Newer
Older
}
if (!*modep) {
freeaddrinfo(res);
return CURLE_FTP_PORT_FAILED;
}
#else
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if(data->set.ftpport) {
if(Curl_if2ip(data->set.ftpport, myhost, sizeof(myhost))) {
h = Curl_gethost(data, myhost, &hostdataptr);
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if(strlen(data->set.ftpport)>1)
h = Curl_gethost(data, data->set.ftpport, &hostdataptr);
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strcpy(myhost, data->set.ftpport); /* buffer overflow risk */
h=Curl_gethost(data,
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getmyhost(myhost, sizeof(myhost)),
&hostdataptr);
}
infof(data, "We connect from %s\n", myhost);
if ( h ) {
if( (portsock = socket(AF_INET, SOCK_STREAM, 0)) >= 0 ) {
/* we set the secondary socket variable to this for now, it
is only so that the cleanup function will close it in case
we fail before the true secondary stuff is made */
conn->secondarysocket = portsock;
memset((char *)&sa, 0, sizeof(sa));
memcpy((char *)&sa.sin_addr,
h->h_addr,
h->h_length);
sa.sin_family = AF_INET;
sa.sin_addr.s_addr = INADDR_ANY;
sa.sin_port = 0;
size = sizeof(sa);
if(bind(portsock, (struct sockaddr *)&sa, size) >= 0) {
/* we succeeded to bind */
struct sockaddr_in add;
size = sizeof(add);
if(getsockname(portsock, (struct sockaddr *) &add,
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(socklen_t *)&size)<0) {
}
porttouse = ntohs(add.sin_port);
if ( listen(portsock, 1) < 0 ) {
failf(data, "listen(2) failed on socket");
}
}
else {
failf(data, "bind(2) failed on socket");
}
}
else {
failf(data, "socket(2) failed (%s)");
if(hostdataptr)
/* free the memory used for name lookup */
free(hostdataptr);
}
else {
failf(data, "could't find my own IP address (%s)", myhost);
}
{
struct in_addr in;
unsigned short ip[5];
(void) memcpy(&in.s_addr, *h->h_addr_list, sizeof (in.s_addr));
/* ignore the return code from inet_ntoa_r() as it is int or
char * depending on system */
inet_ntoa_r(in, ntoa_buf, sizeof(ntoa_buf));
sscanf( ntoa_buf, "%hu.%hu.%hu.%hu",
sscanf( inet_ntoa(in), "%hu.%hu.%hu.%hu",
&ip[0], &ip[1], &ip[2], &ip[3]);
ftpsendf(conn->firstsocket, conn, "PORT %d,%d,%d,%d,%d,%d",
ip[0], ip[1], ip[2], ip[3],
porttouse >> 8,
porttouse & 255);
}
nread = Curl_GetFTPResponse(conn->firstsocket, buf, conn, &ftpcode);
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if(nread < 0)
return CURLE_OPERATION_TIMEOUTED;
if(ftpcode != 200) {
failf(data, "Server does not grok PORT, try without it!");
/* no support for IPv6 passive mode yet */
char *mode[] = { "EPSV", "LPSV", "PASV", NULL };
int results[] = { 229, 228, 227, 0 };
#else
const char *mode[] = { "PASV", NULL };
int results[] = { 227, 0 };
#endif
int modeoff;
for (modeoff = 0; mode[modeoff]; modeoff++) {
ftpsendf(conn->firstsocket, conn, mode[modeoff]);
nread = Curl_GetFTPResponse(conn->firstsocket, buf, conn, &ftpcode);
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return CURLE_OPERATION_TIMEOUTED;
if (ftpcode == results[modeoff])
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break;
else if (strcmp(mode[modeoff], "PASV") == 0) {
unsigned short newport; /* remote port, not necessary the local one */
unsigned short connectport; /* the local port connect() should use! */
#ifdef ENABLE_IPV6
struct addrinfo *res;
#else
char *ip_addr;
#endif
char *str=buf;
/*
* New 227-parser June 3rd 1999.
* It now scans for a sequence of six comma-separated numbers and
* will take them as IP+port indicators.
*
* Found reply-strings include:
* "227 Entering Passive Mode (127,0,0,1,4,51)"
* "227 Data transfer will passively listen to 127,0,0,1,4,51"
* "227 Entering passive mode. 127,0,0,1,4,51"
*/
while(*str) {
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if (6 == sscanf(str, "%d,%d,%d,%d,%d,%d",
&ip[0], &ip[1], &ip[2], &ip[3],
&port[0], &port[1]))
break;
str++;
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failf(data, "Couldn't interpret this 227-reply: %s", buf);
return CURLE_FTP_WEIRD_227_FORMAT;
sprintf(newhost, "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
newport = (port[0]<<8) + port[1];
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if(data->change.proxy) {
/*
* This is a tunnel through a http proxy and we need to connect to the
* proxy again here. We already have the name info for it since the
* previous lookup.
*/
connectport =
(unsigned short)conn->port; /* we connect to the proxy's port */
}
else {
/* normal, direct, ftp connection */
#ifdef ENABLE_IPV6
res = Curl_getaddrinfo(data, newhost, newport);
if(!res)
#else
he = Curl_gethost(data, newhost, &hostdataptr);
if(!he)
#endif
{
failf(data, "Can't resolve new host %s", newhost);
return CURLE_FTP_CANT_GET_HOST;
}
connectport = newport; /* we connect to the remote port */
conn->secondarysocket = -1;
for (ai = res; ai; ai = ai->ai_next) {
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/* XXX for now, we can do IPv4 only */
if (ai->ai_family != AF_INET)
continue;
conn->secondarysocket = socket(ai->ai_family, ai->ai_socktype,
ai->ai_protocol);
if (conn->secondarysocket < 0)
continue;
if(data->set.verbose) {
char hbuf[NI_MAXHOST];
char nbuf[NI_MAXHOST];
char sbuf[NI_MAXSERV];
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const int niflags = NI_NUMERICHOST | NI_NUMERICSERV | NI_WITHSCOPEID;
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const int niflags = NI_NUMERICHOST | NI_NUMERICSERV;
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1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
if (getnameinfo(res->ai_addr, res->ai_addrlen, nbuf, sizeof(nbuf),
sbuf, sizeof(sbuf), niflags)) {
snprintf(nbuf, sizeof(nbuf), "?");
snprintf(sbuf, sizeof(sbuf), "?");
}
if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, sizeof(hbuf),
NULL, 0, 0)) {
infof(data, "Connecting to %s port %s\n", nbuf, sbuf);
} else {
infof(data, "Connecting to %s (%s) port %s\n", hbuf, nbuf, sbuf);
}
}
if (connect(conn->secondarysocket, ai->ai_addr, ai->ai_addrlen) < 0) {
close(conn->secondarysocket);
conn->secondarysocket = -1;
continue;
}
break;
if (conn->secondarysocket < 0) {
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failf(data, strerror(errno));
return CURLE_FTP_CANT_RECONNECT;
}
#else
conn->secondarysocket = socket(AF_INET, SOCK_STREAM, 0);
memset((char *) &serv_addr, '\0', sizeof(serv_addr));
memcpy((char *)&(serv_addr.sin_addr), he->h_addr, he->h_length);
serv_addr.sin_family = he->h_addrtype;
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if(data->set.verbose) {
struct in_addr in;
struct hostent * answer;
#if defined(HAVE_INET_ADDR)
# if defined(HAVE_GETHOSTBYADDR_R)
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# ifdef HAVE_GETHOSTBYADDR_R
# ifdef HAVE_GETHOSTBYADDR_R_5
/* AIX, Digital Unix style:
extern int gethostbyaddr_r(char *addr, size_t len, int type,
struct hostent *htent, struct hostent_data *ht_data); */
/* Fred Noz helped me try this out, now it at least compiles! */
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if(gethostbyaddr_r((char *) &address,
sizeof(address), AF_INET,
(struct hostent *)hostent_buf,
hostent_buf + sizeof(*answer)))
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answer=NULL;
# endif
# ifdef HAVE_GETHOSTBYADDR_R_7
answer = gethostbyaddr_r((char *) &address, sizeof(address), AF_INET,
(struct hostent *)hostent_buf,
hostent_buf + sizeof(*answer),
sizeof(hostent_buf) - sizeof(*answer),
&h_errnop);
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# endif
# ifdef HAVE_GETHOSTBYADDR_R_8
/* Linux style */
if(gethostbyaddr_r((char *) &address, sizeof(address), AF_INET,
(struct hostent *)hostent_buf,
hostent_buf + sizeof(*answer),
sizeof(hostent_buf) - sizeof(*answer),
&answer,
&h_errnop))
answer=NULL; /* error */
# endif
# else
answer = gethostbyaddr((char *) &address, sizeof(address), AF_INET);
#else
answer = NULL;
#endif
(void) memcpy(&in.s_addr, *he->h_addr_list, sizeof (in.s_addr));
infof(data, "Connecting to %s (%s) port %u\n",
answer?answer->h_name:newhost,
#if defined(HAVE_INET_NTOA_R)
inet_ntoa_r(in, ip_addr=ntoa_buf, sizeof(ntoa_buf)),
if(hostdataptr)
free(hostdataptr);
if (connect(conn->secondarysocket, (struct sockaddr *) &serv_addr,
sizeof(serv_addr)) < 0) {
switch(errno) {
#ifdef ECONNREFUSED
/* this should be made nicer */
case ECONNREFUSED:
failf(data, "Connection refused by ftp server");
break;
#endif
#ifdef EINTR
case EINTR:
failf(data, "Connection timed out to ftp server");
break;
#endif
default:
failf(data, "Can't connect to ftp server");
break;
}
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if (data->set.tunnel_thru_httpproxy) {
/* We want "seamless" FTP operations through HTTP proxy tunnel */
result = Curl_ConnectHTTPProxyTunnel(conn, conn->secondarysocket,
newhost, newport);
if(CURLE_OK != result)
return result;
}
} else {
return CURLE_FTP_CANT_RECONNECT;
}
/* we have the (new) data connection ready */
infof(data, "Connected the data stream!\n");
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if(data->set.upload) {
/* Set type to binary (unless specified ASCII) */
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result = _ftp_transfertype(conn, data->set.ftp_ascii);
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if(result)
return result;
if(conn->resume_from) {
/* we're about to continue the uploading of a file */
/* 1. get already existing file's size. We use the SIZE
command for this which may not exist in the server!
The SIZE command is not in RFC959. */
/* 2. This used to set REST. But since we can do append, we
don't another ftp command. We just skip the source file
offset and then we APPEND the rest on the file instead */
/* 3. pass file-size number of bytes in the source file */
/* 4. lower the infilesize counter */
/* => transfer as usual */
if(conn->resume_from < 0 ) {
/* we could've got a specified offset from the command line,
but now we know we didn't */
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if(CURLE_OK != _ftp_getsize(conn, ftp->file, &conn->resume_from)) {
failf(data, "Couldn't get remote file size");
if(conn->resume_from) {
/* do we still game? */
int passed=0;
/* enable append instead */
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data->set.ftp_append = 1;
/* Now, let's read off the proper amount of bytes from the
input. If we knew it was a proper file we could've just
fseek()ed but we only have a stream here */
do {
int readthisamountnow = (conn->resume_from - passed);
int actuallyread;
if(readthisamountnow > BUFSIZE)
readthisamountnow = BUFSIZE;
actuallyread =
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data->set.fread(data->state.buffer, 1, readthisamountnow,
data->set.in);
passed += actuallyread;
if(actuallyread != readthisamountnow) {
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failf(data, "Could only read %d bytes from the input\n", passed);
while(passed != conn->resume_from);
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if(data->set.infilesize>0) {
data->set.infilesize -= conn->resume_from;
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if(data->set.infilesize <= 0) {
infof(data, "File already completely uploaded\n");
/* no data to transfer */
result=Curl_Transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
/* Set resume done so that we won't get any error in
* Curl_ftp_done() because we didn't transfer the amount of bytes
* that the local file file obviously is */
conn->bits.resume_done = TRUE;
return CURLE_OK;
}
}
/* we've passed, proceed as normal */
}
}
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/* Send everything on data->set.in to the socket */
if(data->set.ftp_append)
/* we append onto the file instead of rewriting it */
ftpsendf(conn->firstsocket, conn, "APPE %s", ftp->file);
ftpsendf(conn->firstsocket, conn, "STOR %s", ftp->file);
nread = Curl_GetFTPResponse(conn->firstsocket, buf, conn, &ftpcode);
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if(nread < 0)
return CURLE_OPERATION_TIMEOUTED;
if(ftpcode>=400) {
failf(data, "Failed FTP upload:%s", buf+3);
/* oops, we never close the sockets! */
return CURLE_FTP_COULDNT_STOR_FILE;
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if(data->set.ftp_use_port) {
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/* PORT means we are now awaiting the server to connect to us. */
result = AllowServerConnect(data, conn, portsock);
if( result )
return result;
}
*bytecountp=0;
/* When we know we're uploading a specified file, we can get the file
size prior to the actual upload. */
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Curl_pgrsSetUploadSize(data, data->set.infilesize);
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result = Curl_Transfer(conn, -1, -1, FALSE, NULL, /* no download */
conn->secondarysocket, bytecountp);
if(result)
return result;
}
else {
/* Retrieve file or directory */
bool dirlist=FALSE;
long downloadsize=-1;
if(conn->bits.use_range && conn->range) {
int totalsize=-1;
char *ptr;
char *ptr2;
from=strtol(conn->range, &ptr, 0);
while(ptr && *ptr && (isspace((int)*ptr) || (*ptr=='-')))
ptr++;
to=strtol(ptr, &ptr2, 0);
if(ptr == ptr2) {
/* we didn't get any digit */
to=-1;
}
conn->resume_from = from;
infof(data, "FTP RANGE %d to end of file\n", from);
conn->maxdownload = -from;
conn->resume_from = from;
infof(data, "FTP RANGE the last %d bytes\n", totalsize);
conn->maxdownload = totalsize+1; /* include the last mentioned byte */
conn->resume_from = from;
infof(data, "FTP RANGE from %d getting %d bytes\n", from,
conn->maxdownload);
}
infof(data, "range-download from %d to %d, totally %d bytes\n",
from, to, totalsize);
}
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if((data->set.ftp_list_only) || !ftp->file) {
/* The specified path ends with a slash, and therefore we think this
is a directory that is requested, use LIST. But before that we
need to set ASCII transfer mode. */
dirlist = TRUE;
/* Set type to ASCII */
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result = _ftp_transfertype(conn, TRUE /* ASCII enforced */);
if(result)
return result;
/* if this output is to be machine-parsed, the NLST command will be
better used since the LIST command output is not specified or
standard in any way */
ftpsendf(conn->firstsocket, conn, "%s",
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data->set.customrequest?data->set.customrequest:
(data->set.ftp_list_only?"NLST":"LIST"));
}
else {
/* Set type to binary (unless specified ASCII) */
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result = _ftp_transfertype(conn, data->set.ftp_ascii);
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if(result)
return result;
if(conn->resume_from) {
/* Daniel: (August 4, 1999)
*
* We start with trying to use the SIZE command to figure out the size
* of the file we're gonna get. If we can get the size, this is by far
* the best way to know if we're trying to resume beyond the EOF. */
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int foundsize=-1;
result = _ftp_getsize(conn, ftp->file, &foundsize);
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if(CURLE_OK != result) {
infof(data, "ftp server doesn't support SIZE");
/* We couldn't get the size and therefore we can't know if there
really is a part of the file left to get, although the server
will just close the connection when we start the connection so it
won't cause us any harm, just not make us exit as nicely. */
}
else {
/* We got a file size report, so we check that there actually is a
part of the file left to get, or else we go home. */
if(conn->resume_from< 0) {
/* We're supposed to download the last abs(from) bytes */
if(foundsize < -conn->resume_from) {
failf(data, "Offset (%d) was beyond file size (%d)",
conn->resume_from, foundsize);
return CURLE_FTP_BAD_DOWNLOAD_RESUME;
}
/* convert to size to download */
downloadsize = -conn->resume_from;
conn->resume_from = foundsize - downloadsize;
if(foundsize < conn->resume_from) {
failf(data, "Offset (%d) was beyond file size (%d)",
conn->resume_from, foundsize);
return CURLE_FTP_BAD_DOWNLOAD_RESUME;
}
/* Now store the number of bytes we are expected to download */
downloadsize = foundsize-conn->resume_from;
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if (downloadsize == 0) {
/* no data to transfer */
result=Curl_Transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
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infof(data, "File already completely downloaded\n");
/* Set resume done so that we won't get any error in Curl_ftp_done()
* because we didn't transfer the amount of bytes that the remote
* file obviously is */
conn->bits.resume_done = TRUE;
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return CURLE_OK;
}
/* Set resume file transfer offset */
infof(data, "Instructs server to resume from offset %d\n",
conn->resume_from);
ftpsendf(conn->firstsocket, conn, "REST %d", conn->resume_from);
nread = Curl_GetFTPResponse(conn->firstsocket, buf, conn, &ftpcode);
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if(nread < 0)
return CURLE_OPERATION_TIMEOUTED;
if(ftpcode != 350) {
ftpsendf(conn->firstsocket, conn, "RETR %s", ftp->file);
nread = Curl_GetFTPResponse(conn->firstsocket, buf, conn, &ftpcode);
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if(nread < 0)
return CURLE_OPERATION_TIMEOUTED;
if((ftpcode == 150) || (ftpcode == 125)) {
/*
A;
150 Opening BINARY mode data connection for /etc/passwd (2241
bytes). (ok, the file is being transfered)
B:
150 Opening ASCII mode data connection for /bin/ls
C:
150 ASCII data connection for /bin/ls (137.167.104.91,37445) (0 bytes).
D:
150 Opening ASCII mode data connection for /linux/fisk/kpanelrc (0.0.0.0,0) (545 bytes).
E:
125 Data connection already open; Transfer starting. */
int size=-1; /* default unknown size */
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if(!dirlist &&
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!data->set.ftp_ascii &&
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(-1 == downloadsize)) {
/*
* It seems directory listings either don't show the size or very
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* often uses size 0 anyway. ASCII transfers may very well turn out
* that the transfered amount of data is not the same as this line
* tells, why using this number in those cases only confuses us.
*
* Example D above makes this parsing a little tricky */
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
char *bytes;
bytes=strstr(buf, " bytes");
if(bytes--) {
int index=bytes-buf;
/* this is a hint there is size information in there! ;-) */
while(--index) {
/* scan for the parenthesis and break there */
if('(' == *bytes)
break;
/* if only skip digits, or else we're in deep trouble */
if(!isdigit((int)*bytes)) {
bytes=NULL;
break;
}
/* one more estep backwards */
bytes--;
}
/* only if we have nothing but digits: */
if(bytes++) {
/* get the number! */
size = atoi(bytes);
}
}
}
else if(downloadsize > -1)
size = downloadsize;
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if(data->set.ftp_use_port) {
result = AllowServerConnect(data, conn, portsock);
if( result )
return result;
}
infof(data, "Getting file with size: %d\n", size);
/* FTP download: */
result=Curl_Transfer(conn, conn->secondarysocket, size, FALSE,
bytecountp,
-1, NULL); /* no upload here */
if(result)
return result;
}
else {
failf(data, "%s", buf+4);
return CURLE_FTP_COULDNT_RETR_FILE;
}
/* -- deal with the ftp server! -- */
/* argument is already checked for validity */
CURLcode Curl_ftp(struct connectdata *conn)
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struct SessionHandle *data = conn->data;
struct FTP *ftp;
int dirlength=0; /* 0 forces strlen() */
/* the ftp struct is already inited in ftp_connect() */
/* We split the path into dir and file parts *before* we URLdecode
it */
ftp->file = strrchr(conn->ppath, '/');
if(ftp->file) {
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if(ftp->file != conn->ppath)
dirlength=ftp->file-conn->ppath; /* don't count the traling slash */
ftp->file++; /* point to the first letter in the file name part or
remain NULL */
}
else {
ftp->file = conn->ppath; /* there's only a file part */
}
if(*ftp->file) {
ftp->file = curl_unescape(ftp->file, 0);
if(NULL == ftp->file) {
failf(data, "no memory");
return CURLE_OUT_OF_MEMORY;
}
ftp->file=NULL; /* instead of point to a zero byte, we make it a NULL
pointer */
ftp->urlpath = conn->ppath;
if(dirlength) {
ftp->dir = curl_unescape(ftp->urlpath, dirlength);
if(NULL == ftp->dir) {
if(ftp->file)
free(ftp->file);
failf(data, "no memory");
return CURLE_OUT_OF_MEMORY; /* failure */
}
}
else
ftp->dir = NULL;
retcode = _ftp(conn);
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/* clean up here, success or error doesn't matter */
if(ftp->file)
free(ftp->file);
if(ftp->dir)
free(ftp->dir);
ftp->file = ftp->dir = NULL; /* zero */
/*
* ftpsendf() sends the formated string as a ftp command to a ftp server
*
* NOTE: we build the command in a fixed-length buffer, which sets length
* restrictions on the command!
*
*/
size_t Curl_ftpsendf(int fd, struct connectdata *conn,
const char *fmt, ...)
{
size_t bytes_written;
char s[256];
va_list ap;
va_start(ap, fmt);
vsnprintf(s, 250, fmt, ap);
va_end(ap);
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if(conn->data->set.verbose)
fprintf(conn->data->set.err, "> %s\n", s);
strcat(s, "\r\n"); /* append a trailing CRLF */
bytes_written=0;
Curl_write(conn, fd, s, strlen(s), &bytes_written);
return(bytes_written);
}
CURLcode Curl_ftp_disconnect(struct connectdata *conn)
{
struct FTP *ftp= conn->proto.ftp;
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/* The FTP session may or may not have been allocated/setup at this point! */
if(ftp) {
if(ftp->entrypath)
free(ftp->entrypath);
}
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/*
* local variables:
* eval: (load-file "../curl-mode.el")
* end:
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* vim600: et sw=2 ts=2 sts=2 tw=78 fdm=marker
* vim<600: et sw=2 ts=2 sts=2 tw=78
*/