diff options
Diffstat (limited to 'lib/udp.c')
| -rw-r--r-- | lib/udp.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/lib/udp.c b/lib/udp.c deleted file mode 100644 index c00f215..0000000 --- a/lib/udp.c +++ /dev/null @@ -1,177 +0,0 @@ -/* Copyright 2011 NORDUnet A/S. All rights reserved. - See LICENSE for licensing information. */ - -#if defined HAVE_CONFIG_H -#include <config.h> -#endif - -#include <assert.h> -#include <sys/types.h> -#include <sys/socket.h> -#include <event2/event.h> -#include <radius/client.h> -#include <radsec/radsec.h> -#include <radsec/radsec-impl.h> -#include "debug.h" -#include "event.h" -#include "compat.h" -#include "udp.h" - -/* Send one packet, the first in queue. */ -static int -_send (struct rs_connection *conn, int fd) -{ - ssize_t r = 0; - struct rs_packet *pkt = conn->out_queue; - - assert (pkt->rpkt); - assert (pkt->rpkt->data); - - /* Send. */ - r = compat_send (fd, pkt->rpkt->data, pkt->rpkt->length, 0); - if (r == -1) - { - int sockerr = evutil_socket_geterror (pkt->conn->fd); - if (sockerr != EAGAIN) - return rs_err_conn_push_fl (pkt->conn, RSE_SOCKERR, __FILE__, __LINE__, - "%d: send: %d (%s)", fd, sockerr, - evutil_socket_error_to_string (sockerr)); - } - - assert (r == pkt->rpkt->length); - /* Unlink the packet. */ - conn->out_queue = pkt->next; - - /* If there are more packets in queue, add the write event again. */ - if (pkt->conn->out_queue) - { - r = event_add (pkt->conn->wev, NULL); - if (r < 0) - return rs_err_conn_push_fl (pkt->conn, RSE_EVENT, __FILE__, __LINE__, - "event_add: %s", evutil_gai_strerror (r)); - rs_debug (("%s: re-adding the write event\n", __func__)); - } - - return RSE_OK; -} - -/* Callback for conn->wev and conn->rev. FIXME: Rename. - - USER_DATA contains connection for EV_READ and a packet for - EV_WRITE. This is because we don't have a connect/establish entry - point at the user level -- send implies connect so when we're - connected we need the packet to send. */ -static void -_evcb (evutil_socket_t fd, short what, void *user_data) -{ - int err; - struct rs_packet *pkt = (struct rs_packet *) user_data; - - rs_debug (("%s: fd=%d what =", __func__, fd)); - if (what & EV_TIMEOUT) rs_debug ((" TIMEOUT -- shouldn't happen!")); - if (what & EV_READ) rs_debug ((" READ")); - if (what & EV_WRITE) rs_debug ((" WRITE")); - rs_debug (("\n")); - - assert (pkt); - assert (pkt->conn); - if (what & EV_READ) - { - /* Read a single UDP packet and stick it in USER_DATA. */ - /* TODO: Verify that unsolicited packets are dropped. */ - ssize_t r = 0; - - assert (pkt->rpkt->data); - - r = compat_recv (fd, pkt->rpkt->data, RS_MAX_PACKET_LEN, MSG_TRUNC); - if (r == -1) - { - int sockerr = evutil_socket_geterror (pkt->conn->fd); - if (sockerr == EAGAIN) - { - /* FIXME: Really shouldn't happen since we've been told - that fd is readable! */ - rs_debug (("%s: EAGAIN reading UDP packet -- wot?\n")); - goto err_out; - } - - /* Hard error. */ - rs_err_conn_push_fl (pkt->conn, RSE_SOCKERR, __FILE__, __LINE__, - "%d: recv: %d (%s)", fd, sockerr, - evutil_socket_error_to_string (sockerr)); - event_del (pkt->conn->tev); - goto err_out; - } - event_del (pkt->conn->tev); - if (r < 20 || r > RS_MAX_PACKET_LEN) /* Short or long packet. */ - { - rs_err_conn_push (pkt->conn, RSE_INVALID_PKT, - "invalid packet length: %d", r); - goto err_out; - } - pkt->rpkt->length = (pkt->rpkt->data[2] << 8) + pkt->rpkt->data[3]; - err = nr_packet_ok (pkt->rpkt); - if (err) - { - rs_err_conn_push_fl (pkt->conn, -err, __FILE__, __LINE__, - "invalid packet"); - goto err_out; - } - /* Hand over message to user. This changes ownership of pkt. - Don't touch it afterwards -- it might have been freed. */ - if (pkt->conn->callbacks.received_cb) - pkt->conn->callbacks.received_cb (pkt, pkt->conn->user_data); - else - rs_debug (("%s: no received-callback -- dropping packet\n", __func__)); - } - else if (what & EV_WRITE) - { - if (!pkt->conn->is_connected) - event_on_connect (pkt->conn, pkt); - - if (pkt->conn->out_queue) - if (_send (pkt->conn, fd) == RSE_OK) - if (pkt->conn->callbacks.sent_cb) - pkt->conn->callbacks.sent_cb (pkt->conn->user_data); - } - return; - - err_out: - rs_conn_disconnect (pkt->conn); -} - -int -udp_init (struct rs_connection *conn, struct rs_packet *pkt) -{ - assert (!conn->bev); - - conn->rev = event_new (conn->evb, conn->fd, EV_READ|EV_PERSIST, _evcb, NULL); - conn->wev = event_new (conn->evb, conn->fd, EV_WRITE, _evcb, NULL); - if (!conn->rev || !conn->wev) - { - if (conn->rev) - { - event_free (conn->rev); - conn->rev = NULL; - } - /* ENOMEM _or_ EINVAL but EINVAL only if we use EV_SIGNAL, at - least for now (libevent-2.0.5). */ - return rs_err_conn_push_fl (conn, RSE_NOMEM, __FILE__, __LINE__, NULL); - } - return RSE_OK; -} - -int -udp_init_retransmit_timer (struct rs_connection *conn) -{ - assert (conn); - - if (conn->tev) - event_free (conn->tev); - conn->tev = evtimer_new (conn->evb, event_retransmit_timeout_cb, conn); - if (!conn->tev) - return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__, - "evtimer_new"); - - return RSE_OK; -} |