--- lbbs/src/netio.c	2004/10/22 15:20:32	1.3
+++ lbbs/src/netio.c	2025/04/30 09:18:19	1.7
@@ -1,9 +1,9 @@
 /***************************************************************************
-                          netio.c  -  description
-                             -------------------
-    begin                : Mon Oct 18 2004
-    copyright            : (C) 2004 by Leaflet
-    email                : leaflet@leafok.com
+						  netio.c  -  description
+							 -------------------
+	begin                : Mon Oct 18 2004
+	copyright            : (C) 2004 by Leaflet
+	email                : leaflet@leafok.com
  ***************************************************************************/
 
 /***************************************************************************
@@ -16,73 +16,143 @@
  ***************************************************************************/
 
 #include "common.h"
+#include "io.h"
 #include <string.h>
+#include <unistd.h>
 #include <sys/socket.h>
 
-char
-s_getc(int socket)
+char s_getc(int socket)
 {
-  char c;
-  if (recv(socket,&c,1,0)>0)
-    return c;
-  else
-    return '\0';
+	char c;
+	if (recv(socket, &c, 1, 0) > 0)
+		return c;
+	else
+		return '\0';
 }
 
-int
-s_putc(int socket, char c)
+int s_putc(int socket, char c)
 {
-  int ret;
-  
-  ret = send (socket, &c, 1, 0);
-  
-  return ret;
+	int ret;
+
+	ret = send(socket, &c, 1, 0);
+
+	return ret;
 }
 
-int
-s_receive(int socket, char* buffer, int buffer_length, char end_str[])
+int s_receive(int socket, char *buffer, int buffer_length, char end_str[])
 {
-  char buf_str[2048];
-  int buf_read,total_read;
-  int buf_len = 2047;
-
-  if (buf_len+1 > buffer_length)
-    buf_len = buffer_length -1;
-
-  total_read = 0;
-  strcpy(buffer,"");
-  while((buf_read = recv(socket,buf_str,buf_len,0)) > 0)
-  {
-    buf_str[buf_read] = '\0';
-    total_read += buf_read;
-    strcat(buffer,buf_str);
-
-    buf_len = buffer_length - total_read - 1;
-    if (buf_len+1 > buffer_length)
-      buf_len = buffer_length -1;
-
-    if (strcmp((buffer + total_read - strlen(end_str)), end_str) == 0)
-      break;
-    //different line-end symbol in different OS
-    if (strcmp(end_str,"\r") == 0)
-    {
-      if (strcmp((buffer + total_read - 2), "\r\n") == 0)
-        break;
-    }
-  }
+	char buf_str[2048];
+	int buf_read, total_read;
+	int buf_len = 2047;
+
+	if (buf_len + 1 > buffer_length)
+		buf_len = buffer_length - 1;
+
+	total_read = 0;
+	strcpy(buffer, "");
+	while ((buf_read = recv(socket, buf_str, buf_len, 0)) > 0)
+	{
+		buf_str[buf_read] = '\0';
+		total_read += buf_read;
+		strcat(buffer, buf_str);
+
+		buf_len = buffer_length - total_read - 1;
+		if (buf_len + 1 > buffer_length)
+			buf_len = buffer_length - 1;
+
+		if (strcmp((buffer + total_read - strlen(end_str)), end_str) == 0)
+			break;
+		// different line-end symbol in different OS
+		if (strcmp(end_str, "\r") == 0)
+		{
+			if (strcmp((buffer + total_read - 2), "\r\n") == 0)
+				break;
+		}
+	}
 
-  return total_read;
+	return total_read;
 }
 
-int
-s_send(int socket, const char* in_str)
+int s_send(int socket, const char *in_str)
 {
-  int ret;
+	int ret;
+
+	if (in_str != NULL && strlen(in_str) > 0)
+	{
+		ret = send(socket, in_str, strlen(in_str), 0);
+	}
 
-  if (in_str != NULL && strlen(in_str) > 0)
-  {
-    ret = send(socket, in_str, strlen(in_str), 0);
-  }
-  
-  return ret;
+	return ret;
+}
+
+// from Maple-hightman
+// added by flyriver, 2001.3.3
+int telnetopt(int fd, char *buf, int max)
+{
+	unsigned char c, d, e;
+	int pp = 0;
+	unsigned char tmp[30];
+
+	while (pp < max)
+	{
+		c = buf[pp++];
+		if (c == 255)
+		{
+			d = buf[pp++];
+			e = buf[pp++];
+			iflush();
+			if ((d == 253) && (e == 3 || e == 24))
+			{
+				tmp[0] = 255;
+				tmp[1] = 251;
+				tmp[2] = e;
+				write(fd, tmp, 3);
+				continue;
+			}
+			if ((d == 251 || d == 252) && (e == 1 || e == 3 || e == 24))
+			{
+				tmp[0] = 255;
+				tmp[1] = 253;
+				tmp[2] = e;
+				write(fd, tmp, 3);
+				continue;
+			}
+			if (d == 251 || d == 252)
+			{
+				tmp[0] = 255;
+				tmp[1] = 254;
+				tmp[2] = e;
+				write(fd, tmp, 3);
+				continue;
+			}
+			if (d == 253 || d == 254)
+			{
+				tmp[0] = 255;
+				tmp[1] = 252;
+				tmp[2] = e;
+				write(fd, tmp, 3);
+				continue;
+			}
+			if (d == 250)
+			{
+				while (e != 240 && pp < max)
+					e = buf[pp++];
+				tmp[0] = 255;
+				tmp[1] = 250;
+				tmp[2] = 24;
+				tmp[3] = 0;
+				tmp[4] = 65;
+				tmp[5] = 78;
+				tmp[6] = 83;
+				tmp[7] = 73;
+				tmp[8] = 255;
+				tmp[9] = 240;
+				write(fd, tmp, 10);
+			}
+		}
+		else
+			outc(c);
+	}
+	iflush();
+	return 0;
 }