diff options
Diffstat (limited to 'Doc/lib/libsocket.tex')
-rw-r--r-- | Doc/lib/libsocket.tex | 51 |
1 files changed, 28 insertions, 23 deletions
diff --git a/Doc/lib/libsocket.tex b/Doc/lib/libsocket.tex index b826601..9b3c228 100644 --- a/Doc/lib/libsocket.tex +++ b/Doc/lib/libsocket.tex @@ -37,8 +37,8 @@ All errors raise exceptions. The normal exceptions for invalid argument types and out-of-memory conditions can be raised; errors related to socket or address semantics raise the error \code{socket.error}. -Non-blocking and asynchronous mode are not supported; see module -\code{select} for a way to do non-blocking socket I/O. +Non-blocking mode is supported through the \code{setblocking()} +method. The module \code{socket} exports the following constants and functions: @@ -95,7 +95,7 @@ is an IP address itself it is returned unchanged. Return a string containing the hostname of the machine where the Python interpreter is currently executing. If you want to know the current machine's IP address, use -\code{socket.gethostbyname(socket.gethostname())} instead. +\code{socket.gethostbyname(socket.gethostname())}. \end{funcdesc} \begin{funcdesc}{gethostbyaddr}{ip_address} @@ -133,7 +133,7 @@ standard input or output (e.g.\ a server started by the \UNIX{} inet daemon). \end{funcdesc} -\subsection{Socket Object Methods} +\subsection{Socket Objects} \noindent Socket objects have the following methods. Except for @@ -187,28 +187,30 @@ see above.) \begin{funcdesc}{getsockopt}{level\, optname\optional{\, buflen}} Return the value of the given socket option (see the \UNIX{} man page -{\it getsockopt}(2)). The needed symbolic constants are defined in -the \code{socket} module (\code{SO_*} etc.). If the optional third -argument is absent, an integer option is assumed and its integer value +{\it getsockopt}(2)). The needed symbolic constants (\code{SO_*} etc.) +are defined in this module. If \var{buflen} +is absent, an integer option is assumed and its integer value is returned by the function. If \var{buflen} is present, it specifies the maximum length of the buffer used to receive the option in, and -this buffer is returned as a string. It's up to the caller to decode +this buffer is returned as a string. It is up to the caller to decode the contents of the buffer (see the optional built-in module \code{struct} for a way to decode C structures encoded as strings). \end{funcdesc} \begin{funcdesc}{listen}{backlog} -Listen for connections made to the socket. -The argument specifies the maximum number of queued connections and -should be at least 1; the maximum value is system-dependent. +Listen for connections made to the socket. The \var{backlog} argument +specifies the maximum number of queued connections and should be at +least 1; the maximum value is system-dependent (usually 5). \end{funcdesc} -\begin{funcdesc}{makefile}{mode} -Return a \dfn{file object} associated with the socket. -(File objects were described earlier under Built-in Types.) -The file object references a \code{dup}ped version of the socket file -descriptor, so the file object and socket object may be closed or -garbage-collected independently. +\begin{funcdesc}{makefile}{\optional{mode\optional{\, bufsize}}} +Return a \dfn{file object} associated with the socket. (File objects +were described earlier under Built-in Types.) The file object +references a \code{dup()}ped version of the socket file descriptor, so +the file object and socket object may be closed or garbage-collected +independently. The optional \var{mode} and \var{bufsize} arguments +are interpreted the same way as by the built-in +\code{open()} function. \end{funcdesc} \begin{funcdesc}{recv}{bufsize\optional{\, flags}} @@ -219,23 +221,26 @@ for the meaning of the optional argument \var{flags}; it defaults to zero. \end{funcdesc} -\begin{funcdesc}{recvfrom}{bufsize} +\begin{funcdesc}{recvfrom}{bufsize\optional{\, flags}} Receive data from the socket. The return value is a pair \code{(\var{string}, \var{address})} where \var{string} is a string representing the data received and \var{address} is the address of the -socket sending the data. +socket sending the data. The optional \var{flags} argument has the +same meaning as for \code{recv()} above. (The format of \var{address} depends on the address family --- see above.) \end{funcdesc} -\begin{funcdesc}{send}{string} +\begin{funcdesc}{send}{string\optional{\, flags}} Send data to the socket. The socket must be connected to a remote -socket. Return the number of bytes sent. +socket. The optional \var{flags} argument has the same meaning as for +\code{recv()} above. Return the number of bytes sent. \end{funcdesc} -\begin{funcdesc}{sendto}{string\, address} +\begin{funcdesc}{sendto}{string\optional{\, flags}\, address} Send data to the socket. The socket should not be connected to a remote socket, since the destination socket is specified by -\code{address}. Return the number of bytes sent. +\code{address}. The optional \var{flags} argument has the same +meaning as for \code{recv()} above. Return the number of bytes sent. (The format of \var{address} depends on the address family --- see above.) \end{funcdesc} |