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https://github.com/moparisthebest/socat
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improve docu and comments of generic sockets
This commit is contained in:
Gerhard Rieger
parent
13b73776e7
commit
3d95d9d679
113
doc/socat.yo
113
doc/socat.yo
@ -10,7 +10,7 @@ def(Filan)(0)(bf(Filan))
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def(procan)(0)(bf(procan))
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def(Procan)(0)(bf(Procan))
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manpage(socat)(1)(Feb 2008)(socat)()
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manpage(socat)(1)(Sep 2008)(socat)()
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whenhtml(
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label(CONTENTS)
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@ -601,15 +601,15 @@ label(ADDRESS_READLINE)dit(bf(tt(READLINE)))
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link(STDIO)(ADDRESS_STDIO)
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label(ADDRESS_SOCKET_CONNECT)dit(bf(tt(SOCKET-CONNECT:<domain>:<protocol>:<remote-address>)))
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Creates a stream socket using the first and second given socket parameters
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and tt(SOCK_STREAM) (see man
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socket(2)) and connects to the remote-address. The
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two socket parameters have to be specified as numbers of type
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link(int)(TYPE_INT). Consult your OS documentation and include files to find
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the desired values. The remote-address must be the link(data)(TYPE_DATA)
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representation of a sockaddr structure without the sa_family component.nl()
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and tt(SOCK_STREAM) (see man socket(2)) and connects to the remote-address.
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The two socket parameters have to be specified by link(int)(TYPE_INT)
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numbers. Consult your OS documentation and include files to find the
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appropriate values. The remote-address must be the link(data)(TYPE_DATA)
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representation of a sockaddr structure without sa_family and (BSD) sa_len
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components.nl()
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Please note that you can - beyond the options of the specified groups - also
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apply options of higher level protocols when you use socat option
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link(-s)(option_s).nl()
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use options of higher level protocols when you apply socat option
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link(-g)(option_g).nl()
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Option groups: link(FD)(GROUP_FD),link(SOCKET)(GROUP_SOCKET),link(CHILD)(GROUP_CHILD),link(RETRY)(GROUP_RETRY)nl()
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Useful options:
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link(bind)(OPTION_BIND),
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@ -624,15 +624,16 @@ label(ADDRESS_SOCKET_CONNECT)dit(bf(tt(SOCKET-CONNECT:<domain>:<protocol>:<remot
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link(SOCKET-LISTEN)(ADDRESS_SOCKET_LISTEN),
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link(SOCKET-SENDTO)(ADDRESS_SOCKET_SENDTO)
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label(ADDRESS_SOCKET_DATAGRAM)dit(bf(tt(SOCKET-DATAGRAM:<domain>:<type>:<protocol>:<remote-address>)))
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Creates a datagram socket using the first three given socket parameters (see man
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socket(2)) and sends outgoing data to the remote-address. The
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three socket parameters have to be specified as numbers of type
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link(int)(TYPE_INT). Consult your OS documentation and include files to find
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the desired values. The remote-address must be the link(data)(TYPE_DATA)
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representation of a sockaddr structure without the sa_family component.nl()
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Creates a datagram socket using the first three given socket parameters (see
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man socket(2)) and sends outgoing data to the remote-address. The three
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socket parameters have to be specified by link(int)(TYPE_INT)
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numbers. Consult your OS documentation and include files to find the
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appropriate values. The remote-address must be the link(data)(TYPE_DATA)
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representation of a sockaddr structure without sa_family and (BSD) sa_len
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components.nl()
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Please note that you can - beyond the options of the specified groups - also
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apply options of higher level protocols when you use socat option
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link(-s)(option_s).nl()
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use options of higher level protocols when you apply socat option
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link(-g)(option_g).nl()
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Option groups: link(FD)(GROUP_FD),link(SOCKET)(GROUP_SOCKET),link(RANGE)(GROUP_RANGE)
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Useful options:
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link(bind)(OPTION_BIND),
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@ -649,15 +650,15 @@ label(ADDRESS_SOCKET_DATAGRAM)dit(bf(tt(SOCKET-DATAGRAM:<domain>:<type>:<protoco
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link(SOCKET-RECVFROM)(ADDRESS_SOCKET_RECVFROM)
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label(ADDRESS_SOCKET_LISTEN)dit(bf(tt(SOCKET-LISTEN:<domain>:<protocol>:<local-address>)))
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Creates a stream socket using the first and second given socket parameters
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and tt(SOCK_STREAM) (see man
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socket(2)) and waits for incoming connections on local-address. The
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two socket parameters have to be specified as numbers of type
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link(int)(TYPE_INT). Consult your OS documentation and include files to find
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the desired values. The local-address must be the link(data)(TYPE_DATA)
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representation of a sockaddr structure without the sa_family component.nl()
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and tt(SOCK_STREAM) (see man socket(2)) and waits for incoming connections
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on local-address. The two socket parameters have to be specified by
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link(int)(TYPE_INT) numbers. Consult your OS documentation and include files
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to find the appropriate values. The local-address must be the
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link(data)(TYPE_DATA) representation of a sockaddr structure without
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sa_family and (BSD) sa_len components.nl()
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Please note that you can - beyond the options of the specified groups - also
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apply options of higher level protocols when you use socat option
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link(-s)(option_s).nl()
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use options of higher level protocols when you apply socat option
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link(-g)(option_g).nl()
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Option groups: link(FD)(GROUP_FD),link(SOCKET)(GROUP_SOCKET),link(LISTEN)(GROUP_LISTEN),link(RANGE)(GROUP_RANGE),link(CHILD)(GROUP_CHILD),link(RETRY)(GROUP_RETRY)nl()
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Useful options:
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link(setsockopt-int)(OPTION_SETSOCKOPT_INT),
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@ -672,12 +673,12 @@ label(ADDRESS_SOCKET_LISTEN)dit(bf(tt(SOCKET-LISTEN:<domain>:<protocol>:<local-a
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link(SOCKET-SENDTO)(ADDRESS_SOCKET_RECVFROM),
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link(SOCKET-SENDTO)(ADDRESS_SOCKET_RECV)
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label(ADDRESS_SOCKET_RECV)dit(bf(tt(SOCKET_RECV:<domain>:<type>:<protocol>:<local-address>)))
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Creates a socket using the three given socket parameters (see man
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socket(2)) and binds it to <local-address>. Receives arriving data. The
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three parameters have to be specified as numbers of type
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link(int)(TYPE_INT). Consult your OS documentation and include files to find
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the desired values. The local-address must be the link(data)(TYPE_DATA)
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representation of a sockaddr structure without the sa_family component.nl()
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Creates a socket using the three given socket parameters (see man socket(2))
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and binds it to <local-address>. Receives arriving data. The three
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parameters have to be specified by link(int)(TYPE_INT) numbers. Consult your
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OS documentation and include files to find the appropriate values. The
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local-address must be the link(data)(TYPE_DATA) representation of a sockaddr
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structure without sa_family and (BSD) sa_len components.nl()
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Option groups: link(FD)(GROUP_FD),link(SOCKET)(GROUP_SOCKET),link(RANGE)(GROUP_RANGE)
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Useful options:
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link(range)(OPTION_RANGE),
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@ -693,13 +694,13 @@ label(ADDRESS_SOCKET_RECV)dit(bf(tt(SOCKET_RECV:<domain>:<type>:<protocol>:<loca
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link(SOCKET-SENDTO)(ADDRESS_SOCKET_SENDTO),
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link(SOCKET-RECVFROM)(ADDRESS_SOCKET_RECVFROM)
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label(ADDRESS_SOCKET_RECVFROM)dit(bf(tt(SOCKET_RECVFROM:<domain>:<type>:<protocol>:<local-address>)))
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Creates a socket using the three given socket parameters (see man
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socket(2)) and binds it to <local-address>. Receives arriving data and sends
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replies back to the sender. The first three parameters have to be specified as
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numbers of type link(int)(TYPE_INT). Consult your OS documentation and
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include files to find the desired values. The local-address must be the
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link(data)(TYPE_DATA)
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representation of a sockaddr structure without the sa_family component.nl()
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Creates a socket using the three given socket parameters (see man socket(2))
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and binds it to <local-address>. Receives arriving data and sends replies
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back to the sender. The first three parameters have to be specified as
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link(int)(TYPE_INT) numbers. Consult your OS documentation and include files
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to find the appropriate values. The local-address must be the
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link(data)(TYPE_DATA) representation of a sockaddr structure without
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sa_family and (BSD) sa_len components.nl()
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Option groups: link(FD)(GROUP_FD),link(SOCKET)(GROUP_SOCKET),link(CHILD)(GROUP_CHILD),link(RANGE)(GROUP_RANGE)
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Useful options:
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link(fork)(OPTION_FORK),
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@ -717,12 +718,12 @@ label(ADDRESS_SOCKET_RECVFROM)dit(bf(tt(SOCKET_RECVFROM:<domain>:<type>:<protoco
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link(SOCKET-RECV)(ADDRESS_SOCKET_RECV)
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label(ADDRESS_SOCKET_SENDTO)dit(bf(tt(SOCKET_SENDTO:<domain>:<type>:<protocol>:<remote-address>)))
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Creates a socket using the three given socket parameters (see man
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socket(2)). Sends outgoing data to the given address and receives replies.
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The three parameters have to be specified as
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numbers of type link(int)(TYPE_INT). Consult your OS documentation and
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include files to find the desired values. The remote-address must be the
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link(data)(TYPE_DATA) representation of a sockaddr structure without the
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sa_family component.nl()
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socket(2)). Sends outgoing data to the given address and receives replies.
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The three parameters have to be specified as link(int)(TYPE_INT)
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numbers. Consult your OS documentation and include files to find the
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appropriate values. The remote-address must be the link(data)(TYPE_DATA)
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representation of a sockaddr structure without sa_family and (BSD) sa_len
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components.nl()
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Option groups: link(FD)(GROUP_FD),link(SOCKET)(GROUP_SOCKET)
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Useful options:
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link(bind)(OPTION_BIND),
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@ -1793,20 +1794,22 @@ label(OPTION_PROTOCOL_FAMILY)dit(bf(tt(pf=<string>)))
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something like "ip4" or "ip6".
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label(OPTION_SETSOCKOPT_INT)dit(bf(tt(setsockopt-int=<level>:<optname>:<optval>)))
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Invokes tt(setsockopt()) for the socket with the given parameters. tt(level)
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[link(int)(TYPE_INT)] specifies the second argument to tt(setsockopt())
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which specifies the layer, e.g. SOL_TCP (=6 on Linux) for TCP, or SOL_SOCKET
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(=1 on Linux) for the socket layer. tt(optname) [link(int)(TYPE_INT)]
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selects the third argument to tt(setsockopt()) option. For the actual
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integer values you might have to look up the appropriate include file of
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your system. The 4th tt(setsockopt()) parameter, tt(value)
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[link(int)(TYPE_INT)], is passed to the function per pointer, and the length
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parameter to the tt(setsockopt()) call is derived from this type.
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[link(int)(TYPE_INT)] is used as second argument to tt(setsockopt()) and
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specifies the layer, e.g. SOL_TCP for TCP (6 on Linux), or SOL_SOCKET for
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the socket layer (1 on Linux). tt(optname) [link(int)(TYPE_INT)] is the
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third argument to tt(setsockopt()) and tells which socket option is to be
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set. For the actual numbers you might have to look up the appropriate include
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files of your system. The 4th tt(setsockopt()) parameter, tt(value)
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[link(int)(TYPE_INT)], is passed to the function per pointer, and for the
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length parameter sizeof(int) is taken implicitely.
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label(OPTION_SETSOCKOPT_BIN)dit(bf(tt(setsockopt-bin=<level>:<optname>:<optval>)))
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Like tt(setsockopt-int), but <optval> is expected in link(dalan)(TYPE_DATA)
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format and specifies an arbitrary sequence of bytes.
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Like tt(setsockopt-int), but <optval> must be provided in
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link(dalan)(TYPE_DATA) format and specifies an arbitrary sequence of bytes;
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the length parameter is automatically derived from the data.
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label(OPTION_SETSOCKOPT_STRING)dit(bf(tt(setsockopt-string=<level>:<optname>:<optval>)))
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Like tt(setsockopt-int), but <optval> must be a link(string)(TYPE_STRING).
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This string is passed to the function with trailing null character.
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This string is passed to the function with trailing null character, and the
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length parameter is automatically derived from the data.
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enddit()
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startdit()enddit()nl()
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12
xio-listen.c
12
xio-listen.c
@ -81,18 +81,18 @@ int
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}
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/* waits for incoming connection, checks its source address and port. Depending
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/* Waits for incoming connection, checks its source address and port. Depending
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on fork option, it may fork a subprocess.
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pf specifies the syntax expected for range option. In the case of generic
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socket it is 0 (expcting raw binary data), and the real pf can be obtained
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socket it is 0 (expecting raw binary data), and the real pf can be obtained
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from us->af_family; for other socket types pf == us->af_family
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Returns 0 if a connection was accepted; with fork option, this is always in
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a subprocess!
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Returns 0 if a connection was accepted; with fork option, this is already in
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the subprocess!
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Other return values indicate a problem; this can happen in the master
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process or in a subprocess.
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process or in the subprocess.
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This function does not retry. If you need retries, handle this is a
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loop in the calling function.
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after fork, we set the forever/retry of the child process to 0
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After fork, we set the forever/retry of the child process to 0
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*/
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int _xioopen_listen(struct single *xfd, int xioflags, struct sockaddr *us, socklen_t uslen,
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struct opt *opts, int pf, int socktype, int proto, int level) {
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