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-rw-r--r--usr.bin/tn3270/api/api_exch.c429
1 files changed, 0 insertions, 429 deletions
diff --git a/usr.bin/tn3270/api/api_exch.c b/usr.bin/tn3270/api/api_exch.c
deleted file mode 100644
index a4626b9..0000000
--- a/usr.bin/tn3270/api/api_exch.c
+++ /dev/null
@@ -1,429 +0,0 @@
-/*-
- * Copyright (c) 1988, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-static char sccsid[] = "@(#)api_exch.c 8.1 (Berkeley) 6/6/93";
-#endif /* not lint */
-
-#include <stdio.h>
-
-#include "../general/general.h"
-
-#include "api_exch.h"
-
-static int sock; /* Socket number */
-
-static char whoarewe[40] = "";
-#define WHO_ARE_WE() fprintf(stderr, "(API %s) ", whoarewe);
-
-static enum {CONTENTION, SEND, RECEIVE } conversation;
-
-static struct exch_exch exch_state;
-
-static unsigned int
- my_sequence,
- your_sequence;
-
-static char ibuffer[4000], *ibuf_next, *ibuf_last;
-#define IBUFADDED(i) ibuf_last += (i)
-#define IBUFAVAILABLE() (ibuf_last-ibuf_next)
-#define IBUFFER() ibuffer
-#define IBUFFREE() (ibuffer+sizeof ibuffer-ibuf_last-1)
-#define IBUFGETBYTES(w,l) { memcpy(w, ibuf_next, l); ibuf_next += l; }
-#define IBUFRESET() (ibuf_next = ibuf_last = ibuffer)
-
-char obuffer[4000], *obuf_next;
-#define OBUFADDBYTES(w,l) { memcpy(obuf_next, w, l); obuf_next += l; }
-#define OBUFAVAILABLE() (obuf_next - obuffer)
-#define OBUFFER() obuffer
-#define OBUFRESET() obuf_next = obuffer
-#define OBUFROOM() (obuffer+sizeof obuffer-obuf_next)
-
-
-static int
-outflush()
-{
- int length = OBUFAVAILABLE();
-
- if (length != 0) {
- if (write(sock, OBUFFER(), length) != length) {
- WHO_ARE_WE();
- perror("write");
- return -1;
- }
- OBUFRESET();
- }
- return 0; /* All OK */
-}
-
-
-static int
-iget(location, length)
-char *location;
-int length;
-{
- int count;
-
- if (OBUFAVAILABLE()) {
- if (outflush() == -1) {
- return -1;
- }
- }
- if ((count = IBUFAVAILABLE()) != 0) {
- if (count > length) {
- count = length;
- }
- IBUFGETBYTES(location, count);
- length -= count;
- location += count;
- }
- while (length) {
- if (ibuf_next == ibuf_last) {
- IBUFRESET();
- }
- if ((count = read(sock, IBUFFER(), IBUFFREE())) < 0) {
- WHO_ARE_WE();
- perror("read");
- return -1;
- }
- if (count == 0) {
- /* Reading past end-of-file */
- WHO_ARE_WE();
- fprintf(stderr, "End of file read\r\n");
- return -1;
- }
- IBUFADDED(count);
- if (count > length) {
- count = length;
- }
- IBUFGETBYTES(location, count);
- length -= count;
- location += count;
- }
- return 0;
-}
-
-static char *
-exch_to_ascii(exch)
-int exch; /* opcode to decode */
-{
- switch (exch) {
- case EXCH_EXCH_COMMAND:
- return "Command";
- case EXCH_EXCH_TYPE:
- return "Type";
- case EXCH_EXCH_TURNAROUND:
- return "Turnaround";
- case EXCH_EXCH_RTS:
- return "Request to Send";
- default:
- {
- static char unknown[40];
-
- sprintf(unknown, "(Unknown exchange 0x%02x)", exch&0xff);
- return unknown;
- }
- }
-}
-
-/*
- * Send the exch structure, updating the sequnce number field.
- */
-
-static int
-send_state()
-{
- if (OBUFROOM() < sizeof exch_state) {
- if (outflush() == -1) {
- return -1;
- }
- }
- my_sequence = (my_sequence+1)&0xff;
- exch_state.my_sequence = my_sequence;
- exch_state.your_sequence = your_sequence;
- OBUFADDBYTES((char *)&exch_state, sizeof exch_state);
- return 0;
-}
-
-/*
- * Receive the exch structure from the other side, checking
- * sequence numbering.
- */
-
-static int
-receive_state()
-{
- if (iget((char *)&exch_state, sizeof exch_state) == -1) {
- return -1;
- }
- if (conversation != CONTENTION) {
- if (exch_state.your_sequence != my_sequence) {
- WHO_ARE_WE();
- fprintf(stderr, "Send sequence number mismatch.\n");
- return -1;
- }
- if (exch_state.my_sequence != ((++your_sequence)&0xff)) {
- WHO_ARE_WE();
- fprintf(stderr, "Receive sequence number mismatch.\n");
- return -1;
- }
- }
- your_sequence = exch_state.my_sequence;
- return 0;
-}
-
-static int
-enter_receive()
-{
- switch (conversation) {
- case CONTENTION:
- exch_state.opcode = EXCH_EXCH_TURNAROUND;
- if (send_state() == -1) {
- return -1;
- }
- if (receive_state() == -1) {
- return -1;
- }
- if (exch_state.opcode != EXCH_EXCH_RTS) {
- WHO_ARE_WE();
- fprintf(stderr, "In CONTENTION state: ");
- if (exch_state.opcode == EXCH_EXCH_TURNAROUND) {
- fprintf(stderr,
- "Both sides tried to enter RECEIVE state.\n");
- } else {
- fprintf(stderr,
- "Protocol error trying to enter RECEIVE state.\n");
- }
- return -1;
- }
- break;
- case SEND:
- exch_state.opcode = EXCH_EXCH_TURNAROUND;
- if (send_state() == -1) {
- return -1;
- }
- break;
- }
- conversation = RECEIVE;
- return 0;
-}
-
-static int
-enter_send()
-{
- switch (conversation) {
- case CONTENTION:
- exch_state.opcode = EXCH_EXCH_RTS;
- if (send_state() == -1) {
- return -1;
- }
- /* fall through */
- case RECEIVE:
- if (receive_state() == -1) {
- return -1;
- }
- if (exch_state.opcode != EXCH_EXCH_TURNAROUND) {
- WHO_ARE_WE();
- fprintf(stderr, "Conversation error - both sides in SEND state.\n");
- return -1;
- }
- }
- conversation = SEND;
- return 0;
-}
-
-int
-api_exch_nextcommand()
-{
- if (conversation != RECEIVE) {
- if (enter_receive() == -1) {
- return -1;
- }
- }
- if (receive_state() == -1) {
- return -1;
- }
- if (exch_state.opcode != EXCH_EXCH_COMMAND) {
- WHO_ARE_WE();
- fprintf(stderr, "Expected a %s exchange, received a %s exchange.\n",
- exch_to_ascii(EXCH_EXCH_COMMAND), exch_to_ascii(exch_state.opcode));
- return -1;
- }
- return exch_state.command_or_type;
-}
-
-
-int
-api_exch_incommand(command)
-int command;
-{
- int i;
-
- if ((i = api_exch_nextcommand()) == -1) {
- return -1;
- }
- if (i != command) {
- WHO_ARE_WE();
- fprintf(stderr, "Expected API command 0x%x, got API command 0x%x.\n",
- command, i);
- return -1;
- }
- return 0;
-}
-
-
-int
-api_exch_outcommand(command)
-int command;
-{
- if (conversation != SEND) {
- if (enter_send() == -1) {
- return -1;
- }
- }
- exch_state.command_or_type = command;
- exch_state.opcode = EXCH_EXCH_COMMAND;
- if (send_state() == -1) {
- return -1;
- } else {
- return 0;
- }
-}
-
-
-int
-api_exch_outtype(type, length, location)
-int
- type,
- length;
-char
- *location;
-{
- int netleng = length;
-
- if (conversation != SEND) {
- if (enter_send() == -1) {
- return -1;
- }
- }
- exch_state.opcode = EXCH_EXCH_TYPE;
- exch_state.command_or_type = type;
- exch_state.length = netleng;
- if (send_state() == -1) {
- return -1;
- }
- if (length) {
- if (OBUFROOM() > length) {
- OBUFADDBYTES(location, length);
- } else {
- if (outflush() == -1) {
- return -1;
- }
- if (write(sock, location, length) != length) {
- WHO_ARE_WE();
- perror("write");
- return -1;
- }
- }
- }
- return 0;
-}
-
-
-int
-api_exch_intype(type, length, location)
-int
- type,
- length;
-char
- *location;
-{
- int netleng = length;
-
- if (conversation != RECEIVE) {
- if (enter_receive() == -1) {
- return -1;
- }
- }
- if (receive_state() == -1) {
- return -1;
- }
- if (exch_state.opcode != EXCH_EXCH_TYPE) {
- WHO_ARE_WE();
- fprintf(stderr,
- "Expected to receive a %s exchange, received a %s exchange.\n",
- exch_to_ascii(EXCH_EXCH_TYPE), exch_to_ascii(exch_state.opcode));
- return -1;
- }
- if (exch_state.command_or_type != type) {
- WHO_ARE_WE();
- fprintf(stderr, "Expected type 0x%x, got type 0x%x.\n",
- type, exch_state.command_or_type);
- return -1;
- }
- if (exch_state.length != netleng) {
- fprintf(stderr, "Type 0x%x - expected length %d, received length %u.\n",
- type, length, exch_state.length);
- return -1;
- }
- if (iget(location, length) == -1) {
- return -1;
- }
- return 0;
-}
-
-int
-api_exch_flush()
-{
- return outflush();
-}
-
-int
-api_exch_init(sock_number, ourname)
-int sock_number;
-char *ourname;
-{
- extern char *strcpy();
-
- sock = sock_number;
- (void) strcpy(whoarewe, ourname); /* For error messages */
-
- my_sequence = your_sequence = 0;
-
- conversation = CONTENTION; /* We don't know which direction */
-
- IBUFRESET();
- OBUFRESET();
-
- return 0;
-}
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