/* $Id: minissdpc.c,v 1.32 2016/10/07 09:04:36 nanard Exp $ */ /* vim: tabstop=4 shiftwidth=4 noexpandtab * Project : miniupnp * Web : http://miniupnp.free.fr/ * Author : Thomas BERNARD * copyright (c) 2005-2018 Thomas Bernard * This software is subjet to the conditions detailed in the * provided LICENCE file. */ /*#include */ #include #include #include #include #if defined (__NetBSD__) #include #endif #if defined(_WIN32) || defined(__amigaos__) || defined(__amigaos4__) #ifdef _WIN32 #include #include #include #include #define snprintf _snprintf #if !defined(_MSC_VER) #include #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 #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 #include #include #include #include #include #include #include #include #include #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 #if defined(__sun) #include #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. * 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(isin6_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; } 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; 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 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; } 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; } 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; }