1# $OpenBSD: Client.pm,v 1.16 2021/12/22 15:14:13 bluhm Exp $ 2 3# Copyright (c) 2010-2021 Alexander Bluhm <bluhm@openbsd.org> 4# 5# Permission to use, copy, modify, and distribute this software for any 6# purpose with or without fee is hereby granted, provided that the above 7# copyright notice and this permission notice appear in all copies. 8# 9# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 17use strict; 18use warnings; 19 20package Client; 21use parent 'Proc'; 22use Carp; 23use Socket; 24use Socket6; 25use IO::Socket; 26use IO::Socket::SSL; 27use Sys::Syslog qw(:standard :extended :macros); 28 29sub new { 30 my $class = shift; 31 my %args = @_; 32 $args{ktracepid} = "ktrace" if $args{ktrace}; 33 $args{ktracepid} = $ENV{KTRACE} if $ENV{KTRACE}; 34 $args{ktracefile} ||= "client.ktrace"; 35 $args{logfile} ||= "client.log"; 36 $args{up} ||= "Openlog"; 37 my $self = Proc::new($class, %args); 38 if (defined($self->{connectdomain})) { 39 $self->{connectproto} ||= "udp"; 40 } 41 return $self; 42} 43 44sub child { 45 my $self = shift; 46 47 if ($self->{early}) { 48 my @sudo = $ENV{SUDO} ? $ENV{SUDO} : "env"; 49 my @flush = (@sudo, "./logflush"); 50 system(@flush); 51 } 52 53 # TLS 1.3 writes multiple messages without acknowledgement. 54 # If the other side closes early, we want broken pipe error. 55 $SIG{PIPE} = 'IGNORE' if defined($self->{connectdomain}) && 56 $self->{connectproto} eq "tls"; 57 58 if (defined($self->{connectdomain}) && 59 $self->{connectdomain} ne "sendsyslog") { 60 my $cs; 61 if ($self->{connectdomain} == AF_UNIX) { 62 $cs = IO::Socket::UNIX->new( 63 Type => SOCK_DGRAM, 64 Peer => $self->{connectpath} || "/dev/log", 65 ) or die ref($self), " socket unix failed: $!"; 66 $cs->setsockopt(SOL_SOCKET, SO_SNDBUF, 10000) 67 or die ref($self), " setsockopt failed: $!"; 68 } else { 69 $SSL_ERROR = ""; 70 my $iosocket = $self->{connectproto} eq "tls" ? 71 "IO::Socket::SSL" : "IO::Socket::IP"; 72 my $proto = $self->{connectproto}; 73 $proto = "tcp" if $proto eq "tls"; 74 $cs = $iosocket->new( 75 Proto => $proto, 76 Domain => $self->{connectdomain}, 77 PeerAddr => $self->{connectaddr}, 78 PeerPort => $self->{connectport}, 79 $self->{sslcert} ? 80 (SSL_cert_file => $self->{sslcert}) : (), 81 $self->{sslkey} ? 82 (SSL_key_file => $self->{sslkey}) : (), 83 $self->{sslca} ? 84 (SSL_ca_file => $self->{sslca}) : (), 85 SSL_verify_mode => ($self->{sslca} ? 86 SSL_VERIFY_PEER : SSL_VERIFY_NONE), 87 $self->{sslversion} ? 88 (SSL_version => $self->{sslversion}) : (), 89 $self->{sslciphers} ? 90 (SSL_cipher_list => $self->{sslciphers}) : (), 91 ) or die ref($self), " $iosocket socket connect ". 92 "failed: $!,$SSL_ERROR"; 93 if ($self->{sndbuf}) { 94 setsockopt($cs, SOL_SOCKET, SO_SNDBUF, 95 pack('i', $self->{sndbuf})) or die 96 ref($self), " set SO_SNDBUF failed: $!"; 97 } 98 if ($self->{rcvbuf}) { 99 setsockopt($cs, SOL_SOCKET, SO_RCVBUF, 100 pack('i', $self->{rcvbuf})) or die 101 ref($self), " set SO_RCVBUF failed: $!"; 102 } 103 print STDERR "connect sock: ",$cs->sockhost()," ", 104 $cs->sockport(),"\n"; 105 print STDERR "connect peer: ",$cs->peerhost()," ", 106 $cs->peerport(),"\n"; 107 if ($self->{connectproto} eq "tls") { 108 print STDERR "ssl version: ", 109 $cs->get_sslversion(),"\n"; 110 print STDERR "ssl cipher: ", 111 $cs->get_cipher(),"\n"; 112 print STDERR "ssl issuer: ", 113 $cs->peer_certificate('issuer'),"\n"; 114 print STDERR "ssl subject: ", 115 $cs->peer_certificate('subject'),"\n"; 116 print STDERR "ssl cn: ", 117 $cs->peer_certificate('cn'),"\n"; 118 } 119 } 120 121 IO::Handle::flush(\*STDOUT); 122 *STDIN = *STDOUT = $self->{cs} = $cs; 123 select(STDOUT); 124 } 125 126 if ($self->{logsock}) { 127 setlogsock($self->{logsock}) 128 or die ref($self), " setlogsock failed: $!"; 129 } 130 # we take LOG_UUCP as it is not used nowadays 131 openlog("syslogd-regress", "perror,pid", LOG_UUCP); 132} 133 1341; 135