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transmission/third-party/miniupnp/miniupnpc.c

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/* $Id: miniupnpc.c,v 1.63 2009/08/07 14:44:50 nanard Exp $ */
/* Project : miniupnp
* Author : Thomas BERNARD
* copyright (c) 2005-2009 Thomas Bernard
* This software is subjet to the conditions detailed in the
* provided LICENCE file. */
#define __EXTENSIONS__ 1
#ifndef MACOSX
#if !defined(_XOPEN_SOURCE) && !defined(__OpenBSD__) && !defined(__NetBSD__)
#ifndef __cplusplus
#define _XOPEN_SOURCE 600
#endif
#endif
#ifndef __BSD_VISIBLE
#define __BSD_VISIBLE 1
#endif
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifdef WIN32
/* Win32 Specific includes and defines */
#include <winsock2.h>
#include <ws2tcpip.h>
#include <io.h>
#define snprintf _snprintf
#if defined(_MSC_VER) && (_MSC_VER >= 1400)
#define strncasecmp _memicmp
#else
#define strncasecmp memicmp
#endif
#define MAXHOSTNAMELEN 64
#else
/* Standard POSIX includes */
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <poll.h>
#include <netdb.h>
#include <strings.h>
#include <errno.h>
#define closesocket close
#define MINIUPNPC_IGNORE_EINTR
#endif
#ifdef MINIUPNPC_SET_SOCKET_TIMEOUT
#include <sys/time.h>
#endif
#include "miniupnpc.h"
#include "minissdpc.h"
#include "miniwget.h"
#include "minisoap.h"
#include "minixml.h"
#include "upnpcommands.h"
#ifdef WIN32
#define PRINT_SOCKET_ERROR(x) printf("Socket error: %s, %d\n", x, WSAGetLastError());
#else
#define PRINT_SOCKET_ERROR(x) perror(x)
#endif
#define SOAPPREFIX "s"
#define SERVICEPREFIX "u"
#define SERVICEPREFIX2 'u'
/* root description parsing */
LIBSPEC void parserootdesc(const char * buffer, int bufsize, struct IGDdatas * data)
{
struct xmlparser parser;
/* xmlparser object */
parser.xmlstart = buffer;
parser.xmlsize = bufsize;
parser.data = data;
parser.starteltfunc = IGDstartelt;
parser.endeltfunc = IGDendelt;
parser.datafunc = IGDdata;
parser.attfunc = 0;
parsexml(&parser);
#ifdef DEBUG
printIGD(data);
#endif
}
/* Content-length: nnn */
static int getcontentlenfromline(const char * p, int n)
{
static const char contlenstr[] = "content-length";
const char * p2 = contlenstr;
int a = 0;
while(*p2)
{
if(n==0)
return -1;
if(*p2 != *p && *p2 != (*p + 32))
return -1;
p++; p2++; n--;
}
if(n==0)
return -1;
if(*p != ':')
return -1;
p++; n--;
while(*p == ' ')
{
if(n==0)
return -1;
p++; n--;
}
while(*p >= '0' && *p <= '9')
{
if(n==0)
return -1;
a = (a * 10) + (*p - '0');
p++; n--;
}
return a;
}
static void
getContentLengthAndHeaderLength(char * p, int n,
int * contentlen, int * headerlen)
{
char * line;
int linelen;
int r;
line = p;
while(line < p + n)
{
linelen = 0;
while(line[linelen] != '\r' && line[linelen] != '\r')
{
if(line+linelen >= p+n)
return;
linelen++;
}
r = getcontentlenfromline(line, linelen);
if(r>0)
*contentlen = r;
line = line + linelen + 2;
if(line[0] == '\r' && line[1] == '\n')
{
*headerlen = (line - p) + 2;
return;
}
}
}
/* simpleUPnPcommand :
* not so simple !
* return values :
* 0 - OK
* -1 - error */
int simpleUPnPcommand(int s, const char * url, const char * service,
const char * action, struct UPNParg * args,
char * buffer, int * bufsize)
{
struct sockaddr_in dest;
char hostname[MAXHOSTNAMELEN+1];
unsigned short port = 0;
char * path;
char soapact[128];
char soapbody[2048];
char * buf;
int buffree;
int n;
int contentlen, headerlen; /* for the response */
#ifdef MINIUPNPC_SET_SOCKET_TIMEOUT
struct timeval timeout;
#endif
snprintf(soapact, sizeof(soapact), "%s#%s", service, action);
if(args==NULL)
{
/*soapbodylen = */snprintf(soapbody, sizeof(soapbody),
"<?xml version=\"1.0\"?>\r\n"
"<" SOAPPREFIX ":Envelope "
"xmlns:" SOAPPREFIX "=\"http://schemas.xmlsoap.org/soap/envelope/\" "
SOAPPREFIX ":encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">"
"<" SOAPPREFIX ":Body>"
"<" SERVICEPREFIX ":%s xmlns:" SERVICEPREFIX "=\"%s\">"
"</" SERVICEPREFIX ":%s>"
"</" SOAPPREFIX ":Body></" SOAPPREFIX ":Envelope>"
"\r\n", action, service, action);
}
else
{
char * p;
const char * pe, * pv;
int soapbodylen;
soapbodylen = snprintf(soapbody, sizeof(soapbody),
"<?xml version=\"1.0\"?>\r\n"
"<" SOAPPREFIX ":Envelope "
"xmlns:" SOAPPREFIX "=\"http://schemas.xmlsoap.org/soap/envelope/\" "
SOAPPREFIX ":encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">"
"<" SOAPPREFIX ":Body>"
"<" SERVICEPREFIX ":%s xmlns:" SERVICEPREFIX "=\"%s\">",
action, service);
p = soapbody + soapbodylen;
while(args->elt)
{
/* check that we are never overflowing the string... */
if(soapbody + sizeof(soapbody) <= p + 100)
{
/* we keep a margin of at least 100 bytes */
*bufsize = 0;
return -1;
}
*(p++) = '<';
pe = args->elt;
while(*pe)
*(p++) = *(pe++);
*(p++) = '>';
if((pv = args->val))
{
while(*pv)
*(p++) = *(pv++);
}
*(p++) = '<';
*(p++) = '/';
pe = args->elt;
while(*pe)
*(p++) = *(pe++);
*(p++) = '>';
args++;
}
*(p++) = '<';
*(p++) = '/';
*(p++) = SERVICEPREFIX2;
*(p++) = ':';
pe = action;
while(*pe)
*(p++) = *(pe++);
strncpy(p, "></" SOAPPREFIX ":Body></" SOAPPREFIX ":Envelope>\r\n",
soapbody + sizeof(soapbody) - p);
}
if(!parseURL(url, hostname, &port, &path)) return -1;
if(s<0)
{
s = socket(PF_INET, SOCK_STREAM, 0);
if(s<0)
{
PRINT_SOCKET_ERROR("socket");
*bufsize = 0;
return -1;
}
#ifdef MINIUPNPC_SET_SOCKET_TIMEOUT
/* setting a 3 seconds timeout for the connect() call */
timeout.tv_sec = 3;
timeout.tv_usec = 0;
if(setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(struct timeval)) < 0)
{
PRINT_SOCKET_ERROR("setsockopt");
}
timeout.tv_sec = 3;
timeout.tv_usec = 0;
if(setsockopt(s, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(struct timeval)) < 0)
{
PRINT_SOCKET_ERROR("setsockopt");
}
#endif
dest.sin_family = AF_INET;
dest.sin_port = htons(port);
dest.sin_addr.s_addr = inet_addr(hostname);
#ifdef MINIUPNPC_IGNORE_EINTR
do {
#endif
n = connect(s, (struct sockaddr *)&dest, sizeof(struct sockaddr));
#ifdef MINIUPNPC_IGNORE_EINTR
} while(n < 0 && errno == EINTR);
#endif
if(n < 0)
{
PRINT_SOCKET_ERROR("connect");
closesocket(s);
*bufsize = 0;
return -1;
}
}
n = soapPostSubmit(s, path, hostname, port, soapact, soapbody);
if(n<=0) {
#ifdef DEBUG
printf("Error sending SOAP request\n");
#endif
closesocket(s);
return -1;
}
contentlen = -1;
headerlen = -1;
buf = buffer;
buffree = *bufsize;
*bufsize = 0;
while ((n = ReceiveData(s, buf, buffree, 5000)) > 0) {
buffree -= n;
buf += n;
*bufsize += n;
getContentLengthAndHeaderLength(buffer, *bufsize,
&contentlen, &headerlen);
#ifdef DEBUG
printf("received n=%dbytes bufsize=%d ContLen=%d HeadLen=%d\n",
n, *bufsize, contentlen, headerlen);
#endif
/* break if we received everything */
if(contentlen > 0 && headerlen > 0 && *bufsize >= contentlen+headerlen)
break;
}
closesocket(s);
return 0;
}
/* parseMSEARCHReply()
* the last 4 arguments are filled during the parsing :
* - location/locationsize : "location:" field of the SSDP reply packet
* - st/stsize : "st:" field of the SSDP reply packet.
* The strings are NOT null terminated */
static void
parseMSEARCHReply(const char * reply, int size,
const char * * location, int * locationsize,
const char * * st, int * stsize)
{
int a, b, i;
i = 0;
a = i; /* start of the line */
b = 0;
while(i<size)
{
switch(reply[i])
{
case ':':
if(b==0)
{
b = i; /* end of the "header" */
/*for(j=a; j<b; j++)
{
putchar(reply[j]);
}
*/
}
break;
case '\x0a':
case '\x0d':
if(b!=0)
{
/*for(j=b+1; j<i; j++)
{
putchar(reply[j]);
}
putchar('\n');*/
do { b++; } while(reply[b]==' ');
if(0==strncasecmp(reply+a, "location", 8))
{
*location = reply+b;
*locationsize = i-b;
}
else if(0==strncasecmp(reply+a, "st", 2))
{
*st = reply+b;
*stsize = i-b;
}
b = 0;
}
a = i+1;
break;
default:
break;
}
i++;
}
}
/* port upnp discover : SSDP protocol */
#define PORT 1900
#define XSTR(s) STR(s)
#define STR(s) #s
#define UPNP_MCAST_ADDR "239.255.255.250"
/* upnpDiscover() :
* return a chained list of all devices found or NULL if
* no devices was found.
* It is up to the caller to free the chained list
* delay is in millisecond (poll) */
LIBSPEC struct UPNPDev * upnpDiscover(int delay, const char * multicastif,
const char * minissdpdsock, int sameport)
{
struct UPNPDev * tmp;
struct UPNPDev * devlist = 0;
int opt = 1;
static const char MSearchMsgFmt[] =
"M-SEARCH * HTTP/1.1\r\n"
"HOST: " UPNP_MCAST_ADDR ":" XSTR(PORT) "\r\n"
"ST: %s\r\n"
"MAN: \"ssdp:discover\"\r\n"
"MX: %u\r\n"
"\r\n";
static const char * const deviceList[] = {
"urn:schemas-upnp-org:device:InternetGatewayDevice:1",
"urn:schemas-upnp-org:service:WANIPConnection:1",
"urn:schemas-upnp-org:service:WANPPPConnection:1",
"upnp:rootdevice",
0
};
int deviceIndex = 0;
char bufr[1536]; /* reception and emission buffer */
int sudp;
int n;
struct sockaddr_in sockudp_r, sockudp_w;
unsigned int mx;
#ifndef WIN32
/* first try to get infos from minissdpd ! */
if(!minissdpdsock)
minissdpdsock = "/var/run/minissdpd.sock";
while(!devlist && deviceList[deviceIndex]) {
devlist = getDevicesFromMiniSSDPD(deviceList[deviceIndex],
minissdpdsock);
/* We return what we have found if it was not only a rootdevice */
if(devlist && !strstr(deviceList[deviceIndex], "rootdevice"))
return devlist;
deviceIndex++;
}
deviceIndex = 0;
#endif
/* fallback to direct discovery */
#ifdef WIN32
sudp = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
#else
sudp = socket(PF_INET, SOCK_DGRAM, 0);
#endif
if(sudp < 0)
{
PRINT_SOCKET_ERROR("socket");
return NULL;
}
/* reception */
memset(&sockudp_r, 0, sizeof(struct sockaddr_in));
sockudp_r.sin_family = AF_INET;
if(sameport)
sockudp_r.sin_port = htons(PORT);
sockudp_r.sin_addr.s_addr = INADDR_ANY;
/* emission */
memset(&sockudp_w, 0, sizeof(struct sockaddr_in));
sockudp_w.sin_family = AF_INET;
sockudp_w.sin_port = htons(PORT);
sockudp_w.sin_addr.s_addr = inet_addr(UPNP_MCAST_ADDR);
#ifdef WIN32
if (setsockopt(sudp, SOL_SOCKET, SO_REUSEADDR, (const char *)&opt, sizeof (opt)) < 0)
#else
if (setsockopt(sudp, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof (opt)) < 0)
#endif
{
PRINT_SOCKET_ERROR("setsockopt");
return NULL;
}
if(multicastif)
{
struct in_addr mc_if;
mc_if.s_addr = inet_addr(multicastif);
sockudp_r.sin_addr.s_addr = mc_if.s_addr;
if(setsockopt(sudp, IPPROTO_IP, IP_MULTICAST_IF, (const char *)&mc_if, sizeof(mc_if)) < 0)
{
PRINT_SOCKET_ERROR("setsockopt");
}
}
/* Avant d'envoyer le paquet on bind pour recevoir la reponse */
if (bind(sudp, (struct sockaddr *)&sockudp_r, sizeof(struct sockaddr_in)) != 0)
{
PRINT_SOCKET_ERROR("bind");
closesocket(sudp);
return NULL;
}
/* Calculating maximum response time in seconds */
mx = ((unsigned int)delay) / 1000u;
/* receiving SSDP response packet */
for(n = 0;;)
{
if(n == 0)
{
/* sending the SSDP M-SEARCH packet */
n = snprintf(bufr, sizeof(bufr),
MSearchMsgFmt, deviceList[deviceIndex++], mx);
/*printf("Sending %s", bufr);*/
n = sendto(sudp, bufr, n, 0,
(struct sockaddr *)&sockudp_w, sizeof(struct sockaddr_in));
if (n < 0) {
PRINT_SOCKET_ERROR("sendto");
closesocket(sudp);
return devlist;
}
}
/* Waiting for SSDP REPLY packet to M-SEARCH */
n = ReceiveData(sudp, bufr, sizeof(bufr), delay);
if (n < 0) {
/* error */
closesocket(sudp);
return devlist;
} else if (n == 0) {
/* no data or Time Out */
if (devlist || (deviceList[deviceIndex] == 0)) {
/* no more device type to look for... */
closesocket(sudp);
return devlist;
}
} else {
const char * descURL=NULL;
int urlsize=0;
const char * st=NULL;
int stsize=0;
/*printf("%d byte(s) :\n%s\n", n, bufr);*/ /* affichage du message */
parseMSEARCHReply(bufr, n, &descURL, &urlsize, &st, &stsize);
if(st&&descURL)
{
/*printf("M-SEARCH Reply:\nST: %.*s\nLocation: %.*s\n",
stsize, st, urlsize, descURL); */
tmp = (struct UPNPDev *)malloc(sizeof(struct UPNPDev)+urlsize+stsize);
tmp->pNext = devlist;
tmp->descURL = tmp->buffer;
tmp->st = tmp->buffer + 1 + urlsize;
memcpy(tmp->buffer, descURL, urlsize);
tmp->buffer[urlsize] = '\0';
memcpy(tmp->buffer + urlsize + 1, st, stsize);
tmp->buffer[urlsize+1+stsize] = '\0';
devlist = tmp;
}
}
}
}
/* freeUPNPDevlist() should be used to
* free the chained list returned by upnpDiscover() */
LIBSPEC void freeUPNPDevlist(struct UPNPDev * devlist)
{
struct UPNPDev * next;
while(devlist)
{
next = devlist->pNext;
free(devlist);
devlist = next;
}
}
static void
url_cpy_or_cat(char * dst, const char * src, int n)
{
if( (src[0] == 'h')
&&(src[1] == 't')
&&(src[2] == 't')
&&(src[3] == 'p')
&&(src[4] == ':')
&&(src[5] == '/')
&&(src[6] == '/'))
{
strncpy(dst, src, n);
}
else
{
int l = strlen(dst);
if(src[0] != '/')
dst[l++] = '/';
if(l<=n)
strncpy(dst + l, src, n - l);
}
}
/* Prepare the Urls for usage...
*/
LIBSPEC void GetUPNPUrls(struct UPNPUrls * urls, struct IGDdatas * data,
const char * descURL)
{
char * p;
int n1, n2, n3;
n1 = strlen(data->urlbase);
if(n1==0)
n1 = strlen(descURL);
n1 += 2; /* 1 byte more for Null terminator, 1 byte for '/' if needed */
n2 = n1; n3 = n1;
n1 += strlen(data->scpdurl);
n2 += strlen(data->controlurl);
n3 += strlen(data->controlurl_CIF);
urls->ipcondescURL = (char *)malloc(n1);
urls->controlURL = (char *)malloc(n2);
urls->controlURL_CIF = (char *)malloc(n3);
/* maintenant on chope la desc du WANIPConnection */
if(data->urlbase[0] != '\0')
strncpy(urls->ipcondescURL, data->urlbase, n1);
else
strncpy(urls->ipcondescURL, descURL, n1);
p = strchr(urls->ipcondescURL+7, '/');
if(p) p[0] = '\0';
strncpy(urls->controlURL, urls->ipcondescURL, n2);
strncpy(urls->controlURL_CIF, urls->ipcondescURL, n3);
url_cpy_or_cat(urls->ipcondescURL, data->scpdurl, n1);
url_cpy_or_cat(urls->controlURL, data->controlurl, n2);
url_cpy_or_cat(urls->controlURL_CIF, data->controlurl_CIF, n3);
#ifdef DEBUG
printf("urls->ipcondescURL='%s' %d n1=%d\n", urls->ipcondescURL,
strlen(urls->ipcondescURL), n1);
printf("urls->controlURL='%s' %d n2=%d\n", urls->controlURL,
strlen(urls->controlURL), n2);
printf("urls->controlURL_CIF='%s' %d n3=%d\n", urls->controlURL_CIF,
strlen(urls->controlURL_CIF), n3);
#endif
}
LIBSPEC void
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;
}
int ReceiveData(int socket, char * data, int length, int timeout)
{
int n;
#ifndef WIN32
struct pollfd fds[1]; /* for the poll */
#ifdef MINIUPNPC_IGNORE_EINTR
do {
#endif
fds[0].fd = socket;
fds[0].events = POLLIN;
n = poll(fds, 1, timeout);
#ifdef MINIUPNPC_IGNORE_EINTR
} while(n < 0 && errno == EINTR);
#endif
if(n < 0)
{
PRINT_SOCKET_ERROR("poll");
return -1;
}
else if(n == 0)
{
return 0;
}
#else
fd_set socketSet;
TIMEVAL timeval;
FD_ZERO(&socketSet);
FD_SET(socket, &socketSet);
timeval.tv_sec = timeout / 1000;
timeval.tv_usec = (timeout % 1000) * 1000;
n = select(FD_SETSIZE, &socketSet, NULL, NULL, &timeval);
if(n < 0)
{
PRINT_SOCKET_ERROR("select");
return -1;
}
else if(n == 0)
{
return 0;
}
#endif
n = recv(socket, data, length, 0);
if(n<0)
{
PRINT_SOCKET_ERROR("recv");
}
return n;
}
static int
UPNPIGD_IsConnected(struct UPNPUrls * urls, struct IGDdatas * data)
{
char status[64];
unsigned int uptime;
status[0] = '\0';
UPNP_GetStatusInfo(urls->controlURL, data->servicetype,
status, &uptime, NULL);
if(0 == strcmp("Connected", status))
{
return 1;
}
else
return 0;
}
/* UPNP_GetValidIGD() :
* return values :
* 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 non zero return case, the urls and data structures
* passed as parameters are set. Donc forget to call FreeUPNPUrls(urls) to
* free allocated memory.
*/
LIBSPEC int
UPNP_GetValidIGD(struct UPNPDev * devlist,
struct UPNPUrls * urls,
struct IGDdatas * data,
char * lanaddr, int lanaddrlen)
{
char * descXML;
int descXMLsize = 0;
struct UPNPDev * dev;
int ndev = 0;
int state; /* state 1 : IGD connected. State 2 : IGD. State 3 : anything */
if(!devlist)
{
#ifdef DEBUG
printf("Empty devlist\n");
#endif
return 0;
}
for(state = 1; state <= 3; state++)
{
for(dev = devlist; dev; dev = dev->pNext)
{
/* we should choose an internet gateway device.
* with st == urn:schemas-upnp-org:device:InternetGatewayDevice:1 */
descXML = miniwget_getaddr(dev->descURL, &descXMLsize,
lanaddr, lanaddrlen);
if(descXML)
{
ndev++;
memset(data, 0, sizeof(struct IGDdatas));
memset(urls, 0, sizeof(struct UPNPUrls));
parserootdesc(descXML, descXMLsize, data);
free(descXML);
descXML = NULL;
if(0==strcmp(data->servicetype_CIF,
"urn:schemas-upnp-org:service:WANCommonInterfaceConfig:1")
|| state >= 3 )
{
GetUPNPUrls(urls, data, dev->descURL);
#ifdef DEBUG
printf("UPNPIGD_IsConnected(%s) = %d\n",
urls->controlURL,
UPNPIGD_IsConnected(urls, data));
#endif
if((state >= 2) || UPNPIGD_IsConnected(urls, data))
return state;
FreeUPNPUrls(urls);
}
memset(data, 0, sizeof(struct IGDdatas));
}
#ifdef DEBUG
else
{
printf("error getting XML description %s\n", dev->descURL);
}
#endif
}
}
return 0;
}
/* 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);
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);
return 1;
} else {
return 0;
}
}
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