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miniupnp/miniupnpc/miniupnpc.c

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/* $Id: miniupnpc.c,v 1.135 2015/07/23 20:40:08 nanard Exp $ */
/* Project : miniupnp
* Web : http://miniupnp.free.fr/
* Author : Thomas BERNARD
* copyright (c) 2005-2015 Thomas Bernard
* This software is subjet to the conditions detailed in the
* provided LICENSE file. */
#define __EXTENSIONS__ 1
#if !defined(__APPLE__) && !defined(__sun)
#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
#if !defined(__DragonFly__) && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__APPLE__) && !defined(_WIN32) && !defined(__CYGWIN__) && !defined(__sun) && !defined(__GNU__) && !defined(__FreeBSD_kernel__)
#define HAS_IP_MREQN
#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>
#include <iphlpapi.h>
#define snprintf _snprintf
#define strdup _strdup
#ifndef strncasecmp
#if defined(_MSC_VER) && (_MSC_VER >= 1400)
#define strncasecmp _memicmp
#else /* defined(_MSC_VER) && (_MSC_VER >= 1400) */
#define strncasecmp memicmp
#endif /* defined(_MSC_VER) && (_MSC_VER >= 1400) */
#endif /* #ifndef strncasecmp */
#define MAXHOSTNAMELEN 64
#else /* #ifdef _WIN32 */
/* Standard POSIX includes */
#include <unistd.h>
#if defined(__amigaos__) && !defined(__amigaos4__)
/* Amiga OS 3 specific stuff */
#define socklen_t int
#else
#include <sys/select.h>
#endif
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <net/if.h>
#if !defined(__amigaos__) && !defined(__amigaos4__)
#include <poll.h>
#endif
#include <strings.h>
#include <errno.h>
#define closesocket close
#endif /* #else _WIN32 */
#if defined(__amigaos__) || defined(__amigaos4__)
/* Amiga OS specific stuff */
#define TIMEVAL struct timeval
#endif
#ifdef __GNU__
#define MAXHOSTNAMELEN 64
#endif
#if defined(HAS_IP_MREQN) && defined(NEED_STRUCT_IP_MREQN)
/* Several versions of glibc don't define this structure,
* define it here and compile with CFLAGS NEED_STRUCT_IP_MREQN */
struct ip_mreqn
{
struct in_addr imr_multiaddr; /* IP multicast address of group */
struct in_addr imr_address; /* local IP address of interface */
int imr_ifindex; /* Interface index */
};
#endif
#include "miniupnpc.h"
#include "minissdpc.h"
#include "miniwget.h"
#include "minisoap.h"
#include "minixml.h"
#include "upnpcommands.h"
#include "connecthostport.h"
#include "receivedata.h"
/* compare the begining of a string with a constant string */
#define COMPARE(str, cstr) (0==memcmp(str, cstr, sizeof(cstr) - 1))
#ifdef _WIN32
#define PRINT_SOCKET_ERROR(x) printf("Socket error: %s, %d\n", x, WSAGetLastError());
#else
#define PRINT_SOCKET_ERROR(x) perror(x)
#endif
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 64
#endif
#define SOAPPREFIX "s"
#define SERVICEPREFIX "u"
#define SERVICEPREFIX2 'u'
/* root description parsing */
MINIUPNP_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
}
/* simpleUPnPcommand2 :
* not so simple !
* return values :
* pointer - OK
* NULL - error */
char * simpleUPnPcommand2(int s, const char * url, const char * service,
const char * action, struct UPNParg * args,
int * bufsize, const char * httpversion)
{
char hostname[MAXHOSTNAMELEN+1];
unsigned short port = 0;
char * path;
char soapact[128];
char soapbody[2048];
char * buf;
int n;
*bufsize = 0;
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 */
return NULL;
}
*(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, NULL)) return NULL;
if(s < 0) {
s = connecthostport(hostname, port, 0);
if(s < 0) {
/* failed to connect */
return NULL;
}
}
n = soapPostSubmit(s, path, hostname, port, soapact, soapbody, httpversion);
if(n<=0) {
#ifdef DEBUG
printf("Error sending SOAP request\n");
#endif
closesocket(s);
return NULL;
}
buf = getHTTPResponse(s, bufsize);
#ifdef DEBUG
if(*bufsize > 0 && buf)
{
printf("SOAP Response :\n%.*s\n", *bufsize, buf);
}
#endif
closesocket(s);
return buf;
}
/* simpleUPnPcommand :
* not so simple !
* return values :
* pointer - OK
* NULL - error */
char * simpleUPnPcommand(int s, const char * url, const char * service,
const char * action, struct UPNParg * args,
int * bufsize)
{
char * buf;
#if 1
buf = simpleUPnPcommand2(s, url, service, action, args, bufsize, "1.1");
#else
buf = simpleUPnPcommand2(s, url, service, action, args, bufsize, "1.0");
if (!buf || *bufsize == 0)
{
#if DEBUG
printf("Error or no result from SOAP request; retrying with HTTP/1.1\n");
#endif
buf = simpleUPnPcommand2(s, url, service, action, args, bufsize, "1.1");
}
#endif
return buf;
}
/* 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,
const char * * usn, int * usnsize)
{
int a, b, i;
i = 0;
a = i; /* start of the line */
b = 0; /* end of the "header" (position of the colon) */
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');*/
/* skip the colon and white spaces */
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;
}
else if(0==strncasecmp(reply+a, "usn", 3))
{
*usn = reply+b;
*usnsize = 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"
/* for IPv6 */
#define UPNP_MCAST_LL_ADDR "FF02::C" /* link-local */
#define UPNP_MCAST_SL_ADDR "FF05::C" /* site-local */
/* upnpDiscoverDevices() :
* 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).
* UDA v1.1 says :
* The TTL for the IP packet SHOULD default to 2 and
* SHOULD be configurable. */
MINIUPNP_LIBSPEC struct UPNPDev *
upnpDiscoverDevices(const char * const deviceTypes[],
int delay, const char * multicastif,
const char * minissdpdsock, int sameport,
int ipv6, unsigned char ttl,
int * error,
int searchalltypes)
{
struct UPNPDev * tmp;
struct UPNPDev * devlist = 0;
unsigned int scope_id = 0;
int opt = 1;
static const char MSearchMsgFmt[] =
"M-SEARCH * HTTP/1.1\r\n"
"HOST: %s:" XSTR(PORT) "\r\n"
"ST: %s\r\n"
"MAN: \"ssdp:discover\"\r\n"
"MX: %u\r\n"
"\r\n";
int deviceIndex;
char bufr[1536]; /* reception and emission buffer */
int sudp;
int n;
struct sockaddr_storage sockudp_r;
unsigned int mx;
#ifdef NO_GETADDRINFO
struct sockaddr_storage sockudp_w;
#else
int rv;
struct addrinfo hints, *servinfo, *p;
#endif
#ifdef _WIN32
MIB_IPFORWARDROW ip_forward;
#endif
int linklocal = 1;
if(error)
*error = UPNPDISCOVER_UNKNOWN_ERROR;
#if !defined(_WIN32) && !defined(__amigaos__) && !defined(__amigaos4__)
/* first try to get infos from minissdpd ! */
if(!minissdpdsock)
minissdpdsock = "/var/run/minissdpd.sock";
for(deviceIndex = 0; deviceTypes[deviceIndex]; deviceIndex++) {
struct UPNPDev * minissdpd_devlist;
int only_rootdevice = 1;
minissdpd_devlist = getDevicesFromMiniSSDPD(deviceTypes[deviceIndex],
minissdpdsock, 0);
if(minissdpd_devlist) {
#ifdef DEBUG
printf("returned by MiniSSDPD: %s\t%s\n",
minissdpd_devlist->st, minissdpd_devlist->descURL);
#endif /* DEBUG */
if(!strstr(minissdpd_devlist->st, "rootdevice"))
only_rootdevice = 0;
for(tmp = minissdpd_devlist; tmp->pNext != NULL; tmp = tmp->pNext) {
#ifdef DEBUG
printf("returned by MiniSSDPD: %s\t%s\n",
tmp->pNext->st, tmp->pNext->descURL);
#endif /* DEBUG */
if(!strstr(tmp->st, "rootdevice"))
only_rootdevice = 0;
}
tmp->pNext = devlist;
devlist = minissdpd_devlist;
if(!searchalltypes && !only_rootdevice)
break;
}
}
for(tmp = devlist; tmp != NULL; tmp = tmp->pNext) {
/* We return what we have found if it was not only a rootdevice */
if(!strstr(tmp->st, "rootdevice")) {
if(error)
*error = UPNPDISCOVER_SUCCESS;
return devlist;
}
}
#endif /* !defined(_WIN32) && !defined(__amigaos__) && !defined(__amigaos4__) */
/* direct discovery if minissdpd responses are not sufficient */
#ifdef _WIN32
sudp = socket(ipv6 ? PF_INET6 : PF_INET, SOCK_DGRAM, IPPROTO_UDP);
#else
sudp = socket(ipv6 ? PF_INET6 : PF_INET, SOCK_DGRAM, 0);
#endif
if(sudp < 0)
{
if(error)
*error = UPNPDISCOVER_SOCKET_ERROR;
PRINT_SOCKET_ERROR("socket");
return NULL;
}
/* reception */
memset(&sockudp_r, 0, sizeof(struct sockaddr_storage));
if(ipv6) {
struct sockaddr_in6 * p = (struct sockaddr_in6 *)&sockudp_r;
p->sin6_family = AF_INET6;
if(sameport)
p->sin6_port = htons(PORT);
p->sin6_addr = in6addr_any; /* in6addr_any is not available with MinGW32 3.4.2 */
} else {
struct sockaddr_in * p = (struct sockaddr_in *)&sockudp_r;
p->sin_family = AF_INET;
if(sameport)
p->sin_port = htons(PORT);
p->sin_addr.s_addr = INADDR_ANY;
}
#ifdef _WIN32
/* This code could help us to use the right Network interface for
* SSDP multicast traffic */
/* Get IP associated with the index given in the ip_forward struct
* in order to give this ip to setsockopt(sudp, IPPROTO_IP, IP_MULTICAST_IF) */
if(!ipv6
&& (GetBestRoute(inet_addr("223.255.255.255"), 0, &ip_forward) == NO_ERROR)) {
DWORD dwRetVal = 0;
PMIB_IPADDRTABLE pIPAddrTable;
DWORD dwSize = 0;
#ifdef DEBUG
IN_ADDR IPAddr;
#endif
int i;
#ifdef DEBUG
printf("ifIndex=%lu nextHop=%lx \n", ip_forward.dwForwardIfIndex, ip_forward.dwForwardNextHop);
#endif
pIPAddrTable = (MIB_IPADDRTABLE *) malloc(sizeof (MIB_IPADDRTABLE));
if(pIPAddrTable) {
if (GetIpAddrTable(pIPAddrTable, &dwSize, 0) == ERROR_INSUFFICIENT_BUFFER) {
free(pIPAddrTable);
pIPAddrTable = (MIB_IPADDRTABLE *) malloc(dwSize);
}
}
if(pIPAddrTable) {
dwRetVal = GetIpAddrTable( pIPAddrTable, &dwSize, 0 );
#ifdef DEBUG
printf("\tNum Entries: %ld\n", pIPAddrTable->dwNumEntries);
#endif
for (i=0; i < (int) pIPAddrTable->dwNumEntries; i++) {
#ifdef DEBUG
printf("\n\tInterface Index[%d]:\t%ld\n", i, pIPAddrTable->table[i].dwIndex);
IPAddr.S_un.S_addr = (u_long) pIPAddrTable->table[i].dwAddr;
printf("\tIP Address[%d]: \t%s\n", i, inet_ntoa(IPAddr) );
IPAddr.S_un.S_addr = (u_long) pIPAddrTable->table[i].dwMask;
printf("\tSubnet Mask[%d]: \t%s\n", i, inet_ntoa(IPAddr) );
IPAddr.S_un.S_addr = (u_long) pIPAddrTable->table[i].dwBCastAddr;
printf("\tBroadCast[%d]: \t%s (%ld)\n", i, inet_ntoa(IPAddr), pIPAddrTable->table[i].dwBCastAddr);
printf("\tReassembly size[%d]:\t%ld\n", i, pIPAddrTable->table[i].dwReasmSize);
printf("\tType and State[%d]:", i);
printf("\n");
#endif
if (pIPAddrTable->table[i].dwIndex == ip_forward.dwForwardIfIndex) {
/* Set the address of this interface to be used */
struct in_addr mc_if;
memset(&mc_if, 0, sizeof(mc_if));
mc_if.s_addr = pIPAddrTable->table[i].dwAddr;
if(setsockopt(sudp, IPPROTO_IP, IP_MULTICAST_IF, (const char *)&mc_if, sizeof(mc_if)) < 0) {
PRINT_SOCKET_ERROR("setsockopt");
}
((struct sockaddr_in *)&sockudp_r)->sin_addr.s_addr = pIPAddrTable->table[i].dwAddr;
#ifndef DEBUG
break;
#endif
}
}
free(pIPAddrTable);
pIPAddrTable = NULL;
}
}
#endif /* _WIN32 */
#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
{
if(error)
*error = UPNPDISCOVER_SOCKET_ERROR;
PRINT_SOCKET_ERROR("setsockopt(SO_REUSEADDR,...)");
return NULL;
}
if(setsockopt(sudp, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl)) < 0)
{
/* not a fatal error */
PRINT_SOCKET_ERROR("setsockopt(IP_MULTICAST_TTL,...)");
}
if(multicastif)
{
if(ipv6) {
#if !defined(_WIN32)
/* according to MSDN, if_nametoindex() is supported since
* MS Windows Vista and MS Windows Server 2008.
* http://msdn.microsoft.com/en-us/library/bb408409%28v=vs.85%29.aspx */
unsigned int ifindex = if_nametoindex(multicastif); /* eth0, etc. */
if(setsockopt(sudp, IPPROTO_IPV6, IPV6_MULTICAST_IF, &ifindex, sizeof(ifindex)) < 0)
{
PRINT_SOCKET_ERROR("setsockopt");
}
#else
#ifdef DEBUG
printf("Setting of multicast interface not supported in IPv6 under Windows.\n");
#endif
#endif
} else {
struct in_addr mc_if;
mc_if.s_addr = inet_addr(multicastif); /* ex: 192.168.x.x */
if(mc_if.s_addr != INADDR_NONE)
{
((struct sockaddr_in *)&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");
}
} else {
#ifdef HAS_IP_MREQN
/* was not an ip address, try with an interface name */
struct ip_mreqn reqn; /* only defined with -D_BSD_SOURCE or -D_GNU_SOURCE */
memset(&reqn, 0, sizeof(struct ip_mreqn));
reqn.imr_ifindex = if_nametoindex(multicastif);
if(setsockopt(sudp, IPPROTO_IP, IP_MULTICAST_IF, (const char *)&reqn, sizeof(reqn)) < 0)
{
PRINT_SOCKET_ERROR("setsockopt");
}
#else
#ifdef DEBUG
printf("Setting of multicast interface not supported with interface name.\n");
#endif
#endif
}
}
}
/* Before sending the packed, we first "bind" in order to be able
* to receive the response */
if (bind(sudp, (const struct sockaddr *)&sockudp_r,
ipv6 ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in)) != 0)
{
if(error)
*error = UPNPDISCOVER_SOCKET_ERROR;
PRINT_SOCKET_ERROR("bind");
closesocket(sudp);
return NULL;
}
if(error)
*error = UPNPDISCOVER_SUCCESS;
/* Calculating maximum response time in seconds */
mx = ((unsigned int)delay) / 1000u;
if(mx == 0) {
mx = 1;
delay = 1000;
}
/* receiving SSDP response packet */
for(deviceIndex = 0; deviceTypes[deviceIndex]; deviceIndex++) {
/* sending the SSDP M-SEARCH packet */
n = snprintf(bufr, sizeof(bufr),
MSearchMsgFmt,
ipv6 ?
(linklocal ? "[" UPNP_MCAST_LL_ADDR "]" : "[" UPNP_MCAST_SL_ADDR "]")
: UPNP_MCAST_ADDR,
deviceTypes[deviceIndex], mx);
#ifdef DEBUG
/*printf("Sending %s", bufr);*/
printf("Sending M-SEARCH request to %s with ST: %s\n",
ipv6 ?
(linklocal ? "[" UPNP_MCAST_LL_ADDR "]" : "[" UPNP_MCAST_SL_ADDR "]")
: UPNP_MCAST_ADDR,
deviceTypes[deviceIndex]);
#endif
#ifdef NO_GETADDRINFO
/* the following code is not using getaddrinfo */
/* emission */
memset(&sockudp_w, 0, sizeof(struct sockaddr_storage));
if(ipv6) {
struct sockaddr_in6 * p = (struct sockaddr_in6 *)&sockudp_w;
p->sin6_family = AF_INET6;
p->sin6_port = htons(PORT);
inet_pton(AF_INET6,
linklocal ? UPNP_MCAST_LL_ADDR : UPNP_MCAST_SL_ADDR,
&(p->sin6_addr));
} else {
struct sockaddr_in * p = (struct sockaddr_in *)&sockudp_w;
p->sin_family = AF_INET;
p->sin_port = htons(PORT);
p->sin_addr.s_addr = inet_addr(UPNP_MCAST_ADDR);
}
n = sendto(sudp, bufr, n, 0, &sockudp_w,
ipv6 ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in));
if (n < 0) {
if(error)
*error = UPNPDISCOVER_SOCKET_ERROR;
PRINT_SOCKET_ERROR("sendto");
break;
}
#else /* #ifdef NO_GETADDRINFO */
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC; /* AF_INET6 or AF_INET */
hints.ai_socktype = SOCK_DGRAM;
/*hints.ai_flags = */
if ((rv = getaddrinfo(ipv6
? (linklocal ? UPNP_MCAST_LL_ADDR : UPNP_MCAST_SL_ADDR)
: UPNP_MCAST_ADDR,
XSTR(PORT), &hints, &servinfo)) != 0) {
if(error)
*error = UPNPDISCOVER_SOCKET_ERROR;
#ifdef _WIN32
fprintf(stderr, "getaddrinfo() failed: %d\n", rv);
#else
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
#endif
break;
}
for(p = servinfo; p; p = p->ai_next) {
n = sendto(sudp, bufr, n, 0, p->ai_addr, p->ai_addrlen);
if (n < 0) {
#ifdef DEBUG
char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV];
if (getnameinfo(p->ai_addr, p->ai_addrlen, hbuf, sizeof(hbuf), sbuf,
sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV) == 0) {
fprintf(stderr, "host:%s port:%s\n", hbuf, sbuf);
}
#endif
PRINT_SOCKET_ERROR("sendto");
continue;
}
}
freeaddrinfo(servinfo);
if(n < 0) {
if(error)
*error = UPNPDISCOVER_SOCKET_ERROR;
break;
}
#endif /* #ifdef NO_GETADDRINFO */
/* Waiting for SSDP REPLY packet to M-SEARCH
* if searchalltypes is set, enter the loop only
* when the last deviceType is reached */
if(!searchalltypes || !deviceTypes[deviceIndex + 1]) do {
n = receivedata(sudp, bufr, sizeof(bufr), delay, &scope_id);
if (n < 0) {
/* error */
if(error)
*error = UPNPDISCOVER_SOCKET_ERROR;
goto error;
} else if (n == 0) {
/* no data or Time Out */
#ifdef DEBUG
printf("NODATA or TIMEOUT\n");
#endif /* DEBUG */
if (devlist && !searchalltypes) {
/* found some devices, stop now*/
if(error)
*error = UPNPDISCOVER_SUCCESS;
goto error;
}
} else {
const char * descURL=NULL;
int urlsize=0;
const char * st=NULL;
int stsize=0;
const char * usn=NULL;
int usnsize=0;
parseMSEARCHReply(bufr, n, &descURL, &urlsize, &st, &stsize, &usn, &usnsize);
if(st&&descURL) {
#ifdef DEBUG
printf("M-SEARCH Reply:\n ST: %.*s\n USN: %.*s\n Location: %.*s\n",
stsize, st, usnsize, (usn?usn:""), urlsize, descURL);
#endif /* DEBUG */
for(tmp=devlist; tmp; tmp = tmp->pNext) {
if(memcmp(tmp->descURL, descURL, urlsize) == 0 &&
tmp->descURL[urlsize] == '\0' &&
memcmp(tmp->st, st, stsize) == 0 &&
tmp->st[stsize] == '\0' &&
(usnsize == 0 || memcmp(tmp->usn, usn, usnsize) == 0) &&
tmp->usn[usnsize] == '\0')
break;
}
/* at the exit of the loop above, tmp is null if
* no duplicate device was found */
if(tmp)
continue;
tmp = (struct UPNPDev *)malloc(sizeof(struct UPNPDev)+urlsize+stsize+usnsize);
if(!tmp) {
/* memory allocation error */
if(error)
*error = UPNPDISCOVER_MEMORY_ERROR;
goto error;
}
tmp->pNext = devlist;
tmp->descURL = tmp->buffer;
tmp->st = tmp->buffer + 1 + urlsize;
tmp->usn = tmp->st + 1 + stsize;
memcpy(tmp->buffer, descURL, urlsize);
tmp->buffer[urlsize] = '\0';
memcpy(tmp->st, st, stsize);
tmp->buffer[urlsize+1+stsize] = '\0';
if(usn != NULL)
memcpy(tmp->usn, usn, usnsize);
tmp->buffer[urlsize+1+stsize+1+usnsize] = '\0';
tmp->scope_id = scope_id;
devlist = tmp;
}
}
} while(n > 0);
if(ipv6) {
/* switch linklocal flag */
if(linklocal) {
linklocal = 0;
--deviceIndex;
} else {
linklocal = 1;
}
}
}
error:
closesocket(sudp);
return devlist;
}
/* upnpDiscover() Discover IGD device */
MINIUPNP_LIBSPEC struct UPNPDev *
upnpDiscover(int delay, const char * multicastif,
const char * minissdpdsock, int sameport,
int ipv6, unsigned char ttl,
int * error)
{
static const char * const deviceList[] = {
#if 0
"urn:schemas-upnp-org:device:InternetGatewayDevice:2",
"urn:schemas-upnp-org:service:WANIPConnection:2",
#endif
"urn:schemas-upnp-org:device:InternetGatewayDevice:1",
"urn:schemas-upnp-org:service:WANIPConnection:1",
"urn:schemas-upnp-org:service:WANPPPConnection:1",
"upnp:rootdevice",
/*"ssdp:all",*/
0
};
return upnpDiscoverDevices(deviceList,
delay, multicastif, minissdpdsock, sameport,
ipv6, ttl, error, 0);
}
/* upnpDiscoverAll() Discover all UPnP devices */
MINIUPNP_LIBSPEC struct UPNPDev *
upnpDiscoverAll(int delay, const char * multicastif,
const char * minissdpdsock, int sameport,
int ipv6, unsigned char ttl,
int * error)
{
static const char * const deviceList[] = {
/*"upnp:rootdevice",*/
"ssdp:all",
0
};
return upnpDiscoverDevices(deviceList,
delay, multicastif, minissdpdsock, sameport,
ipv6, ttl, error, 0);
}
/* upnpDiscoverDevice() Discover a specific device */
MINIUPNP_LIBSPEC struct UPNPDev *
upnpDiscoverDevice(const char * device, int delay, const char * multicastif,
const char * minissdpdsock, int sameport,
int ipv6, unsigned char ttl,
int * error)
{
const char * const deviceList[] = {
device,
0
};
return upnpDiscoverDevices(deviceList,
delay, multicastif, minissdpdsock, sameport,
ipv6, ttl, error, 0);
}
/* freeUPNPDevlist() should be used to
* free the chained list returned by upnpDiscover() */
MINIUPNP_LIBSPEC void freeUPNPDevlist(struct UPNPDev * devlist)
{
struct UPNPDev * next;
while(devlist)
{
next = devlist->pNext;
free(devlist);
devlist = next;
}
}
static char *
build_absolute_url(const char * baseurl, const char * descURL,
const char * url, unsigned int scope_id)
{
int l, n;
char * s;
const char * base;
char * p;
#if defined(IF_NAMESIZE) && !defined(_WIN32)
char ifname[IF_NAMESIZE];
#else /* defined(IF_NAMESIZE) && !defined(_WIN32) */
char scope_str[8];
#endif /* defined(IF_NAMESIZE) && !defined(_WIN32) */
if( (url[0] == 'h')
&&(url[1] == 't')
&&(url[2] == 't')
&&(url[3] == 'p')
&&(url[4] == ':')
&&(url[5] == '/')
&&(url[6] == '/'))
return strdup(url);
base = (baseurl[0] == '\0') ? descURL : baseurl;
n = strlen(base);
if(n > 7) {
p = strchr(base + 7, '/');
if(p)
n = p - base;
}
l = n + strlen(url) + 1;
if(url[0] != '/')
l++;
if(scope_id != 0) {
#if defined(IF_NAMESIZE) && !defined(_WIN32)
if(if_indextoname(scope_id, ifname)) {
l += 3 + strlen(ifname); /* 3 == strlen(%25) */
}
#else /* defined(IF_NAMESIZE) && !defined(_WIN32) */
/* under windows, scope is numerical */
l += 3 + snprintf(scope_str, sizeof(scope_str), "%u", scope_id);
#endif /* defined(IF_NAMESIZE) && !defined(_WIN32) */
}
s = malloc(l);
if(s == NULL) return NULL;
memcpy(s, base, n);
if(scope_id != 0) {
s[n] = '\0';
if(0 == memcmp(s, "http://[fe80:", 13)) {
/* this is a linklocal IPv6 address */
p = strchr(s, ']');
if(p) {
/* insert %25<scope> into URL */
#if defined(IF_NAMESIZE) && !defined(_WIN32)
memmove(p + 3 + strlen(ifname), p, strlen(p) + 1);
memcpy(p, "%25", 3);
memcpy(p + 3, ifname, strlen(ifname));
n += 3 + strlen(ifname);
#else /* defined(IF_NAMESIZE) && !defined(_WIN32) */
memmove(p + 3 + strlen(scope_str), p, strlen(p) + 1);
memcpy(p, "%25", 3);
memcpy(p + 3, scope_str, strlen(scope_str));
n += 3 + strlen(scope_str);
#endif /* defined(IF_NAMESIZE) && !defined(_WIN32) */
}
}
}
if(url[0] != '/')
s[n++] = '/';
memcpy(s + n, url, l - n);
return s;
}
/* Prepare the Urls for usage...
*/
MINIUPNP_LIBSPEC void
GetUPNPUrls(struct UPNPUrls * urls, struct IGDdatas * data,
const char * descURL, unsigned int scope_id)
{
/* strdup descURL */
urls->rootdescURL = strdup(descURL);
/* get description of WANIPConnection */
urls->ipcondescURL = build_absolute_url(data->urlbase, descURL,
data->first.scpdurl, scope_id);
urls->controlURL = build_absolute_url(data->urlbase, descURL,
data->first.controlurl, scope_id);
urls->controlURL_CIF = build_absolute_url(data->urlbase, descURL,
data->CIF.controlurl, scope_id);
urls->controlURL_6FC = build_absolute_url(data->urlbase, descURL,
data->IPv6FC.controlurl, scope_id);
#ifdef DEBUG
printf("urls->ipcondescURL='%s'\n", urls->ipcondescURL);
printf("urls->controlURL='%s'\n", urls->controlURL);
printf("urls->controlURL_CIF='%s'\n", urls->controlURL_CIF);
printf("urls->controlURL_6FC='%s'\n", urls->controlURL_6FC);
#endif
}
MINIUPNP_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;
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];
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),
lanaddr, lanaddrlen,
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++;
}
}
}
/* 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;
}
}
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