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Annotation of embedaddon/mtr/packet/probe_unix.h, revision 1.1.1.1

1.1       misho       1: /*
                      2:     mtr  --  a network diagnostic tool
                      3:     Copyright (C) 2016  Matt Kimball
                      4: 
                      5:     This program is free software; you can redistribute it and/or modify
                      6:     it under the terms of the GNU General Public License version 2 as
                      7:     published by the Free Software Foundation.
                      8: 
                      9:     This program is distributed in the hope that it will be useful,
                     10:     but WITHOUT ANY WARRANTY; without even the implied warranty of
                     11:     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     12:     GNU General Public License for more details.
                     13: 
                     14:     You should have received a copy of the GNU General Public License
                     15:     along with this program; if not, write to the Free Software
                     16:     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
                     17: */
                     18: 
                     19: #ifndef PROBE_UNIX_H
                     20: #define PROBE_UNIX_H
                     21: 
                     22: /*  The range of local port numbers to use for probes  */
                     23: #define MIN_PORT 33000
                     24: #define MAX_PORT 65535
                     25: 
                     26: /*  We need to track the transmission and timeouts on Unix systems  */
                     27: struct probe_platform_t {
                     28:     /*  The socket for the outgoing connection  (used by TCP probes)  */
                     29:     int socket;
                     30: 
                     31:     /*  The time at which the probe is considered lost  */
                     32:     struct timeval timeout_time;
                     33: 
                     34:     /*  The time at which the probe was sent  */
                     35:     struct timeval departure_time;
                     36: };
                     37: 
                     38: /*  We'll use rack sockets to send and recieve probes on Unix systems  */
                     39: struct net_state_platform_t {
                     40:     /*  true if we were successful at opening IPv4 sockets  */
                     41:     bool ip4_present;
                     42: 
                     43:     /*  true if we were successful at opening IPv6 sockets  */
                     44:     bool ip6_present;
                     45: 
                     46:     /*  Socket used to send raw IPv4 packets  */
                     47:     int ip4_send_socket;
                     48: 
                     49:     /*  Socket used to receive IPv4 ICMP replies  */
                     50:     int ip4_recv_socket;
                     51: 
                     52:     /*  Send socket for ICMPv6 packets  */
                     53:     int icmp6_send_socket;
                     54: 
                     55:     /*  Send socket for UDPv6 packets  */
                     56:     int udp6_send_socket;
                     57: 
                     58:     /*  Receive socket for IPv6 packets  */
                     59:     int ip6_recv_socket;
                     60: 
                     61:     /*
                     62:        true if we should encode the IP header length in host order.
                     63:        (as opposed to network order)
                     64:      */
                     65:     bool ip_length_host_order;
                     66: 
                     67:     /*  true if the operating system supports SCTP sockets  */
                     68:     bool sctp_support;
                     69: 
                     70:     /*  The next port number to use when creating a new probe  */
                     71:     int next_sequence;
                     72: };
                     73: 
                     74: struct net_state_t;
                     75: struct probe_t;
                     76: struct mpls_label_t;
                     77: 
                     78: void set_socket_nonblocking(
                     79:     int socket);
                     80: 
                     81: void receive_probe(
                     82:     struct net_state_t *net_state,
                     83:     struct probe_t *probe,
                     84:     int icmp_type,
                     85:     const struct sockaddr_storage *remote_addr,
                     86:     struct timeval *timestamp,
                     87:     int mpls_count,
                     88:     struct mpls_label_t *mpls);
                     89: 
                     90: int gather_probe_sockets(
                     91:     const struct net_state_t *net_state,
                     92:     fd_set * write_set);
                     93: 
                     94: #endif