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850 lines
23 KiB
C
850 lines
23 KiB
C
/* $Id: minissdpc.c,v 1.28 2015/09/18 13:05:39 nanard Exp $ */
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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 LICENCE file. */
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/*#include <syslog.h>*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#if defined(_WIN32) || defined(__amigaos__) || defined(__amigaos4__)
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#ifdef _WIN32
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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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#include <winsock.h>
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#define snprintf _snprintf
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#if !defined(_MSC_VER)
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#include <stdint.h>
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#else /* !defined(_MSC_VER) */
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typedef unsigned short uint16_t;
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#endif /* !defined(_MSC_VER) */
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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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#endif /* _WIN32 */
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#if defined(__amigaos__) || defined(__amigaos4__)
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#include <sys/socket.h>
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#endif /* defined(__amigaos__) || defined(__amigaos4__) */
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#if defined(__amigaos__)
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#define uint16_t unsigned short
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#endif /* defined(__amigaos__) */
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/* Hack */
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#define UNIX_PATH_LEN 108
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struct sockaddr_un {
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uint16_t sun_family;
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char sun_path[UNIX_PATH_LEN];
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};
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#else /* defined(_WIN32) || defined(__amigaos__) || defined(__amigaos4__) */
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#include <strings.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/un.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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#define closesocket close
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#endif
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#ifdef _WIN32
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#define PRINT_SOCKET_ERROR(x) printf("Socket error: %s, %d\n", x, WSAGetLastError());
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#else
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#define PRINT_SOCKET_ERROR(x) perror(x)
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#endif
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#if !defined(__DragonFly__) && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__APPLE__) && !defined(_WIN32) && !defined(__CYGWIN__) && !defined(__sun) && !defined(__GNU__) && !defined(__FreeBSD_kernel__)
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#define HAS_IP_MREQN
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#endif
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#if defined(HAS_IP_MREQN) && defined(NEED_STRUCT_IP_MREQN)
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/* Several versions of glibc don't define this structure,
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* define it here and compile with CFLAGS NEED_STRUCT_IP_MREQN */
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struct ip_mreqn
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{
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struct in_addr imr_multiaddr; /* IP multicast address of group */
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struct in_addr imr_address; /* local IP address of interface */
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int imr_ifindex; /* Interface index */
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};
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#endif
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#if defined(__amigaos__) || defined(__amigaos4__)
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/* Amiga OS specific stuff */
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#define TIMEVAL struct timeval
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#endif
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#include "minissdpc.h"
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#include "miniupnpc.h"
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#include "receivedata.h"
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#if !(defined(_WIN32) || defined(__amigaos__) || defined(__amigaos4__))
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#include "codelength.h"
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struct UPNPDev *
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getDevicesFromMiniSSDPD(const char * devtype, const char * socketpath, int * error)
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{
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struct UPNPDev * devlist = NULL;
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int s;
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int res;
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s = connectToMiniSSDPD(socketpath);
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if (s < 0) {
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if (error)
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*error = s;
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return NULL;
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}
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res = requestDevicesFromMiniSSDPD(s, devtype);
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if (res < 0) {
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if (error)
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*error = res;
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} else {
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devlist = receiveDevicesFromMiniSSDPD(s, error);
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}
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disconnectFromMiniSSDPD(s);
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return devlist;
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}
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/* macros used to read from unix socket */
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#define READ_BYTE_BUFFER(c) \
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if((int)bufferindex >= n) { \
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n = read(s, buffer, sizeof(buffer)); \
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if(n<=0) break; \
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bufferindex = 0; \
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} \
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c = buffer[bufferindex++];
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#ifndef MIN
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#define MIN(a, b) (((a) < (b)) ? (a) : (b))
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#endif /* MIN */
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#define READ_COPY_BUFFER(dst, len) \
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for(l = len, p = (unsigned char *)dst; l > 0; ) { \
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unsigned int lcopy; \
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if((int)bufferindex >= n) { \
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n = read(s, buffer, sizeof(buffer)); \
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if(n<=0) break; \
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bufferindex = 0; \
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} \
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lcopy = MIN(l, (n - bufferindex)); \
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memcpy(p, buffer + bufferindex, lcopy); \
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l -= lcopy; \
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p += lcopy; \
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bufferindex += lcopy; \
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}
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#define READ_DISCARD_BUFFER(len) \
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for(l = len; l > 0; ) { \
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unsigned int lcopy; \
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if(bufferindex >= n) { \
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n = read(s, buffer, sizeof(buffer)); \
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if(n<=0) break; \
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bufferindex = 0; \
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} \
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lcopy = MIN(l, (n - bufferindex)); \
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l -= lcopy; \
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bufferindex += lcopy; \
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}
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int
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connectToMiniSSDPD(const char * socketpath)
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{
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int s;
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struct sockaddr_un addr;
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#ifdef MINIUPNPC_SET_SOCKET_TIMEOUT
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struct timeval timeout;
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#endif /* #ifdef MINIUPNPC_SET_SOCKET_TIMEOUT */
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s = socket(AF_UNIX, SOCK_STREAM, 0);
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if(s < 0)
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{
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/*syslog(LOG_ERR, "socket(unix): %m");*/
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perror("socket(unix)");
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return MINISSDPC_SOCKET_ERROR;
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}
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#ifdef MINIUPNPC_SET_SOCKET_TIMEOUT
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/* setting a 3 seconds timeout */
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timeout.tv_sec = 3;
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timeout.tv_usec = 0;
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if(setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(struct timeval)) < 0)
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{
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perror("setsockopt");
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}
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timeout.tv_sec = 3;
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timeout.tv_usec = 0;
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if(setsockopt(s, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(struct timeval)) < 0)
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{
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perror("setsockopt");
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}
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#endif /* #ifdef MINIUPNPC_SET_SOCKET_TIMEOUT */
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if(!socketpath)
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socketpath = "/var/run/minissdpd.sock";
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addr.sun_family = AF_UNIX;
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strncpy(addr.sun_path, socketpath, sizeof(addr.sun_path));
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/* TODO : check if we need to handle the EINTR */
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if(connect(s, (struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0)
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{
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/*syslog(LOG_WARNING, "connect(\"%s\"): %m", socketpath);*/
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close(s);
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return MINISSDPC_SOCKET_ERROR;
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}
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return s;
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}
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int
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disconnectFromMiniSSDPD(int s)
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{
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if (close(s) < 0)
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return MINISSDPC_SOCKET_ERROR;
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return MINISSDPC_SUCCESS;
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}
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int
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requestDevicesFromMiniSSDPD(int s, const char * devtype)
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{
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unsigned char buffer[256];
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unsigned char * p;
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unsigned int stsize, l;
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stsize = strlen(devtype);
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if(stsize == 8 && 0 == memcmp(devtype, "ssdp:all", 8))
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{
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buffer[0] = 3; /* request type 3 : everything */
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}
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else
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{
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buffer[0] = 1; /* request type 1 : request devices/services by type */
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}
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p = buffer + 1;
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l = stsize; CODELENGTH(l, p);
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if(p + stsize > buffer + sizeof(buffer))
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{
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/* devtype is too long ! */
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#ifdef DEBUG
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fprintf(stderr, "devtype is too long ! stsize=%u sizeof(buffer)=%u\n",
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stsize, (unsigned)sizeof(buffer));
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#endif /* DEBUG */
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return MINISSDPC_INVALID_INPUT;
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}
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memcpy(p, devtype, stsize);
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p += stsize;
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if(write(s, buffer, p - buffer) < 0)
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{
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/*syslog(LOG_ERR, "write(): %m");*/
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perror("minissdpc.c: write()");
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return MINISSDPC_SOCKET_ERROR;
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}
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return MINISSDPC_SUCCESS;
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}
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struct UPNPDev *
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receiveDevicesFromMiniSSDPD(int s, int * error)
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{
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struct UPNPDev * tmp;
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struct UPNPDev * devlist = NULL;
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unsigned char buffer[256];
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ssize_t n;
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unsigned char * p;
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unsigned char * url;
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unsigned char * st;
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unsigned int bufferindex;
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unsigned int i, ndev;
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unsigned int urlsize, stsize, usnsize, l;
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n = read(s, buffer, sizeof(buffer));
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if(n<=0)
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{
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perror("minissdpc.c: read()");
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if (error)
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*error = MINISSDPC_SOCKET_ERROR;
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return NULL;
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}
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ndev = buffer[0];
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bufferindex = 1;
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for(i = 0; i < ndev; i++)
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{
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DECODELENGTH_READ(urlsize, READ_BYTE_BUFFER);
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if(n<=0) {
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if (error)
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*error = MINISSDPC_INVALID_SERVER_REPLY;
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return devlist;
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}
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#ifdef DEBUG
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printf(" urlsize=%u", urlsize);
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#endif /* DEBUG */
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url = malloc(urlsize);
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if(url == NULL) {
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if (error)
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*error = MINISSDPC_MEMORY_ERROR;
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return devlist;
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}
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READ_COPY_BUFFER(url, urlsize);
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if(n<=0) {
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if (error)
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*error = MINISSDPC_INVALID_SERVER_REPLY;
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goto free_url_and_return;
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}
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DECODELENGTH_READ(stsize, READ_BYTE_BUFFER);
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if(n<=0) {
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if (error)
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*error = MINISSDPC_INVALID_SERVER_REPLY;
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goto free_url_and_return;
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}
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#ifdef DEBUG
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printf(" stsize=%u", stsize);
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#endif /* DEBUG */
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st = malloc(stsize);
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if (st == NULL) {
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if (error)
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*error = MINISSDPC_MEMORY_ERROR;
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goto free_url_and_return;
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}
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READ_COPY_BUFFER(st, stsize);
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if(n<=0) {
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if (error)
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*error = MINISSDPC_INVALID_SERVER_REPLY;
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goto free_url_and_st_and_return;
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}
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DECODELENGTH_READ(usnsize, READ_BYTE_BUFFER);
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if(n<=0) {
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if (error)
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*error = MINISSDPC_INVALID_SERVER_REPLY;
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goto free_url_and_st_and_return;
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}
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#ifdef DEBUG
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printf(" usnsize=%u\n", usnsize);
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#endif /* DEBUG */
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tmp = (struct UPNPDev *)malloc(sizeof(struct UPNPDev)+urlsize+stsize+usnsize);
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if(tmp == NULL) {
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if (error)
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*error = MINISSDPC_MEMORY_ERROR;
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goto free_url_and_st_and_return;
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}
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tmp->pNext = devlist;
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tmp->descURL = tmp->buffer;
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tmp->st = tmp->buffer + 1 + urlsize;
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memcpy(tmp->buffer, url, urlsize);
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tmp->buffer[urlsize] = '\0';
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memcpy(tmp->st, st, stsize);
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tmp->buffer[urlsize+1+stsize] = '\0';
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free(url);
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free(st);
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url = NULL;
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st = NULL;
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tmp->usn = tmp->buffer + 1 + urlsize + 1 + stsize;
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READ_COPY_BUFFER(tmp->usn, usnsize);
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if(n<=0) {
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if (error)
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*error = MINISSDPC_INVALID_SERVER_REPLY;
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goto free_tmp_and_return;
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}
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tmp->buffer[urlsize+1+stsize+1+usnsize] = '\0';
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tmp->scope_id = 0; /* default value. scope_id is not available with MiniSSDPd */
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devlist = tmp;
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}
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if (error)
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*error = MINISSDPC_SUCCESS;
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return devlist;
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free_url_and_st_and_return:
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free(st);
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free_url_and_return:
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free(url);
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return devlist;
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free_tmp_and_return:
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free(tmp);
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return devlist;
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}
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#endif /* !(defined(_WIN32) || defined(__amigaos__) || defined(__amigaos4__)) */
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/* parseMSEARCHReply()
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* the last 4 arguments are filled during the parsing :
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* - location/locationsize : "location:" field of the SSDP reply packet
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* - st/stsize : "st:" field of the SSDP reply packet.
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* The strings are NOT null terminated */
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static void
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parseMSEARCHReply(const char * reply, int size,
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const char * * location, int * locationsize,
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const char * * st, int * stsize,
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const char * * usn, int * usnsize)
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{
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int a, b, i;
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i = 0;
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a = i; /* start of the line */
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b = 0; /* end of the "header" (position of the colon) */
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while(i<size)
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{
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switch(reply[i])
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{
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case ':':
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if(b==0)
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{
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b = i; /* end of the "header" */
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/*for(j=a; j<b; j++)
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{
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putchar(reply[j]);
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}
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*/
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}
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break;
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case '\x0a':
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case '\x0d':
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if(b!=0)
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{
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/*for(j=b+1; j<i; j++)
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{
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putchar(reply[j]);
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}
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putchar('\n');*/
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/* skip the colon and white spaces */
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do { b++; } while(reply[b]==' ');
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if(0==strncasecmp(reply+a, "location", 8))
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{
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*location = reply+b;
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*locationsize = i-b;
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}
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else if(0==strncasecmp(reply+a, "st", 2))
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{
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*st = reply+b;
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*stsize = i-b;
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}
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else if(0==strncasecmp(reply+a, "usn", 3))
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{
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*usn = reply+b;
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*usnsize = i-b;
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}
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b = 0;
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}
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a = i+1;
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break;
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default:
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break;
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}
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i++;
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}
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}
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/* port upnp discover : SSDP protocol */
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#define SSDP_PORT 1900
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#define XSTR(s) STR(s)
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#define STR(s) #s
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#define UPNP_MCAST_ADDR "239.255.255.250"
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/* for IPv6 */
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#define UPNP_MCAST_LL_ADDR "FF02::C" /* link-local */
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#define UPNP_MCAST_SL_ADDR "FF05::C" /* site-local */
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/* direct discovery if minissdpd responses are not sufficient */
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/* ssdpDiscoverDevices() :
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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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struct UPNPDev *
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ssdpDiscoverDevices(const char * const deviceTypes[],
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int delay, const char * multicastif,
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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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unsigned int scope_id = 0;
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int opt = 1;
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static const char MSearchMsgFmt[] =
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"M-SEARCH * HTTP/1.1\r\n"
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"HOST: %s:" XSTR(SSDP_PORT) "\r\n"
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"ST: %s\r\n"
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"MAN: \"ssdp:discover\"\r\n"
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"MX: %u\r\n"
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"\r\n";
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int deviceIndex;
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char bufr[1536]; /* reception and emission buffer */
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int sudp;
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int n;
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struct sockaddr_storage sockudp_r;
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unsigned int mx;
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#ifdef NO_GETADDRINFO
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struct sockaddr_storage sockudp_w;
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#else
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int rv;
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struct addrinfo hints, *servinfo, *p;
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#endif
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#ifdef _WIN32
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MIB_IPFORWARDROW ip_forward;
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unsigned long _ttl = (unsigned long)ttl;
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#endif
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int linklocal = 1;
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if(error)
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*error = MINISSDPC_UNKNOWN_ERROR;
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if(localport==UPNP_LOCAL_PORT_SAME)
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localport = SSDP_PORT;
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#ifdef _WIN32
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sudp = socket(ipv6 ? PF_INET6 : PF_INET, SOCK_DGRAM, IPPROTO_UDP);
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#else
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sudp = socket(ipv6 ? PF_INET6 : PF_INET, SOCK_DGRAM, 0);
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#endif
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if(sudp < 0)
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{
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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
|
|
&& (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 );
|
|
if (dwRetVal == NO_ERROR) {
|
|
#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 = MINISSDPC_SOCKET_ERROR;
|
|
PRINT_SOCKET_ERROR("setsockopt(SO_REUSEADDR,...)");
|
|
return NULL;
|
|
}
|
|
|
|
#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");
|
|
}
|
|
#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 = 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++) {
|
|
/* 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");
|
|
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(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;
|
|
}
|
|
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 = MINISSDPC_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 = 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;
|
|
}
|
|
|