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miniupnp/miniupnpc/minissdpc.c

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/* $Id: minissdpc.c,v 1.39 2019/04/10 12:09:17 nanard Exp $ */
/* vim: tabstop=4 shiftwidth=4 noexpandtab
* Project : miniupnp
* Web : http://miniupnp.free.fr/
* Author : Thomas BERNARD
* copyright (c) 2005-2019 Thomas Bernard
* This software is subjet to the conditions detailed in the
* provided LICENCE file. */
/*#include <syslog.h>*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#if defined (__NetBSD__)
#include <net/if.h>
#endif
#if defined(_WIN32) || defined(__amigaos__) || defined(__amigaos4__)
#ifdef _WIN32
#include <winsock2.h>
#include <ws2tcpip.h>
#include <io.h>
#include <iphlpapi.h>
#define snprintf _snprintf
#if !defined(_MSC_VER)
#include <stdint.h>
#else /* !defined(_MSC_VER) */
typedef unsigned short uint16_t;
#endif /* !defined(_MSC_VER) */
#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 */
#endif /* _WIN32 */
#if defined(__amigaos__) || defined(__amigaos4__)
#include <sys/socket.h>
#endif /* defined(__amigaos__) || defined(__amigaos4__) */
#if defined(__amigaos__)
#define uint16_t unsigned short
#endif /* defined(__amigaos__) */
/* Hack */
#define UNIX_PATH_LEN 108
struct sockaddr_un {
uint16_t sun_family;
char sun_path[UNIX_PATH_LEN];
};
#else /* defined(_WIN32) || defined(__amigaos__) || defined(__amigaos4__) */
#include <strings.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <net/if.h>
#define closesocket close
#endif
#include "miniupnpc_socketdef.h"
#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
#if !defined(HAS_IP_MREQN) && !defined(_WIN32)
#include <sys/ioctl.h>
#if defined(__sun)
#include <sys/sockio.h>
#endif
#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
#if defined(__amigaos__) || defined(__amigaos4__)
/* Amiga OS specific stuff */
#define TIMEVAL struct timeval
#endif
#include "minissdpc.h"
#include "miniupnpc.h"
#include "receivedata.h"
#if !(defined(_WIN32) || defined(__amigaos__) || defined(__amigaos4__))
#include "codelength.h"
struct UPNPDev *
getDevicesFromMiniSSDPD(const char * devtype, const char * socketpath, int * error)
{
struct UPNPDev * devlist = NULL;
int s;
int res;
s = connectToMiniSSDPD(socketpath);
if (s < 0) {
if (error)
*error = s;
return NULL;
}
res = requestDevicesFromMiniSSDPD(s, devtype);
if (res < 0) {
if (error)
*error = res;
} else {
devlist = receiveDevicesFromMiniSSDPD(s, error);
}
disconnectFromMiniSSDPD(s);
return devlist;
}
/* macros used to read from unix socket */
#define READ_BYTE_BUFFER(c) \
if((int)bufferindex >= n) { \
n = read(s, buffer, sizeof(buffer)); \
if(n<=0) break; \
bufferindex = 0; \
} \
c = buffer[bufferindex++];
#ifndef MIN
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#endif /* MIN */
#define READ_COPY_BUFFER(dst, len) \
for(l = len, p = (unsigned char *)dst; l > 0; ) { \
unsigned int lcopy; \
if((int)bufferindex >= n) { \
n = read(s, buffer, sizeof(buffer)); \
if(n<=0) break; \
bufferindex = 0; \
} \
lcopy = MIN(l, (n - bufferindex)); \
memcpy(p, buffer + bufferindex, lcopy); \
l -= lcopy; \
p += lcopy; \
bufferindex += lcopy; \
}
#define READ_DISCARD_BUFFER(len) \
for(l = len; l > 0; ) { \
unsigned int lcopy; \
if(bufferindex >= n) { \
n = read(s, buffer, sizeof(buffer)); \
if(n<=0) break; \
bufferindex = 0; \
} \
lcopy = MIN(l, (n - bufferindex)); \
l -= lcopy; \
bufferindex += lcopy; \
}
int
connectToMiniSSDPD(const char * socketpath)
{
int s;
struct sockaddr_un addr;
#if defined(MINIUPNPC_SET_SOCKET_TIMEOUT) && !defined(__sun)
struct timeval timeout;
#endif /* #ifdef MINIUPNPC_SET_SOCKET_TIMEOUT */
s = socket(AF_UNIX, SOCK_STREAM, 0);
if(s < 0)
{
/*syslog(LOG_ERR, "socket(unix): %m");*/
perror("socket(unix)");
return MINISSDPC_SOCKET_ERROR;
}
#if defined(MINIUPNPC_SET_SOCKET_TIMEOUT) && !defined(__sun)
/* setting a 3 seconds timeout */
/* not supported for AF_UNIX sockets under Solaris */
timeout.tv_sec = 3;
timeout.tv_usec = 0;
if(setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(struct timeval)) < 0)
{
perror("setsockopt SO_RCVTIMEO unix");
}
timeout.tv_sec = 3;
timeout.tv_usec = 0;
if(setsockopt(s, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(struct timeval)) < 0)
{
perror("setsockopt SO_SNDTIMEO unix");
}
#endif /* #ifdef MINIUPNPC_SET_SOCKET_TIMEOUT */
if(!socketpath)
socketpath = "/var/run/minissdpd.sock";
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
strncpy(addr.sun_path, socketpath, sizeof(addr.sun_path));
/* TODO : check if we need to handle the EINTR */
if(connect(s, (struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0)
{
/*syslog(LOG_WARNING, "connect(\"%s\"): %m", socketpath);*/
close(s);
return MINISSDPC_SOCKET_ERROR;
}
return s;
}
int
disconnectFromMiniSSDPD(int s)
{
if (close(s) < 0)
return MINISSDPC_SOCKET_ERROR;
return MINISSDPC_SUCCESS;
}
int
requestDevicesFromMiniSSDPD(int s, const char * devtype)
{
unsigned char buffer[256];
unsigned char * p;
unsigned int stsize, l;
stsize = strlen(devtype);
if(stsize == 8 && 0 == memcmp(devtype, "ssdp:all", 8))
{
buffer[0] = 3; /* request type 3 : everything */
}
else
{
buffer[0] = 1; /* request type 1 : request devices/services by type */
}
p = buffer + 1;
l = stsize; CODELENGTH(l, p);
if(p + stsize > buffer + sizeof(buffer))
{
/* devtype is too long ! */
#ifdef DEBUG
fprintf(stderr, "devtype is too long ! stsize=%u sizeof(buffer)=%u\n",
stsize, (unsigned)sizeof(buffer));
#endif /* DEBUG */
return MINISSDPC_INVALID_INPUT;
}
memcpy(p, devtype, stsize);
p += stsize;
if(write(s, buffer, p - buffer) < 0)
{
/*syslog(LOG_ERR, "write(): %m");*/
perror("minissdpc.c: write()");
return MINISSDPC_SOCKET_ERROR;
}
return MINISSDPC_SUCCESS;
}
struct UPNPDev *
receiveDevicesFromMiniSSDPD(int s, int * error)
{
struct UPNPDev * tmp;
struct UPNPDev * devlist = NULL;
unsigned char buffer[256];
ssize_t n;
unsigned char * p;
unsigned char * url;
unsigned char * st;
unsigned int bufferindex;
unsigned int i, ndev;
unsigned int urlsize, stsize, usnsize, l;
n = read(s, buffer, sizeof(buffer));
if(n<=0)
{
perror("minissdpc.c: read()");
if (error)
*error = MINISSDPC_SOCKET_ERROR;
return NULL;
}
ndev = buffer[0];
bufferindex = 1;
for(i = 0; i < ndev; i++)
{
DECODELENGTH_READ(urlsize, READ_BYTE_BUFFER);
if(n<=0) {
if (error)
*error = MINISSDPC_INVALID_SERVER_REPLY;
return devlist;
}
#ifdef DEBUG
printf(" urlsize=%u", urlsize);
#endif /* DEBUG */
url = malloc(urlsize);
if(url == NULL) {
if (error)
*error = MINISSDPC_MEMORY_ERROR;
return devlist;
}
READ_COPY_BUFFER(url, urlsize);
if(n<=0) {
if (error)
*error = MINISSDPC_INVALID_SERVER_REPLY;
goto free_url_and_return;
}
DECODELENGTH_READ(stsize, READ_BYTE_BUFFER);
if(n<=0) {
if (error)
*error = MINISSDPC_INVALID_SERVER_REPLY;
goto free_url_and_return;
}
#ifdef DEBUG
printf(" stsize=%u", stsize);
#endif /* DEBUG */
st = malloc(stsize);
if (st == NULL) {
if (error)
*error = MINISSDPC_MEMORY_ERROR;
goto free_url_and_return;
}
READ_COPY_BUFFER(st, stsize);
if(n<=0) {
if (error)
*error = MINISSDPC_INVALID_SERVER_REPLY;
goto free_url_and_st_and_return;
}
DECODELENGTH_READ(usnsize, READ_BYTE_BUFFER);
if(n<=0) {
if (error)
*error = MINISSDPC_INVALID_SERVER_REPLY;
goto free_url_and_st_and_return;
}
#ifdef DEBUG
printf(" usnsize=%u\n", usnsize);
#endif /* DEBUG */
tmp = (struct UPNPDev *)malloc(sizeof(struct UPNPDev)+urlsize+stsize+usnsize);
if(tmp == NULL) {
if (error)
*error = MINISSDPC_MEMORY_ERROR;
goto free_url_and_st_and_return;
}
tmp->pNext = devlist;
tmp->descURL = tmp->buffer;
tmp->st = tmp->buffer + 1 + urlsize;
memcpy(tmp->buffer, url, urlsize);
tmp->buffer[urlsize] = '\0';
memcpy(tmp->st, st, stsize);
tmp->buffer[urlsize+1+stsize] = '\0';
free(url);
free(st);
url = NULL;
st = NULL;
tmp->usn = tmp->buffer + 1 + urlsize + 1 + stsize;
READ_COPY_BUFFER(tmp->usn, usnsize);
if(n<=0) {
if (error)
*error = MINISSDPC_INVALID_SERVER_REPLY;
goto free_tmp_and_return;
}
tmp->buffer[urlsize+1+stsize+1+usnsize] = '\0';
tmp->scope_id = 0; /* default value. scope_id is not available with MiniSSDPd */
devlist = tmp;
}
if (error)
*error = MINISSDPC_SUCCESS;
return devlist;
free_url_and_st_and_return:
free(st);
free_url_and_return:
free(url);
return devlist;
free_tmp_and_return:
free(tmp);
return devlist;
}
#endif /* !(defined(_WIN32) || defined(__amigaos__) || defined(__amigaos4__)) */
/* 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.
* - usn/usnsize : "usn:" filed 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:", 9))
{
*location = reply+b;
*locationsize = i-b;
}
else if(0==strncasecmp(reply+a, "st:", 3))
{
*st = reply+b;
*stsize = i-b;
}
else if(0==strncasecmp(reply+a, "usn:", 4))
{
*usn = reply+b;
*usnsize = i-b;
}
b = 0;
}
a = i+1;
break;
default:
break;
}
i++;
}
}
/* port upnp discover : SSDP protocol */
#define SSDP_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 */
/* direct discovery if minissdpd responses are not sufficient */
/* ssdpDiscoverDevices() :
* 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. */
struct UPNPDev *
ssdpDiscoverDevices(const char * const deviceTypes[],
int delay, const char * multicastif,
int localport,
int ipv6, unsigned char ttl,
int * error,
int searchalltypes)
{
struct UPNPDev * tmp;
struct UPNPDev * devlist = NULL;
unsigned int scope_id = 0;
int opt = 1;
static const char MSearchMsgFmt[] =
"M-SEARCH * HTTP/1.1\r\n"
"HOST: %s:" XSTR(SSDP_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 */
SOCKET 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;
#endif
#ifdef _WIN32
unsigned long _ttl = (unsigned long)ttl;
#endif
int linklocal = 1;
int sentok;
if(error)
*error = MINISSDPC_UNKNOWN_ERROR;
if(localport==UPNP_LOCAL_PORT_SAME)
localport = SSDP_PORT;
#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(ISINVALID(sudp))
{
if(error)
*error = MINISSDPC_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(localport > 0 && localport < 65536)
p->sin6_port = htons((unsigned short)localport);
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(localport > 0 && localport < 65536)
p->sin_port = htons((unsigned short)localport);
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) {
DWORD ifbestidx;
SOCKADDR_IN destAddr;
memset(&destAddr, 0, sizeof(destAddr));
destAddr.sin_family = AF_INET;
destAddr.sin_addr.s_addr = inet_addr("223.255.255.255");
destAddr.sin_port = 0;
if (GetBestInterfaceEx((struct sockaddr *)&destAddr, &ifbestidx) == NO_ERROR) {
DWORD dwRetVal = 0;
PIP_ADAPTER_ADDRESSES pAddresses = NULL;
ULONG outBufLen = 0;
ULONG Iterations = 0;
PIP_ADAPTER_ADDRESSES pCurrAddresses = NULL;
PIP_ADAPTER_UNICAST_ADDRESS pUnicast = NULL;
outBufLen = 15360;
do {
pAddresses = (IP_ADAPTER_ADDRESSES *) HeapAlloc(GetProcessHeap(), 0, outBufLen);
if (pAddresses == NULL) {
break;
}
dwRetVal = GetAdaptersAddresses(AF_INET, GAA_FLAG_INCLUDE_PREFIX, NULL, pAddresses, &outBufLen);
if (dwRetVal == ERROR_BUFFER_OVERFLOW) {
HeapFree(GetProcessHeap(), 0, pAddresses);
pAddresses = NULL;
} else {
break;
}
Iterations++;
} while ((dwRetVal == ERROR_BUFFER_OVERFLOW) && (Iterations < 3));
if (dwRetVal == NO_ERROR) {
pCurrAddresses = pAddresses;
while (pCurrAddresses) {
#ifdef DEBUG
int i;
PIP_ADAPTER_MULTICAST_ADDRESS pMulticast = NULL;
PIP_ADAPTER_ANYCAST_ADDRESS pAnycast = NULL;
printf("\tIfIndex (IPv4 interface): %u\n", pCurrAddresses->IfIndex);
printf("\tAdapter name: %s\n", pCurrAddresses->AdapterName);
pUnicast = pCurrAddresses->FirstUnicastAddress;
if (pUnicast != NULL) {
for (i = 0; pUnicast != NULL; i++) {
printf("\tIP Address[%d]: \t%s\n", i, inet_ntoa(((PSOCKADDR_IN)pUnicast->Address.lpSockaddr)->sin_addr) );
pUnicast = pUnicast->Next;
}
printf("\tNumber of Unicast Addresses: %d\n", i);
}
pAnycast = pCurrAddresses->FirstAnycastAddress;
if (pAnycast) {
for (i = 0; pAnycast != NULL; i++) {
printf("\tAnycast Address[%d]: \t%s\n", i, inet_ntoa(((PSOCKADDR_IN)pAnycast->Address.lpSockaddr)->sin_addr) );
pAnycast = pAnycast->Next;
}
printf("\tNumber of Anycast Addresses: %d\n", i);
}
pMulticast = pCurrAddresses->FirstMulticastAddress;
if (pMulticast) {
for (i = 0; pMulticast != NULL; i++) {
printf("\tMulticast Address[%d]: \t%s\n", i, inet_ntoa(((PSOCKADDR_IN)pMulticast->Address.lpSockaddr)->sin_addr) );
pMulticast = pMulticast->Next;
}
}
printf("\n");
#endif
pUnicast = pCurrAddresses->FirstUnicastAddress;
if (pCurrAddresses->IfIndex == ifbestidx && pUnicast != NULL) {
SOCKADDR_IN *ipv4 = (SOCKADDR_IN *)(pUnicast->Address.lpSockaddr);
/* 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 = ipv4->sin_addr.s_addr;
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 = ipv4->sin_addr.s_addr;
#ifndef DEBUG
break;
#endif
}
pCurrAddresses = pCurrAddresses->Next;
}
}
if (pAddresses != NULL) {
HeapFree(GetProcessHeap(), 0, pAddresses);
pAddresses = 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 = MINISSDPC_SOCKET_ERROR;
PRINT_SOCKET_ERROR("setsockopt(SO_REUSEADDR,...)");
goto error;
}
if(ipv6) {
#ifdef _WIN32
DWORD mcastHops = ttl;
if(setsockopt(sudp, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, (const char *)&mcastHops, sizeof(mcastHops)) < 0)
#else /* _WIN32 */
int mcastHops = ttl;
if(setsockopt(sudp, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastHops, sizeof(mcastHops)) < 0)
#endif /* _WIN32 */
{
PRINT_SOCKET_ERROR("setsockopt(IPV6_MULTICAST_HOPS,...)");
}
} else {
#ifdef _WIN32
if(setsockopt(sudp, IPPROTO_IP, IP_MULTICAST_TTL, (const char *)&_ttl, sizeof(_ttl)) < 0)
#else /* _WIN32 */
if(setsockopt(sudp, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl)) < 0)
#endif /* _WIN32 */
{
/* 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 IPV6_MULTICAST_IF");
}
#else
#ifdef DEBUG
printf("Setting of multicast interface not supported in IPv6 under Windows.\n");
#endif
#endif
} else {
struct in_addr mc_if;
#if defined(_WIN32) && (_WIN32_WINNT >= _WIN32_WINNT_VISTA)
InetPtonA(AF_INET, multicastif, &mc_if);
#else
mc_if.s_addr = inet_addr(multicastif); /* ex: 192.168.x.x */
#endif
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 IP_MULTICAST_IF");
}
} 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 IP_MULTICAST_IF");
}
#elif !defined(_WIN32)
struct ifreq ifr;
int ifrlen = sizeof(ifr);
strncpy(ifr.ifr_name, multicastif, IFNAMSIZ);
ifr.ifr_name[IFNAMSIZ-1] = '\0';
if(ioctl(sudp, SIOCGIFADDR, &ifr, &ifrlen) < 0)
{
PRINT_SOCKET_ERROR("ioctl(...SIOCGIFADDR...)");
}
mc_if.s_addr = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr;
if(setsockopt(sudp, IPPROTO_IP, IP_MULTICAST_IF, (const char *)&mc_if, sizeof(mc_if)) < 0)
{
PRINT_SOCKET_ERROR("setsockopt IP_MULTICAST_IF");
}
#else /* _WIN32 */
#ifdef DEBUG
printf("Setting of multicast interface not supported with interface name.\n");
#endif
#endif /* #ifdef HAS_IP_MREQN / !defined(_WIN32) */
}
}
}
/* 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 = MINISSDPC_SOCKET_ERROR;
PRINT_SOCKET_ERROR("bind");
closesocket(sudp);
return NULL;
}
if(error)
*error = MINISSDPC_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++) {
sentok = 0;
/* 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);
if ((unsigned int)n >= sizeof(bufr)) {
if(error)
*error = MINISSDPC_MEMORY_ERROR;
goto error;
}
#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(SSDP_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(SSDP_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 = MINISSDPC_SOCKET_ERROR;
PRINT_SOCKET_ERROR("sendto");
} else {
sentok = 1;
}
#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(SSDP_PORT), &hints, &servinfo)) != 0) {
if(error)
*error = MINISSDPC_SOCKET_ERROR;
#ifdef _WIN32
fprintf(stderr, "getaddrinfo() failed: %d\n", rv);
#else
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
#endif
break;
} else {
struct addrinfo *p;
for(p = servinfo; p; p = p->ai_next) {
n = sendto(sudp, bufr, n, 0, p->ai_addr, MSC_CAST_INT p->ai_addrlen);
if (n < 0) {
#ifdef DEBUG
char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV];
if (getnameinfo(p->ai_addr, (socklen_t)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;
} else {
sentok = 1;
}
}
freeaddrinfo(servinfo);
}
if(!sentok) {
if(error)
*error = MINISSDPC_SOCKET_ERROR;
}
#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((sentok && !searchalltypes) || !deviceTypes[deviceIndex + 1]) do {
n = receivedata(sudp, bufr, sizeof(bufr), delay, &scope_id);
if (n < 0) {
/* error */
if(error)
*error = MINISSDPC_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 = MINISSDPC_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 = MINISSDPC_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;
}
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