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host.c
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host.c
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//
// "$Id: host.c 31224 2020-08-23 15:05:10 $"
//
// tinyTerm -- A minimal serail/telnet/ssh/sftp terminal emulator
//
// host.c is the host communication implementation
// serial communication is based on WIN32 API.
// telnet communication is based on socket API
//
// Copyright 2018-2020 by Yongchao Fan.
//
// This library is free software distributed under GNU GPL 3.0,
// see the license at:
//
// https://github.com/yongchaofan/tinyTerm/blob/master/LICENSE
//
// Please report all bugs and problems on the following page:
//
// https://github.com/yongchaofan/tinyTerm/issues/new
//
#include "tiny.h"
#include <ws2tcpip.h>
#include <windows.h>
#include <io.h>
#include <time.h>
DWORD WINAPI stdio(void *pv);
DWORD WINAPI serial(void *pv);
DWORD WINAPI telnet(void *pv);
DWORD WINAPI ssh(void *pv);
DWORD WINAPI sftp(void *pv);
void stdio_Close(HOST *ph);
void host_Construct(HOST *ph )
{
ph->sock = 0;
ph->type = NONE;
ph->status=IDLE;
ph->homedir[0]=0;
ssh2_Construct(ph);
}
void host_Open(HOST *ph, char *port)
{
if (ph->status==IDLE )
{
if ( port!=NULL )
{
ph->cmdline[0] = 0;
if ( strncmp(port, "netconf", 7)==0 )
strcpy(ph->cmdline, "ssh -s ");
strncat(ph->cmdline, port, 248);
ph->cmdline[255] = 0;
}
port = ph->cmdline;
LPTHREAD_START_ROUTINE reader = stdio;
if ( strnicmp(port, "com",3)==0 )
reader = serial;
else if ( strncmp(port, "telnet", 6)==0 ) {
reader = telnet;
}
else if ( strncmp(port, "ssh", 3)==0 ) {
reader = ssh;
}
else if ( strncmp(port, "sftp", 4)==0 ){
reader = sftp;
}
CreateThread(NULL, 0, reader, ph, 0, NULL);
}
else {
if ( strnicmp(port, "disconn", 7)==0 ) host_Close(ph);
}
}
void host_Send(HOST *ph, char *buf, int len)
{
DWORD dwWrite;
switch (ph->type ) {
case STDIO: if ( *buf==3 && len==1 ) //CTRL+C
stdio_Close(ph);
else
WriteFile(ph->hStdioWrite, buf, len, &dwWrite, NULL);
break;
case SERIAL:WriteFile(ph->hSerial, buf, len, &dwWrite, NULL); break;
case TELNET:if (ph->sock>0 ) send(ph->sock, buf, len, 0); break;
case SSH:
case SFTP:
case NETCONF: ssh2_Send(ph, buf, len); break;
default: if (ph->status!=IDLE ) ssh2_Send(ph, buf, len);
}
}
void host_Send_Size(HOST *ph, int w, int h)
{
if (ph->type==SSH ) ssh2_Size(ph, w, h);
}
int host_Status(HOST *ph )
{
return ph->status;
}
int host_Type(HOST *ph)
{
return ph->type;
}
void host_Close(HOST *ph)
{
switch (ph->type ) {
case STDIO: stdio_Close(ph); break;
case SERIAL:SetEvent(ph->hExitEvent); break;
case TELNET:closesocket(ph->sock); break;
case SFTP: sftp_Close(ph); break;
case SSH:
case NETCONF:ssh2_Close(ph); break;
}
}
void host_Destory()
{
}
/***************************Serial*****************************/
const char SOH = 0x01;
const char STX = 0x02;
const char EOT = 0x04;
const char ACK = 0x06;
const char NAK = 0x15;
static unsigned char xmodem_buf[133];
static unsigned char xmodem_blk;
static int xmodem_timeout;
static FILE *xmodem_fp;
static BOOL bXmodem, xmodem_crc, xmodem_started;
void block_crc()
{
unsigned short crc = 0;
for ( int i=3; i<131; i++ ) {
crc = crc ^ xmodem_buf[i] << 8;
for ( int j=0; j<8; j++ ) {
if (crc & 0x8000)
crc = crc << 1 ^ 0x1021;
else
crc = crc << 1;
}
}
xmodem_buf[131] = (crc>>8) & 0xff;
xmodem_buf[132] = crc & 0xff;
}
void xmodem_block(HOST *ph)
{
xmodem_buf[0] = SOH;
xmodem_buf[1] = ++xmodem_blk;
xmodem_buf[2] = 255-xmodem_blk;
int cnt = fread( xmodem_buf+3, 1, 128, xmodem_fp);
if ( cnt <= 0 ) {
xmodem_buf[0] = EOT;
fclose(xmodem_fp);
}
if ( cnt>0 && cnt<128 )
for ( int i=cnt+3; i<131; i++ ) xmodem_buf[i] = 0;
if ( xmodem_crc ) {
block_crc();
}
else {
unsigned char chksum = 0;
for ( int i=3; i<131; i++ ) chksum += xmodem_buf[i];
xmodem_buf[131] = chksum;
}
}
void xmodem_send(HOST *ph)
{
xmodem_started = TRUE;
if ( xmodem_buf[0]==EOT )
host_Send(ph, (char *)xmodem_buf, 1);
else
host_Send(ph, (char *)xmodem_buf, xmodem_crc?133:132);
}
void xmodem_recv(HOST *ph, char op)
{
switch( op ) {
case 0: //nothing received,resend every 10 seconds
if ( ++xmodem_timeout%10000==0 && xmodem_started ) {
xmodem_send(ph);
term_Disp(ph->term, "R");
}
if ( xmodem_timeout>60000 ) { //timeout after 60 seconds
bXmodem = FALSE;
fclose(xmodem_fp);
term_Disp(ph->term, "Aborted\r\n");
}
break;
case 0x06: xmodem_timeout = 0; //ACK
if ( xmodem_buf[0] == EOT ) {
term_Disp(ph->term, "Completed\r\n");
bXmodem = FALSE;
return;
}
xmodem_block(ph);
xmodem_send(ph);
if ( xmodem_blk==0 ) term_Disp(ph->term, ".");
break;
case 0x15: term_Disp(ph->term, "N"); //NAK
xmodem_send(ph);
break;
case 'C': term_Disp(ph->term, "CRC"); //start CRC
xmodem_crc = TRUE;
block_crc();
xmodem_send(ph);
break;
}
}
void xmodem_init(HOST *ph, FILE *fp)
{
xmodem_fp = fp;
bXmodem = TRUE;
xmodem_crc = FALSE;
xmodem_started = FALSE;
xmodem_timeout = 0;
xmodem_blk = 0;
xmodem_block(ph);
term_Disp(ph->term, "xmodem");
}
DWORD WINAPI serial(void *pv)
{
HOST *ph = (HOST *)pv;
char port[256] = "\\\\.\\";
strcat( port, ph->cmdline);
char *p = strchr( port, ':');
if ( p!=NULL ) *p++ = 0;
if ( p==NULL || *p==0 ) p = "9600,n,8,1";
ph->hSerial = CreateFileA( port, GENERIC_READ|GENERIC_WRITE,
0, NULL, OPEN_EXISTING, 0, NULL);
if (ph->hSerial==INVALID_HANDLE_VALUE ) {
term_Disp(ph->term, "Couldn't open serial port\r\n");
goto comm_close;
}
COMMTIMEOUTS timeouts = { 1, 0, 1, 0, 0 };
//ReadIntervalTimeout = 1
//ReadTotalTimeoutMultiplier = 0
//ReadTotalTimeoutConstant = 1
//WriteTotalTimeoutMultiplier = 0
//WriteTotalTimeoutConstant = 0
if ( SetCommTimeouts(ph->hSerial, &timeouts)==0 ) {
term_Disp(ph->term, "couldn't set serial port timeout\r\n");
CloseHandle(ph->hSerial);
goto comm_close;
}
SetupComm(ph->hSerial, 4096, 1024); //comm buffer sizes
DCB dcb; // comm port settings
memset(&dcb, 0, sizeof(dcb));
dcb.DCBlength = sizeof(dcb);
BuildCommDCBA(p, &dcb);
if ( SetCommState(ph->hSerial, &dcb )==0 ) {
term_Disp(ph->term, "Invalid serial port settings\r\n");
CloseHandle(ph->hSerial);
goto comm_close;
}
ph->hostname = ph->cmdline;
ph->type = SERIAL;
ph->status=CONNECTED;
bXmodem = FALSE;
term_Title(ph->term, ph->cmdline);
term_Disp(ph->term, "connected\r\n");
ph->hExitEvent = CreateEventA( NULL, TRUE, FALSE, "COM exit");
while ( WaitForSingleObject(ph->hExitEvent, 0) == WAIT_TIMEOUT ) {
char buf[256];
DWORD dwCCH;
if ( ReadFile(ph->hSerial, buf, 256, &dwCCH, NULL ) ) {
if ( bXmodem ) {
char op = 0;
if ( dwCCH>0 ) op = buf[dwCCH-1];
xmodem_recv(ph, op);
continue;
}
if ( dwCCH > 0 )
term_Parse(ph->term, buf, dwCCH);
else
Sleep(1);//give WriteFile a chance to complete
}
else
if ( !ClearCommError(ph->hSerial, NULL, NULL) ) break;
}
term_Error(ph->term, "Disconnected");
CloseHandle(ph->hExitEvent);
CloseHandle(ph->hSerial);
ph->type = NONE;
ph->status=IDLE;
comm_close:
term_Title(ph->term, "");
return 1;
}
/***************Telnet*******************************/
int host_tcp(HOST *ph )
{
int rc = 0;
struct addrinfo *ainfo;
if ( getaddrinfo(ph->hostname, NULL, NULL, &ainfo)!=0 ) {
term_Disp(ph->term, "invalid ip address or hostname\r\n");
return -1;
}
((struct sockaddr_in *)(ainfo->ai_addr))->sin_port = htons(ph->port);
ph->sock= socket(ainfo->ai_family, SOCK_STREAM, 0);
term_Disp(ph->term, "Trying...");
if ( connect(ph->sock, ainfo->ai_addr, ainfo->ai_addrlen)==SOCKET_ERROR ) {
switch ( WSAGetLastError() ) {
case WSAEHOSTUNREACH:
case WSAENETUNREACH:
term_Error(ph->term, "host unreachable"); break;
case WSAECONNRESET:
term_Error(ph->term, "connection reset"); break;
case WSAETIMEDOUT:
term_Error(ph->term, "connection timeout");break;
case WSAECONNREFUSED:
term_Error(ph->term, "connection refused");break;
default:
term_Error(ph->term, "connection failure");
}
closesocket(ph->sock);
ph->sock = 0;
rc = -1;
}
freeaddrinfo(ainfo);
return rc;
}
DWORD WINAPI telnet(void *pv)
{
HOST *ph = (HOST *)pv;
char port[256];
strcpy( port, ph->cmdline+7);
ph->hostname = port;
ph->port = 23;
char *p=strchr(port, ':');
char *q=strrchr(port, ':');
if ( p!=NULL && p==q ) {
*p++=0;
ph->port=atoi(p);
}
ph->status=CONNECTING;
term_Title(ph->term, ph->hostname);
if ( host_tcp(ph)!=-1 )
{
ph->type=TELNET;
ph->status=CONNECTED;
term_Disp(ph->term, "connected\r\n");
char buf[4096];
int cnt;
while ( (cnt=recv(ph->sock, buf, 4096, 0)) > 0 ) {
term_Parse(ph->term, buf, cnt);
}
closesocket(ph->sock);
ph->sock = 0;
ph->type = NONE;
term_Error(ph->term, "Disconnected");
}
ph->status=IDLE;
term_Title(ph->term, "");
return 1;
}
/***************************STDIO*******************************/
static PROCESS_INFORMATION piStd;
DWORD WINAPI stdio( void *pv)
{
HOST *ph = (HOST *)pv;
HANDLE Stdin_Rd, Stdin_Wr ;
HANDLE Stdout_Rd, Stdout_Wr, Stderr_Wr;
memset(&piStd, 0, sizeof(PROCESS_INFORMATION));
SECURITY_ATTRIBUTES saAttr;
saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
saAttr.bInheritHandle = TRUE; //Set the bInheritHandle flag
saAttr.lpSecurityDescriptor = NULL; //so pipe handles are inherited
CreatePipe(&Stdout_Rd, &Stdout_Wr, &saAttr, 0);//pipe for child's STDOUT
SetHandleInformation(Stdout_Rd, HANDLE_FLAG_INHERIT, 0);
// Ensure the read handle to the pipe for STDOUT is not inherited
CreatePipe(&Stdin_Rd, &Stdin_Wr, &saAttr, 0); //pipe for child's STDIN
SetHandleInformation(Stdin_Wr, HANDLE_FLAG_INHERIT, 0);
// Ensure the write handle to the pipe for STDIN is not inherited
DuplicateHandle(GetCurrentProcess(),Stdout_Wr,
GetCurrentProcess(),&Stderr_Wr,0,
TRUE,DUPLICATE_SAME_ACCESS);
DuplicateHandle(GetCurrentProcess(),Stdout_Rd,
GetCurrentProcess(),&ph->hStdioRead,0,
TRUE,DUPLICATE_SAME_ACCESS);
DuplicateHandle(GetCurrentProcess(),Stdin_Wr,
GetCurrentProcess(),&ph->hStdioWrite,0,
TRUE,DUPLICATE_SAME_ACCESS);
CloseHandle(Stdin_Wr);
CloseHandle(Stdout_Rd);
struct _STARTUPINFOA siStartInfo;
memset(&siStartInfo, 0, sizeof(STARTUPINFO)); // Set STARTUPINFO
siStartInfo.cb = sizeof(STARTUPINFO);
siStartInfo.hStdError = Stderr_Wr;
siStartInfo.hStdOutput = Stdout_Wr;
siStartInfo.hStdInput = Stdin_Rd;
siStartInfo.dwFlags |= STARTF_USESTDHANDLES;
if ( CreateProcessA(NULL, // Create the child process.
ph->cmdline, // command line
NULL, // process security attributes
NULL, // primary thread security attributes
TRUE, // handles are inherited
CREATE_NO_WINDOW,// creation flags
NULL, // use parent's environment
NULL, // use parent's current directory
&siStartInfo, // STARTUPINFO pointer
&piStd) ) { // receives PROCESS_INFORMATION
CloseHandle(Stdin_Rd);
CloseHandle(Stdout_Wr);
CloseHandle(Stderr_Wr);
ph->type = STDIO;
ph->status=CONNECTED;
while ( TRUE ) {
DWORD dwCCH;
char buf[4096];
if ( ReadFile(ph->hStdioRead, buf, 4096, &dwCCH, NULL) > 0 ) {
if ( dwCCH > 0 )
term_Parse(ph->term, buf, dwCCH);
else
Sleep(1);
}
else
break;
}
ph->status=IDLE;
ph->type = NONE;
}
else
term_Disp(ph->term, "Invalid command\r\n");
CloseHandle(ph->hStdioRead);
CloseHandle(ph->hStdioWrite);
term_Title(ph->term, "");
return 1;
}
void stdio_Close(HOST *ph)
{
if ( WaitForSingleObject(piStd.hProcess, 100)==WAIT_TIMEOUT )
TerminateProcess(piStd.hProcess,0);
CloseHandle(piStd.hThread);
CloseHandle(piStd.hProcess);
}
/**********************************HTTPd*******************************/
extern TERM *pt;
const char *RFC1123FMT="%a, %d %b %Y %H:%M:%S GMT";
const char *exts[]={".txt",
".htm", ".html",
".js",
".jpg", ".jpeg",
".png",
".css"
};
const char *mime[]={"text/plain",
"text/html", "text/html",
"text/javascript",
"image/jpeg", "image/jpeg",
"image/png",
"text/css"
};
const char HEADER[]="HTTP/1.1 200 Ok\nServer: tinyTerm\n\
Access-Control-Allow-Origin: *\nContent-Type: text/plain\n\
Cache-Control: no-cache\nContent-length: %d\n\n";
void httpFile( int s1, char *file)
{
char reply[4096], timebuf[128];
int len, i, j;
time_t now;
now = time(NULL);
strftime(timebuf, sizeof(timebuf), RFC1123FMT, gmtime( &now ));
struct stat sb;
if ( stat( file, &sb )==-1 || strstr(file, ".." )!=NULL ) {
len=sprintf(reply, "HTTP/1.1 404 not found\nDate: %s\n", timebuf);
len+=sprintf(reply+len, "Server: tinyTerm\nConnection: close\n");
len+=sprintf(reply+len, "Content-Type: text/html\nContent-Length: 14");
len+=sprintf(reply+len, "\n\nfile not found");
send(s1, reply, len, 0);
return;
}
FILE *fp = fopen( file, "rb");
if ( fp!=NULL ) {
len=sprintf(reply, "HTTP/1.1 200 Ok\nDate: %s\n", timebuf);
len+=sprintf(reply+len, "Server: tinyTerm\nConnection: close\n");
const char *filext=file+strlen(file)-1;
while ( *filext!='.' ) filext--;
for ( i=0, j=0; j<8; j++ ) if ( strcmp(filext, exts[j])==0 ) i=j;
len+=sprintf(reply+len, "Content-Type: %s\n", mime[i]);
long filesize = sb.st_size;
len+=sprintf(reply+len, "Content-Length: %ld\n", filesize);
strftime(timebuf, sizeof(timebuf), RFC1123FMT, gmtime( &sb.st_mtime ));
len+=sprintf(reply+len, "Last-Modified: %s\n\n", timebuf);
send(s1, reply, len, 0);
while ( (len=fread(reply, 1, 4096, fp))>0 )
if ( send(s1, reply, len, 0)==-1) break;
fclose(fp);
}
}
int url_decode(char *url)
{
char *p = url, *q = url;
while ( *p ) {
if ( *p=='%' && isdigit(p[1]) ) {
int a;
sscanf( ++p, "%02x", &a);
*(++p) = a;
}
*q++ = *p++;
}
*q = 0;
return q-url;
}
DWORD WINAPI httpd( void *pv )
{
char buf[4096], *cmd, *reply;
struct sockaddr_in cltaddr;
int addrsize=sizeof(cltaddr), cmdlen, replen;
SOCKET http_s0 = *(SOCKET *)pv;
while ( TRUE ) {
SOCKET http_s1 = accept(http_s0, (struct sockaddr*)&cltaddr, &addrsize);
if ( http_s1 == INVALID_SOCKET ) break;
cmdlen=recv(http_s1, buf, 4095, 0);
if ( cmdlen>0 ) {
if ( strncmp(buf, "GET /", 5)!=0 ) {//TCP connection
term_Send(pt, buf, cmdlen);
do {
if ( host_Status(pt->host)==CONNECTED ) {
replen = term_Recv(pt, &reply);
if ( replen > 0 ) send(http_s1, reply, replen, 0);
}
struct timeval tv = { 0, 100 }; //tv_sec=0, tv_usec=100
FD_SET readset;
FD_ZERO(&readset);
FD_SET(http_s1, &readset);
if ( select(1, &readset, NULL, NULL, &tv)>0 ) {
cmdlen = recv(http_s1, buf, 4095, 0);
if ( cmdlen>0 )
term_Send(pt, buf, cmdlen);
}
} while (cmdlen>0);
}
else { //HTTP connection
do {
buf[cmdlen] = 0;
cmd = buf+5;
char *p=strchr(cmd, ' ');
if ( p!=NULL ) *p = 0;
url_decode(cmd);
if ( *cmd=='?' ) { //get CGI, cmd+1 points to command
replen = term_Cmd(pt, cmd+1, &reply);
int len = sprintf(buf, HEADER, replen);
send(http_s1, buf, len, 0);
if ( replen>0 ) send(http_s1, reply, replen, 0);
}
else { //get file, cmd points to filename
httpFile(http_s1, cmd);
}
cmdlen = recv(http_s1, buf, 4095, 0);
} while ( cmdlen>0);
}
}
shutdown(http_s1, SD_SEND);
closesocket(http_s1);
}
return 0;
}
int http_Svr(char *intf)
{
static SOCKET http_s0=INVALID_SOCKET;
if ( http_s0 !=INVALID_SOCKET ) {
closesocket(http_s0);
http_s0 = INVALID_SOCKET;
return 0;
}
http_s0 = socket(AF_INET, SOCK_STREAM, 0);
if ( http_s0==INVALID_SOCKET ) return 0;
struct sockaddr_in svraddr;
int addrsize=sizeof(svraddr);
memset(&svraddr, 0, addrsize);
svraddr.sin_family=AF_INET;
svraddr.sin_addr.s_addr=inet_addr(intf);
int p;
for ( p=8080; p<8099; p++ ) {
svraddr.sin_port=htons(p);
if ( bind(http_s0, (struct sockaddr*)&svraddr, addrsize)!=SOCKET_ERROR ) {
if ( listen(http_s0, 1)!=SOCKET_ERROR){
DWORD dwThreadId;
CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)httpd,
&http_s0, 0, &dwThreadId);
return p;
}
}
}
closesocket(http_s0);
http_s0 = INVALID_SOCKET;
return 0;
}
/**********************************FTPd*******************************/
static SOCKET ftp_s0 = INVALID_SOCKET;
static SOCKET ftp_s1 = INVALID_SOCKET;
int sock_select( SOCKET s, int secs )
{
struct timeval tv = { 0, 0 };
tv.tv_sec = secs;
FD_SET svrset;
FD_ZERO(&svrset);
FD_SET(s, &svrset);
return select(1, &svrset, NULL, NULL, &tv);
}
void sock_send(char *reply)
{
send(ftp_s1, reply, strlen(reply), 0);
}
BOOL is_directory(char *root)
{
struct stat sb;
if ( stat(root, &sb)==-1 ) {
term_Print(pt, "FTPD: %s doesn't exist\n", root);
return FALSE;
}
if ( (sb.st_mode&S_IFMT)!=S_IFDIR ) {
term_Print(pt, "FTPD: %s is not a directory\n", root);
return FALSE;
}
return TRUE;
}
DWORD WINAPI ftpd(LPVOID p)
{
unsigned long dwIp;
unsigned short wPort;
unsigned int c[6], ii[2];
char *param=0, szBuf[32768];
char fn[MAX_PATH], workDir[MAX_PATH], rootDir[MAX_PATH];
BOOL bPassive;
SOCKET s2=-1, s3=-1; // s2 data connection, s3 data listen
struct sockaddr_in svraddr, clientaddr; // for data connection
int addrsize=sizeof(clientaddr);
strcpy( rootDir, (char*)p);
term_Print(pt, "FTPd started at %s\r\n", rootDir);
int ret0, ret1;
while( (ret0=sock_select(ftp_s0, 900)) == 1 ) {
strcpy(workDir, "\\");;
ftp_s1 = accept( ftp_s0, (struct sockaddr*)&clientaddr, &addrsize);
if ( ftp_s1 ==INVALID_SOCKET ) continue;
sock_send("220 Welcome\n");
getpeername(ftp_s1, (struct sockaddr *)&clientaddr, &addrsize);
term_Print(pt, "FTPd: connected from %s\n",
inet_ntoa(clientaddr.sin_addr));
FILE *fp;
bPassive = FALSE;
BOOL bUser=FALSE, bPass=FALSE;
while ( (ret1=sock_select(ftp_s1, 300)) == 1 ) {
int cnt=recv(ftp_s1, szBuf, 1024, 0);
if ( cnt<=0 ) {
term_Disp(pt, "FTPd: client disconnected\n");
break;
}
szBuf[cnt--]=0;
term_Disp(pt, szBuf);
while (szBuf[cnt]=='\r' || szBuf[cnt]=='\n' ) szBuf[cnt--]=0;
if ( (param=strchr(szBuf, ' '))!=NULL )
*param++=0;
else
param = szBuf+cnt+1;
// *** Process FTP commands ***
if (stricmp("user", szBuf) == 0){
sock_send("331 Password required\n");
bUser = strncmp(param, "tiny", 4 )==0 ? TRUE : FALSE;
continue;
}
if (stricmp("pass", szBuf) == 0){
bPass = bUser && strncmp(param, "term", 4)==0;
sock_send(bPass ? "230 Logged in okay\n":
"530 Login incorrect\n");
continue;
}
if ( !bPass ) {
sock_send("530 Login required\n");
continue;
}
strcpy(fn, rootDir);
strcat(fn, workDir);
if ( workDir[strlen(workDir)-1]!='\\' ) strcat(fn, "\\");
strcat(fn, param);
if (stricmp("syst", szBuf) ==0 ){
sock_send("215 tinyTerm ftpd\n");
}
else if(stricmp("port", szBuf) == 0){
sscanf(param, "%d,%d,%d,%d,%d,%d",
&c[0], &c[1], &c[2], &c[3], &c[4], &c[5]);
ii[0] = c[1]+(c[0]<<8);
ii[1] = c[3]+(c[2]<<8);
wPort = c[5]+(c[4]<<8);
dwIp = ii[1]+(ii[0]<<16);
clientaddr.sin_addr.s_addr = htonl(dwIp);
clientaddr.sin_port=htons(wPort);
sock_send("200 PORT command successful\n");
}
else if(stricmp("type", szBuf) == 0){
sock_send("200 Type can only be binary\n");
}
else if(stricmp("pwd", szBuf) == 0 || stricmp("xpwd", szBuf) == 0){
sprintf( szBuf, "257 \"%s\" is current directory\n", workDir);
sock_send(szBuf);
}
else if(stricmp("cwd", szBuf) == 0){
char *pPart, fullDir[MAX_PATH];
if ( GetFullPathNameA(fn, MAX_PATH, fullDir, &pPart)==0 ) {
sock_send("550 Invalid path\n");
continue;
}
if ( strncmp(rootDir, fullDir, strlen(rootDir))!=0 ) {
sock_send("550 Invalid path\n");
continue;
}
if ( !is_directory( fullDir ) ) {
sock_send("550 No such directory\n");
continue;
}
sock_send("250 CWD sucessful\n");
strcpy(workDir, fullDir+strlen(rootDir));
}
else if(stricmp("cdup", szBuf) == 0) {
char *p = strrchr(workDir, '\\');
if( p!=NULL && p!=workDir ) {
*p = 0;
sock_send("250 CWD sucessful\n");
}
else
sock_send("550 Invalid path\n");
}
else if(stricmp("pasv", szBuf)==0 || stricmp("epsv", szBuf)==0 ){
getsockname(ftp_s1, (struct sockaddr *)&svraddr, &addrsize);
svraddr.sin_port = 0;
s3 = socket(AF_INET, SOCK_STREAM, 0);
bind(s3, (struct sockaddr *)&svraddr, addrsize);
listen(s3, 1);
getsockname(s3, (struct sockaddr *)&svraddr, &addrsize);
dwIp = svraddr.sin_addr.s_addr;
wPort = svraddr.sin_port;
if ( *szBuf=='p' || *szBuf=='P' ) {
ii[1]=HIWORD(dwIp); ii[0]=LOWORD(dwIp);
c[1]=HIBYTE(ii[0]); c[0]=LOBYTE(ii[0]);
c[3]=HIBYTE(ii[1]); c[2]=LOBYTE(ii[1]);
c[5]=HIBYTE(wPort); c[4]=LOBYTE(wPort);
sprintf(szBuf, "227 PASV Mode (%d,%d,%d,%d,%d,%d)\n",
c[0], c[1], c[2], c[3], c[4], c[5]);
}
else sprintf(szBuf, "229 EPSV Mode (|||%d|)\n", ntohs(wPort));
sock_send(szBuf);
bPassive=TRUE;
}
else if( stricmp("nlst", szBuf)==0 || stricmp("list", szBuf)==0 ){
struct _finddata_t ffblk;
if ( *(param+strlen(param)-1)=='/') strcat(fn, "*.*");
if ( *param==0 ) strcat(fn, "\\*.*");
intptr_t hFile = _findfirst(fn, &ffblk);
if ( hFile==-1 ) {
sock_send("550 No such file or directory\n");
continue;
}
sock_send("150 Opening ASCII connection for list\n");
if ( bPassive ) {
s2 = accept(s3, (struct sockaddr*)&clientaddr, &addrsize);
}
else {
s2 = socket(AF_INET, SOCK_STREAM, 0);
connect(s2, (struct sockaddr*)&clientaddr,
sizeof(clientaddr));
}
BOOL bNlst = szBuf[0]=='n' || szBuf[0]=='N';
do {
if ( ffblk.name[0]=='.' ) continue;
if ( bNlst ) {
sprintf(szBuf, "%s\r\n", ffblk.name);
}
else {
char buf[256];
strcpy(buf, ctime(&ffblk.time_write));
buf[24]=0;
if ( ffblk.attrib&_A_SUBDIR )
sprintf(szBuf, "%s %s %s\r\n", buf+4,
" <DIR>", ffblk.name);
else
sprintf(szBuf, "%s % 12ld %s\r\n", buf+4,
ffblk.size, ffblk.name);
}
send(s2, szBuf, strlen(szBuf), 0);
} while ( _findnext(hFile, &ffblk)==0);
_findclose(hFile);
sock_send("226 Transfer complete.\n");
closesocket(s2);
}
else if(stricmp("stor", szBuf) == 0){
fp = NULL;
if ( strstr(param, ".." )==NULL )
fp = fopen_utf8(fn, "wb");
if(fp == NULL){
sock_send("550 Unable write file\n");
continue;
}
sock_send("150 Opening BINARY data connection\n");
if ( bPassive ) {
s2 = accept(s3, (struct sockaddr*)&clientaddr, &addrsize);
}
else {
s2 = socket(AF_INET, SOCK_STREAM, 0);
connect(s2, (struct sockaddr *)&clientaddr,
sizeof(clientaddr));
}
unsigned long lSize = 0;
unsigned int nLen=0, nCnt=0;
do {
nLen = recv(s2, szBuf, 32768, 0);
if ( nLen>0 ) {
lSize += nLen;
fwrite(szBuf, nLen, 1, fp);
}
if ( ++nCnt==256 ) {
term_Print(pt, "\r%lu bytes received", lSize);
nCnt = 0;
}
}while ( nLen!=0);
fclose(fp);
term_Print(pt, "\r%lu bytes received\n", lSize);
sock_send("226 Transfer complete\n");
closesocket(s2);
}
else if(stricmp("retr", szBuf) == 0){
fp = NULL;
if ( strstr(param, ".." )==NULL )
fp = fopen_utf8(fn, "rb");
if(fp == NULL) {
sock_send("550 Unable to read file\n");
continue;
}
sock_send("150 Opening BINARY data connection\n");
if ( bPassive ) {
s2 = accept(s3, (struct sockaddr*)&clientaddr, &addrsize);
}
else {
s2 = socket(AF_INET, SOCK_STREAM, 0);
connect(s2, (struct sockaddr *)&clientaddr,
sizeof(clientaddr));
}
unsigned long lSize = 0;
unsigned int nLen=0, nCnt=0;
do {
nLen = fread(szBuf, 1, 32768, fp);
if ( send(s2, szBuf, nLen, 0) == 0) break;
lSize += nLen;
if ( ++nCnt==32 ) {
term_Print(pt, "\r%lu bytes sent", lSize);
nCnt = 0;
}
}
while ( nLen==32768);
fclose(fp);
term_Print(pt, "\r%lu bytes sent\n", lSize);
sock_send("226 Transfer complete\n");
closesocket(s2);
}
else if(stricmp("size", szBuf) == 0){
struct _finddata_t ffblk;
intptr_t hFile = _findfirst(fn, &ffblk);
if ( hFile!=-1 )
{
sprintf(szBuf, "213 %lu\n", ffblk.size);
sock_send(szBuf);
_findclose(hFile);
}
else
sock_send("550 No such file or directory\n");
}
else if(stricmp("mdtm", szBuf) == 0) {
struct _finddata_t ffblk;
intptr_t hFile = _findfirst(fn, &ffblk);
if ( hFile!=-1 )
{
struct tm *t_mod = localtime( &ffblk.time_write);
sprintf(szBuf, "213 %4d%02d%02d%02d%02d%02d\n",
t_mod->tm_year+1900, t_mod->tm_mon+1,
t_mod->tm_mday, t_mod->tm_hour,
t_mod->tm_min, t_mod->tm_sec);
sock_send(szBuf);
_findclose(hFile);
}
else
sock_send("550 No such file or directory\n");
}
else if(stricmp("quit", szBuf) == 0){
sock_send("221 Bye!\n");
break;
}
else {
sock_send("500 Command not supported\n");
}
}
if( ret1 == 0 ) {
sock_send("500 Timeout\n");
term_Disp(pt, "FTPd: client timed out\n");
}
closesocket(ftp_s1);
}
term_Disp(pt, ret0==0? "FTPd timed out\n" : "FTPd stopped\n");
closesocket(ftp_s0);
ftp_s0 = INVALID_SOCKET;
ftpd_quit();
return 0;
}
BOOL ftp_Svr(char *root)
{
if ( root==NULL ) {
if ( ftp_s0 != INVALID_SOCKET ) {
closesocket(ftp_s1);
closesocket(ftp_s0);
ftp_s0 = INVALID_SOCKET;
}
}
else {
if ( is_directory( root ) ) {
struct sockaddr_in serveraddr;
int addrsize=sizeof(serveraddr);
ftp_s0 = socket(AF_INET, SOCK_STREAM, 0);
memset(&serveraddr, 0, addrsize);
serveraddr.sin_family=AF_INET;
serveraddr.sin_addr.s_addr=ADDR_ANY;
serveraddr.sin_port=htons(21);
if ( bind(ftp_s0, (struct sockaddr*)&serveraddr,
addrsize) != SOCKET_ERROR ) {
if ( listen(ftp_s0, 1) != SOCKET_ERROR ) {
DWORD dwId;
CreateThread( NULL, 0, ftpd, (LPVOID)root, 0, &dwId);
return TRUE;
}
}
else
term_Disp(pt, "FTPD: Couldn't bind to TCP port 21\n");
}
}
return FALSE;
}
static SOCKET tftp_s0=INVALID_SOCKET, tftp_s1;
void tftp_Read( FILE *fp )
{
char dataBuf[516], ackBuf[516];
unsigned short nCnt, nRetry=0;
int nLen, len;
nCnt=1;
len = nLen = fread(dataBuf+4, 1, 512 , fp);
do {
dataBuf[0]=0; dataBuf[1]=3;
dataBuf[2]=(nCnt>>8)&0xff; dataBuf[3]=nCnt&0xff;
send(tftp_s1, dataBuf, nLen+4, 0);
if ( nCnt%512==0 ) term_Disp(pt, "#");
if ( sock_select( tftp_s1, 5 ) == 1 ) {
if ( recv(tftp_s1, ackBuf, 516, 0)==SOCKET_ERROR ) break;
if ( ackBuf[1]==4 && ackBuf[2]==dataBuf[2] &&
ackBuf[3]==dataBuf[3]) {
nRetry=0;
nCnt++;
len = nLen;
nLen = fread(dataBuf+4, 1, 512 , fp);
}
else if ( ++nRetry==5 ) break;
}