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libxml2/nanoftp.c
Nick Wellnhofer 886bf4e63b Stop calling xmlMemoryDump 
This was used to check for memory leaks but could potentially create a
.memdump file. These days, there are better ways to check for memory
leaks.
2023-04-30 15:48:41 +02:00

2099 lines
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/*
* nanoftp.c: basic FTP client support
*
* Reference: RFC 959
*/
#ifdef TESTING
#define STANDALONE
#define HAVE_UNISTD_H
#define HAVE_SYS_SOCKET_H
#define HAVE_NETINET_IN_H
#define HAVE_NETDB_H
#define HAVE_SYS_TIME_H
#endif /* TESTING */
#define IN_LIBXML
#include "libxml.h"
#ifdef LIBXML_FTP_ENABLED
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#elif defined (_WIN32)
#include <io.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#include <libxml/xmlmemory.h>
#include <libxml/parser.h>
#include <libxml/xmlerror.h>
#include <libxml/uri.h>
#include <libxml/nanoftp.h>
#include <libxml/globals.h>
#include "private/error.h"
#include "private/io.h"
/* #define DEBUG_FTP 1 */
#ifdef STANDALONE
#ifndef DEBUG_FTP
#define DEBUG_FTP 1
#endif
#endif
#if defined(_WIN32)
#include <wsockcompat.h>
#endif
/**
* A couple portability macros
*/
#ifndef _WINSOCKAPI_
#define closesocket(s) close(s)
#endif
#ifndef XML_SOCKLEN_T
#define XML_SOCKLEN_T unsigned int
#endif
#define GETHOSTBYNAME_ARG_CAST (char *)
#define SEND_ARG2_CAST (char *)
#define FTP_COMMAND_OK 200
#define FTP_SYNTAX_ERROR 500
#define FTP_GET_PASSWD 331
#define FTP_BUF_SIZE 1024
#define XML_NANO_MAX_URLBUF 4096
typedef struct xmlNanoFTPCtxt {
char *protocol; /* the protocol name */
char *hostname; /* the host name */
int port; /* the port */
char *path; /* the path within the URL */
char *user; /* user string */
char *passwd; /* passwd string */
#ifdef SUPPORT_IP6
struct sockaddr_storage ftpAddr; /* this is large enough to hold IPv6 address*/
#else
struct sockaddr_in ftpAddr; /* the socket address struct */
#endif
int passive; /* currently we support only passive !!! */
SOCKET controlFd; /* the file descriptor for the control socket */
SOCKET dataFd; /* the file descriptor for the data socket */
int state; /* WRITE / READ / CLOSED */
int returnValue; /* the protocol return value */
/* buffer for data received from the control connection */
char controlBuf[FTP_BUF_SIZE + 1];
int controlBufIndex;
int controlBufUsed;
int controlBufAnswer;
} xmlNanoFTPCtxt, *xmlNanoFTPCtxtPtr;
static int initialized = 0;
static char *proxy = NULL; /* the proxy name if any */
static int proxyPort = 0; /* the proxy port if any */
static char *proxyUser = NULL; /* user for proxy authentication */
static char *proxyPasswd = NULL;/* passwd for proxy authentication */
static int proxyType = 0; /* uses TYPE or a@b ? */
#ifdef SUPPORT_IP6
static
int have_ipv6(void) {
int s;
s = socket (AF_INET6, SOCK_STREAM, 0);
if (s != -1) {
close (s);
return (1);
}
return (0);
}
#endif
/**
* xmlFTPErrMemory:
* @extra: extra information
*
* Handle an out of memory condition
*/
static void
xmlFTPErrMemory(const char *extra)
{
__xmlSimpleError(XML_FROM_FTP, XML_ERR_NO_MEMORY, NULL, NULL, extra);
}
/**
* xmlNanoFTPInit:
*
* Initialize the FTP protocol layer.
* Currently it just checks for proxy information,
* and get the hostname
*/
void
xmlNanoFTPInit(void) {
const char *env;
#ifdef _WINSOCKAPI_
WSADATA wsaData;
#endif
if (initialized)
return;
#ifdef _WINSOCKAPI_
if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0)
return;
#endif
proxyPort = 21;
env = getenv("no_proxy");
if (env && ((env[0] == '*' ) && (env[1] == 0)))
return;
env = getenv("ftp_proxy");
if (env != NULL) {
xmlNanoFTPScanProxy(env);
} else {
env = getenv("FTP_PROXY");
if (env != NULL) {
xmlNanoFTPScanProxy(env);
}
}
env = getenv("ftp_proxy_user");
if (env != NULL) {
proxyUser = xmlMemStrdup(env);
}
env = getenv("ftp_proxy_password");
if (env != NULL) {
proxyPasswd = xmlMemStrdup(env);
}
initialized = 1;
}
/**
* xmlNanoFTPCleanup:
*
* Cleanup the FTP protocol layer. This cleanup proxy information.
*/
void
xmlNanoFTPCleanup(void) {
if (proxy != NULL) {
xmlFree(proxy);
proxy = NULL;
}
if (proxyUser != NULL) {
xmlFree(proxyUser);
proxyUser = NULL;
}
if (proxyPasswd != NULL) {
xmlFree(proxyPasswd);
proxyPasswd = NULL;
}
#ifdef _WINSOCKAPI_
if (initialized)
WSACleanup();
#endif
initialized = 0;
}
/**
* xmlNanoFTPProxy:
* @host: the proxy host name
* @port: the proxy port
* @user: the proxy user name
* @passwd: the proxy password
* @type: the type of proxy 1 for using SITE, 2 for USER a@b
*
* Setup the FTP proxy information.
* This can also be done by using ftp_proxy ftp_proxy_user and
* ftp_proxy_password environment variables.
*/
void
xmlNanoFTPProxy(const char *host, int port, const char *user,
const char *passwd, int type) {
if (proxy != NULL) {
xmlFree(proxy);
proxy = NULL;
}
if (proxyUser != NULL) {
xmlFree(proxyUser);
proxyUser = NULL;
}
if (proxyPasswd != NULL) {
xmlFree(proxyPasswd);
proxyPasswd = NULL;
}
if (host)
proxy = xmlMemStrdup(host);
if (user)
proxyUser = xmlMemStrdup(user);
if (passwd)
proxyPasswd = xmlMemStrdup(passwd);
proxyPort = port;
proxyType = type;
}
/**
* xmlNanoFTPScanURL:
* @ctx: an FTP context
* @URL: The URL used to initialize the context
*
* (Re)Initialize an FTP context by parsing the URL and finding
* the protocol host port and path it indicates.
*/
static void
xmlNanoFTPScanURL(void *ctx, const char *URL) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
xmlURIPtr uri;
/*
* Clear any existing data from the context
*/
if (ctxt->protocol != NULL) {
xmlFree(ctxt->protocol);
ctxt->protocol = NULL;
}
if (ctxt->hostname != NULL) {
xmlFree(ctxt->hostname);
ctxt->hostname = NULL;
}
if (ctxt->path != NULL) {
xmlFree(ctxt->path);
ctxt->path = NULL;
}
if (URL == NULL) return;
uri = xmlParseURIRaw(URL, 1);
if (uri == NULL)
return;
if ((uri->scheme == NULL) || (uri->server == NULL)) {
xmlFreeURI(uri);
return;
}
ctxt->protocol = xmlMemStrdup(uri->scheme);
ctxt->hostname = xmlMemStrdup(uri->server);
if (uri->path != NULL)
ctxt->path = xmlMemStrdup(uri->path);
else
ctxt->path = xmlMemStrdup("/");
if (uri->port != 0)
ctxt->port = uri->port;
if (uri->user != NULL) {
char *cptr;
if ((cptr=strchr(uri->user, ':')) == NULL)
ctxt->user = xmlMemStrdup(uri->user);
else {
ctxt->user = (char *)xmlStrndup((xmlChar *)uri->user,
(cptr - uri->user));
ctxt->passwd = xmlMemStrdup(cptr+1);
}
}
xmlFreeURI(uri);
}
/**
* xmlNanoFTPUpdateURL:
* @ctx: an FTP context
* @URL: The URL used to update the context
*
* Update an FTP context by parsing the URL and finding
* new path it indicates. If there is an error in the
* protocol, hostname, port or other information, the
* error is raised. It indicates a new connection has to
* be established.
*
* Returns 0 if Ok, -1 in case of error (other host).
*/
int
xmlNanoFTPUpdateURL(void *ctx, const char *URL) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
xmlURIPtr uri;
if (URL == NULL)
return(-1);
if (ctxt == NULL)
return(-1);
if (ctxt->protocol == NULL)
return(-1);
if (ctxt->hostname == NULL)
return(-1);
uri = xmlParseURIRaw(URL, 1);
if (uri == NULL)
return(-1);
if ((uri->scheme == NULL) || (uri->server == NULL)) {
xmlFreeURI(uri);
return(-1);
}
if ((strcmp(ctxt->protocol, uri->scheme)) ||
(strcmp(ctxt->hostname, uri->server)) ||
((uri->port != 0) && (ctxt->port != uri->port))) {
xmlFreeURI(uri);
return(-1);
}
if (uri->port != 0)
ctxt->port = uri->port;
if (ctxt->path != NULL) {
xmlFree(ctxt->path);
ctxt->path = NULL;
}
if (uri->path == NULL)
ctxt->path = xmlMemStrdup("/");
else
ctxt->path = xmlMemStrdup(uri->path);
xmlFreeURI(uri);
return(0);
}
/**
* xmlNanoFTPScanProxy:
* @URL: The proxy URL used to initialize the proxy context
*
* (Re)Initialize the FTP Proxy context by parsing the URL and finding
* the protocol host port it indicates.
* Should be like ftp://myproxy/ or ftp://myproxy:3128/
* A NULL URL cleans up proxy information.
*/
void
xmlNanoFTPScanProxy(const char *URL) {
xmlURIPtr uri;
if (proxy != NULL) {
xmlFree(proxy);
proxy = NULL;
}
proxyPort = 0;
#ifdef DEBUG_FTP
if (URL == NULL)
xmlGenericError(xmlGenericErrorContext,
"Removing FTP proxy info\n");
else
xmlGenericError(xmlGenericErrorContext,
"Using FTP proxy %s\n", URL);
#endif
if (URL == NULL) return;
uri = xmlParseURIRaw(URL, 1);
if ((uri == NULL) || (uri->scheme == NULL) ||
(strcmp(uri->scheme, "ftp")) || (uri->server == NULL)) {
__xmlIOErr(XML_FROM_FTP, XML_FTP_URL_SYNTAX, "Syntax Error\n");
if (uri != NULL)
xmlFreeURI(uri);
return;
}
proxy = xmlMemStrdup(uri->server);
if (uri->port != 0)
proxyPort = uri->port;
xmlFreeURI(uri);
}
/**
* xmlNanoFTPNewCtxt:
* @URL: The URL used to initialize the context
*
* Allocate and initialize a new FTP context.
*
* Returns an FTP context or NULL in case of error.
*/
void*
xmlNanoFTPNewCtxt(const char *URL) {
xmlNanoFTPCtxtPtr ret;
char *unescaped;
ret = (xmlNanoFTPCtxtPtr) xmlMalloc(sizeof(xmlNanoFTPCtxt));
if (ret == NULL) {
xmlFTPErrMemory("allocating FTP context");
return(NULL);
}
memset(ret, 0, sizeof(xmlNanoFTPCtxt));
ret->port = 21;
ret->passive = 1;
ret->returnValue = 0;
ret->controlBufIndex = 0;
ret->controlBufUsed = 0;
ret->controlFd = INVALID_SOCKET;
unescaped = xmlURIUnescapeString(URL, 0, NULL);
if (unescaped != NULL) {
xmlNanoFTPScanURL(ret, unescaped);
xmlFree(unescaped);
} else if (URL != NULL)
xmlNanoFTPScanURL(ret, URL);
return(ret);
}
/**
* xmlNanoFTPFreeCtxt:
* @ctx: an FTP context
*
* Frees the context after closing the connection.
*/
void
xmlNanoFTPFreeCtxt(void * ctx) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
if (ctxt == NULL) return;
if (ctxt->hostname != NULL) xmlFree(ctxt->hostname);
if (ctxt->protocol != NULL) xmlFree(ctxt->protocol);
if (ctxt->path != NULL) xmlFree(ctxt->path);
if (ctxt->user != NULL) xmlFree(ctxt->user);
if (ctxt->passwd != NULL) xmlFree(ctxt->passwd);
ctxt->passive = 1;
if (ctxt->controlFd != INVALID_SOCKET) closesocket(ctxt->controlFd);
ctxt->controlFd = INVALID_SOCKET;
ctxt->controlBufIndex = -1;
ctxt->controlBufUsed = -1;
xmlFree(ctxt);
}
/**
* xmlNanoFTPParseResponse:
* @buf: the buffer containing the response
* @len: the buffer length
*
* Parsing of the server answer, we just extract the code.
*
* returns 0 for errors
* +XXX for last line of response
* -XXX for response to be continued
*/
static int
xmlNanoFTPParseResponse(char *buf, int len) {
int val = 0;
if (len < 3) return(-1);
if ((*buf >= '0') && (*buf <= '9'))
val = val * 10 + (*buf - '0');
else
return(0);
buf++;
if ((*buf >= '0') && (*buf <= '9'))
val = val * 10 + (*buf - '0');
else
return(0);
buf++;
if ((*buf >= '0') && (*buf <= '9'))
val = val * 10 + (*buf - '0');
else
return(0);
buf++;
if (*buf == '-')
return(-val);
return(val);
}
/**
* xmlNanoFTPGetMore:
* @ctx: an FTP context
*
* Read more information from the FTP control connection
* Returns the number of bytes read, < 0 indicates an error
*/
static int
xmlNanoFTPGetMore(void *ctx) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
int len;
int size;
if ((ctxt == NULL) || (ctxt->controlFd == INVALID_SOCKET)) return(-1);
if ((ctxt->controlBufIndex < 0) || (ctxt->controlBufIndex > FTP_BUF_SIZE)) {
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext,
"xmlNanoFTPGetMore : controlBufIndex = %d\n",
ctxt->controlBufIndex);
#endif
return(-1);
}
if ((ctxt->controlBufUsed < 0) || (ctxt->controlBufUsed > FTP_BUF_SIZE)) {
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext,
"xmlNanoFTPGetMore : controlBufUsed = %d\n",
ctxt->controlBufUsed);
#endif
return(-1);
}
if (ctxt->controlBufIndex > ctxt->controlBufUsed) {
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext,
"xmlNanoFTPGetMore : controlBufIndex > controlBufUsed %d > %d\n",
ctxt->controlBufIndex, ctxt->controlBufUsed);
#endif
return(-1);
}
/*
* First pack the control buffer
*/
if (ctxt->controlBufIndex > 0) {
memmove(&ctxt->controlBuf[0], &ctxt->controlBuf[ctxt->controlBufIndex],
ctxt->controlBufUsed - ctxt->controlBufIndex);
ctxt->controlBufUsed -= ctxt->controlBufIndex;
ctxt->controlBufIndex = 0;
}
size = FTP_BUF_SIZE - ctxt->controlBufUsed;
if (size == 0) {
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext,
"xmlNanoFTPGetMore : buffer full %d \n", ctxt->controlBufUsed);
#endif
return(0);
}
/*
* Read the amount left on the control connection
*/
if ((len = recv(ctxt->controlFd, &ctxt->controlBuf[ctxt->controlBufIndex],
size, 0)) < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "recv failed");
closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
ctxt->controlFd = INVALID_SOCKET;
return(-1);
}
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext,
"xmlNanoFTPGetMore : read %d [%d - %d]\n", len,
ctxt->controlBufUsed, ctxt->controlBufUsed + len);
#endif
ctxt->controlBufUsed += len;
ctxt->controlBuf[ctxt->controlBufUsed] = 0;
return(len);
}
/**
* xmlNanoFTPReadResponse:
* @ctx: an FTP context
*
* Read the response from the FTP server after a command.
* Returns the code number
*/
static int
xmlNanoFTPReadResponse(void *ctx) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
char *ptr, *end;
int len;
int res = -1, cur = -1;
if ((ctxt == NULL) || (ctxt->controlFd == INVALID_SOCKET)) return(-1);
get_more:
/*
* Assumes everything up to controlBuf[controlBufIndex] has been read
* and analyzed.
*/
len = xmlNanoFTPGetMore(ctx);
if (len < 0) {
return(-1);
}
if ((ctxt->controlBufUsed == 0) && (len == 0)) {
return(-1);
}
ptr = &ctxt->controlBuf[ctxt->controlBufIndex];
end = &ctxt->controlBuf[ctxt->controlBufUsed];
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext,
"\n<<<\n%s\n--\n", ptr);
#endif
while (ptr < end) {
cur = xmlNanoFTPParseResponse(ptr, end - ptr);
if (cur > 0) {
/*
* Successfully scanned the control code, scratch
* till the end of the line, but keep the index to be
* able to analyze the result if needed.
*/
res = cur;
ptr += 3;
ctxt->controlBufAnswer = ptr - ctxt->controlBuf;
while ((ptr < end) && (*ptr != '\n')) ptr++;
if (*ptr == '\n') ptr++;
if (*ptr == '\r') ptr++;
break;
}
while ((ptr < end) && (*ptr != '\n')) ptr++;
if (ptr >= end) {
ctxt->controlBufIndex = ctxt->controlBufUsed;
goto get_more;
}
if (*ptr != '\r') ptr++;
}
if (res < 0) goto get_more;
ctxt->controlBufIndex = ptr - ctxt->controlBuf;
#ifdef DEBUG_FTP
ptr = &ctxt->controlBuf[ctxt->controlBufIndex];
xmlGenericError(xmlGenericErrorContext, "\n---\n%s\n--\n", ptr);
#endif
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "Got %d\n", res);
#endif
return(res / 100);
}
/**
* xmlNanoFTPGetResponse:
* @ctx: an FTP context
*
* Get the response from the FTP server after a command.
* Returns the code number
*/
int
xmlNanoFTPGetResponse(void *ctx) {
int res;
res = xmlNanoFTPReadResponse(ctx);
return(res);
}
/**
* xmlNanoFTPCheckResponse:
* @ctx: an FTP context
*
* Check if there is a response from the FTP server after a command.
* Returns the code number, or 0
*/
int
xmlNanoFTPCheckResponse(void *ctx) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
fd_set rfd;
struct timeval tv;
if ((ctxt == NULL) || (ctxt->controlFd == INVALID_SOCKET)) return(-1);
tv.tv_sec = 0;
tv.tv_usec = 0;
FD_ZERO(&rfd);
FD_SET(ctxt->controlFd, &rfd);
switch(select(ctxt->controlFd + 1, &rfd, NULL, NULL, &tv)) {
case 0:
return(0);
case -1:
__xmlIOErr(XML_FROM_FTP, 0, "select");
return(-1);
}
return(xmlNanoFTPReadResponse(ctx));
}
/**
* Send the user authentication
*/
static int
xmlNanoFTPSendUser(void *ctx) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
char buf[200];
int len;
int res;
if (ctxt->user == NULL)
snprintf(buf, sizeof(buf), "USER anonymous\r\n");
else
snprintf(buf, sizeof(buf), "USER %s\r\n", ctxt->user);
buf[sizeof(buf) - 1] = 0;
len = strlen(buf);
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "%s", buf);
#endif
res = send(ctxt->controlFd, SEND_ARG2_CAST buf, len, 0);
if (res < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "send failed");
return(res);
}
return(0);
}
/**
* Send the password authentication
*/
static int
xmlNanoFTPSendPasswd(void *ctx) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
char buf[200];
int len;
int res;
if (ctxt->passwd == NULL)
snprintf(buf, sizeof(buf), "PASS anonymous@\r\n");
else
snprintf(buf, sizeof(buf), "PASS %s\r\n", ctxt->passwd);
buf[sizeof(buf) - 1] = 0;
len = strlen(buf);
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "%s", buf);
#endif
res = send(ctxt->controlFd, SEND_ARG2_CAST buf, len, 0);
if (res < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "send failed");
return(res);
}
return(0);
}
/**
* xmlNanoFTPQuit:
* @ctx: an FTP context
*
* Send a QUIT command to the server
*
* Returns -1 in case of error, 0 otherwise
*/
int
xmlNanoFTPQuit(void *ctx) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
char buf[200];
int len, res;
if ((ctxt == NULL) || (ctxt->controlFd == INVALID_SOCKET)) return(-1);
snprintf(buf, sizeof(buf), "QUIT\r\n");
len = strlen(buf);
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "%s", buf); /* Just to be consistent, even though we know it can't have a % in it */
#endif
res = send(ctxt->controlFd, SEND_ARG2_CAST buf, len, 0);
if (res < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "send failed");
return(res);
}
return(0);
}
/**
* xmlNanoFTPConnect:
* @ctx: an FTP context
*
* Tries to open a control connection
*
* Returns -1 in case of error, 0 otherwise
*/
int
xmlNanoFTPConnect(void *ctx) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
struct hostent *hp;
int port;
int res;
int addrlen = sizeof (struct sockaddr_in);
if (ctxt == NULL)
return(-1);
if (ctxt->hostname == NULL)
return(-1);
/*
* do the blocking DNS query.
*/
if (proxy) {
port = proxyPort;
} else {
port = ctxt->port;
}
if (port == 0)
port = 21;
memset (&ctxt->ftpAddr, 0, sizeof(ctxt->ftpAddr));
#ifdef SUPPORT_IP6
if (have_ipv6 ()) {
struct addrinfo hints, *tmp, *result;
result = NULL;
memset (&hints, 0, sizeof(hints));
hints.ai_socktype = SOCK_STREAM;
if (proxy) {
if (getaddrinfo (proxy, NULL, &hints, &result) != 0) {
__xmlIOErr(XML_FROM_FTP, 0, "getaddrinfo failed");
return (-1);
}
}
else
if (getaddrinfo (ctxt->hostname, NULL, &hints, &result) != 0) {
__xmlIOErr(XML_FROM_FTP, 0, "getaddrinfo failed");
return (-1);
}
for (tmp = result; tmp; tmp = tmp->ai_next)
if (tmp->ai_family == AF_INET || tmp->ai_family == AF_INET6)
break;
if (!tmp) {
if (result)
freeaddrinfo (result);
__xmlIOErr(XML_FROM_FTP, 0, "getaddrinfo failed");
return (-1);
}
if ((size_t)tmp->ai_addrlen > sizeof(ctxt->ftpAddr)) {
if (result)
freeaddrinfo (result);
__xmlIOErr(XML_FROM_FTP, 0, "gethostbyname address mismatch");
return (-1);
}
if (tmp->ai_family == AF_INET6) {
memcpy (&ctxt->ftpAddr, tmp->ai_addr, tmp->ai_addrlen);
((struct sockaddr_in6 *) &ctxt->ftpAddr)->sin6_port = htons (port);
ctxt->controlFd = socket (AF_INET6, SOCK_STREAM, 0);
}
else {
memcpy (&ctxt->ftpAddr, tmp->ai_addr, tmp->ai_addrlen);
((struct sockaddr_in *) &ctxt->ftpAddr)->sin_port = htons (port);
ctxt->controlFd = socket (AF_INET, SOCK_STREAM, 0);
}
addrlen = tmp->ai_addrlen;
freeaddrinfo (result);
}
else
#endif
{
if (proxy)
hp = gethostbyname (GETHOSTBYNAME_ARG_CAST proxy);
else
hp = gethostbyname (GETHOSTBYNAME_ARG_CAST ctxt->hostname);
if (hp == NULL) {
__xmlIOErr(XML_FROM_FTP, 0, "gethostbyname failed");
return (-1);
}
if ((unsigned int) hp->h_length >
sizeof(((struct sockaddr_in *)&ctxt->ftpAddr)->sin_addr)) {
__xmlIOErr(XML_FROM_FTP, 0, "gethostbyname address mismatch");
return (-1);
}
/*
* Prepare the socket
*/
((struct sockaddr_in *)&ctxt->ftpAddr)->sin_family = AF_INET;
memcpy (&((struct sockaddr_in *)&ctxt->ftpAddr)->sin_addr,
hp->h_addr_list[0], hp->h_length);
((struct sockaddr_in *)&ctxt->ftpAddr)->sin_port =
(unsigned short)htons ((unsigned short)port);
ctxt->controlFd = socket (AF_INET, SOCK_STREAM, 0);
addrlen = sizeof (struct sockaddr_in);
}
if (ctxt->controlFd == INVALID_SOCKET) {
__xmlIOErr(XML_FROM_FTP, 0, "socket failed");
return(-1);
}
/*
* Do the connect.
*/
if (connect(ctxt->controlFd, (struct sockaddr *) &ctxt->ftpAddr,
addrlen) < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "Failed to create a connection");
closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
ctxt->controlFd = INVALID_SOCKET;
return(-1);
}
/*
* Wait for the HELLO from the server.
*/
res = xmlNanoFTPGetResponse(ctxt);
if (res != 2) {
closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
ctxt->controlFd = INVALID_SOCKET;
return(-1);
}
/*
* State diagram for the login operation on the FTP server
*
* Reference: RFC 959
*
* 1
* +---+ USER +---+------------->+---+
* | B |---------->| W | 2 ---->| E |
* +---+ +---+------ | -->+---+
* | | | | |
* 3 | | 4,5 | | |
* -------------- ----- | | |
* | | | | |
* | | | | |
* | --------- |
* | 1| | | |
* V | | | |
* +---+ PASS +---+ 2 | ------>+---+
* | |---------->| W |------------->| S |
* +---+ +---+ ---------->+---+
* | | | | |
* 3 | |4,5| | |
* -------------- -------- |
* | | | | |
* | | | | |
* | -----------
* | 1,3| | | |
* V | 2| | |
* +---+ ACCT +---+-- | ----->+---+
* | |---------->| W | 4,5 -------->| F |
* +---+ +---+------------->+---+
*
* Of course in case of using a proxy this get really nasty and is not
* standardized at all :-(
*/
if (proxy) {
int len;
char buf[400];
if (proxyUser != NULL) {
/*
* We need proxy auth
*/
snprintf(buf, sizeof(buf), "USER %s\r\n", proxyUser);
buf[sizeof(buf) - 1] = 0;
len = strlen(buf);
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "%s", buf);
#endif
res = send(ctxt->controlFd, SEND_ARG2_CAST buf, len, 0);
if (res < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "send failed");
closesocket(ctxt->controlFd);
ctxt->controlFd = INVALID_SOCKET;
return(res);
}
res = xmlNanoFTPGetResponse(ctxt);
switch (res) {
case 2:
if (proxyPasswd == NULL)
break;
/* Falls through. */
case 3:
if (proxyPasswd != NULL)
snprintf(buf, sizeof(buf), "PASS %s\r\n", proxyPasswd);
else
snprintf(buf, sizeof(buf), "PASS anonymous@\r\n");
buf[sizeof(buf) - 1] = 0;
len = strlen(buf);
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "%s", buf);
#endif
res = send(ctxt->controlFd, SEND_ARG2_CAST buf, len, 0);
if (res < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "send failed");
closesocket(ctxt->controlFd);
ctxt->controlFd = INVALID_SOCKET;
return(res);
}
res = xmlNanoFTPGetResponse(ctxt);
if (res > 3) {
closesocket(ctxt->controlFd);
ctxt->controlFd = INVALID_SOCKET;
return(-1);
}
break;
case 1:
break;
case 4:
case 5:
case -1:
default:
closesocket(ctxt->controlFd);
ctxt->controlFd = INVALID_SOCKET;
return(-1);
}
}
/*
* We assume we don't need more authentication to the proxy
* and that it succeeded :-\
*/
switch (proxyType) {
case 0:
/* we will try in sequence */
case 1:
/* Using SITE command */
snprintf(buf, sizeof(buf), "SITE %s\r\n", ctxt->hostname);
buf[sizeof(buf) - 1] = 0;
len = strlen(buf);
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "%s", buf);
#endif
res = send(ctxt->controlFd, SEND_ARG2_CAST buf, len, 0);
if (res < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "send failed");
closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
ctxt->controlFd = INVALID_SOCKET;
return(res);
}
res = xmlNanoFTPGetResponse(ctxt);
if (res == 2) {
/* we assume it worked :-\ 1 is error for SITE command */
proxyType = 1;
break;
}
if (proxyType == 1) {
closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
ctxt->controlFd = INVALID_SOCKET;
return(-1);
}
/* Falls through. */
case 2:
/* USER user@host command */
if (ctxt->user == NULL)
snprintf(buf, sizeof(buf), "USER anonymous@%s\r\n",
ctxt->hostname);
else
snprintf(buf, sizeof(buf), "USER %s@%s\r\n",
ctxt->user, ctxt->hostname);
buf[sizeof(buf) - 1] = 0;
len = strlen(buf);
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "%s", buf);
#endif
res = send(ctxt->controlFd, SEND_ARG2_CAST buf, len, 0);
if (res < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "send failed");
closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
ctxt->controlFd = INVALID_SOCKET;
return(res);
}
res = xmlNanoFTPGetResponse(ctxt);
if ((res == 1) || (res == 2)) {
/* we assume it worked :-\ */
proxyType = 2;
return(0);
}
if (ctxt->passwd == NULL)
snprintf(buf, sizeof(buf), "PASS anonymous@\r\n");
else
snprintf(buf, sizeof(buf), "PASS %s\r\n", ctxt->passwd);
buf[sizeof(buf) - 1] = 0;
len = strlen(buf);
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "%s", buf);
#endif
res = send(ctxt->controlFd, SEND_ARG2_CAST buf, len, 0);
if (res < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "send failed");
closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
ctxt->controlFd = INVALID_SOCKET;
return(res);
}
res = xmlNanoFTPGetResponse(ctxt);
if ((res == 1) || (res == 2)) {
/* we assume it worked :-\ */
proxyType = 2;
return(0);
}
if (proxyType == 2) {
closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
ctxt->controlFd = INVALID_SOCKET;
return(-1);
}
/* Falls through. */
case 3:
/*
* If you need support for other Proxy authentication scheme
* send the code or at least the sequence in use.
*/
default:
closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
ctxt->controlFd = INVALID_SOCKET;
return(-1);
}
}
/*
* Non-proxy handling.
*/
res = xmlNanoFTPSendUser(ctxt);
if (res < 0) {
closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
ctxt->controlFd = INVALID_SOCKET;
return(-1);
}
res = xmlNanoFTPGetResponse(ctxt);
switch (res) {
case 2:
return(0);
case 3:
break;
case 1:
case 4:
case 5:
case -1:
default:
closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
ctxt->controlFd = INVALID_SOCKET;
return(-1);
}
res = xmlNanoFTPSendPasswd(ctxt);
if (res < 0) {
closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
ctxt->controlFd = INVALID_SOCKET;
return(-1);
}
res = xmlNanoFTPGetResponse(ctxt);
switch (res) {
case 2:
break;
case 3:
__xmlIOErr(XML_FROM_FTP, XML_FTP_ACCNT,
"FTP server asking for ACCNT on anonymous\n");
/* Falls through. */
case 1:
case 4:
case 5:
case -1:
default:
closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
ctxt->controlFd = INVALID_SOCKET;
return(-1);
}
return(0);
}
/**
* xmlNanoFTPConnectTo:
* @server: an FTP server name
* @port: the port (use 21 if 0)
*
* Tries to open a control connection to the given server/port
*
* Returns an fTP context or NULL if it failed
*/
void*
xmlNanoFTPConnectTo(const char *server, int port) {
xmlNanoFTPCtxtPtr ctxt;
int res;
xmlNanoFTPInit();
if (server == NULL)
return(NULL);
if (port <= 0)
return(NULL);
ctxt = (xmlNanoFTPCtxtPtr) xmlNanoFTPNewCtxt(NULL);
if (ctxt == NULL)
return(NULL);
ctxt->hostname = xmlMemStrdup(server);
if (ctxt->hostname == NULL) {
xmlNanoFTPFreeCtxt(ctxt);
return(NULL);
}
ctxt->port = port;
res = xmlNanoFTPConnect(ctxt);
if (res < 0) {
xmlNanoFTPFreeCtxt(ctxt);
return(NULL);
}
return(ctxt);
}
/**
* xmlNanoFTPCwd:
* @ctx: an FTP context
* @directory: a directory on the server
*
* Tries to change the remote directory
*
* Returns -1 in case of error, 1 if CWD worked, 0 if it failed
*/
int
xmlNanoFTPCwd(void *ctx, const char *directory) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
char buf[400];
int len;
int res;
if ((ctxt == NULL) || (ctxt->controlFd == INVALID_SOCKET)) return(-1);
if (directory == NULL) return 0;
/*
* Expected response code for CWD:
*
* CWD
* 250
* 500, 501, 502, 421, 530, 550
*/
snprintf(buf, sizeof(buf), "CWD %s\r\n", directory);
buf[sizeof(buf) - 1] = 0;
len = strlen(buf);
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "%s", buf);
#endif
res = send(ctxt->controlFd, SEND_ARG2_CAST buf, len, 0);
if (res < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "send failed");
return(res);
}
res = xmlNanoFTPGetResponse(ctxt);
if (res == 4) {
return(-1);
}
if (res == 2) return(1);
if (res == 5) {
return(0);
}
return(0);
}
/**
* xmlNanoFTPDele:
* @ctx: an FTP context
* @file: a file or directory on the server
*
* Tries to delete an item (file or directory) from server
*
* Returns -1 in case of error, 1 if DELE worked, 0 if it failed
*/
int
xmlNanoFTPDele(void *ctx, const char *file) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
char buf[400];
int len;
int res;
if ((ctxt == NULL) || (ctxt->controlFd == INVALID_SOCKET) ||
(file == NULL)) return(-1);
/*
* Expected response code for DELE:
*
* DELE
* 250
* 450, 550
* 500, 501, 502, 421, 530
*/
snprintf(buf, sizeof(buf), "DELE %s\r\n", file);
buf[sizeof(buf) - 1] = 0;
len = strlen(buf);
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "%s", buf);
#endif
res = send(ctxt->controlFd, SEND_ARG2_CAST buf, len, 0);
if (res < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "send failed");
return(res);
}
res = xmlNanoFTPGetResponse(ctxt);
if (res == 4) {
return(-1);
}
if (res == 2) return(1);
if (res == 5) {
return(0);
}
return(0);
}
/**
* xmlNanoFTPGetConnection:
* @ctx: an FTP context
*
* Try to open a data connection to the server. Currently only
* passive mode is supported.
*
* Returns -1 in case of error, 0 otherwise
*/
SOCKET
xmlNanoFTPGetConnection(void *ctx) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
char buf[200], *cur;
int len, i;
int res;
unsigned char ad[6], *adp, *portp;
unsigned int temp[6];
#ifdef SUPPORT_IP6
struct sockaddr_storage dataAddr;
#else
struct sockaddr_in dataAddr;
#endif
XML_SOCKLEN_T dataAddrLen;
if (ctxt == NULL) return INVALID_SOCKET;
memset (&dataAddr, 0, sizeof(dataAddr));
#ifdef SUPPORT_IP6
if ((ctxt->ftpAddr).ss_family == AF_INET6) {
ctxt->dataFd = socket (AF_INET6, SOCK_STREAM, IPPROTO_TCP);
((struct sockaddr_in6 *)&dataAddr)->sin6_family = AF_INET6;
dataAddrLen = sizeof(struct sockaddr_in6);
} else
#endif
{
ctxt->dataFd = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
((struct sockaddr_in *)&dataAddr)->sin_family = AF_INET;
dataAddrLen = sizeof (struct sockaddr_in);
}
if (ctxt->dataFd == INVALID_SOCKET) {
__xmlIOErr(XML_FROM_FTP, 0, "socket failed");
return INVALID_SOCKET;
}
if (ctxt->passive) {
#ifdef SUPPORT_IP6
if ((ctxt->ftpAddr).ss_family == AF_INET6)
snprintf (buf, sizeof(buf), "EPSV\r\n");
else
#endif
snprintf (buf, sizeof(buf), "PASV\r\n");
len = strlen (buf);
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "%s", buf);
#endif
res = send(ctxt->controlFd, SEND_ARG2_CAST buf, len, 0);
if (res < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "send failed");
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return INVALID_SOCKET;
}
res = xmlNanoFTPReadResponse(ctx);
if (res != 2) {
if (res == 5) {
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return INVALID_SOCKET;
} else {
/*
* retry with an active connection
*/
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
ctxt->passive = 0;
}
}
cur = &ctxt->controlBuf[ctxt->controlBufAnswer];
while (((*cur < '0') || (*cur > '9')) && *cur != '\0') cur++;
#ifdef SUPPORT_IP6
if ((ctxt->ftpAddr).ss_family == AF_INET6) {
if (sscanf (cur, "%u", &temp[0]) != 1) {
__xmlIOErr(XML_FROM_FTP, XML_FTP_EPSV_ANSWER,
"Invalid answer to EPSV\n");
if (ctxt->dataFd != INVALID_SOCKET) {
closesocket (ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
}
return INVALID_SOCKET;
}
memcpy (&((struct sockaddr_in6 *)&dataAddr)->sin6_addr, &((struct sockaddr_in6 *)&ctxt->ftpAddr)->sin6_addr, sizeof(struct in6_addr));
((struct sockaddr_in6 *)&dataAddr)->sin6_port = htons (temp[0]);
}
else
#endif
{
if (sscanf (cur, "%u,%u,%u,%u,%u,%u", &temp[0], &temp[1], &temp[2],
&temp[3], &temp[4], &temp[5]) != 6) {
__xmlIOErr(XML_FROM_FTP, XML_FTP_PASV_ANSWER,
"Invalid answer to PASV\n");
if (ctxt->dataFd != INVALID_SOCKET) {
closesocket (ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
}
return INVALID_SOCKET;
}
for (i=0; i<6; i++) ad[i] = (unsigned char) (temp[i] & 0xff);
memcpy (&((struct sockaddr_in *)&dataAddr)->sin_addr, &ad[0], 4);
memcpy (&((struct sockaddr_in *)&dataAddr)->sin_port, &ad[4], 2);
}
if (connect(ctxt->dataFd, (struct sockaddr *) &dataAddr, dataAddrLen) < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "Failed to create a data connection");
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return INVALID_SOCKET;
}
} else {
getsockname(ctxt->dataFd, (struct sockaddr *) &dataAddr, &dataAddrLen);
#ifdef SUPPORT_IP6
if ((ctxt->ftpAddr).ss_family == AF_INET6)
((struct sockaddr_in6 *)&dataAddr)->sin6_port = 0;
else
#endif
((struct sockaddr_in *)&dataAddr)->sin_port = 0;
if (bind(ctxt->dataFd, (struct sockaddr *) &dataAddr, dataAddrLen) < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "bind failed");
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return INVALID_SOCKET;
}
getsockname(ctxt->dataFd, (struct sockaddr *) &dataAddr, &dataAddrLen);
if (listen(ctxt->dataFd, 1) < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "listen failed");
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return INVALID_SOCKET;
}
#ifdef SUPPORT_IP6
if ((ctxt->ftpAddr).ss_family == AF_INET6) {
char buf6[INET6_ADDRSTRLEN];
inet_ntop (AF_INET6, &((struct sockaddr_in6 *)&dataAddr)->sin6_addr,
buf6, INET6_ADDRSTRLEN);
adp = (unsigned char *) buf6;
portp = (unsigned char *) &((struct sockaddr_in6 *)&dataAddr)->sin6_port;
snprintf (buf, sizeof(buf), "EPRT |2|%s|%s|\r\n", adp, portp);
} else
#endif
{
adp = (unsigned char *) &((struct sockaddr_in *)&dataAddr)->sin_addr;
portp = (unsigned char *) &((struct sockaddr_in *)&dataAddr)->sin_port;
snprintf (buf, sizeof(buf), "PORT %d,%d,%d,%d,%d,%d\r\n",
adp[0] & 0xff, adp[1] & 0xff, adp[2] & 0xff, adp[3] & 0xff,
portp[0] & 0xff, portp[1] & 0xff);
}
buf[sizeof(buf) - 1] = 0;
len = strlen(buf);
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "%s", buf);
#endif
res = send(ctxt->controlFd, SEND_ARG2_CAST buf, len, 0);
if (res < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "send failed");
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return INVALID_SOCKET;
}
res = xmlNanoFTPGetResponse(ctxt);
if (res != 2) {
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return INVALID_SOCKET;
}
}
return(ctxt->dataFd);
}
/**
* xmlNanoFTPCloseConnection:
* @ctx: an FTP context
*
* Close the data connection from the server
*
* Returns -1 in case of error, 0 otherwise
*/
int
xmlNanoFTPCloseConnection(void *ctx) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
int res;
fd_set rfd, efd;
struct timeval tv;
if ((ctxt == NULL) || (ctxt->controlFd == INVALID_SOCKET)) return(-1);
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
tv.tv_sec = 15;
tv.tv_usec = 0;
FD_ZERO(&rfd);
FD_SET(ctxt->controlFd, &rfd);
FD_ZERO(&efd);
FD_SET(ctxt->controlFd, &efd);
res = select(ctxt->controlFd + 1, &rfd, NULL, &efd, &tv);
if (res < 0) {
#ifdef DEBUG_FTP
perror("select");
#endif
closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
return(-1);
}
if (res == 0) {
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext,
"xmlNanoFTPCloseConnection: timeout\n");
#endif
closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
} else {
res = xmlNanoFTPGetResponse(ctxt);
if (res != 2) {
closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
return(-1);
}
}
return(0);
}
/**
* xmlNanoFTPParseList:
* @list: some data listing received from the server
* @callback: the user callback
* @userData: the user callback data
*
* Parse at most one entry from the listing.
*
* Returns -1 in case of error, the length of data parsed otherwise
*/
static int
xmlNanoFTPParseList(const char *list, ftpListCallback callback, void *userData) {
const char *cur = list;
char filename[151];
char attrib[11];
char owner[11];
char group[11];
char month[4];
int year = 0;
int minute = 0;
int hour = 0;
int day = 0;
unsigned long size = 0;
int links = 0;
int i;
if (!strncmp(cur, "total", 5)) {
cur += 5;
while (*cur == ' ') cur++;
while ((*cur >= '0') && (*cur <= '9'))
links = (links * 10) + (*cur++ - '0');
while ((*cur == ' ') || (*cur == '\n') || (*cur == '\r'))
cur++;
return(cur - list);
} else if (*list == '+') {
return(0);
} else {
while ((*cur == ' ') || (*cur == '\n') || (*cur == '\r'))
cur++;
if (*cur == 0) return(0);
i = 0;
while (*cur != ' ') {
if (i < 10)
attrib[i++] = *cur;
cur++;
if (*cur == 0) return(0);
}
attrib[10] = 0;
while (*cur == ' ') cur++;
if (*cur == 0) return(0);
while ((*cur >= '0') && (*cur <= '9'))
links = (links * 10) + (*cur++ - '0');
while (*cur == ' ') cur++;
if (*cur == 0) return(0);
i = 0;
while (*cur != ' ') {
if (i < 10)
owner[i++] = *cur;
cur++;
if (*cur == 0) return(0);
}
owner[i] = 0;
while (*cur == ' ') cur++;
if (*cur == 0) return(0);
i = 0;
while (*cur != ' ') {
if (i < 10)
group[i++] = *cur;
cur++;
if (*cur == 0) return(0);
}
group[i] = 0;
while (*cur == ' ') cur++;
if (*cur == 0) return(0);
while ((*cur >= '0') && (*cur <= '9'))
size = (size * 10) + (*cur++ - '0');
while (*cur == ' ') cur++;
if (*cur == 0) return(0);
i = 0;
while (*cur != ' ') {
if (i < 3)
month[i++] = *cur;
cur++;
if (*cur == 0) return(0);
}
month[i] = 0;
while (*cur == ' ') cur++;
if (*cur == 0) return(0);
while ((*cur >= '0') && (*cur <= '9'))
day = (day * 10) + (*cur++ - '0');
while (*cur == ' ') cur++;
if (*cur == 0) return(0);
if ((cur[1] == 0) || (cur[2] == 0)) return(0);
if ((cur[1] == ':') || (cur[2] == ':')) {
while ((*cur >= '0') && (*cur <= '9'))
hour = (hour * 10) + (*cur++ - '0');
if (*cur == ':') cur++;
while ((*cur >= '0') && (*cur <= '9'))
minute = (minute * 10) + (*cur++ - '0');
} else {
while ((*cur >= '0') && (*cur <= '9'))
year = (year * 10) + (*cur++ - '0');
}
while (*cur == ' ') cur++;
if (*cur == 0) return(0);
i = 0;
while ((*cur != '\n') && (*cur != '\r')) {
if (i < 150)
filename[i++] = *cur;
cur++;
if (*cur == 0) return(0);
}
filename[i] = 0;
if ((*cur != '\n') && (*cur != '\r'))
return(0);
while ((*cur == '\n') || (*cur == '\r'))
cur++;
}
if (callback != NULL) {
callback(userData, filename, attrib, owner, group, size, links,
year, month, day, hour, minute);
}
return(cur - list);
}
/**
* xmlNanoFTPList:
* @ctx: an FTP context
* @callback: the user callback
* @userData: the user callback data
* @filename: optional files to list
*
* Do a listing on the server. All files info are passed back
* in the callbacks.
*
* Returns -1 in case of error, 0 otherwise
*/
int
xmlNanoFTPList(void *ctx, ftpListCallback callback, void *userData,
const char *filename) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
char buf[4096 + 1];
int len, res;
int indx = 0, base;
fd_set rfd, efd;
struct timeval tv;
if (ctxt == NULL) return (-1);
if (filename == NULL) {
if (xmlNanoFTPCwd(ctxt, ctxt->path) < 1)
return(-1);
ctxt->dataFd = xmlNanoFTPGetConnection(ctxt);
if (ctxt->dataFd == INVALID_SOCKET)
return(-1);
snprintf(buf, sizeof(buf), "LIST -L\r\n");
} else {
if (filename[0] != '/') {
if (xmlNanoFTPCwd(ctxt, ctxt->path) < 1)
return(-1);
}
ctxt->dataFd = xmlNanoFTPGetConnection(ctxt);
if (ctxt->dataFd == INVALID_SOCKET)
return(-1);
snprintf(buf, sizeof(buf), "LIST -L %s\r\n", filename);
}
buf[sizeof(buf) - 1] = 0;
len = strlen(buf);
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "%s", buf);
#endif
res = send(ctxt->controlFd, SEND_ARG2_CAST buf, len, 0);
if (res < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "send failed");
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return(res);
}
res = xmlNanoFTPReadResponse(ctxt);
if (res != 1) {
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return(-res);
}
do {
tv.tv_sec = 1;
tv.tv_usec = 0;
FD_ZERO(&rfd);
FD_SET(ctxt->dataFd, &rfd);
FD_ZERO(&efd);
FD_SET(ctxt->dataFd, &efd);
res = select(ctxt->dataFd + 1, &rfd, NULL, &efd, &tv);
if (res < 0) {
#ifdef DEBUG_FTP
perror("select");
#endif
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return(-1);
}
if (res == 0) {
res = xmlNanoFTPCheckResponse(ctxt);
if (res < 0) {
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
ctxt->dataFd = INVALID_SOCKET;
return(-1);
}
if (res == 2) {
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return(0);
}
continue;
}
if ((len = recv(ctxt->dataFd, &buf[indx], sizeof(buf) - (indx + 1), 0)) < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "recv");
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
ctxt->dataFd = INVALID_SOCKET;
return(-1);
}
#ifdef DEBUG_FTP
write(1, &buf[indx], len);
#endif
indx += len;
buf[indx] = 0;
base = 0;
do {
res = xmlNanoFTPParseList(&buf[base], callback, userData);
base += res;
} while (res > 0);
memmove(&buf[0], &buf[base], indx - base);
indx -= base;
} while (len != 0);
xmlNanoFTPCloseConnection(ctxt);
return(0);
}
/**
* xmlNanoFTPGetSocket:
* @ctx: an FTP context
* @filename: the file to retrieve (or NULL if path is in context).
*
* Initiate fetch of the given file from the server.
*
* Returns the socket for the data connection, or <0 in case of error
*/
SOCKET
xmlNanoFTPGetSocket(void *ctx, const char *filename) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
char buf[300];
int res, len;
if (ctx == NULL)
return INVALID_SOCKET;
if ((filename == NULL) && (ctxt->path == NULL))
return INVALID_SOCKET;
ctxt->dataFd = xmlNanoFTPGetConnection(ctxt);
if (ctxt->dataFd == INVALID_SOCKET)
return INVALID_SOCKET;
snprintf(buf, sizeof(buf), "TYPE I\r\n");
len = strlen(buf);
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "%s", buf);
#endif
res = send(ctxt->controlFd, SEND_ARG2_CAST buf, len, 0);
if (res < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "send failed");
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return INVALID_SOCKET;
}
res = xmlNanoFTPReadResponse(ctxt);
if (res != 2) {
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return INVALID_SOCKET;
}
if (filename == NULL)
snprintf(buf, sizeof(buf), "RETR %s\r\n", ctxt->path);
else
snprintf(buf, sizeof(buf), "RETR %s\r\n", filename);
buf[sizeof(buf) - 1] = 0;
len = strlen(buf);
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "%s", buf);
#endif
res = send(ctxt->controlFd, SEND_ARG2_CAST buf, len, 0);
if (res < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "send failed");
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return INVALID_SOCKET;
}
res = xmlNanoFTPReadResponse(ctxt);
if (res != 1) {
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return INVALID_SOCKET;
}
return(ctxt->dataFd);
}
/**
* xmlNanoFTPGet:
* @ctx: an FTP context
* @callback: the user callback
* @userData: the user callback data
* @filename: the file to retrieve
*
* Fetch the given file from the server. All data are passed back
* in the callbacks. The last callback has a size of 0 block.
*
* Returns -1 in case of error, 0 otherwise
*/
int
xmlNanoFTPGet(void *ctx, ftpDataCallback callback, void *userData,
const char *filename) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
char buf[4096];
int len = 0, res;
fd_set rfd;
struct timeval tv;
if (ctxt == NULL) return(-1);
if ((filename == NULL) && (ctxt->path == NULL))
return(-1);
if (callback == NULL)
return(-1);
if (xmlNanoFTPGetSocket(ctxt, filename) == INVALID_SOCKET)
return(-1);
do {
tv.tv_sec = 1;
tv.tv_usec = 0;
FD_ZERO(&rfd);
FD_SET(ctxt->dataFd, &rfd);
res = select(ctxt->dataFd + 1, &rfd, NULL, NULL, &tv);
if (res < 0) {
#ifdef DEBUG_FTP
perror("select");
#endif
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return(-1);
}
if (res == 0) {
res = xmlNanoFTPCheckResponse(ctxt);
if (res < 0) {
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
ctxt->dataFd = INVALID_SOCKET;
return(-1);
}
if (res == 2) {
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return(0);
}
continue;
}
if ((len = recv(ctxt->dataFd, buf, sizeof(buf), 0)) < 0) {
__xmlIOErr(XML_FROM_FTP, 0, "recv failed");
callback(userData, buf, len);
closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
return(-1);
}
callback(userData, buf, len);
} while (len != 0);
return(xmlNanoFTPCloseConnection(ctxt));
}
/**
* xmlNanoFTPRead:
* @ctx: the FTP context
* @dest: a buffer
* @len: the buffer length
*
* This function tries to read @len bytes from the existing FTP connection
* and saves them in @dest. This is a blocking call.
*
* Returns the number of byte read. 0 is an indication of an end of connection.
* -1 indicates a parameter error.
*/
int
xmlNanoFTPRead(void *ctx, void *dest, int len) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
if (ctx == NULL) return(-1);
if (ctxt->dataFd == INVALID_SOCKET) return(0);
if (dest == NULL) return(-1);
if (len <= 0) return(0);
len = recv(ctxt->dataFd, dest, len, 0);
if (len <= 0) {
if (len < 0)
__xmlIOErr(XML_FROM_FTP, 0, "recv failed");
xmlNanoFTPCloseConnection(ctxt);
}
#ifdef DEBUG_FTP
xmlGenericError(xmlGenericErrorContext, "Recvd %d bytes\n", len);
#endif
return(len);
}
/**
* xmlNanoFTPOpen:
* @URL: the URL to the resource
*
* Start to fetch the given ftp:// resource
*
* Returns an FTP context, or NULL
*/
void*
xmlNanoFTPOpen(const char *URL) {
xmlNanoFTPCtxtPtr ctxt;
SOCKET sock;
xmlNanoFTPInit();
if (URL == NULL) return(NULL);
if (strncmp("ftp://", URL, 6)) return(NULL);
ctxt = (xmlNanoFTPCtxtPtr) xmlNanoFTPNewCtxt(URL);
if (ctxt == NULL) return(NULL);
if (xmlNanoFTPConnect(ctxt) < 0) {
xmlNanoFTPFreeCtxt(ctxt);
return(NULL);
}
sock = xmlNanoFTPGetSocket(ctxt, ctxt->path);
if (sock == INVALID_SOCKET) {
xmlNanoFTPFreeCtxt(ctxt);
return(NULL);
}
return(ctxt);
}
/**
* xmlNanoFTPClose:
* @ctx: an FTP context
*
* Close the connection and both control and transport
*
* Returns -1 in case of error, 0 otherwise
*/
int
xmlNanoFTPClose(void *ctx) {
xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
if (ctxt == NULL)
return(-1);
if (ctxt->dataFd != INVALID_SOCKET) {
closesocket(ctxt->dataFd);
ctxt->dataFd = INVALID_SOCKET;
}
if (ctxt->controlFd != INVALID_SOCKET) {
xmlNanoFTPQuit(ctxt);
closesocket(ctxt->controlFd);
ctxt->controlFd = INVALID_SOCKET;
}
xmlNanoFTPFreeCtxt(ctxt);
return(0);
}
#ifdef STANDALONE
/************************************************************************
* *
* Basic test in Standalone mode *
* *
************************************************************************/
static
void ftpList(void *userData, const char *filename, const char* attrib,
const char *owner, const char *group, unsigned long size, int links,
int year, const char *month, int day, int hour, int minute) {
xmlGenericError(xmlGenericErrorContext,
"%s %s %s %ld %s\n", attrib, owner, group, size, filename);
}
static
void ftpData(void *userData, const char *data, int len) {
if (userData == NULL) return;
if (len <= 0) {
fclose((FILE*)userData);
return;
}
fwrite(data, len, 1, (FILE*)userData);
}
int main(int argc, char **argv) {
void *ctxt;
FILE *output;
char *tstfile = NULL;
xmlNanoFTPInit();
if (argc > 1) {
ctxt = xmlNanoFTPNewCtxt(argv[1]);
if (xmlNanoFTPConnect(ctxt) < 0) {
xmlGenericError(xmlGenericErrorContext,
"Couldn't connect to %s\n", argv[1]);
exit(1);
}
if (argc > 2)
tstfile = argv[2];
} else
ctxt = xmlNanoFTPConnectTo("localhost", 0);
if (ctxt == NULL) {
xmlGenericError(xmlGenericErrorContext,
"Couldn't connect to localhost\n");
exit(1);
}
xmlNanoFTPList(ctxt, ftpList, NULL, tstfile);
output = fopen("/tmp/tstdata", "w");
if (output != NULL) {
if (xmlNanoFTPGet(ctxt, ftpData, (void *) output, tstfile) < 0)
xmlGenericError(xmlGenericErrorContext,
"Failed to get file\n");
}
xmlNanoFTPClose(ctxt);
exit(0);
}
#endif /* STANDALONE */
#else /* !LIBXML_FTP_ENABLED */
#ifdef STANDALONE
#include <stdio.h>
int main(int argc, char **argv) {
xmlGenericError(xmlGenericErrorContext,
"%s : FTP support not compiled in\n", argv[0]);
return(0);
}
#endif /* STANDALONE */
#endif /* LIBXML_FTP_ENABLED */
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