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/*
mtr -- a network diagnostic tool
Copyright (C) 2016 Matt Kimball
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 as
published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef PROBE_UNIX_H
#define PROBE_UNIX_H
#ifndef IPPROTO_SCTP
// Needed for Netbsd.
#define IPPROTO_SCTP 132 /* SCTP */
#endif
/* The range of local port numbers to use for probes */
#define MIN_PORT 33000
#define MAX_PORT 65535
/* We need to track the transmission and timeouts on Unix systems */
struct probe_platform_t {
/* The socket for the outgoing connection (used by TCP probes) */
int socket;
/* The time at which the probe is considered lost */
struct timeval timeout_time;
/* The time at which the probe was sent */
struct timeval departure_time;
};
/* We'll use rack sockets to send and receive probes on Unix systems */
struct net_state_platform_t {
/* true if we were successful at opening IPv4 sockets */
bool ip4_present;
/* true if we were successful at opening IPv6 sockets */
bool ip6_present;
/* true if ipv4 socket is raw socket */
bool ip4_socket_raw;
/* true if ipv6 socket is raw socket */
bool ip6_socket_raw;
/* Socket used to send raw IPv4 packets */
int ip4_send_socket;
/* Socket used to receive IPv4 ICMP replies */
int ip4_recv_socket;
/* Socket used to probe byte order */
int ip4_tmp_icmp_socket;
/* Socket used to tx & rx non-raw IPv4 icmp packets */
int ip4_txrx_icmp_socket;
/* Socket used to send IPv4 udp packets and receive icmp err packets */
int ip4_txrx_udp_socket;
/* Send socket for ICMPv6 packets */
int icmp6_send_socket;
/* Send socket for UDPv6 packets */
int udp6_send_socket;
/* Receive socket for IPv6 packets */
int ip6_recv_socket;
/* Socket used to tx & rx non-raw IPv6 icmp packets */
int ip6_txrx_icmp_socket;
/* Socket used to send IPv6 udp packets and receive icmp err packets */
int ip6_txrx_udp_socket;
/*
true if we should encode the IP header length in host order.
(as opposed to network order)
*/
bool ip_length_host_order;
/* true if the operating system supports SCTP sockets */
bool sctp_support;
/* The next port number to use when creating a new probe */
int next_sequence;
};
struct net_state_t;
struct probe_t;
struct mpls_label_t;
void set_socket_nonblocking(
int socket);
void receive_probe(
struct net_state_t *net_state,
struct probe_t *probe,
int icmp_type,
const struct sockaddr_storage *remote_addr,
struct timeval *timestamp,
int mpls_count,
struct mpls_label_t *mpls);
int gather_probe_sockets(
const struct net_state_t *net_state,
fd_set * write_set);
#endif
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