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[mod_openssl]: better io event handling (ssl may want to write while lighty only wants to read)

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personal/stbuehler/wip
Stefan Bühler 13 years ago
parent 5e4b27c99b
commit 7fbcfb86d9
4 changed files with 96 additions and 19 deletions
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2
include/lighttpd/connection.h
Unescape Escape View File

@ -80,4 +80,6 @@ LI_API gchar *li_connection_state_str(liConnectionState state);
/* returns NULL if the vrequest doesn't belong to a liConnection* object */
LI_API liConnection* li_connection_from_vrequest(liVRequest *vr);
LI_API void connection_handle_io(liConnection *con);
#endif

2
include/lighttpd/server.h
Unescape Escape View File

@ -15,6 +15,7 @@ typedef gboolean (*liConnectionNewCB)(liConnection *con);
typedef void (*liConnectionCloseCB)(liConnection *con);
typedef liNetworkStatus (*liConnectionWriteCB)(liConnection *con, goffset write_max);
typedef liNetworkStatus (*liConnectionReadCB)(liConnection *con);
typedef void (*liServerSocketUpdateEventsCB)(liConnection *con, int events);
typedef void (*liServerSocketReleaseCB)(liServerSocket *srv_sock);
typedef void (*liServerStateWaitCancelled)(liServer *srv, liServerStateWait *w);
@ -42,6 +43,7 @@ struct liServerSocket {
liConnectionNewCB new_cb;
liConnectionCloseCB close_cb;
liServerSocketReleaseCB release_cb;
liServerSocketUpdateEventsCB update_events_cb;
};
struct liServerStateWait {

49
src/main/connection.c
Unescape Escape View File

@ -8,17 +8,25 @@ static void li_connection_internal_error(liConnection *con);
static void update_io_events(liConnection *con) {
int events = 0;
if (!con->can_read && (con->state != LI_CON_STATE_HANDLE_MAINVR || con->mainvr->state >= LI_VRS_READ_CONTENT) && !con->in->is_closed) {
events = events | EV_READ;
}
if (LI_CON_STATE_KEEP_ALIVE == con->state) {
events = EV_READ;
} else {
if (!con->can_read && (con->state != LI_CON_STATE_HANDLE_MAINVR || con->mainvr->state >= LI_VRS_READ_CONTENT) && !con->in->is_closed) {
events = events | EV_READ;
}
if (!con->can_write && con->raw_out->length > 0) {
if (!con->mainvr->throttled || con->mainvr->throttle.magazine > 0) {
events = events | EV_WRITE;
if (!con->can_write && con->raw_out->length > 0) {
if (!con->mainvr->throttled || con->mainvr->throttle.magazine > 0) {
events = events | EV_WRITE;
}
}
}
li_ev_io_set_events(con->wrk->loop, &con->sock_watcher, events);
if (con->srv_sock->update_events_cb) {
con->srv_sock->update_events_cb(con, events);
} else {
li_ev_io_set_events(con->wrk->loop, &con->sock_watcher, events);
}
}
static void parse_request_body(liConnection *con) {
@ -380,22 +388,28 @@ static gboolean connection_try_write(liConnection *con) {
return TRUE;
}
static void connection_cb(struct ev_loop *loop, ev_io *w, int revents) {
liConnection *con = (liConnection*) w->data;
UNUSED(loop);
void connection_handle_io(liConnection *con) {
/* ensure that the connection is always in the io timeout queue */
if (!con->io_timeout_elem.queued)
li_waitqueue_push(&con->wrk->io_timeout_queue, &con->io_timeout_elem);
if (revents & EV_READ) con->can_read = TRUE;
if (revents & EV_WRITE) con->can_write = TRUE;
if (con->can_read)
if (!connection_try_read(con)) return;
if (con->can_write)
if (!connection_try_write(con)) return;
if (!check_response_done(con)) return;
update_io_events(con);
}
static void connection_cb(struct ev_loop *loop, ev_io *w, int revents) {
liConnection *con = (liConnection*) w->data;
UNUSED(loop);
if (revents & EV_READ) con->can_read = TRUE;
if (revents & EV_WRITE) con->can_write = TRUE;
if (revents & EV_ERROR) {
/* if this happens, we have a serious bug in the event handling */
VR_ERROR(con->mainvr, "%s", "EV_ERROR encountered, dropping connection!");
@ -403,9 +417,7 @@ static void connection_cb(struct ev_loop *loop, ev_io *w, int revents) {
return;
}
if (!check_response_done(con)) return;
update_io_events(con);
connection_handle_io(con);
}
static void connection_keepalive_cb(struct ev_loop *loop, ev_timer *w, int revents) {
@ -577,6 +589,7 @@ void li_connection_reset(liConnection *con) {
}
}
ev_io_set(&con->sock_watcher, -1, 0);
ev_set_cb(&con->sock_watcher, connection_cb);
li_chunkqueue_reset(con->raw_in);
li_chunkqueue_reset(con->raw_out);
@ -665,7 +678,7 @@ static void li_connection_reset_keep_alive(liConnection *con) {
con->response_headers_sent = FALSE;
con->expect_100_cont = FALSE;
li_ev_io_set_events(con->wrk->loop, &con->sock_watcher, EV_READ);
update_io_events(con);
con->info.keep_alive = TRUE;
con->raw_out->is_closed = FALSE;

62
src/modules/mod_openssl.c
Unescape Escape View File

@ -36,12 +36,43 @@ typedef struct openssl_context openssl_context;
struct openssl_connection_ctx {
SSL *ssl;
liConnection *con;
int con_events;
liJob con_handle_events_job;
};
struct openssl_context {
SSL_CTX *ssl_ctx;
};
static void openssl_con_handle_events_cb(liJob *job) {
openssl_connection_ctx *conctx = LI_CONTAINER_OF(job, openssl_connection_ctx, con_handle_events_job);
liConnection *con = conctx->con;
connection_handle_io(con);
}
static void openssl_io_cb(struct ev_loop *loop, ev_io *w, int revents) {
liConnection *con = (liConnection*) w->data;
openssl_connection_ctx *conctx = con->srv_sock_data;
if (revents & EV_ERROR) {
/* if this happens, we have a serious bug in the event handling */
VR_ERROR(con->mainvr, "%s", "EV_ERROR encountered, dropping connection!");
li_connection_error(con);
return;
}
con->can_read = TRUE;
con->can_write = TRUE;
/* disable all events; they will get reactivated later */
li_ev_io_set_events(loop, w, 0);
li_job_now(&con->wrk->jobqueue, &conctx->con_handle_events_job);
}
static gboolean openssl_con_new(liConnection *con) {
liServer *srv = con->srv;
openssl_context *ctx = con->srv_sock->data;
@ -50,6 +81,9 @@ static gboolean openssl_con_new(liConnection *con) {
con->srv_sock_data = NULL;
conctx->ssl = SSL_new(ctx->ssl_ctx);
conctx->con = con;
li_job_init(&conctx->con_handle_events_job, openssl_con_handle_events_cb);
conctx->con_events = 0;
if (NULL == conctx->ssl) {
ERROR(srv, "SSL_new: %s", ERR_error_string(ERR_get_error(), NULL));
@ -66,6 +100,8 @@ static gboolean openssl_con_new(liConnection *con) {
con->srv_sock_data = conctx;
con->info.is_ssl = TRUE;
ev_set_cb(&con->sock_watcher, openssl_io_cb);
return TRUE;
fail:
@ -91,10 +127,22 @@ static void openssl_con_close(liConnection *con) {
con->srv_sock_data = NULL;
con->info.is_ssl = FALSE;
li_job_clear(&conctx->con_handle_events_job);
g_slice_free(openssl_connection_ctx, conctx);
}
static void openssl_update_events(liConnection *con, int events) {
openssl_connection_ctx *conctx = con->srv_sock_data;
/* new events -> add them to socket watcher too */
if (0 != (events & ~conctx->con_events)) {
li_ev_io_add_events(con->wrk->loop, &con->sock_watcher, events);
}
conctx->con_events = events;
}
static liNetworkStatus openssl_con_write(liConnection *con, goffset write_max) {
const ssize_t blocksize = 16*1024; /* 16k */
char *block_data;
@ -134,7 +182,10 @@ static liNetworkStatus openssl_con_write(liConnection *con, goffset write_max) {
switch ((ssl_r = SSL_get_error(conctx->ssl, r))) {
case SSL_ERROR_WANT_READ:
li_ev_io_add_events(con->wrk->loop, &con->sock_watcher, EV_READ);
return LI_NETWORK_STATUS_WAIT_FOR_EVENT;
case SSL_ERROR_WANT_WRITE:
li_ev_io_add_events(con->wrk->loop, &con->sock_watcher, EV_WRITE);
return LI_NETWORK_STATUS_WAIT_FOR_EVENT;
case SSL_ERROR_SYSCALL:
/* perhaps we have error waiting in our error-queue */
@ -242,9 +293,17 @@ static liNetworkStatus openssl_con_read(liConnection *con) {
err = SSL_get_error(conctx->ssl, r);
if (SSL_ERROR_WANT_READ == err || SSL_ERROR_WANT_WRITE == err) {
switch (err) {
case SSL_ERROR_WANT_READ:
li_ev_io_add_events(con->wrk->loop, &con->sock_watcher, EV_READ);
/* ignore requirement that we should pass the same buffer again */
return (len > 0) ? LI_NETWORK_STATUS_SUCCESS : LI_NETWORK_STATUS_WAIT_FOR_EVENT;
case SSL_ERROR_WANT_WRITE:
li_ev_io_add_events(con->wrk->loop, &con->sock_watcher, EV_WRITE);
/* ignore requirement that we should pass the same buffer again */
return (len > 0) ? LI_NETWORK_STATUS_SUCCESS : LI_NETWORK_STATUS_WAIT_FOR_EVENT;
default:
break;
}
switch (err) {
@ -361,6 +420,7 @@ static void openssl_setup_listen_cb(liServer *srv, int fd, gpointer data) {
srv_sock->new_cb = openssl_con_new;
srv_sock->close_cb = openssl_con_close;
srv_sock->release_cb = openssl_sock_release;
srv_sock->update_events_cb = openssl_update_events;
}
static gboolean openssl_setup(liServer *srv, liPlugin* p, liValue *val, gpointer userdata) {

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