in, and in some cases
100% cpu usage.
This commit is contained in:
Jan Vidar Krey 2009-07-19 02:12:50 +02:00
parent abd097acf0
commit 4a173bf066
6 changed files with 51 additions and 76 deletions
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15
src/hub.c
View File

@ -102,7 +102,6 @@ int hub_handle_support(struct hub_info* hub, struct user* u, struct adc_message*
int index = 0;
int ok = 1;
char* arg = adc_msg_get_argument(cmd, index);
struct timeval timeout = { TIMEOUT_HANDSHAKE, 0 };
if (hub->status == hub_status_disabled && u->state == state_protocol)
{
@ -146,8 +145,7 @@ int hub_handle_support(struct hub_info* hub, struct user* u, struct adc_message*
if (ok)
{
hub_send_handshake(hub, u);
if (u->net.ev_read)
event_add(u->net.ev_read, &timeout);
user_set_timeout(u, TIMEOUT_HANDSHAKE);
}
else
{
@ -929,17 +927,8 @@ void hub_disconnect_user(struct hub_info* hub, struct user* user, int reason)
{
return;
}
/* dont read more data from this user */
/* FIXME: Remove this from here! */
if (user->net.ev_read)
{
event_del(user->net.ev_read);
hub_free(user->net.ev_read);
user->net.ev_read = 0;
}
/* this should be enough? */
/* stop reading from user */
net_shutdown_r(user->net.sd);
hub_log(log_trace, "hub_disconnect_user(), user=%p, reason=%d, state=%d", user, reason, user->state);

5
src/hubevent.c
View File

@ -49,8 +49,6 @@ static void log_user_nick_change(struct user* u, const char* nick)
/* Send MOTD, do logging etc */
void on_login_success(struct hub_info* hub, struct user* u)
{
struct timeval timeout = { TIMEOUT_IDLE, 0 };
/* Send user list of all existing users */
if (!uman_send_user_list(hub, u))
return;
@ -71,8 +69,7 @@ void on_login_success(struct hub_info* hub, struct user* u)
hub_send_motd(hub, u);
/* reset to idle timeout */
if (u->net.ev_read)
event_add(u->net.ev_read, &timeout);
user_set_timeout(u, TIMEOUT_IDLE);
}
void on_login_failure(struct hub_info* hub, struct user* u, enum status_message msg)

38
src/netevent.c
View File

@ -212,7 +212,7 @@ int handle_net_read(struct user* user)
int handle_net_write(struct user* user)
{
for (;;)
while (hub_sendq_get_bytes(user->net.send_queue))
{
int ret = hub_sendq_send(user->net.send_queue, net_user_send, user);
if (ret <= 0)
@ -223,6 +223,10 @@ int handle_net_write(struct user* user)
{
user_net_io_want_write(user);
}
else
{
user_net_io_want_read(user);
}
return 0;
}
@ -235,7 +239,7 @@ void net_event(int fd, short ev, void *arg)
hub_log(log_trace, "net_on_read() : fd=%d, ev=%d, arg=%p", fd, (int) ev, arg);
#endif
if (ev == EV_TIMEOUT)
if (ev & EV_TIMEOUT)
{
if (user_is_connecting(user))
{
@ -247,44 +251,28 @@ void net_event(int fd, short ev, void *arg)
// hub_send_ping(hub, user);
}
}
else if (ev == EV_READ)
if (ev & EV_READ)
{
flag_close = handle_net_read(user);
}
else if (ev == EV_WRITE)
if (ev & EV_WRITE)
{
flag_close = handle_net_write(user);
}
if (flag_close)
{
hub_disconnect_user(g_hub, user, flag_close);
return;
}
if (user_is_logged_in(user))
{
if (user->net.ev_read)
{
struct timeval timeout = { TIMEOUT_IDLE, 0 };
event_add(user->net.ev_read, &timeout);
}
}
else if (user_is_connecting(user))
{
if (user->net.ev_read)
{
struct timeval timeout = { TIMEOUT_HANDSHAKE, 0 };
event_add(user->net.ev_read, &timeout);
}
}
}
static void prepare_user_net(struct hub_info* hub, struct user* user)
{
int fd = user->net.sd;
struct timeval timeout = { TIMEOUT_CONNECTED, 0 };
#ifdef SET_SENDBUG
size_t sendbuf = 0;
@ -305,10 +293,6 @@ static void prepare_user_net(struct hub_info* hub, struct user* user)
net_set_nonblocking(fd, 1);
net_set_nosigpipe(fd, 1);
event_set(user->net.ev_read, fd, EV_READ | EV_PERSIST, net_event, user);
event_base_set(hub->evbase, user->net.ev_read);
event_add(user->net.ev_read, &timeout);
}
void net_on_accept(int server_fd, short ev, void *arg)

4
src/route.c
View File

@ -18,7 +18,6 @@
*/
#include "uhub.h"
#define DEBUG_SENDQ 1
int route_message(struct hub_info* hub, struct user* u, struct adc_message* msg)
{
@ -110,8 +109,7 @@ int route_to_user(struct hub_info* hub, struct user* user, struct adc_message* m
/* Perform oportunistic write */
handle_net_write(user);
}
if (hub_sendq_get_bytes(user->net.send_queue))
else
{
user_net_io_want_write(user);
}

54
src/user.c
View File

@ -46,20 +46,21 @@ struct user* user_create(struct hub_info* hub, int sd)
if (user == NULL)
return NULL; /* OOM */
user->net.ev_read = hub_malloc_zero(sizeof(struct event));
if (!user->net.ev_read)
{
hub_free(user->net.ev_read);
hub_free(user);
return NULL;
}
user->net.sd = sd;
user->net.tm_connected = time(NULL);
user->net.send_queue = hub_sendq_create();
user->net.recv_queue = hub_recvq_create();
event_set(&user->net.event, sd, EV_READ | EV_PERSIST, net_event, user);
event_base_set(hub->evbase, &user->net.event);
event_add(&user->net.event, 0);
evtimer_set(&user->net.timeout, net_event, user);
event_base_set(hub->evbase, &user->net.timeout);
user_set_timeout(user, TIMEOUT_CONNECTED);
user_set_state(user, state_protocol);
return user;
}
@ -69,12 +70,7 @@ void user_destroy(struct user* user)
{
hub_log(log_trace, "user_destroy(), user=%p", user);
if (user->net.ev_read)
{
event_del(user->net.ev_read);
hub_free(user->net.ev_read);
user->net.ev_read = 0;
}
event_del(&user->net.event);
hub_recvq_destroy(user->net.recv_queue);
hub_sendq_destroy(user->net.send_queue);
@ -335,24 +331,19 @@ void user_net_io_want_write(struct user* user)
#ifdef DEBUG_SENDQ
hub_log(log_trace, "user_net_io_want_write: %s", user_log_str(user));
#endif
if (user && user->net.ev_read)
{
event_set(user->net.ev_read, user->net.sd, EV_READ | EV_WRITE | EV_PERSIST, net_event, user);
event_add(user->net.ev_read, 0);
}
event_del(&user->net.event);
event_set(&user->net.event, user->net.sd, EV_READ | EV_WRITE | EV_PERSIST, net_event, user);
event_add(&user->net.event, 0);
}
void user_net_io_want_read(struct user* user, int timeout_s)
void user_net_io_want_read(struct user* user)
{
#ifdef DEBUG_SENDQ
hub_log(log_trace, "user_net_io_want_read: %s", user_log_str(user));
#endif
struct timeval timeout = { timeout_s, 0 };
if (user && user->net.ev_read)
{
event_set(user->net.ev_read, user->net.sd, EV_READ | EV_PERSIST, net_event, user);
event_add(user->net.ev_read, &timeout);
}
event_del(&user->net.event);
event_set(&user->net.event, user->net.sd, EV_READ | EV_PERSIST, net_event, user);
event_add(&user->net.event, 0);
}
void user_reset_last_write(struct user* user)
@ -365,4 +356,13 @@ void user_reset_last_read(struct user* user)
user->net.tm_last_read = time(NULL);
}
void user_set_timeout(struct user* user, int seconds)
{
#ifdef DEBUG_SENDQ
hub_log(log_trace, "user_set_timeout to %d seconds: %s", seconds, user_log_str(user));
#endif
struct timeval timeout = { seconds, 0 };
evtimer_add(&user->net.timeout, &timeout);
}

11
src/user.h
View File

@ -95,7 +95,8 @@ struct user_limits
struct user_net_io
{
int sd; /** socket descriptor */
struct event* ev_read; /** libevent struct for read events */
struct event event; /** libevent struct for read/write events */
struct event timeout; /** timeout handling */
struct hub_recvq* recv_queue;
struct hub_sendq* send_queue;
@ -286,7 +287,13 @@ extern void user_net_io_want_write(struct user* user);
/**
* Mark the user with a want read flag, meaning it should poll for readability.
*/
extern void user_net_io_want_read(struct user* user, int timeout_s);
extern void user_net_io_want_read(struct user* user);
/**
* Set timeout for connetion.
* @param seconds the number of seconds into the future.
*/
extern void user_set_timeout(struct user* user, int seconds);
/**
* Reset the last-write timer.