/* handle telnet sequence ----------------------------------------------------*/
static int seq_telnet(vt_t *vt)
{
char msg[3]={C_IAC};
if (vt->esc[1]==C_WILL) { /* option negotiation */
if (vt->nesc<3) return 1;
msg[1]=vt->esc[2]==C_ECHO||vt->esc[2]==C_SUPPGA?C_DO:C_DONT;
msg[2]=vt->esc[2];
if (write(vt->out,msg,3)<3) return 0;
}
else if (vt->esc[1]==C_DO) { /* option negotiation */
if (vt->nesc<3) return 1;
msg[1]=vt->esc[2]==C_ECHO||vt->esc[2]==C_SUPPGA?C_WILL:C_WONT;
msg[2]=vt->esc[2];
if (write(vt->out,msg,3)<3) return 0;
}
else if (vt->esc[1]==C_WONT||vt->esc[1]==C_DONT) { /* option negotiation */
if (vt->nesc<3) return 1;
msg[1]=vt->esc[1]==C_WONT?C_DONT:C_WONT;
msg[2]=vt->esc[2];
if (write(vt->out,msg,3)<3) return 0;
}
else if (vt->esc[1]==C_BRK||vt->esc[1]==C_IP) { /* break or interrupt */
vt->brk=1;
}
else if (vt->esc[1]==C_EC) { /* erase character */
del_cur(vt);
}
else if (vt->esc[1]==C_EL) { /* erase line */
clear_buff(vt);
}
vt->nesc=0;
return 1;
}
void term_consume(char c) {
if(c=='\r') {
if(mode==CMD) {
bprintf("\n");
term_process();
if(mode==CMD) bprintf("\n>");
clear_buff();
} else if(mode==FOLLOWING) {
mode = CMD;
bprintf("\n");
term_init();
}
} else {
if(c==8 || c==127) { //backspace / delete
if(pos>0) {
//remove from buff
pos--;
buff[pos] = ' ';
//delete on their terminal
bprintf("\b \b");
}
} else {
if(pos<BUFF_LEN) {
//store in buff
buff[pos] = c;
pos++;
//echo on their terminal
blue_tx(c);
}
}
}
}
/* call next history ---------------------------------------------------------*/
static int hist_next(vt_t *vt)
{
char *p;
if (!clear_buff(vt)) return 0;
if (vt->cur_h==0||!vt->hist[vt->cur_h-1]) return 1;
for (p=vt->hist[--vt->cur_h];*p;p++) if (!ins_cur(vt,*p)) return 0;
return 1;
}
/* call previous history -----------------------------------------------------*/
static int hist_prev(vt_t *vt)
{
char *p;
if (vt->cur_h>=MAXHIST||!vt->hist[vt->cur_h]) return 1;
if (!clear_buff(vt)) return 0;
for (p=vt->hist[vt->cur_h++];*p;p++) if (!ins_cur(vt,*p)) return 0;
return 1;
}
static int32_t check_command_result(char *buf)
{
int32_t result = EXIT_SUCCESS;
if (NULL == strchr(buf, '0'))
{
result = !EXIT_SUCCESS;
}
clear_buff(buf);
if (debug_flag)
{
result = EXIT_SUCCESS;
}
return result;
}
int main(int argn, char** args){
if(argn!=5){
print("use this format: ./Client name server_ip router_ip router_port\n");
return 0;
}
char* client_name = args[1];
char* client_ip=NULL;
char* server_ip= args[2];
char* router_port= args[4];
char server_data [MAX_STR_SIZE];
clear_buff(server_data,MAX_STR_SIZE);
int ip_input_tokens_num;
char ip_input_tokens[MAX_ARRAY_SIZE][MAX_STR_SIZE];
char ip_input_buffer[MAX_STR_SIZE];
clear_buff(ip_input_buffer, MAX_STR_SIZE);
while( read(STDINFD, ip_input_buffer, MAX_STR_SIZE) > 0 ){
tokenizer(ip_input_buffer, " ", &ip_input_tokens_num, ip_input_tokens);
if(mystrcmp(ip_input_tokens[0], "Set") == 0 && mystrcmp(ip_input_tokens[1], "IP") == 0 && ip_input_tokens_num == 3){
client_ip=ip_input_tokens[2];
replace_char(client_ip,'\n','\0');
break;
}else{
print("You should set your IP first : Set IP 115.2.2.18\n");
}
}
int fd = connect_to_port(atoi(router_port));
char input_buffer[MAX_STR_SIZE];
clear_buff(input_buffer, MAX_STR_SIZE);
while(read(STDINFD, input_buffer, MAX_STR_SIZE) > 0)
{
int input_tokens_num;
char input_tokens[MAX_ARRAY_SIZE][MAX_STR_SIZE];
replace_char(input_buffer,'\n','\0');
char iden_buff[MAX_STR_SIZE];
clear_buff(iden_buff, MAX_STR_SIZE);
strcat(iden_buff, "00");//00 is for client
//parsing input_buffer
tokenizer(input_buffer," ", &input_tokens_num, input_tokens);
char frame[MAX_STR_SIZE];
clear_buff(frame, MAX_STR_SIZE);
char data[MAX_STR_SIZE];
clear_buff(data, MAX_STR_SIZE);
//send command for server
if( (mystrcmp(input_tokens[0], "DC") < 0) && (mystrcmp(input_tokens[0], "Logout") < 0) )
{
if( strcmp(input_tokens[0],"Send")==0 && strcmp(input_tokens[1],"message")==0 && input_tokens_num==3){
strcat(data,"Sent message: ");
strcat(data,input_tokens[2]);
} else if(strcmp(input_tokens[0],"Send")==0 && strcmp(input_tokens[1],"file")==0 && input_tokens_num==3){
if(!file_exist(input_tokens[2])){
printf("file %s doesn't exist! You should create this file near ./Client 's directory\n", input_tokens[2]);
continue;
}
char file_content[MAX_STR_SIZE];
clear_buff(file_content,MAX_STR_SIZE);
read_entire_file(input_tokens[2],file_content);
replace_char(file_content,'\n','^');
strcat(data,"Sent file ");
strcat(data,input_tokens[2]);
strcat(data," contain:\n");
strcat(data,file_content);
}
else
strcat(data,input_buffer);
framing(iden_buff,"0",client_ip,client_name,data,"cccc","cc",frame);
printf("sent frame is: %s\n",frame );
int bytes_written = write(fd, frame, strlength(frame));
if(bytes_written < 0)
write(STDOUTFD,"Error on writing\n", sizeof("Error on writing\n"));
//get response from server
char res_status[MAX_STR_SIZE];
clear_buff(res_status, MAX_STR_SIZE);
int read_status = read(fd, res_status, MAX_STR_SIZE);
//show the response to client
printf("status of result of first reading ...\n");
write(STDOUTFD, res_status, strlength(res_status));
printf("\n");
char res_buff[MAX_STR_SIZE];
clear_buff(res_buff, MAX_STR_SIZE);
read_status = read(fd, res_buff, MAX_STR_SIZE);
process_client_command(res_buff,server_data );
printf("result is:\n%s\n",res_buff );
int input_tokens_num;
char input_tokens[MAX_ARRAY_SIZE][MAX_STR_SIZE];
tokenizer(res_buff, "&", &input_tokens_num, input_tokens);
//show the response to client
write(STDOUTFD, input_tokens[5], strlength(input_tokens[5]));
printf("\n");
}
else if(mystrcmp(input_tokens[0], "DC") == 0)
{
int bytes_written = write(fd, "DC", strlength("DC"));
if(bytes_written < 0)
write(STDOUTFD,"Error on writing\n", sizeof("Error on writing\n"));
break;
}
else if(mystrcmp(input_tokens[0], "Logout") == 0)
{
int bytes_written = write(fd,"DC", strlength("DC"));
if(bytes_written < 0)
write(STDOUTFD,"Error on writing\n", sizeof("Error on writing\n"));
close(fd);
return 0;
}
}
close(fd);
return 0;
}
void term_init(void) {
clear_buff();
mode = CMD;
bprintf(">");
}