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htsftp.c
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2005-02-05
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/* ------------------------------------------------------------ */
/*
HTTrack Website Copier, Offline Browser for Windows and Unix
Copyright (C) Xavier Roche and other contributors
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Important notes:
- We hereby ask people using this source NOT to use it in purpose of grabbing
emails addresses, or collecting any other private information on persons.
This would disgrace our work, and spoil the many hours we spent on it.
Please visit our Website: http://www.httrack.com
*/
/* ------------------------------------------------------------ */
/* File: basic FTP protocol manager */
/* Author: Xavier Roche */
/* ------------------------------------------------------------ */
/* Internal engine bytecode */
#define HTS_INTERNAL_BYTECODE
// Gestion protocole ftp
// Version .05 (01/2000)
#include "htsftp.h"
#include "htsglobal.h"
#include "htsbase.h"
#include "htsnet.h"
#include "htsthread.h"
#if HTS_WIN
#else
//inet_ntoa
#include <arpa/inet.h>
#endif
#if HTS_WIN
#ifndef __cplusplus
// DOS
#ifndef _WIN32_WCE
#include <process.h> /* _beginthread, _endthread */
#endif
#endif
#endif
// ftp mode passif
// #if HTS_INET6==0
#define FTP_PASV 1
// #else
// no passive mode for v6
// #define FTP_PASV 0
// #endif
#define FTP_DEBUG 0
//#define FORK_DEBUG 0
#define FTP_STATUS_READY 1001
#if USE_BEGINTHREAD
PTHREAD_TYPE PTHREAD_TYPE_FNC back_launch_ftp( void* pP ) {
lien_back* back=(lien_back*) pP;
if (back == NULL) {
#if FTP_DEBUG
printf("[ftp error: no args]\n");
#endif
return PTHREAD_RETURN;
}
/* Initialize */
hts_init();
// lancer ftp
#if FTP_DEBUG
printf("[Launching main ftp routine]\n");
#endif
run_launch_ftp(back);
// prΩt
back->status=FTP_STATUS_READY;
/* Uninitialize */
hts_uninit();
return PTHREAD_RETURN;
}
// lancer en back
void launch_ftp(lien_back* back) {
// DOS
#if FTP_DEBUG
printf("[Launching main ftp thread]\n");
#endif
(void)hts_newthread(back_launch_ftp, 0, (void*) back);
}
#else
// Unix sans pthread
int back_launch_ftp(lien_back* back) {
// lancer ftp
run_launch_ftp(back);
// prΩt
back->status=FTP_STATUS_READY;
return 0;
}
void launch_ftp(lien_back* back,char* path,char* exec) {
FILE* fp = fopen(fconv(path),"wb");
if (fp) {
char _args[8][256];
char *args[8];
fclose(fp); fp=NULL;
strcpybuff(_args[0],exec);
strcpybuff(_args[1],"-#R");
strcpybuff(_args[2],back->url_adr);
strcpybuff(_args[3],back->url_fil);
strcpybuff(_args[4],back->url_sav);
strcpybuff(_args[5],path);
//strcpybuff(_args[6],"");
args[0]=_args[0];
args[1]=_args[1];
args[2]=_args[2];
args[3]=_args[3];
args[4]=_args[4];
args[5]=_args[5];
args[6]=NULL;
switch (fork()) { // note: vfork dΘconne un max'
case -1: printf("Can not vfork() process\n"); break;
case 0:
if (execvp(args[0],args)==-1) {
fp=fopen(fconv(path),"wb");
if (fp) {
fprintf(fp,"-1 unable to launch %s",args[0]);
fclose(fp); fp=NULL;
rename(path,concat(path,".ok"));
} else remove(path);
}
_exit(0); // exit 'propre'
break;
default: // parent
// bah on fait rien..
break;
}
}
}
#endif
// pour l'arrΩt du ftp
#ifdef _WIN32
#define _T_SOC_close(soc) closesocket(soc); soc=INVALID_SOCKET;
#else
#define _T_SOC_close(soc) close(soc); soc=INVALID_SOCKET;
#endif
#define _HALT_FTP { \
if ( soc_ctl != INVALID_SOCKET ) _T_SOC_close(soc_ctl); \
if ( soc_servdat != INVALID_SOCKET ) _T_SOC_close(soc_servdat); \
if ( soc_dat != INVALID_SOCKET ) _T_SOC_close(soc_dat); \
}
#define _CHECK_HALT_FTP \
if (stop_ftp(back)) { \
_HALT_FTP \
return 0; \
}
// la vΘritable fonction une fois lancΘes les routines thread/fork
int run_launch_ftp(lien_back* back) {
char user[256]="anonymous";
char pass[256]="user@";
char line_retr[2048];
int port=21;
#if FTP_PASV
int port_pasv=0;
#endif
char BIGSTK adr_ip[1024];
char *adr,*real_adr;
char* ftp_filename="";
int timeout = 300; // timeout
int timeout_onfly=8; // attente rΘponse supplΘmentaire
int transfer_list=0; // directory
int rest_understood=0; // rest command understood
t_fullhostent fullhostent_buffer; // buffer pour resolver
//
T_SOC soc_ctl=INVALID_SOCKET;
T_SOC soc_servdat=INVALID_SOCKET;
T_SOC soc_dat=INVALID_SOCKET;
//
SOCaddr server_data;
int server_data_size=sizeof(server_data);
//
line_retr[0]=adr_ip[0]='\0';
timeout=300;
// effacer
strcpybuff(back->r.msg,"");
back->r.statuscode=0;
back->r.size=0;
// rΘcupΘrer user et pass si prΘsents, et sauter user:id@ dans adr
real_adr = strchr(back->url_adr,':');
if (real_adr) real_adr++;
else real_adr=back->url_adr;
while(*real_adr=='/') real_adr++; // sauter /
if ( (adr = jump_identification(real_adr)) != real_adr) { // user
int i=-1;
pass[0]='\0';
do {
i++;
user[i]=real_adr[i];
} while( (real_adr[i]!=':') && (real_adr[i]) );
user[i]='\0';
if (real_adr[i]==':') { // pass
int j=-1;
i++; // oui on saute aussi le :
do {
j++;
pass[j]=real_adr[i+j];
} while( ((&real_adr[i+j+1]) < adr) && (real_adr[i+j]) );
pass[j]='\0';
}
}
// Calculer RETR <nom>
{
char* a;
#if 0
a=back->url_fil + strlen(back->url_fil)-1;
while( (a > back->url_fil) && (*a!='/')) a--;
if (*a != '/') {
a = NULL;
}
#else
a = back->url_fil;
#endif
if (a != NULL && *a != '\0') {
#if 0
a++; // sauter /
#endif
ftp_filename=a;
if (strnotempty(a)) {
char* ua=unescape_http(a);
int len_a = (int) strlen(ua);
if (len_a > 0 && ua[len_a -1] == '/') { /* obviously a directory listing */
transfer_list=1;
sprintf(line_retr,"LIST -A %s",ua);
} else if (
(strchr(ua, ' '))
||
(strchr(ua, '\"'))
||
(strchr(ua, '\''))
) {
sprintf(line_retr,"RETR \"%s\"",ua);
} else { /* Regular one */
sprintf(line_retr,"RETR %s",ua);
}
} else {
transfer_list=1;
sprintf(line_retr,"LIST -A");
}
} else {
strcpybuff(back->r.msg,"Unexpected PORT error");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
}
}
#if FTP_DEBUG
printf("Connecting to %s...\n",adr);
#endif
// connexion
{
SOCaddr server;
int server_size=sizeof(server);
t_hostent* hp;
char * a;
char _adr[256];
_adr[0]='\0';
//T_SOC soc_ctl;
// effacer structure
memset(&server, 0, sizeof(server));
// port
a=strchr(adr,':'); // port
if (a) {
sscanf(a+1,"%d",&port);
strncatbuff(_adr,adr,(int) (a - adr));
} else
strcpybuff(_adr,adr);
// rΘcupΘrer adresse rΘsolue
strcpybuff(back->info,"host name");
hp = hts_gethostbyname(_adr, &fullhostent_buffer);
if (hp == NULL) {
strcpybuff(back->r.msg,"Unable to get server's address");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-5;
_HALT_FTP
return 0;
}
_CHECK_HALT_FTP;
// copie adresse
SOCaddr_copyaddr(server, server_size, hp->h_addr_list[0], hp->h_length);
// copie adresse pour cnx data
SOCaddr_copyaddr(server_data, server_data_size, hp->h_addr_list[0], hp->h_length);
// memcpy(&server.sin_addr, hp->h_addr, hp->h_length);
// crΘer ("attachement") une socket (point d'accΦs) internet,en flot
soc_ctl=socket(SOCaddr_sinfamily(server), SOCK_STREAM, 0);
if (soc_ctl==INVALID_SOCKET) {
strcpybuff(back->r.msg,"Unable to create a socket");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
_HALT_FTP
return 0;
}
SOCaddr_initport(server, port);
// server.sin_port = htons((unsigned short int) port);
// connexion (bloquante, on est en thread)
strcpybuff(back->info,"connect");
#if HTS_WIN
if (connect(soc_ctl, (const struct sockaddr FAR *)&server, server_size) != 0) {
#else
if (connect(soc_ctl, (struct sockaddr *)&server, server_size) == -1) {
#endif
strcpybuff(back->r.msg,"Unable to connect to the server");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
_HALT_FTP
return 0;
#if HTS_WIN
}
#else
}
#endif
_CHECK_HALT_FTP;
{
char BIGSTK line[1024];
// envoi du login
// --USER--
get_ftp_line(soc_ctl,line,timeout); // en tΩte
_CHECK_HALT_FTP;
if (line[0]=='2') { // ok, connectΘ
strcpybuff(back->info,"login: user");
sprintf(line,"USER %s",user);
send_line(soc_ctl,line);
get_ftp_line(soc_ctl,line,timeout);
_CHECK_HALT_FTP;
if ((line[0]=='3') || (line[0]=='2')) {
// --PASS--
strcpybuff(back->info,"login: pass");
sprintf(line,"PASS %s",pass);
send_line(soc_ctl,line);
get_ftp_line(soc_ctl,line,timeout);
_CHECK_HALT_FTP;
if (line[0]=='2') { // ok
send_line(soc_ctl,"TYPE I");
get_ftp_line(soc_ctl,line,timeout);
_CHECK_HALT_FTP;
if (line[0]=='2') {
// ok
} else {
strcpybuff(back->r.msg,"TYPE I error");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
}
#if 0
// --CWD--
char* a;
a=back->url_fil + strlen(back->url_fil)-1;
while( (a > back->url_fil) && (*a!='/')) a--;
if (*a == '/') { // ok repΘrΘ
char BIGSTK target[1024];
target[0]='\0';
strncatbuff(target,back->url_fil,(int) (a - back->url_fil));
if (strnotempty(target)==0)
strcatbuff(target,"/");
strcpybuff(back->info,"cwd");
sprintf(line,"CWD %s",target);
send_line(soc_ctl,line);
get_ftp_line(soc_ctl,line,timeout);
_CHECK_HALT_FTP;
if (line[0]=='2') {
send_line(soc_ctl,"TYPE I");
get_ftp_line(soc_ctl,line,timeout);
_CHECK_HALT_FTP;
if (line[0]=='2') {
// ok..
} else {
strcpybuff(back->r.msg,"TYPE I error");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
}
} else {
sprintf(back->r.msg,"CWD error: %s",linejmp(line));
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
} // sinon on est prΩts
} else {
strcpybuff(back->r.msg,"Unexpected ftp error");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
}
#endif
} else {
sprintf(back->r.msg,"Bad password: %s",linejmp(line));
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
}
} else {
sprintf(back->r.msg,"Bad user name: %s",linejmp(line));
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
}
} else {
sprintf(back->r.msg,"Connection refused: %s",linejmp(line));
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
}
// ok, si on est prΩts on Θcoute sur un port et on demande la sauce
if (back->r.statuscode != -1) {
//
// PrΘ-REST
//
#if FTP_PASV
if (SOCaddr_getproto(server, server_size) == '1') {
strcpybuff(back->info,"pasv");
sprintf(line,"PASV");
send_line(soc_ctl,line);
get_ftp_line(soc_ctl,line,timeout);
} else { /* ipv6 */
line[0]='\0';
}
_CHECK_HALT_FTP;
if (line[0]=='2') {
char *a,*b,*c;
a=strchr(line,'('); // exemple: 227 Entering Passive Mode (123,45,67,89,177,27)
if (a) {
// -- analyse de l'adresse IP et du port --
a++;
b=strchr(a,',');
if (b) b=strchr(b+1,',');
if (b) b=strchr(b+1,',');
if (b) b=strchr(b+1,',');
c=a; while( (c=strchr(c,',')) ) *c='.'; // remplacer , par .
if (b) *b='\0';
//
strcpybuff(adr_ip,a); // copier adresse ip
//
if (b) {
a=b+1; // dΘbut du port
b=strchr(a,'.');
if (b) {
int n1,n2;
//
*b='\0';
b++;
c=strchr(b,')');
if (c) {
*c='\0';
if ( (sscanf(a,"%d",&n1)==1) && (sscanf(b,"%d",&n2)==1) && (strlen(adr_ip)<=16)) {
port_pasv=n2+(n1<<8);
}
} else {
deletesoc(soc_dat); soc_dat=INVALID_SOCKET;
} // sinon on est prΩts
}
}
// -- fin analyse de l'adresse IP et du port --
} else {
sprintf(back->r.msg,"PASV incorrect: %s",linejmp(line));
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
} // sinon on est prΩts
} else {
/*
* try epsv (ipv6) *
*/
strcpybuff(back->info,"pasv");
sprintf(line,"EPSV");
send_line(soc_ctl,line);
get_ftp_line(soc_ctl,line,timeout);
_CHECK_HALT_FTP;
if (line[0]=='2') { /* got it */
char *a;
a=strchr(line,'('); // exemple: 229 Entering Extended Passive Mode (|||6446|)
if (
(a != NULL)
&&
(*a == '(')
&& (*(a+1))
&& (*(a+1) == *(a+2)) && (*(a+1) == *(a+3))
&& (isdigit(*(a+4)))
&& (*(a+5))
) {
unsigned int n1 = 0;
if (sscanf(a+4,"%d",&n1)==1) {
if ((n1 < 65535) && (n1 > 0)) {
port_pasv=n1;
}
}
} else {
sprintf(back->r.msg,"EPSV incorrect: %s",linejmp(line));
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
}
} else {
sprintf(back->r.msg,"PASV/EPSV error: %s",linejmp(line));
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
} // sinon on est prΩts
}
#else
// rien α faire avant
#endif
#if FTP_PASV
if (port_pasv) {
#endif
// SIZE
if (back->r.statuscode != -1) {
if (!transfer_list) {
char* ua=unescape_http(ftp_filename);
if (
(strchr(ua, ' '))
||
(strchr(ua, '\"'))
||
(strchr(ua, '\''))
) {
sprintf(line,"SIZE \"%s\"", ua);
} else {
sprintf(line,"SIZE %s", ua);
}
// SIZE?
strcpybuff(back->info,"size");
send_line(soc_ctl,line);
get_ftp_line(soc_ctl,line,timeout);
_CHECK_HALT_FTP;
if (line[0]=='2') { // SIZE compris, ALORS tester REST (sinon pas tester: cf probleme des txt.gz decompresses a la volee)
char* szstr = strchr(line, ' ');
if (szstr) {
LLint size = 0;
szstr++;
if (sscanf(szstr, LLintP, &size) == 1) {
back->r.totalsize = size;
}
}
// REST?
if (fexist(back->url_sav) && (transfer_list==0)) {
strcpybuff(back->info,"rest");
sprintf(line,"REST "LLintP,(LLint)fsize(back->url_sav));
send_line(soc_ctl,line);
get_ftp_line(soc_ctl,line,timeout);
_CHECK_HALT_FTP;
if ((line[0]=='3') || (line[0]=='2')) { // ok
rest_understood=1;
} // sinon tant pis
}
} // sinon tant pis
}
}
#if FTP_PASV
}
#endif
//
// Post-REST
//
#if FTP_PASV
// Ok, se connecter
if (port_pasv) {
SOCaddr server;
int server_size=sizeof(server);
t_hostent* hp;
// effacer structure
memset(&server, 0, sizeof(server));
// infos
strcpybuff(back->info,"resolv");
// rΘsoudre
if (adr_ip[0]) {
hp = hts_gethostbyname(adr_ip, &fullhostent_buffer);
if (hp) {
SOCaddr_copyaddr(server, server_size, hp->h_addr_list[0], hp->h_length);
} else {
server_size=0;
}
} else {
memcpy(&server, &server_data, sizeof(server_data));
server_size=server_data_size;
}
// infos
strcpybuff(back->info,"cnxdata");
#if FTP_DEBUG
printf("Data: Connecting to %s:%d...\n", adr_ip, port_pasv);
#endif
if (server_size > 0) {
// socket
soc_dat=socket(SOCaddr_sinfamily(server), SOCK_STREAM, 0);
if (soc_dat != INVALID_SOCKET) {
// structure: connexion au domaine internet, port 80 (ou autre)
SOCaddr_initport(server, port_pasv);
// server.sin_port = htons((unsigned short int) port_pasv);
#if HTS_WIN
if (connect(soc_dat, (const struct sockaddr FAR *)&server, server_size) == 0) {
#else
if (connect(soc_dat, (struct sockaddr *)&server, server_size) != -1) {
#endif
strcpybuff(back->info,"retr");
strcpybuff(line,line_retr);
send_line(soc_ctl,line);
get_ftp_line(soc_ctl,line,timeout);
_CHECK_HALT_FTP;
if (line[0]=='1') {
// OK
} else {
deletesoc(soc_dat); soc_dat=INVALID_SOCKET;
//
sprintf(back->r.msg,"RETR command errror: %s",linejmp(line));
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
} // sinon on est prΩts
} else {
#if FTP_DEBUG
printf("Data: unable to connect\n");
#endif
deletesoc(soc_dat); soc_dat=INVALID_SOCKET;
//
strcpybuff(back->r.msg,"Unable to connect");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
} // sinon on est prΩts
} else {
strcpybuff(back->r.msg,"Unable to create a socket");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
} // sinon on est prΩts
} else {
sprintf(back->r.msg,"Unable to resolve IP %s",adr_ip);
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
} // sinon on est prΩts
} else {
sprintf(back->r.msg,"PASV incorrect: %s",linejmp(line));
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
} // sinon on est prΩts
#else
//T_SOC soc_servdat;
strcpybuff(back->info,"listening");
if ( (soc_servdat = get_datasocket(line)) != INVALID_SOCKET) {
_CHECK_HALT_FTP;
send_line(soc_ctl,line); // envoi du RETR
get_ftp_line(soc_ctl,line,timeout);
_CHECK_HALT_FTP;
if (line[0]=='2') { // ok
strcpybuff(back->info,"retr");
strcpybuff(line,line_retr);
send_line(soc_ctl,line);
get_ftp_line(soc_ctl,line,timeout);
_CHECK_HALT_FTP;
if (line[0]=='1') {
//T_SOC soc_dat;
struct sockaddr dummyaddr;
int dummylen = sizeof(struct sockaddr);
if ( (soc_dat=accept(soc_servdat,&dummyaddr,&dummylen)) == INVALID_SOCKET) {
strcpybuff(back->r.msg,"Unable to accept connection");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
}
} else {
sprintf(back->r.msg,"RETR command errror: %s",linejmp(line));
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
}
} else {
sprintf(back->r.msg,"PORT command error: %s",linejmp(line));
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
}
#if HTS_WIN
closesocket(soc_servdat);
#else
close(soc_servdat);
#endif
} else {
strcpybuff(back->r.msg,"Unable to listen to a port");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
}
#endif
//
// Ok, connexion initiΘe
//
if (soc_dat != INVALID_SOCKET) {
if (rest_understood) { // REST envoyΘe et comprise
filenote(back->url_sav,NULL);
back->r.fp = fopen(fconv(back->url_sav),"ab");
} else
back->r.fp = filecreate(back->url_sav);
strcpybuff(back->info,"receiving");
if (back->r.fp != NULL) {
char BIGSTK buff[1024];
int len=1;
int read_len=1024;
//HTS_TOTAL_RECV_CHECK(read_len); // Diminuer au besoin si trop de donnΘes reτues
while( (len>0) && (!stop_ftp(back)) ) {
// attendre les donnΘes
len=1; // pas d'erreur pour le moment
switch(wait_socket_receive(soc_dat,timeout)) {
case -1:
strcpybuff(back->r.msg,"FTP read error");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
len=0; // fin
break;
case 0:
sprintf(back->r.msg,"Time out (%d)",timeout);
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
len=0; // fin
break;
}
// rΘception
if (len) {
len=recv(soc_dat,buff,read_len,0);
if (len>0) {
back->r.size+=len;
HTS_STAT.HTS_TOTAL_RECV+=len;
if (back->r.fp) {
if ((INTsys)fwrite(buff,1,(INTsys)len,back->r.fp) != len) {
/*
int fcheck;
if ((fcheck=check_fatal_io_errno())) {
opt->state.exit_xh=-1;
}
*/
strcpybuff(back->r.msg,"Write error");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
len=0; // error
}
} else {
strcpybuff(back->r.msg,"Unexpected write error");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
}
} else { // Erreur ou terminΘ
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=0;
if (back->r.totalsize > 0 && back->r.size != back->r.totalsize) {
back->r.statuscode=-1;
strcpybuff(back->r.msg,"FTP file incomplete");
}
}
read_len=1024;
//HTS_TOTAL_RECV_CHECK(read_len); // Diminuer au besoin si trop de donnΘes reτues
}
}
if (back->r.fp) {
fclose(back->r.fp);
back->r.fp=NULL;
}
} else {
strcpybuff(back->r.msg,"Unable to write file");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
}
#if HTS_WIN
closesocket(soc_dat);
#else
close(soc_dat);
#endif
// 226 Transfer complete?
if (back->r.statuscode != -1) {
if (wait_socket_receive(soc_ctl,timeout_onfly)>0) {
// rΘcupΘrer 226 transfer complete
get_ftp_line(soc_ctl,line,timeout);
if (line[0]=='2') { // OK
strcpybuff(back->r.msg,"OK");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=200;
} else {
sprintf(back->r.msg,"RETR incorrect: %s",linejmp(line));
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
}
} else {
strcpybuff(back->r.msg,"FTP read error");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
}
}
}
}
}
_CHECK_HALT_FTP;
strcpybuff(back->info,"quit");
send_line(soc_ctl,"QUIT"); // bye bye
get_ftp_line(soc_ctl,NULL,timeout);
#if HTS_WIN
closesocket(soc_ctl);
#else
close(soc_ctl);
#endif
}
if (back->r.statuscode!=-1) {
back->r.statuscode=200;
strcpybuff(back->r.msg,"OK");
}
// back->status=FTP_STATUS_READY; // fini
return 0;
}
// ouverture d'un port
T_SOC get_datasocket(char* to_send) {
T_SOC soc = INVALID_SOCKET;
char h_loc[256+2];
to_send[0]='\0';
if (gethostname(h_loc,256)==0) { // host name
SOCaddr server;
int server_size=sizeof(server);
t_hostent* hp_loc;
t_fullhostent buffer;
// effacer structure
memset(&server, 0, sizeof(server));
if ( (hp_loc=vxgethostbyname(h_loc, &buffer)) ) { // notre host
// copie adresse
SOCaddr_copyaddr(server, server_size, hp_loc->h_addr_list[0], hp_loc->h_length);
if ( (soc=socket(SOCaddr_sinfamily(server), SOCK_STREAM, 0)) != INVALID_SOCKET) {
if ( bind(soc,(struct sockaddr*) &server, server_size) == 0 ) {
SOCaddr server2;
int len;
len=sizeof(server2);
// effacer structure
memset(&server2, 0, sizeof(server2));
if (getsockname(soc,(struct sockaddr*) &server2, &len) == 0) {
// *port=ntohs(server.sin_port); // rΘcupΘrer port
if (listen(soc,10)>=0) { // au pif le 10
#if HTS_INET6==0
unsigned short int a,n1,n2;
// calculer port
a = SOCaddr_sinport(server2);
n1 = (a & 0xff);
n2 = ((a>>8) & 0xff);
{
char dots[256+2];
char dot[256+2];
char* a;
SOCaddr_inetntoa(dot, 256, server2, sizeof(server2));
//
dots[0]='\0';
strncatbuff(dots, dot, 128);
while( (a=strchr(dots,'.')) ) *a=','; // virgules!
while( (a=strchr(dots,':')) ) *a=','; // virgules!
sprintf(to_send,"PORT %s,%d,%d",dots,n1,n2);
}
#else
/*
EPRT |1|132.235.1.2|6275|
EPRT |2|1080::8:800:200C:417A|5282|
*/
{
char dot[256+2];
SOCaddr_inetntoa(dot, 256, server2, len);
sprintf(to_send,"EPRT |%c|%s|%d|", SOCaddr_getproto(server2, len), dot, SOCaddr_sinport(server2));
}
#endif
} else {
#if HTS_WIN
closesocket(soc);
#else
close(soc);
#endif
soc=INVALID_SOCKET;
}
} else {
#if HTS_WIN
closesocket(soc);
#else
close(soc);
#endif
soc=INVALID_SOCKET;
}
} else {
#if HTS_WIN
closesocket(soc);
#else
close(soc);
#endif
soc=INVALID_SOCKET;
}
}
}
}
return soc;
}
#if FTP_DEBUG
FILE* dd=NULL;
#endif
// routines de rΘception/Θmission
// 0 = ERROR
int send_line(T_SOC soc,char* data) {
char BIGSTK line[1024];
if (_DEBUG_HEAD) {
if (ioinfo) {
fprintf(ioinfo,"---> %s\x0d\x0a",data);
fflush(ioinfo);
}
}
#if FTP_DEBUG
if (dd == NULL) dd = fopen("toto.txt","w");
fprintf(dd,"---> %s\x0d\x0a",data); fflush(dd);
printf("---> %s",data); fflush(stdout);
#endif
sprintf(line,"%s\x0d\x0a",data);
if (check_socket_connect(soc) != 1) {
#if FTP_DEBUG
printf("!SOC WRITE ERROR\n");
#endif
return 0; // erreur, plus connectΘ!
}
#if FTP_DEBUG
{
int r = (send(soc,line,strlen(line),0) == (int) strlen(line));
printf("%s\x0d\x0a",data); fflush(stdout);
return r;
}
#else
return (send(soc,line,strlen(line),0) == (int) strlen(line));
#endif
}
int get_ftp_line(T_SOC soc,char* line,int timeout) {
char BIGSTK data[1024];
int i,ok,multiline;
#if FTP_DEBUG
if (dd == NULL) dd = fopen("toto.txt","w");
#endif
data[0]='\0';
i=ok=multiline=0; data[3]='\0';
do {
char b;
// vΘrifier donnΘes
switch(wait_socket_receive(soc,timeout)) {
case -1: // erreur de lecture
if (line) strcpybuff(line,"500 *read error");
return 0;
break;
case 0:
if (line) sprintf(line,"500 *read timeout (%d)",timeout);
return 0;
break;
}
//HTS_TOTAL_RECV_CHECK(dummy); // Diminuer au besoin si trop de donnΘes reτues
switch(recv(soc,&b,1,0)) {
//case 0: break; // pas encore --> erreur (on attend)!
case 1:
HTS_STAT.HTS_TOTAL_RECV+=1; // compter flux entrant
if ((b!=10) && (b!=13))
data[i++]=b;
break;
default:
if (line) strcpybuff(line,"500 *read error");
return 0; // error
break;
}
if ( ((b==13) || (b==10)) && (i>0) ){ // CR/LF
if (
(data[3] == '-')
||
((multiline) && (!isdigit((unsigned char)data[0])))
)
{
data[3]='\0';
i=0;
multiline=1;
}
else
ok=1; // sortir
}
} while(!ok);
data[i++]='\0';
if (_DEBUG_HEAD) {
if (ioinfo) {
fprintf(ioinfo,"<--- %s\x0d\x0a",data);
fflush(ioinfo);
}
}
#if FTP_DEBUG
fprintf(dd,"<--- %s\n",data); fflush(dd);
printf("<--- %s\n",data);
#endif
if (line) strcpybuff(line,data);
return (strnotempty(data));
}
// sauter NNN
char* linejmp(char* line) {
if (strlen(line)>4)
return line+4;
else
return line;
}
// test socket:
// 0 : no data
// 1 : data detected
// -1: error
int check_socket(T_SOC soc) {
fd_set fds,fds_e; // poll structures
struct timeval tv; // structure for select
FD_ZERO(&fds);
FD_ZERO(&fds_e);
// socket read
FD_SET(soc,&fds);
// socket error
FD_SET(soc,&fds_e);
tv.tv_sec=0;
tv.tv_usec=0;
// poll!
select(soc + 1,&fds,NULL,&fds_e,&tv);
if (FD_ISSET(soc,&fds_e)) { // error detected
return -1;
} else if (FD_ISSET(soc,&fds)) {
return 1;
}
return 0;
}
// check if connected
int check_socket_connect(T_SOC soc) {
fd_set fds,fds_e; // poll structures
struct timeval tv; // structure for select
FD_ZERO(&fds);
FD_ZERO(&fds_e);
// socket write
FD_SET(soc,&fds);
// socket error
FD_SET(soc,&fds_e);
tv.tv_sec=0;
tv.tv_usec=0;
// poll!
select(soc + 1,NULL,&fds,&fds_e,&tv);
if (FD_ISSET(soc,&fds_e)) { // error detected
return -1;
} else if (FD_ISSET(soc,&fds)) {
return 1;
}
return 0;
}
// attendre des donnΘes
int wait_socket_receive(T_SOC soc,int timeout) {
// attendre les donnΘes
TStamp ltime=time_local();
int r;
#if FTP_DEBUG
printf("\x0dWaiting for data "); fflush(stdout);
#endif
while( (!(r = check_socket(soc))) && ( ((int) ((TStamp) (time_local()-ltime))) < timeout )) {
Sleep(100);
#if FTP_DEBUG
printf("."); fflush(stdout);
#endif
}
#if FTP_DEBUG
printf("\x0dreturn: %d\x0d",r); fflush(stdout);
#endif
return r;
}
// cancel reτu?
int stop_ftp(lien_back* back) {
if (back->stop_ftp) {
strcpybuff(back->r.msg,"Cancelled by User");
// back->status=FTP_STATUS_READY; // fini
back->r.statuscode=-1;
return 1;
}
return 0;
}