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* socket.c (dgram_set_sock_peer): Assign to struct
dgram_stream using using set macro.
* stream.c (stdio_set_sock_peer): Assign to struct
stdio_handle peer using set macro.
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* socket.c (sock_connect): If connect fails, show socket and
address in error message.
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* socket.c (struct dgram_stream): New struct.
(make_dgram_sock_stream, dgram_print, dgram_mark,
dgram_destroy, dgram_overflow, dgram_put_byte_callback,
dgram_put_string, dgram_put_char, dgram_put_byte,
dgram_get_byte_callback, dgram_get_char, dgram_get_byte,
dgram_unget_char, dgram_unget_byte, dgram_flush, dgram_close,
dgram_get_prop, dgram_get_fd, dgram_get_sock_family,
dgram_get_sock_type, dgram_get_sock_peer,
dgram_set_sock_peer, dgram_get_error, dgram_get_error_str,
dgram_clear_error): New static functions.
(dgram_strm_ops): New static structure.
(sock_listen): Check against datagram sockets which have
a peer; otherwise a no-op for datagram sockets.
(sock_accept): Special logic for dgram sockets.
(open_sockfd): Function moved here from stream.c, and
augmented to open dgram stream for dgram sockets.
(open_socket): Function moved here from stream.c.
(sock_load_init): Fill in some operations in dgram_strm_ops.
* stream.c (generic_get_line, make_sock_stream,
errno_to_string): Statics become external.
(open_sockfd, open_socket): Functions removed from here,
moved to socket.c.
* stream.h (generic_get_line, make_sock_stream,
errno_to_string): Declared.
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* socket.c (sock_bind, sock_connect, sock_listen): Report
function name as sock-bind, sock-connect and sock-listen,
rather than bind, connect and listen.
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* stream.c (struct stdio_handle): New member, peer.
(stdio_stream_mark): Mark the new member.
(sock_peer, sock_set_peer): New functions.
(stream_init): Registered sock-peer intrinsic.
* stream.h (sock_peer, sock_set_peer): Declared.
* socket.c (sock_connect): If the connect is successful,
then store the address into the stream as the peer.
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* socket.c (sock_bind): Set the SO_REUSEADDR option before
binding the socket, to thwart the EADDRINUSE nuisance.
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* socket.c, socket.h: New files.
* Makefile: include new socket.o among objects if have_objects
variable is defined to 'y'.
* configure (have_sockets): New variable. New configure test
for socket-related functionality.
(HAVE_SOCKETS, HAVE_GETADDRINFO): New configuration
preprocessor symbols.
Also, reordering the shell probing so that /usr/xpg4/bin/sh
is the last fallback. On Solaris, it chokes on some code
that is needed for Solaris.
* lisplib.c (sock_set_entries, sock_instantiate): New static
functions.
(lisplib_init): Register new functions as autoload hooks.
* share/txr/stdlib/socket.tl: New file.
* stream.c (socket_error_s): New symbol variable.
(struct stdio_handle): New members, family and type, helping
stdio streams represent sockets too.
(stdio_stream_mark): Mark new members of struct stdio_handle.
(make_stdio_stream_common): Initialize new members.
(make_sock_stream, stream_fd, sock_family, sock_type,
open_socket, open_sockfd): New functions.
(stream_init): Initialize socket_error_s variable. Register
sock-family, sock-type and open-socket intrinsic functions.
Register socket-error subtype.
* stream.h (socket_error_s, make_sock_stream, stream_fd,
sock_family, sock_type, open_socket, open_sockfd):
Declared.
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