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ssh2.c
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ssh2.c
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//
// "$Id: ssh2.c 41206 2020-09-15 12:05:10 $"
//
// tinyTerm -- A minimal serail/telnet/ssh/sftp terminal emulator
//
// ssh2.c is the host communication implementation for
// ssh/sftp/netconf based on libssh2-1.9.0
//
// 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 <time.h>
#include <fcntl.h>
#include <direct.h>
#include <shlwapi.h>
int fnmatch(char *pattern, char *file, int flag)
{
return PathMatchSpecA(file, pattern) ? 0 : 1;
}
/****************************************************************************
* local dirent implementation for compiling on vs2017
****************************************************************************/
#define DT_UNKNOWN 0
#define DT_DIR 1
#define DT_REG 2
#define DT_LNK 3
struct dirent {
unsigned char d_type;
char d_name[MAX_PATH*3];
};
typedef struct tagDIR {
struct dirent dd_dir;
HANDLE dd_handle;
int dd_stat;
} DIR;
static void finddata2dirent(struct dirent *ent, WIN32_FIND_DATA *fdata)
{
wchar_to_utf8(fdata->cFileName, -1, ent->d_name, sizeof(ent->d_name));
if (fdata->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
ent->d_type = DT_DIR;
else
ent->d_type = DT_REG;
}
DIR *opendir(const char *name)
{
WCHAR pattern[MAX_PATH + 2];
int len = utf8_to_wchar(name, -1, pattern, MAX_PATH+2);
if ( len < 0) return NULL;
if ( len && pattern[len - 1]!=L'/' ) wcscat(pattern, L"\\");
wcscat(pattern, L"*.*");
WIN32_FIND_DATA fdata;
HANDLE h = FindFirstFile(pattern, &fdata);
if ( h == INVALID_HANDLE_VALUE ) return NULL;
DIR *dir = (DIR *)malloc(sizeof(DIR));
dir->dd_handle = h;
dir->dd_stat = 0;
finddata2dirent(&dir->dd_dir, &fdata);
return dir;
}
struct dirent *readdir(DIR *dir)
{
if (!dir) return NULL;
if (dir->dd_stat) {
WIN32_FIND_DATA fdata;
if (FindNextFile(dir->dd_handle, &fdata))
finddata2dirent(&dir->dd_dir, &fdata);
else
return NULL;
}
++dir->dd_stat;
return &dir->dd_dir;
}
int closedir(DIR *dir)
{
if (dir) {
FindClose(dir->dd_handle);
free(dir);
}
return 0;
}
/******************************************************************************/
void ssh2_Construct(HOST *ph)
{
ph->session = NULL;
ph->channel =NULL;
ph->sftp = NULL;
ph->bReturn = TRUE;
ph->mtx = CreateMutex(NULL, FALSE, L"channel mutex");
ph->tunnel_list = NULL;
ph->mtx_tun = CreateMutex(NULL, FALSE, L"tunnel mutex");
*ph->homedir = 0;
const char *home = getenv("USERPROFILE");
if ( home!=NULL ) {
strcpy(ph->homedir, home);
strcat(ph->homedir, "/.ssh/");
}
}
int ssh_wait_socket(HOST *ph)
{
TIMEVAL tv = {0, 100000};
fd_set fds, *rfd=NULL, *wfd=NULL;
FD_ZERO(&fds); FD_SET(ph->sock, &fds);
int dir = libssh2_session_block_directions(ph->session);
if ( dir==0 ) return 1;
if ( dir & LIBSSH2_SESSION_BLOCK_INBOUND ) rfd = &fds;
if ( dir & LIBSSH2_SESSION_BLOCK_OUTBOUND ) wfd = &fds;
return select(ph->sock+1, rfd, wfd, NULL, &tv);
}
char *ssh2_Gets(HOST *ph, char *prompt, BOOL bEcho)
{
term_Disp(ph->term, prompt);
ph->bPassword=!bEcho;
ph->bReturn=FALSE;
ph->bGets=TRUE;
ph->keys[0]=0;
ph->cursor=0;
int old_cursor=0;
for ( int i=0; i<600&&ph->bGets&&(!ph->bReturn); i++ ) {
if ( ph->cursor>old_cursor ) {
old_cursor=ph->cursor;
i=0;
}
Sleep(100);
}
if ( ph->bReturn ) {
term_Disp(ph->term, "\r\n");
return ph->keys;
}
else
return NULL;
}
void ssh2_Send(HOST *ph, char *buf, int len)
{
if ( !ph->bReturn ) {
for ( char *p=buf; p<buf+len; p++ ) switch( *p ) {
case '\015':ph->keys[ph->cursor]=0;
ph->bReturn=TRUE;
break;
case '\010':
case '\177':if ( --ph->cursor<0 )
ph->cursor=0;
else
if ( !ph->bPassword ) term_Disp(ph->term, "\010 \010");
break;
default: ph->keys[ph->cursor++]=*p;
if ( ph->cursor>255 ) ph->cursor=255;
if ( !ph->bPassword ) term_Parse(ph->term, p, 1);
}
}
else if ( ph->channel!=NULL ) {
int total=0, cch=0;
while ( total<len ) {
if ( WaitForSingleObject(ph->mtx, INFINITE)!=WAIT_OBJECT_0 ) break;
cch=libssh2_channel_write(ph->channel, buf+total, len-total);
ReleaseMutex(ph->mtx);
if ( cch>=0 )
total += cch;
else
if ( cch!=LIBSSH2_ERROR_EAGAIN || ssh_wait_socket(ph)<0 ) break;
}
}
}
void ssh2_Size(HOST *ph, int w, int h)
{
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
if ( ph->channel!=NULL )
libssh2_channel_request_pty_size(ph->channel, w, h);
ReleaseMutex(ph->mtx);
}
}
void ssh2_Close(HOST *ph )
{
ph->bGets = FALSE;
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
if ( ph->channel!=NULL )
libssh2_channel_send_eof(ph->channel);
if ( ph->session!=NULL )
libssh2_session_disconnect(ph->session, "disconn");
ReleaseMutex(ph->mtx);
}
}
void tun_closeall(HOST *ph);
const char *keytypes[]={"unknown", "rsa", "dss", "ecdsa256",
"ecdsa384", "ecdsa521", "ed25519"};
int ssh_parameters( HOST *ph, char *p )
{
ph->username = ph->password = ph->passphrase = NULL;
ph->hostname = ph->subsystem = NULL;
while ( (p!=NULL) && (*p!=0) ) {
while ( *p==' ' ) p++;
if ( *p=='-' ) {
switch ( p[1] ) {
case 'l': p+=3; ph->username = p; break;
case 'p': if ( p[2]=='w' ) { p+=4; ph->password = p; }
if ( p[2]=='p' ) { p+=4; ph->passphrase = p; }
break;
case 'P': p+=3; ph->port = atoi(p); break;
case 's': p+=3; ph->subsystem = p; break;
}
p = strchr( p, ' ');
if ( p!=NULL ) *p++ = 0;
}
else {
if (*p ) ph->hostname = p;
break;
}
}
if ( ph->username==NULL && ph->hostname!=NULL ) {
p = strchr(ph->hostname, '@');
if ( p!=NULL ) {
ph->username = ph->hostname;
ph->hostname = p+1;
*p=0;
}
}
if ( ph->hostname==NULL ) {
term_Disp(ph->term, "hostname or ip required!\r\n");
return -1;
}
p = strchr(ph->hostname, ':');
char *q = strrchr(ph->hostname, ':');
if ( p!=NULL && p==q ) {
*p = 0;
ph->port = atoi(p+1);
}
return 0;
}
int ssh_knownhost(HOST *ph)
{
int rc = -4;
int type, check, buff_len;
size_t len;
char knownhostfile[MAX_PATH];
strcpy(knownhostfile, ph->homedir);
struct stat sb;
if ( stat(knownhostfile, &sb)!=0 ) mkdir(knownhostfile);
strcat(knownhostfile, "known_hosts");
char keybuf[256];
const char *key = libssh2_session_hostkey(ph->session, &len, &type);
if ( key==NULL ) {
term_Disp(ph->term, "hostkey ");
return rc;
}
buff_len=sprintf(keybuf, "%s key fingerprint", keytypes[type]);
if ( type>0 ) type++;
const char *fingerprint;
fingerprint = libssh2_hostkey_hash(ph->session, LIBSSH2_HOSTKEY_HASH_SHA1);
if ( fingerprint!=NULL ) for(int i = 0; i < 20; i++) {
sprintf(keybuf+buff_len+i*3, ":%02x", (unsigned char)fingerprint[i]);
}
LIBSSH2_KNOWNHOSTS *nh = libssh2_knownhost_init(ph->session);
if ( nh==NULL ) {
term_Disp(ph->term, "known_hosts init");
return rc;
}
if ( libssh2_knownhost_readfile(nh, knownhostfile,
LIBSSH2_KNOWNHOST_FILE_OPENSSH)<0 ) {
term_Disp(ph->term, "known_hosts read");
return rc;
};
struct libssh2_knownhost *knownhost;
check = libssh2_knownhost_check(nh, ph->hostname, key, len,
LIBSSH2_KNOWNHOST_TYPE_PLAIN|
LIBSSH2_KNOWNHOST_KEYENC_RAW, &knownhost);
char *p = NULL;
const char *msg = "Disconnected!";
switch ( check ) {
case LIBSSH2_KNOWNHOST_CHECK_MATCH: rc=0; msg=""; break;
case LIBSSH2_KNOWNHOST_CHECK_MISMATCH:
if ( type==((knownhost->typemask&LIBSSH2_KNOWNHOST_KEY_MASK)
>>LIBSSH2_KNOWNHOST_KEY_SHIFT) ) {
term_Print(ph->term, "%s\r\n\033[31m!!!hostkey changed!!!\r\n",
keybuf);
p=ssh2_Gets(ph, "Update hostkey and continue?(Yes/No):", TRUE);
if ( p==NULL ) {
term_Print(ph->term, "\r\n");
break;
}
if ( *p!='y' && *p!='Y' ) break;
libssh2_knownhost_del(nh, knownhost);//delete old hostkey
msg = "\033[32mhostkey updated";
}
//fall through if hostkey type different, or to update hostkey
case LIBSSH2_KNOWNHOST_CHECK_NOTFOUND:
if ( p == NULL ) {
term_Print(ph->term, "%s\r\n\033[33mhostkey unknown!", keybuf);
p = ssh2_Gets( ph, "Add to .ssh/known_hosts?(Yes/No):", TRUE);
}
if ( p==NULL ) {
term_Print(ph->term, "\r\n");
break;
}
if ( *p!='y' && *p!='Y' ) break;
rc = 0;
libssh2_knownhost_addc(nh, ph->hostname, "", key,
len,"**tinyTerm**", 12,
LIBSSH2_KNOWNHOST_TYPE_PLAIN|
LIBSSH2_KNOWNHOST_KEYENC_RAW|
(type<<LIBSSH2_KNOWNHOST_KEY_SHIFT),
&knownhost);
if ( libssh2_knownhost_writefile(nh, knownhostfile,
LIBSSH2_KNOWNHOST_FILE_OPENSSH)==0 ) {
if ( *msg=='D' ) msg = "\033[32mhostkey added";
}
else
msg = "\033[33mfailed to update hostkey file";
}
term_Print(ph->term, "%s\r\n", msg);
libssh2_knownhost_free(nh);
return rc;
}
static void kbd_callback(const char *name, int name_len,
const char *instruction, int instruction_len,
int num_prompts,
const LIBSSH2_USERAUTH_KBDINT_PROMPT *prompts,
LIBSSH2_USERAUTH_KBDINT_RESPONSE *responses,
void **abstract)
{
for ( int i=0; i<num_prompts; i++) {
char *prompt = strdup(prompts[i].text);
prompt[prompts[i].length] = 0;
const char *p = tiny_Gets(prompt, prompts[i].echo);
free(prompt);
if ( p!=NULL ) {
responses[i].text = strdup(p);
responses[i].length = strlen(p);
}
}
}
int ssh_authentication(HOST *ph)
{
char user[256], pw[256];
if ( ph->username==NULL ) {
char *p = ssh2_Gets( ph, "\r\nusername: ", TRUE);
if ( p==NULL ) return -5;
if ( *p==0 ) return -5;
strcpy(user, p);
ph->username = user;
}
char *authlist =
libssh2_userauth_list(ph->session,ph->username,strlen(ph->username));
if ( authlist==NULL ) return 0; //null authentication
if ( strstr(authlist, "publickey")!=NULL ) { // try public key
char pubkeyfile[MAX_PATH], privkeyfile[MAX_PATH];
strcpy(pubkeyfile, ph->homedir);
strcat(pubkeyfile, "id_rsa.pub");
strcpy(privkeyfile, ph->homedir);
strcat(privkeyfile, "id_rsa");
struct stat buf;
if ( stat(pubkeyfile, &buf)==0 && stat(privkeyfile, &buf)==0 ) {
if ( !libssh2_userauth_publickey_fromfile(ph->session,
ph->username, pubkeyfile, privkeyfile, ph->passphrase) ) {
term_Print(ph->term,
"\033[32mpublic key(RSA) authentication\r\n");
return 0;
}
}
}
if ( strstr(authlist, "password")!=NULL ) {
for ( int rep=0; rep<3; rep++ ) {
if ( ph->password==NULL ) {
char *p = ssh2_Gets( ph, "password: ", FALSE);
if ( p==NULL ) continue;
strcpy(pw, p);
ph->password = pw;
}
if ( !libssh2_userauth_password(ph->session, ph->username,
ph->password) ) {
return 0;
}
ph->password=NULL;
}
return -5; //waited 3 times, no password input
}
else if ( strstr(authlist, "keyboard-interactive")!=NULL ) {
for ( int i=0; i<3; i++ )
if (!libssh2_userauth_keyboard_interactive(ph->session,
ph->username,
&kbd_callback) ) {
term_Print(ph->term,
"\033[32mkeyboard-interactive authentication\r\n");
return 0;
}
}
return -5;
}
const char *IETF_HELLO="<?xml version=\"1.0\" encoding=\"UTF-8\"?>\
<hello xmlns=\"urn:ietf:params:xml:ns:netconf:base:1.0\">\
<capabilities><capability>urn:ietf:params:netconf:base:1.0</capability>\
</capabilities></hello>]]>]]>";
DWORD WINAPI ssh(void *pv)
{
int rc=0;
HOST *ph = (HOST *)pv;
char port[256];
strcpy( port, ph->cmdline+4);
ph->port = 22;
if ( strstr(port, "-s netconf")!=NULL ) ph->port = 830;
if ( ssh_parameters( ph, port )<0 ) goto TCP_Close;
ph->type = (ph->subsystem==NULL ) ? SSH : NETCONF;
ph->status=CONNECTING;
term_Title(ph->term, ph->hostname);
if ( host_tcp(ph)==-1 ) goto TCP_Close;
ph->session = libssh2_session_init();
if ( ph->session!=NULL ) {
while ( (rc=libssh2_session_handshake(ph->session, ph->sock))
==LIBSSH2_ERROR_EAGAIN );
}
if ( rc!=0 || ph->session==NULL ) {
term_Error(ph->term, "session failure");
goto Session_Close;
}
const char *banner = libssh2_session_banner_get(ph->session);
if ( banner!=NULL ) {
term_Disp(ph->term, "\r\n");
term_Disp(ph->term, banner);
}
ph->status=AUTHENTICATING;
if ( ssh_knownhost( ph )<0 ) {
term_Error(ph->term, "verification failure");
goto Session_Close;
}
if ( ssh_authentication( ph )<0 ) {
term_Error(ph->term,"authentication failure");
goto Session_Close;
}
ph->channel = libssh2_channel_open_session(ph->session);
if ( !ph->channel ) {
term_Error(ph->term, "channel failure");
goto Session_Close;
}
if ( ph->subsystem==NULL ) {
if (libssh2_channel_request_pty(ph->channel, "xterm")) {
term_Error(ph->term, "pty failure");
goto Channel_Close;
}
if (libssh2_channel_shell(ph->channel)) {
term_Error(ph->term, "shell failure");
goto Channel_Close;
}
}
else {
if (libssh2_channel_subsystem(ph->channel, ph->subsystem)) {
term_Error(ph->term, "subsystem failure");
goto Channel_Close;
}
libssh2_channel_write(ph->channel, IETF_HELLO, strlen(IETF_HELLO));
}
libssh2_session_set_blocking(ph->session, 0);
ph->status=CONNECTED;
term_Title(ph->term, ph->hostname);
while ( libssh2_channel_eof(ph->channel)==0 ) {
char buf[32768];
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
int cch=libssh2_channel_read(ph->channel, buf, 32768);
ReleaseMutex(ph->mtx);
if ( cch >= 0 ) {
if ( ph->subsystem==NULL )
term_Parse(ph->term, buf, cch);
else
term_Parse_XML(ph->term, buf, cch);
}
else {
if ( cch!=LIBSSH2_ERROR_EAGAIN || ssh_wait_socket( ph )<0 )
break;
}
}
}
tun_closeall( ph);
ph->type = NONE;
term_Error(ph->term, "Disconnected");
Channel_Close:
if ( ph->channel!=NULL ) {
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
libssh2_channel_close(ph->channel);
ReleaseMutex(ph->mtx);
}
ph->channel = NULL;
}
Session_Close:
if ( ph->session!=NULL ) {
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
libssh2_session_free(ph->session);
ReleaseMutex(ph->mtx);
}
ph->session = NULL;
}
closesocket(ph->sock);
ph->sock = 0;
TCP_Close:
ph->status=IDLE;
term_Title(ph->term, "");
return 1;
}
void print_total(TERM *pt, time_t start, long total)
{
double duration = difftime(time(NULL), start);
term_Print(pt, "\033[12D%ld bytes", total);
if ( duration>0 )
term_Print(pt, ", %dMB/s", (int)((total>>20)/duration));
}
int scp_read_one(HOST *ph, const char *rpath, const char *lpath)
{
LIBSSH2_CHANNEL *scp_channel;
libssh2_struct_stat fileinfo;
term_Print(ph->term, "\r\n\033[32mscp: %s\t\t\t", lpath);
int err_no=0;
do {
WaitForSingleObject(ph->mtx, INFINITE);
scp_channel = libssh2_scp_recv2(ph->session, rpath, &fileinfo);
if ( !scp_channel ) err_no = libssh2_session_last_errno(ph->session);
ReleaseMutex(ph->mtx);
if (!scp_channel) {
if ( err_no!=LIBSSH2_ERROR_EAGAIN || ssh_wait_socket(ph)<0 ) {
term_Print(ph->term,"\033[31mcouldn't open remote file");
return -1;
}
}
} while (!scp_channel);
FILE *fp = fopen_utf8(lpath, "wb");
if ( fp==NULL ) {
term_Print(ph->term, "\033[31mcouldn't write to local file");
goto Close;
}
int blocks = 0;
time_t start = time(NULL);
libssh2_struct_stat_size total = 0;
libssh2_struct_stat_size fsize = fileinfo.st_size;
while ( total<fsize ) {
char mem[1024*32];
int amount=sizeof(mem);
if ( (fsize-total) < amount) {
amount = (int)(fsize-total);
}
int rc = 0;
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
rc = libssh2_channel_read(scp_channel, mem, amount);
ReleaseMutex(ph->mtx);
}
if ( rc==0 ) continue;
if ( rc>0) {
int nwrite = fwrite(mem, 1, rc, fp);
if ( nwrite>0 ) {
total += nwrite;
if ( ++blocks==32 ) {
blocks = 0;
term_Print(ph->term, "\033[12D% 10lldKB", total>>10);
}
}
if ( nwrite!=rc ) {
term_Print(ph->term, ", \033[31merror writing to file");
break;
}
}
else {
if ( rc!=LIBSSH2_ERROR_EAGAIN || ssh_wait_socket(ph)<0 ) {
term_Print(ph->term, ", \033[31merror reading from host");
break;
}
}
}
fclose(fp);
if ( total==fsize ) print_total(ph->term, start, total);
Close:
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
libssh2_channel_close(scp_channel);
libssh2_channel_free(scp_channel);
ReleaseMutex(ph->mtx);
}
return 0;
}
int scp_write_one(HOST *ph, const char *lpath, const char *rpath)
{
LIBSSH2_CHANNEL *scp_channel;
struct _stat fileinfo;
term_Print(ph->term, "\r\n\033[32mscp: %s\t\t\t", rpath);
FILE *fp =fopen_utf8(lpath, "rb");
if ( !fp ) {
term_Print(ph->term, "\033[31mcouldn't read local file");
return -1;
}
stat_utf8(lpath, &fileinfo);
int err_no = 0;
do {
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
scp_channel = libssh2_scp_send(ph->session, rpath,
fileinfo.st_mode&0777, (unsigned long)fileinfo.st_size);
if ( !scp_channel ) err_no = libssh2_session_last_errno(ph->session);
ReleaseMutex(ph->mtx);
}
if ( !scp_channel ) {
if ( err_no!=LIBSSH2_ERROR_EAGAIN || ssh_wait_socket(ph)<0 ) {
term_Print(ph->term, "\033[31mcouldn't create remote file");
fclose(fp);
return -2;
}
}
} while ( !scp_channel);
char mem[1024*32];
time_t start=time(NULL);
size_t nread=0;
long total=0;
int blocks=0;
while ( (nread=fread(mem, 1, sizeof(mem), fp)) >0 ) {
char *ptr = mem;
int rc = 0;
while ( nread>0 ) {
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
rc = libssh2_channel_write(scp_channel, ptr, nread);
ReleaseMutex(ph->mtx);
}
if ( rc>0 ) {
ptr += rc;
nread -= rc;
total += rc;
}
else {
if ( rc!=LIBSSH2_ERROR_EAGAIN || ssh_wait_socket(ph)<0 ) break;
}
}
if ( rc>0 ) {
if ( ++blocks==32 ) {
blocks = 0;
term_Print(ph->term, "\033[12D% 10ldKB", total>>10);
}
}
else {
term_Print(ph->term, ", \033[31merror writing to host");
break;
}
}
if ( nread==0 ) //end of file
print_total(ph->term, start, total);
fclose(fp);
int rc;
do {
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
rc = libssh2_channel_send_eof(scp_channel);
ReleaseMutex(ph->mtx);
}
} while (rc==LIBSSH2_ERROR_EAGAIN);
do {
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
rc = libssh2_channel_wait_eof(scp_channel);
ReleaseMutex(ph->mtx);
}
} while (rc==LIBSSH2_ERROR_EAGAIN);
do {
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
rc = libssh2_channel_wait_closed(scp_channel);
ReleaseMutex(ph->mtx);
}
} while (rc==LIBSSH2_ERROR_EAGAIN);
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
libssh2_channel_close(scp_channel);
libssh2_channel_free(scp_channel);
ReleaseMutex(ph->mtx);
}
return 0;
}
void scp_read(HOST *ph, char *lpath, char *rfiles)
{
char lfile[4096];
strncpy(lfile, lpath, 1024);
lfile[1024] = 0;
struct _stat statbuf;
if ( stat_utf8(lpath, &statbuf)!=-1 ) {
if ( (statbuf.st_mode & S_IFMT) == S_IFDIR )
strcat(lfile, "/");
}
char *ldir = lfile+strlen(lfile);
char *p1, *p2, *p = rfiles;
while ( (p1=strchr(p, '\012'))!=NULL ) {
*p1++ = 0;
if ( ldir[-1]=='/' ) { //lpath is a directory
p2 = strrchr(p, '/');
if ( p2==NULL ) p2=p; else p2++;
strcpy(ldir, p2);
}
scp_read_one( ph, p, lfile);
p = p1;
*ldir = 0;
}
}
void scp_write(HOST *ph, char *lpath, char *rpath)
{
DIR *dir;
struct dirent *dp;
struct _stat statbuf;
if ( stat_utf8(lpath, &statbuf)!=-1 ) { //lpath exist
char rfile[4096];
strncpy(rfile, rpath, 1024);
rfile[1024] = 0;
if ( rpath[strlen(rpath)-1]=='/' ) {//rpath specifies a directory
char *p = strrchr(lpath, '/'); //build rfile
if ( p==NULL ) p=lpath; else p++;
strcat(rfile, p);
}
scp_write_one( ph, lpath, rfile);
}
else { //lpath specifies a pattern
char *ldir=".";
char *lpattern = strrchr(lpath, '/');
if ( lpattern!=NULL ) {
*lpattern++ = 0;
if ( *lpath ) ldir = lpath;
}
else
lpattern = lpath;
int cnt = 0;
if ( (dir=opendir(ldir) ) != NULL ) {
while ( (dp=readdir(dir)) != NULL ) {
if ( dp->d_type!=DT_REG ) continue;
if ( fnmatch(lpattern, dp->d_name, 0)==0 ) {
cnt++;
char lfile[1024], rfile[1024];
strcpy(lfile, ldir);
strcat(lfile, "/");
strcat(lfile, dp->d_name);
strcpy(rfile, rpath);
if ( rpath[strlen(rpath)-1]=='/' )
strcat(rfile, dp->d_name);
scp_write_one( ph, lfile, rfile);
}
}
closedir(dir);
}
if ( cnt==0 )
term_Print(ph->term, "\r\n\033[31mscp: %s/%s no mathcing file",
ldir, lpattern);
}
}
struct Tunnel *tun_add(HOST *ph, int tun_sock,
LIBSSH2_CHANNEL *tun_channel,
char *localip, unsigned short localport,
char *remoteip, unsigned short remoteport)
{
struct Tunnel *tun = (struct Tunnel *)malloc(sizeof(struct Tunnel));
if ( tun!=NULL ) {
tun->host = ph;
tun->socket = tun_sock;
tun->channel = tun_channel;
tun->localip = strdup(localip);
tun->localport = localport;
tun->remoteip = strdup(remoteip);
tun->remoteport = remoteport;
if ( WaitForSingleObject(ph->mtx_tun, INFINITE)==WAIT_OBJECT_0 ) {
tun->next = ph->tunnel_list;
ph->tunnel_list = tun;
ReleaseMutex(ph->mtx_tun);
}
term_Print(ph->term, "\r\n\033[32mtunnel %d %s:%d %s:%d\r\n", tun_sock,
localip, localport, remoteip, remoteport);
}
return tun;
}
void tun_del(HOST *ph, int tun_sock)
{
if ( WaitForSingleObject(ph->mtx_tun, INFINITE)==WAIT_OBJECT_0 ) {
struct Tunnel *tun_pre = NULL;
struct Tunnel *tun = ph->tunnel_list;
while ( tun!=NULL ) {
if ( tun->socket==tun_sock ) {
free(tun->localip);
free(tun->remoteip);
if ( tun_pre!=NULL )
tun_pre->next = tun->next;
else
ph->tunnel_list = tun->next;
free(tun);
term_Print(ph->term, "\r\n\033[32mtunnel %d closed\r\n", tun_sock);
break;
}
tun_pre = tun;
tun = tun->next;
}
ReleaseMutex(ph->mtx_tun);
}
}
void tun_closeall(HOST *ph)
{
if ( WaitForSingleObject(ph->mtx_tun, INFINITE)==WAIT_OBJECT_0 ) {
struct Tunnel *tun = ph->tunnel_list;
while ( tun!=NULL ) {
closesocket(tun->socket);
tun = tun->next;
}
}
ReleaseMutex(ph->mtx_tun);
}
DWORD WINAPI tun_worker(void *pv)
{
struct Tunnel *tun = (struct Tunnel *)pv;
LIBSSH2_CHANNEL *tun_channel = tun->channel;
HOST *ph = (HOST *)(tun->host);
int tun_sock = tun->socket;
char buff[16384];
while ( TRUE ) {
fd_set fds;
FD_ZERO(&fds);
FD_SET(ph->sock, &fds);
FD_SET(tun_sock, &fds);
int rc = select(tun_sock+1, &fds, NULL, NULL, NULL);//blocking call
if ( rc==-1 ) break;
if ( rc==0 ) continue;
if ( FD_ISSET(tun_sock, &fds) ) {
int len = recv(tun_sock, buff, sizeof(buff), 0);
if ( len<=0 ) break;
for ( int wr=0, i=0; wr<len; wr+=i ) {
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
i = libssh2_channel_write(tun_channel, buff+wr, len-wr);
ReleaseMutex(ph->mtx);
}
if ( i==LIBSSH2_ERROR_EAGAIN ){ i=0; continue; }
if ( i<=0 ) goto shutdown;
}
}
int len = 0;
if ( FD_ISSET(ph->sock, &fds) ) while ( TRUE ) {
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
len = libssh2_channel_read(tun_channel, buff, sizeof(buff));
ReleaseMutex(ph->mtx);
}
if ( len==LIBSSH2_ERROR_EAGAIN ) break;
if ( len<=0 ) goto shutdown;
for ( int wr=0, i=0; wr<len; wr+=i ) {
i = send(tun_sock, buff+wr, len-wr, 0);
if ( i<=0 ) break;
}
}
}
shutdown:
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
libssh2_channel_close(tun_channel);
libssh2_channel_free(tun_channel);
ReleaseMutex(ph->mtx);
}
closesocket(tun_sock);
tun_del(ph, tun_sock);
return 0;
}
DWORD WINAPI tun_local(void *pv)
{
HOST *ph = (HOST *)pv;
char *lpath, *rpath;
char *cmd = ph->tunline;
char *p = strchr(cmd, ' ');
if ( p!=NULL ) {
lpath = cmd;
rpath = p+1;
*p = 0;
}
else
return 0;
char shost[256], dhost[256], *client_host;
unsigned short sport, dport, client_port;
strncpy(shost, lpath, 255); shost[255]=0;
strncpy(dhost, rpath, 255); dhost[255]=0;
if ( (p=strchr(shost, ':'))==NULL ) return -1;
*p = 0; sport = atoi(++p);
if ( (p=strchr(dhost, ':'))==NULL ) return -1;
*p = 0; dport = atoi(++p);
struct sockaddr_in sin;
int sinlen=sizeof(sin);
struct addrinfo *ainfo;
if ( getaddrinfo(shost, NULL, NULL, &ainfo)!=0 ) {
term_Print(ph->term, "\r\n\033[31minvalid address: %s\r\n", shost);
return -1;
}
int listensock = socket(ainfo->ai_family, SOCK_STREAM, 0);
((struct sockaddr_in *)(ainfo->ai_addr))->sin_port = htons(sport);
int rc = bind(listensock, ainfo->ai_addr, ainfo->ai_addrlen);
freeaddrinfo(ainfo);
if ( rc==-1 ) {
term_Print(ph->term, "\r\n\033[31mport %d invalid or in use\r\n", sport);
closesocket(listensock);
return -1;
}
if ( listen(listensock, 2)==-1 ) {
term_Print(ph->term, "\r\n\033[31mlisten error\r\n");
closesocket(listensock);
return -1;
}
tun_add( ph, listensock, NULL, shost, sport, dhost, dport);
int tun_sock;
LIBSSH2_CHANNEL *tun_channel=NULL;
while ((tun_sock=accept(listensock,(struct sockaddr*)&sin,&sinlen))!=-1) {
client_host = inet_ntoa(sin.sin_addr);
client_port = ntohs(sin.sin_port);
do {
int rc = 0;
if ( WaitForSingleObject(ph->mtx, INFINITE)==WAIT_OBJECT_0 ) {
tun_channel = libssh2_channel_direct_tcpip_ex(ph->session,
dhost, dport, client_host, client_port);
if (!tun_channel) rc = libssh2_session_last_errno(ph->session);
ReleaseMutex(ph->mtx);
}
if ( !tun_channel ) {
if ( rc!=LIBSSH2_ERROR_EAGAIN || ssh_wait_socket(ph)<0 ) {
term_Print(ph->term, "\033[31mCouldn't tunnel, is it supported?\r\n");
closesocket(tun_sock);
goto shutdown;
}
}
} while ( !tun_channel);
void *tun = tun_add( ph, tun_sock, tun_channel,
client_host, client_port, dhost, dport);
CreateThread( NULL, 0, tun_worker, tun, 0, NULL);
}
shutdown:
closesocket(listensock);
tun_del( ph, listensock);
return 0;
}
void ssh2_Tun(HOST *ph, char *cmd)
{
if ( *cmd==' ' ) {
char *p = strchr(++cmd, ' ');
if ( p!=NULL ) { //close a tunnel
DWORD dwTunnelId; //open new tunnel
strncpy(ph->tunline, cmd, 255);
ph->tunline[255] = 0;
term_Print(ph->term, "tunnel:%s\r\n", ph->tunline);
CreateThread( NULL, 0, tun_local, ph, 0, &dwTunnelId);
Sleep(100);
}
else {
int sock = atoi(cmd);
struct Tunnel *tun = ph->tunnel_list;
while ( tun!=NULL ) {
if ( tun->socket==sock ) closesocket(sock);
tun = tun->next;
}
}
}
else { //list existing tunnels
struct Tunnel *tun = ph->tunnel_list;
int listen_cnt = 0, active_cnt = 0;
term_Print(ph->term, "\r\nTunnels:\r\n");
while ( tun!=NULL ) {
term_Print(ph->term, tun->channel==NULL?"listen":"active");
term_Print(ph->term, " socket %d\t%s:%d\t%s:%d\r\n",
tun->socket, tun->localip, tun->localport,
tun->remoteip, tun->remoteport);
if ( tun->channel!=NULL )
active_cnt++;
else
listen_cnt++;
tun = tun->next;
}
term_Print(ph->term, "\t%d listenning, %d active\r\n",
listen_cnt, active_cnt);