diff options
Diffstat (limited to 'lib/event.c')
| -rw-r--r-- | lib/event.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/lib/event.c b/lib/event.c new file mode 100644 index 0000000..5afba98 --- /dev/null +++ b/lib/event.c @@ -0,0 +1,255 @@ +/* Copyright 2011 NORDUnet A/S. All rights reserved. + See the file COPYING for licensing information. */ + +#if defined HAVE_CONFIG_H +#include <config.h> +#endif + +#include <assert.h> +#include <event2/event.h> +#include <event2/bufferevent.h> +#if defined (RS_ENABLE_TLS) +#include <event2/bufferevent_ssl.h> +#include <openssl/err.h> +#endif +#include <radsec/radsec.h> +#include <radsec/radsec-impl.h> +#include "tcp.h" +#include "udp.h" +#if defined (RS_ENABLE_TLS) +#include "tls.h" +#endif +#include "event.h" +#include "packet.h" +#include "conn.h" +#include "debug.h" + +static void +_evlog_cb (int severity, const char *msg) +{ + const char *sevstr; + switch (severity) + { + case _EVENT_LOG_DEBUG: +#if !defined (DEBUG_LEVENT) + return; +#endif + sevstr = "debug"; + break; + case _EVENT_LOG_MSG: + sevstr = "msg"; + break; + case _EVENT_LOG_WARN: + sevstr = "warn"; + break; + case _EVENT_LOG_ERR: + sevstr = "err"; + break; + default: + sevstr = "???"; + break; + } + fprintf (stderr, "libevent: [%s] %s\n", sevstr, msg); /* FIXME: stderr? */ +} + +void +event_conn_timeout_cb (int fd, short event, void *data) +{ + struct rs_connection *conn = NULL; + + assert (data); + conn = (struct rs_connection *) data; + + if (event & EV_TIMEOUT) + { + rs_debug (("%s: connection timeout on %p (fd %d) connecting to %p\n", + __func__, conn, conn->fd, conn->active_peer)); + conn->is_connecting = 0; + rs_err_conn_push_fl (conn, RSE_TIMEOUT_CONN, __FILE__, __LINE__, NULL); + event_loopbreak (conn); + } +} + +void +event_retransmit_timeout_cb (int fd, short event, void *data) +{ + struct rs_connection *conn = NULL; + + assert (data); + conn = (struct rs_connection *) data; + + if (event & EV_TIMEOUT) + { + rs_debug (("%s: retransmission timeout on %p (fd %d) sending to %p\n", + __func__, conn, conn->fd, conn->active_peer)); + rs_err_conn_push_fl (conn, RSE_TIMEOUT_IO, __FILE__, __LINE__, NULL); + event_loopbreak (conn); + } +} + +int +event_init_socket (struct rs_connection *conn, struct rs_peer *p) +{ + if (conn->fd != -1) + return RSE_OK; + + assert (p->addr); + conn->fd = socket (p->addr->ai_family, p->addr->ai_socktype, + p->addr->ai_protocol); + if (conn->fd < 0) + return rs_err_conn_push_fl (conn, RSE_SOCKERR, __FILE__, __LINE__, + "socket: %d (%s)", + errno, strerror (errno)); + if (evutil_make_socket_nonblocking (conn->fd) < 0) + { + evutil_closesocket (conn->fd); + conn->fd = -1; + return rs_err_conn_push_fl (conn, RSE_SOCKERR, __FILE__, __LINE__, + "evutil_make_socket_nonblocking: %d (%s)", + errno, strerror (errno)); + } + return RSE_OK; +} + +int +event_init_bufferevent (struct rs_connection *conn, struct rs_peer *peer) +{ + if (conn->bev) + return RSE_OK; + + if (conn->realm->type == RS_CONN_TYPE_TCP) + { + conn->bev = bufferevent_socket_new (conn->evb, conn->fd, 0); + if (!conn->bev) + return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__, + "bufferevent_socket_new"); + } +#if defined (RS_ENABLE_TLS) + else if (conn->realm->type == RS_CONN_TYPE_TLS) + { + if (rs_tls_init (conn)) + return -1; + /* Would be convenient to pass BEV_OPT_CLOSE_ON_FREE but things + seem to break when be_openssl_ctrl() (in libevent) calls + SSL_set_bio() after BIO_new_socket() with flag=1. */ + conn->bev = + bufferevent_openssl_socket_new (conn->evb, conn->fd, conn->tls_ssl, + BUFFEREVENT_SSL_CONNECTING, 0); + if (!conn->bev) + return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__, + "bufferevent_openssl_socket_new"); + } +#endif /* RS_ENABLE_TLS */ + else + { + return rs_err_conn_push_fl (conn, RSE_INTERNAL, __FILE__, __LINE__, + "%s: unknown connection type: %d", __func__, + conn->realm->type); + } + + return RSE_OK; +} + +void +event_do_connect (struct rs_connection *conn) +{ + struct rs_peer *p; + int err, sockerr; + + assert (conn); + assert (conn->active_peer); + p = conn->active_peer; + +#if defined (DEBUG) + { + char host[80], serv[80]; + + getnameinfo (p->addr->ai_addr, + p->addr->ai_addrlen, + host, sizeof(host), serv, sizeof(serv), + 0 /* NI_NUMERICHOST|NI_NUMERICSERV*/); + rs_debug (("%s: connecting to %s:%s\n", __func__, host, serv)); + } +#endif + + if (p->conn->bev) /* TCP */ + { + conn_activate_timeout (conn); /* Connect timeout. */ + err = bufferevent_socket_connect (p->conn->bev, p->addr->ai_addr, + p->addr->ai_addrlen); + if (err < 0) + rs_err_conn_push_fl (p->conn, RSE_EVENT, __FILE__, __LINE__, + "bufferevent_socket_connect: %s", + evutil_gai_strerror (err)); + else + p->conn->is_connecting = 1; + } + else /* UDP */ + { + err = connect (p->conn->fd, p->addr->ai_addr, p->addr->ai_addrlen); + if (err < 0) + { + sockerr = evutil_socket_geterror (p->conn->fd); + rs_debug (("%s: %d: connect: %d (%s)\n", __func__, p->conn->fd, + sockerr, evutil_socket_error_to_string (sockerr))); + rs_err_conn_push_fl (p->conn, RSE_SOCKERR, __FILE__, __LINE__, + "%d: connect: %d (%s)", p->conn->fd, sockerr, + evutil_socket_error_to_string (sockerr)); + } + } +} + +int +event_loopbreak (struct rs_connection *conn) +{ + int err = event_base_loopbreak (conn->evb); + if (err < 0) + rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__, + "event_base_loopbreak: %s", + evutil_gai_strerror (err)); + return err; +} + + +void +event_on_disconnect (struct rs_connection *conn) +{ + conn->is_connecting = 0; + conn->is_connected = 0; + rs_debug (("%s: %p disconnected\n", __func__, conn->active_peer)); + if (conn->callbacks.disconnected_cb) + conn->callbacks.disconnected_cb (conn->user_data); +} + +void +event_on_connect (struct rs_connection *conn, struct rs_packet *pkt) +{ + assert (!conn->is_connecting); + conn->is_connected = 1; + rs_debug (("%s: %p connected\n", __func__, conn->active_peer)); + + if (conn->callbacks.connected_cb) + conn->callbacks.connected_cb (conn->user_data); + + if (pkt) + packet_do_send (pkt); +} + +int +event_init_eventbase (struct rs_connection *conn) +{ + assert (conn); + if (conn->evb) + return RSE_OK; + +#if defined (DEBUG) + event_enable_debug_mode (); +#endif + event_set_log_callback (_evlog_cb); + conn->evb = event_base_new (); + if (!conn->evb) + return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__, + "event_base_new"); + + return RSE_OK; +} |