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688 lines
19 KiB
C
688 lines
19 KiB
C
/* $Id: miniupnpc.c,v 1.135 2015/07/23 20:40:08 nanard Exp $ */
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/* vim: tabstop=4 shiftwidth=4 noexpandtab */
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/* Project : miniupnp
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* Web : http://miniupnp.free.fr/
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* Author : Thomas BERNARD
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* copyright (c) 2005-2015 Thomas Bernard
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* This software is subjet to the conditions detailed in the
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* provided LICENSE file. */
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#ifdef _WIN32
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/* Win32 Specific includes and defines */
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#include <io.h>
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#include <iphlpapi.h>
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#define snprintf _snprintf
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#define strdup _strdup
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#ifndef strncasecmp
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#if defined(_MSC_VER) && (_MSC_VER >= 1400)
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#define strncasecmp _memicmp
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#else /* defined(_MSC_VER) && (_MSC_VER >= 1400) */
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#define strncasecmp memicmp
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#endif /* defined(_MSC_VER) && (_MSC_VER >= 1400) */
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#endif /* #ifndef strncasecmp */
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#define MAXHOSTNAMELEN 64
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#else /* #ifdef _WIN32 */
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/* Standard POSIX includes */
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#include <unistd.h>
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#if defined(__amigaos__) && !defined(__amigaos4__)
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/* Amiga OS 3 specific stuff */
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#define socklen_t int
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#else
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#include <sys/select.h>
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#endif
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <net/if.h>
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#if !defined(__amigaos__) && !defined(__amigaos4__)
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#include <poll.h>
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#endif
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#include <strings.h>
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#include <errno.h>
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#define closesocket close
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#endif /* #else _WIN32 */
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#ifdef __GNU__
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#define MAXHOSTNAMELEN 64
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#endif
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#include "miniupnpc.h"
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#include "minissdpc.h"
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#include "miniwget.h"
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#include "minisoap.h"
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#include "minixml.h"
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#include "upnpcommands.h"
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#include "connecthostport.h"
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/* compare the begining of a string with a constant string */
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#define COMPARE(str, cstr) (0==memcmp(str, cstr, sizeof(cstr) - 1))
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#ifndef MAXHOSTNAMELEN
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#define MAXHOSTNAMELEN 64
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#endif
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#define SOAPPREFIX "s"
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#define SERVICEPREFIX "u"
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#define SERVICEPREFIX2 'u'
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/* root description parsing */
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MINIUPNP_LIBSPEC void parserootdesc(const char * buffer, int bufsize, struct IGDdatas * data)
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{
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struct xmlparser parser;
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/* xmlparser object */
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parser.xmlstart = buffer;
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parser.xmlsize = bufsize;
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parser.data = data;
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parser.starteltfunc = IGDstartelt;
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parser.endeltfunc = IGDendelt;
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parser.datafunc = IGDdata;
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parser.attfunc = 0;
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parsexml(&parser);
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#ifdef DEBUG
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printIGD(data);
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#endif
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}
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/* simpleUPnPcommand2 :
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* not so simple !
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* return values :
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* pointer - OK
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* NULL - error */
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char * simpleUPnPcommand2(int s, const char * url, const char * service,
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const char * action, struct UPNParg * args,
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int * bufsize, const char * httpversion)
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{
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char hostname[MAXHOSTNAMELEN+1];
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unsigned short port = 0;
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char * path;
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char soapact[128];
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char soapbody[2048];
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int soapbodylen;
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char * buf;
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int n;
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*bufsize = 0;
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snprintf(soapact, sizeof(soapact), "%s#%s", service, action);
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if(args==NULL)
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{
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soapbodylen = snprintf(soapbody, sizeof(soapbody),
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"<?xml version=\"1.0\"?>\r\n"
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"<" SOAPPREFIX ":Envelope "
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"xmlns:" SOAPPREFIX "=\"http://schemas.xmlsoap.org/soap/envelope/\" "
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SOAPPREFIX ":encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">"
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"<" SOAPPREFIX ":Body>"
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"<" SERVICEPREFIX ":%s xmlns:" SERVICEPREFIX "=\"%s\">"
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"</" SERVICEPREFIX ":%s>"
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"</" SOAPPREFIX ":Body></" SOAPPREFIX ":Envelope>"
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"\r\n", action, service, action);
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if ((unsigned int)soapbodylen >= sizeof(soapbody))
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return NULL;
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}
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else
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{
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char * p;
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const char * pe, * pv;
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const char * const pend = soapbody + sizeof(soapbody);
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soapbodylen = snprintf(soapbody, sizeof(soapbody),
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"<?xml version=\"1.0\"?>\r\n"
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"<" SOAPPREFIX ":Envelope "
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"xmlns:" SOAPPREFIX "=\"http://schemas.xmlsoap.org/soap/envelope/\" "
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SOAPPREFIX ":encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">"
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"<" SOAPPREFIX ":Body>"
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"<" SERVICEPREFIX ":%s xmlns:" SERVICEPREFIX "=\"%s\">",
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action, service);
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if ((unsigned int)soapbodylen >= sizeof(soapbody))
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return NULL;
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p = soapbody + soapbodylen;
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while(args->elt)
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{
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if(p >= pend) /* check for space to write next byte */
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return NULL;
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*(p++) = '<';
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pe = args->elt;
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while(p < pend && *pe)
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*(p++) = *(pe++);
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if(p >= pend) /* check for space to write next byte */
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return NULL;
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*(p++) = '>';
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if((pv = args->val))
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{
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while(p < pend && *pv)
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*(p++) = *(pv++);
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}
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if((p+2) > pend) /* check for space to write next 2 bytes */
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return NULL;
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*(p++) = '<';
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*(p++) = '/';
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pe = args->elt;
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while(p < pend && *pe)
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*(p++) = *(pe++);
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if(p >= pend) /* check for space to write next byte */
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return NULL;
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*(p++) = '>';
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args++;
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}
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if((p+4) > pend) /* check for space to write next 4 bytes */
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return NULL;
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*(p++) = '<';
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*(p++) = '/';
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*(p++) = SERVICEPREFIX2;
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*(p++) = ':';
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pe = action;
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while(p < pend && *pe)
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*(p++) = *(pe++);
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strncpy(p, "></" SOAPPREFIX ":Body></" SOAPPREFIX ":Envelope>\r\n",
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pend - p);
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if(soapbody[sizeof(soapbody)-1]) /* strncpy pads buffer with 0s, so if it doesn't end in 0, could not fit full string */
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return NULL;
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}
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if(!parseURL(url, hostname, &port, &path, NULL)) return NULL;
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if(s < 0) {
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s = connecthostport(hostname, port, 0);
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if(s < 0) {
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/* failed to connect */
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return NULL;
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}
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}
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n = soapPostSubmit(s, path, hostname, port, soapact, soapbody, httpversion);
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if(n<=0) {
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#ifdef DEBUG
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printf("Error sending SOAP request\n");
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#endif
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closesocket(s);
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return NULL;
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}
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buf = getHTTPResponse(s, bufsize);
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#ifdef DEBUG
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if(*bufsize > 0 && buf)
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{
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printf("SOAP Response :\n%.*s\n", *bufsize, buf);
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}
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#endif
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closesocket(s);
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return buf;
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}
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/* simpleUPnPcommand :
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* not so simple !
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* return values :
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* pointer - OK
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* NULL - error */
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char * simpleUPnPcommand(int s, const char * url, const char * service,
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const char * action, struct UPNParg * args,
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int * bufsize)
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{
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char * buf;
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#if 1
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buf = simpleUPnPcommand2(s, url, service, action, args, bufsize, "1.1");
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#else
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buf = simpleUPnPcommand2(s, url, service, action, args, bufsize, "1.0");
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if (!buf || *bufsize == 0)
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{
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#if DEBUG
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printf("Error or no result from SOAP request; retrying with HTTP/1.1\n");
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#endif
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buf = simpleUPnPcommand2(s, url, service, action, args, bufsize, "1.1");
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}
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#endif
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return buf;
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}
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/* upnpDiscoverDevices() :
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* return a chained list of all devices found or NULL if
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* no devices was found.
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* It is up to the caller to free the chained list
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* delay is in millisecond (poll).
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* UDA v1.1 says :
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* The TTL for the IP packet SHOULD default to 2 and
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* SHOULD be configurable. */
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MINIUPNP_LIBSPEC struct UPNPDev *
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upnpDiscoverDevices(const char * const deviceTypes[],
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int delay, const char * multicastif,
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const char * minissdpdsock, int localport,
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int ipv6, unsigned char ttl,
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int * error,
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int searchalltypes)
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{
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struct UPNPDev * tmp;
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struct UPNPDev * devlist = 0;
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#if !defined(_WIN32) && !defined(__amigaos__) && !defined(__amigaos4__)
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int deviceIndex;
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#endif /* !defined(_WIN32) && !defined(__amigaos__) && !defined(__amigaos4__) */
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if(error)
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*error = UPNPDISCOVER_UNKNOWN_ERROR;
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#if !defined(_WIN32) && !defined(__amigaos__) && !defined(__amigaos4__)
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/* first try to get infos from minissdpd ! */
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if(!minissdpdsock)
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minissdpdsock = "/var/run/minissdpd.sock";
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for(deviceIndex = 0; deviceTypes[deviceIndex]; deviceIndex++) {
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struct UPNPDev * minissdpd_devlist;
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int only_rootdevice = 1;
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minissdpd_devlist = getDevicesFromMiniSSDPD(deviceTypes[deviceIndex],
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minissdpdsock, 0);
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if(minissdpd_devlist) {
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#ifdef DEBUG
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printf("returned by MiniSSDPD: %s\t%s\n",
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minissdpd_devlist->st, minissdpd_devlist->descURL);
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#endif /* DEBUG */
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if(!strstr(minissdpd_devlist->st, "rootdevice"))
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only_rootdevice = 0;
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for(tmp = minissdpd_devlist; tmp->pNext != NULL; tmp = tmp->pNext) {
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#ifdef DEBUG
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printf("returned by MiniSSDPD: %s\t%s\n",
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tmp->pNext->st, tmp->pNext->descURL);
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#endif /* DEBUG */
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if(!strstr(tmp->st, "rootdevice"))
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only_rootdevice = 0;
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}
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tmp->pNext = devlist;
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devlist = minissdpd_devlist;
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if(!searchalltypes && !only_rootdevice)
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break;
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}
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}
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for(tmp = devlist; tmp != NULL; tmp = tmp->pNext) {
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/* We return what we have found if it was not only a rootdevice */
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if(!strstr(tmp->st, "rootdevice")) {
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if(error)
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*error = UPNPDISCOVER_SUCCESS;
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return devlist;
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}
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}
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#endif /* !defined(_WIN32) && !defined(__amigaos__) && !defined(__amigaos4__) */
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/* direct discovery if minissdpd responses are not sufficient */
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{
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struct UPNPDev * discovered_devlist;
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discovered_devlist = ssdpDiscoverDevices(deviceTypes, delay, multicastif, localport,
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ipv6, ttl, error, searchalltypes);
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if(devlist == NULL)
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devlist = discovered_devlist;
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else {
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for(tmp = devlist; tmp->pNext != NULL; tmp = tmp->pNext);
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tmp->pNext = discovered_devlist;
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}
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}
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return devlist;
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}
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/* upnpDiscover() Discover IGD device */
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MINIUPNP_LIBSPEC struct UPNPDev *
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upnpDiscover(int delay, const char * multicastif,
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const char * minissdpdsock, int localport,
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int ipv6, unsigned char ttl,
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int * error)
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{
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static const char * const deviceList[] = {
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#if 0
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"urn:schemas-upnp-org:device:InternetGatewayDevice:2",
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"urn:schemas-upnp-org:service:WANIPConnection:2",
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#endif
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"urn:schemas-upnp-org:device:InternetGatewayDevice:1",
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"urn:schemas-upnp-org:service:WANIPConnection:1",
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"urn:schemas-upnp-org:service:WANPPPConnection:1",
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"upnp:rootdevice",
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/*"ssdp:all",*/
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0
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};
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return upnpDiscoverDevices(deviceList,
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delay, multicastif, minissdpdsock, localport,
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ipv6, ttl, error, 0);
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}
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/* upnpDiscoverAll() Discover all UPnP devices */
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MINIUPNP_LIBSPEC struct UPNPDev *
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upnpDiscoverAll(int delay, const char * multicastif,
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const char * minissdpdsock, int localport,
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int ipv6, unsigned char ttl,
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int * error)
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{
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static const char * const deviceList[] = {
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/*"upnp:rootdevice",*/
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"ssdp:all",
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0
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};
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return upnpDiscoverDevices(deviceList,
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delay, multicastif, minissdpdsock, localport,
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ipv6, ttl, error, 0);
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}
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/* upnpDiscoverDevice() Discover a specific device */
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MINIUPNP_LIBSPEC struct UPNPDev *
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upnpDiscoverDevice(const char * device, int delay, const char * multicastif,
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const char * minissdpdsock, int localport,
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int ipv6, unsigned char ttl,
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int * error)
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{
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const char * const deviceList[] = {
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device,
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0
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};
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return upnpDiscoverDevices(deviceList,
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delay, multicastif, minissdpdsock, localport,
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ipv6, ttl, error, 0);
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}
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static char *
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build_absolute_url(const char * baseurl, const char * descURL,
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const char * url, unsigned int scope_id)
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{
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int l, n;
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char * s;
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const char * base;
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char * p;
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#if defined(IF_NAMESIZE) && !defined(_WIN32)
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char ifname[IF_NAMESIZE];
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#else /* defined(IF_NAMESIZE) && !defined(_WIN32) */
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char scope_str[8];
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#endif /* defined(IF_NAMESIZE) && !defined(_WIN32) */
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if( (url[0] == 'h')
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&&(url[1] == 't')
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&&(url[2] == 't')
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&&(url[3] == 'p')
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&&(url[4] == ':')
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&&(url[5] == '/')
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&&(url[6] == '/'))
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return strdup(url);
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base = (baseurl[0] == '\0') ? descURL : baseurl;
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n = strlen(base);
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if(n > 7) {
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p = strchr(base + 7, '/');
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if(p)
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n = p - base;
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}
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l = n + strlen(url) + 1;
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if(url[0] != '/')
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l++;
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if(scope_id != 0) {
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#if defined(IF_NAMESIZE) && !defined(_WIN32)
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if(if_indextoname(scope_id, ifname)) {
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l += 3 + strlen(ifname); /* 3 == strlen(%25) */
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}
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#else /* defined(IF_NAMESIZE) && !defined(_WIN32) */
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/* under windows, scope is numerical */
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l += 3 + snprintf(scope_str, sizeof(scope_str), "%u", scope_id);
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#endif /* defined(IF_NAMESIZE) && !defined(_WIN32) */
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}
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s = malloc(l);
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if(s == NULL) return NULL;
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memcpy(s, base, n);
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if(scope_id != 0) {
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s[n] = '\0';
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if(0 == memcmp(s, "http://[fe80:", 13)) {
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/* this is a linklocal IPv6 address */
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p = strchr(s, ']');
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if(p) {
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/* insert %25<scope> into URL */
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#if defined(IF_NAMESIZE) && !defined(_WIN32)
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memmove(p + 3 + strlen(ifname), p, strlen(p) + 1);
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memcpy(p, "%25", 3);
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memcpy(p + 3, ifname, strlen(ifname));
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n += 3 + strlen(ifname);
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#else /* defined(IF_NAMESIZE) && !defined(_WIN32) */
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memmove(p + 3 + strlen(scope_str), p, strlen(p) + 1);
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memcpy(p, "%25", 3);
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memcpy(p + 3, scope_str, strlen(scope_str));
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n += 3 + strlen(scope_str);
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#endif /* defined(IF_NAMESIZE) && !defined(_WIN32) */
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}
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}
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}
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if(url[0] != '/')
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s[n++] = '/';
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memcpy(s + n, url, l - n);
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return s;
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}
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/* Prepare the Urls for usage...
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*/
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MINIUPNP_LIBSPEC void
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GetUPNPUrls(struct UPNPUrls * urls, struct IGDdatas * data,
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const char * descURL, unsigned int scope_id)
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{
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/* strdup descURL */
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urls->rootdescURL = strdup(descURL);
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/* get description of WANIPConnection */
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urls->ipcondescURL = build_absolute_url(data->urlbase, descURL,
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data->first.scpdurl, scope_id);
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urls->controlURL = build_absolute_url(data->urlbase, descURL,
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data->first.controlurl, scope_id);
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urls->controlURL_CIF = build_absolute_url(data->urlbase, descURL,
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data->CIF.controlurl, scope_id);
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urls->controlURL_6FC = build_absolute_url(data->urlbase, descURL,
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data->IPv6FC.controlurl, scope_id);
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#ifdef DEBUG
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printf("urls->ipcondescURL='%s'\n", urls->ipcondescURL);
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printf("urls->controlURL='%s'\n", urls->controlURL);
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printf("urls->controlURL_CIF='%s'\n", urls->controlURL_CIF);
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printf("urls->controlURL_6FC='%s'\n", urls->controlURL_6FC);
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#endif
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}
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MINIUPNP_LIBSPEC void
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|
FreeUPNPUrls(struct UPNPUrls * urls)
|
|
{
|
|
if(!urls)
|
|
return;
|
|
free(urls->controlURL);
|
|
urls->controlURL = 0;
|
|
free(urls->ipcondescURL);
|
|
urls->ipcondescURL = 0;
|
|
free(urls->controlURL_CIF);
|
|
urls->controlURL_CIF = 0;
|
|
free(urls->controlURL_6FC);
|
|
urls->controlURL_6FC = 0;
|
|
free(urls->rootdescURL);
|
|
urls->rootdescURL = 0;
|
|
}
|
|
|
|
int
|
|
UPNPIGD_IsConnected(struct UPNPUrls * urls, struct IGDdatas * data)
|
|
{
|
|
char status[64];
|
|
unsigned int uptime;
|
|
status[0] = '\0';
|
|
UPNP_GetStatusInfo(urls->controlURL, data->first.servicetype,
|
|
status, &uptime, NULL);
|
|
if(0 == strcmp("Connected", status))
|
|
return 1;
|
|
else if(0 == strcmp("Up", status)) /* Also accept "Up" */
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* UPNP_GetValidIGD() :
|
|
* return values :
|
|
* -1 = Internal error
|
|
* 0 = NO IGD found
|
|
* 1 = A valid connected IGD has been found
|
|
* 2 = A valid IGD has been found but it reported as
|
|
* not connected
|
|
* 3 = an UPnP device has been found but was not recognized as an IGD
|
|
*
|
|
* In any positive non zero return case, the urls and data structures
|
|
* passed as parameters are set. Donc forget to call FreeUPNPUrls(urls) to
|
|
* free allocated memory.
|
|
*/
|
|
MINIUPNP_LIBSPEC int
|
|
UPNP_GetValidIGD(struct UPNPDev * devlist,
|
|
struct UPNPUrls * urls,
|
|
struct IGDdatas * data,
|
|
char * lanaddr, int lanaddrlen)
|
|
{
|
|
struct xml_desc {
|
|
char * xml;
|
|
int size;
|
|
int is_igd;
|
|
} * desc = NULL;
|
|
struct UPNPDev * dev;
|
|
int ndev = 0;
|
|
int i;
|
|
int state = -1; /* state 1 : IGD connected. State 2 : IGD. State 3 : anything */
|
|
int n_igd = 0;
|
|
char extIpAddr[16];
|
|
char myLanAddr[40];
|
|
if(!devlist)
|
|
{
|
|
#ifdef DEBUG
|
|
printf("Empty devlist\n");
|
|
#endif
|
|
return 0;
|
|
}
|
|
/* counting total number of devices in the list */
|
|
for(dev = devlist; dev; dev = dev->pNext)
|
|
ndev++;
|
|
if(ndev > 0)
|
|
{
|
|
desc = calloc(ndev, sizeof(struct xml_desc));
|
|
if(!desc)
|
|
return -1; /* memory allocation error */
|
|
}
|
|
/* Step 1 : downloading descriptions and testing type */
|
|
for(dev = devlist, i = 0; dev; dev = dev->pNext, i++)
|
|
{
|
|
/* we should choose an internet gateway device.
|
|
* with st == urn:schemas-upnp-org:device:InternetGatewayDevice:1 */
|
|
desc[i].xml = miniwget_getaddr(dev->descURL, &(desc[i].size),
|
|
myLanAddr, sizeof(myLanAddr),
|
|
dev->scope_id);
|
|
#ifdef DEBUG
|
|
if(!desc[i].xml)
|
|
{
|
|
printf("error getting XML description %s\n", dev->descURL);
|
|
}
|
|
#endif
|
|
if(desc[i].xml)
|
|
{
|
|
memset(data, 0, sizeof(struct IGDdatas));
|
|
memset(urls, 0, sizeof(struct UPNPUrls));
|
|
parserootdesc(desc[i].xml, desc[i].size, data);
|
|
if(COMPARE(data->CIF.servicetype,
|
|
"urn:schemas-upnp-org:service:WANCommonInterfaceConfig:"))
|
|
{
|
|
desc[i].is_igd = 1;
|
|
n_igd++;
|
|
if(lanaddr)
|
|
strncpy(lanaddr, myLanAddr, lanaddrlen);
|
|
}
|
|
}
|
|
}
|
|
/* iterate the list to find a device depending on state */
|
|
for(state = 1; state <= 3; state++)
|
|
{
|
|
for(dev = devlist, i = 0; dev; dev = dev->pNext, i++)
|
|
{
|
|
if(desc[i].xml)
|
|
{
|
|
memset(data, 0, sizeof(struct IGDdatas));
|
|
memset(urls, 0, sizeof(struct UPNPUrls));
|
|
parserootdesc(desc[i].xml, desc[i].size, data);
|
|
if(desc[i].is_igd || state >= 3 )
|
|
{
|
|
GetUPNPUrls(urls, data, dev->descURL, dev->scope_id);
|
|
|
|
/* in state 2 and 3 we dont test if device is connected ! */
|
|
if(state >= 2)
|
|
goto free_and_return;
|
|
#ifdef DEBUG
|
|
printf("UPNPIGD_IsConnected(%s) = %d\n",
|
|
urls->controlURL,
|
|
UPNPIGD_IsConnected(urls, data));
|
|
#endif
|
|
/* checks that status is connected AND there is a external IP address assigned */
|
|
if(UPNPIGD_IsConnected(urls, data)
|
|
&& (UPNP_GetExternalIPAddress(urls->controlURL, data->first.servicetype, extIpAddr) == 0))
|
|
goto free_and_return;
|
|
FreeUPNPUrls(urls);
|
|
if(data->second.servicetype[0] != '\0') {
|
|
#ifdef DEBUG
|
|
printf("We tried %s, now we try %s !\n",
|
|
data->first.servicetype, data->second.servicetype);
|
|
#endif
|
|
/* swaping WANPPPConnection and WANIPConnection ! */
|
|
memcpy(&data->tmp, &data->first, sizeof(struct IGDdatas_service));
|
|
memcpy(&data->first, &data->second, sizeof(struct IGDdatas_service));
|
|
memcpy(&data->second, &data->tmp, sizeof(struct IGDdatas_service));
|
|
GetUPNPUrls(urls, data, dev->descURL, dev->scope_id);
|
|
#ifdef DEBUG
|
|
printf("UPNPIGD_IsConnected(%s) = %d\n",
|
|
urls->controlURL,
|
|
UPNPIGD_IsConnected(urls, data));
|
|
#endif
|
|
if(UPNPIGD_IsConnected(urls, data)
|
|
&& (UPNP_GetExternalIPAddress(urls->controlURL, data->first.servicetype, extIpAddr) == 0))
|
|
goto free_and_return;
|
|
FreeUPNPUrls(urls);
|
|
}
|
|
}
|
|
memset(data, 0, sizeof(struct IGDdatas));
|
|
}
|
|
}
|
|
}
|
|
state = 0;
|
|
free_and_return:
|
|
if(desc) {
|
|
for(i = 0; i < ndev; i++) {
|
|
if(desc[i].xml) {
|
|
free(desc[i].xml);
|
|
}
|
|
}
|
|
free(desc);
|
|
}
|
|
return state;
|
|
}
|
|
|
|
/* UPNP_GetIGDFromUrl()
|
|
* Used when skipping the discovery process.
|
|
* return value :
|
|
* 0 - Not ok
|
|
* 1 - OK */
|
|
int
|
|
UPNP_GetIGDFromUrl(const char * rootdescurl,
|
|
struct UPNPUrls * urls,
|
|
struct IGDdatas * data,
|
|
char * lanaddr, int lanaddrlen)
|
|
{
|
|
char * descXML;
|
|
int descXMLsize = 0;
|
|
descXML = miniwget_getaddr(rootdescurl, &descXMLsize,
|
|
lanaddr, lanaddrlen, 0);
|
|
if(descXML) {
|
|
memset(data, 0, sizeof(struct IGDdatas));
|
|
memset(urls, 0, sizeof(struct UPNPUrls));
|
|
parserootdesc(descXML, descXMLsize, data);
|
|
free(descXML);
|
|
descXML = NULL;
|
|
GetUPNPUrls(urls, data, rootdescurl, 0);
|
|
return 1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|