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socat
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typos in docu and source

This commit is contained in:
Gerhard Rieger 2011-11-26 14:49:51 +01:00
parent 7e3386f228
commit 490a01d245
6 changed files with 17 additions and 14 deletions
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5
CHANGES
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@ -97,6 +97,11 @@ new features:
feature of newer OpenSSL versions. Thanks to Michael Hanselmann for
providing this contribution (sponsored by Google Inc.)
docu:
minor corrections in docu (thanks to Paggas)
client process -> child process
####################### V 1.7.1.3:
security:

16
doc/socat.yo
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@ -333,7 +333,7 @@ label(ADDRESS_GOPEN)dit(bf(tt(GOPEN:<filename>)))
link(UNIX-CONNECT)(ADDRESS_UNIX_CONNECT)
label(ADDRESS_IP_SENDTO)dit(bf(tt(IP-SENDTO:<host>:<protocol>)))
Opens a raw IP socket. Depending on host specification or option link(pf)(OPTION_PROTOCOL_FAMILY), IP procotol version
Opens a raw IP socket. Depending on host specification or option link(pf)(OPTION_PROTOCOL_FAMILY), IP protocol version
4 or 6 is used. It uses link(<protocol>)(TYPE_PROTOCOL) to send packets
to <host> [link(IP address)(TYPE_IP_ADDRESS)] and receives packets from
host, ignores packets from other hosts.
@ -404,7 +404,7 @@ label(ADDRESS_IP6_DATAGRAM)dit(bf(tt(IP6-DATAGRAM:<host>:<protocol>)))
Option groups: link(FD)(GROUP_FD),link(SOCKET)(GROUP_SOCKET),link(IP6)(GROUP_IP6),link(RANGE)(GROUP_RANGE) nl()
label(ADDRESS_IP_RECVFROM)dit(bf(tt(IP-RECVFROM:<protocol>)))
Opens a raw IP socket of link(<protocol>)(TYPE_PROTOCOL). Depending on option link(pf)(OPTION_PROTOCOL_FAMILY), IP procotol version
Opens a raw IP socket of link(<protocol>)(TYPE_PROTOCOL). Depending on option link(pf)(OPTION_PROTOCOL_FAMILY), IP protocol version
4 or 6 is used. It receives one packet from an unspecified peer and may send one or more answer packets to that peer.
This mode is particularly useful with fork option where each arriving packet - from arbitrary peers - is handled by its own sub process.
This allows a behaviour similar to typical UDP based servers like ntpd or
@ -437,7 +437,7 @@ label(ADDRESS_IP6_RECVFROM)dit(bf(tt(IP6-RECVFROM:<protocol>)))
Option groups: link(FD)(GROUP_FD),link(SOCKET)(GROUP_SOCKET),link(IP6)(GROUP_IP6),link(CHILD)(GROUP_CHILD),link(RANGE)(GROUP_RANGE) nl()
label(ADDRESS_IP_RECV)dit(bf(tt(IP-RECV:<protocol>)))
Opens a raw IP socket of link(<protocol>)(TYPE_PROTOCOL). Depending on option link(pf)(OPTION_PROTOCOL_FAMILY), IP procotol version
Opens a raw IP socket of link(<protocol>)(TYPE_PROTOCOL). Depending on option link(pf)(OPTION_PROTOCOL_FAMILY), IP protocol version
4 or 6 is used. It receives packets from multiple unspecified peers and merges the data.
No replies are possible.
It can be, e.g., addressed by socat IP-SENDTO address peers.
@ -3250,12 +3250,10 @@ label(EXAMPLE_ADDRESS_TUN)
dit(bf(tt(socat TCP:host2:4443 TUN:192.168.255.1/24,up)))
establishes one side of a virtual (but not private!) network with host2 where a
similar process might run, with TCP-L and tun address 192.168.255.2. They
can reach each other using the addresses 192.168.255.1 and
192.168.255.2. Substitute the TCP link with an SSL connection protected by
client and server authentication (see OpenSSL
link(client)(EXAMPLE_ADDRESS_OPENSSL_CONNECT) and
link(server)(EXAMPLE_ADDRESS_OPENSSL_LISTEN)).
similar process might run, with UDP-L and tun address 192.168.255.2. They can
reach each other using the addresses 192.168.255.1 and 192.168.255.2. Note that
streaming eg. via TCP or SSL does not guarantee to retain packet boundaries and
may thus cause packet loss.
label(EXAMPLE_INTERFACE)

4
xio-listen.c
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@ -1,5 +1,5 @@
/* source: xio-listen.c */
/* Copyright Gerhard Rieger 2001-2010 */
/* Copyright Gerhard Rieger 2001-2011 */
/* Published under the GNU General Public License V.2, see file COPYING */
/* this file contains the source for listen socket options */
@ -307,7 +307,7 @@ int _xioopen_listen(struct single *xfd, int xioflags, struct sockaddr *us, sockl
pid_t cpid = Getpid();
Sigprocmask(SIG_UNBLOCK, &mask_sigchld, NULL);
Info1("just born: client process "F_pid, cpid);
Info1("just born: child process "F_pid, cpid);
xiosetenvulong("PID", cpid, 1);
if (Close(xfd->fd) < 0) {

2
xio-socket.c
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@ -1090,7 +1090,7 @@ int _xioopen_dgram_sendto(/* them is already in xfd->peersa */
packet in the IP stacks input queue and forks a sub process. The sub process
then reads this packet for processing its data.
There is a problem because the parent process would find the same packet
again if it calls select()/poll() before the client process reads the
again if it calls select()/poll() before the child process reads the
packet.
To solve this problem we implement the following mechanism:
The sub process sends a SIGUSR1 when it has read the packet (or a SIGCHLD if

2
xio-tun.c
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@ -44,7 +44,7 @@ const struct optdesc opt_iff_automedia = { "iff-automedia", "automedia", O
const struct optdesc opt_route = { "route", NULL, OPT_ROUTE, GROUP_INTERFACE, PH_INIT, TYPE_STRING, OFUNC_SPEC };
#endif
const struct addrdesc xioaddr_tun = { "tun", 3, xioopen_tun, GROUP_FD|GROUP_CHR|GROUP_NAMED|GROUP_OPEN|GROUP_TUN, 0, 0, 0 HELP(":<ip-addr>/<bits>") };
const struct addrdesc xioaddr_tun = { "tun", 3, xioopen_tun, GROUP_FD|GROUP_CHR|GROUP_NAMED|GROUP_OPEN|GROUP_TUN, 0, 0, 0 HELP("[:<ip-addr>/<bits>]") };
/* "if-name"=tun3
// "route"=address/netmask
// "ip6-route"=address/netmask

2
xioinitialize.c
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@ -222,7 +222,7 @@ pid_t xio_fork(bool subchild, int level) {
if (pid == 0) { /* child process */
pid_t cpid = Getpid();
Info1("just born: client process "F_pid, cpid);
Info1("just born: child process "F_pid, cpid);
if (!subchild) {
/* set SOCAT_PID to new value */
xiosetenvulong("PID", pid, 1);