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nanoftp.c
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/*
* nanoftp.c: basic FTP client support
*
* Reference: RFC 959
*/
#ifdef TESTING
#define STANDALONE
#define HAVE_STDLIB_H
#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>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.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_ERRNO_H
#include <errno.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
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_STRINGS_H
#include <strings.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>
/* #define DEBUG_FTP 1 */
#ifdef STANDALONE
#ifndef DEBUG_FTP
#define DEBUG_FTP 1
#endif
#endif
#if defined(_WIN32) && !defined(__CYGWIN__)
#include <wsockcompat.h>
#endif
/**
* A couple portability macros
*/
#ifndef _WINSOCKAPI_
#if !defined(__BEOS__) || defined(__HAIKU__)
#define closesocket(s) close(s)
#endif
#endif
#ifdef __BEOS__
#ifndef PF_INET
#define PF_INET AF_INET
#endif
#endif
#ifdef _AIX
#ifdef HAVE_BROKEN_SS_FAMILY
#define ss_family __ss_family
#endif
#endif
#ifndef XML_SOCKLEN_T
#define XML_SOCKLEN_T unsigned int
#endif
#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| | |
* -------------- -------- |