/* * $HEADER$ */ #include "ompi_config.h" #include #ifdef HAVE_UNISTD_H #include #endif #include #ifdef HAVE_SYS_TYPES_H #include #endif #ifdef HAVE_SYS_SOCKET_H #include #endif #ifdef HAVE_SYS_IOCTL_H #include #endif #ifdef HAVE_NETINET_IN_H #include #endif #ifdef HAVE_ARPA_INET_H #include #endif #ifdef HAVE_NET_IF_H #include #endif #ifdef HAVE_NETDB_H #include #endif #include "include/constants.h" #include "class/ompi_list.h" #include "util/if.h" #include "util/output.h" #include "util/strncpy.h" #ifndef IF_NAMESIZE #define IF_NAMESIZE 32 #endif struct ompi_if_t { ompi_list_item_t super; char if_name[IF_NAMESIZE]; int if_index; #ifndef WIN32 int if_flags; #else u_long if_flags; #endif int if_speed; struct sockaddr_in if_addr; struct sockaddr_in if_mask; #ifdef WIN32 struct sockaddr_in if_bcast; #endif uint32_t if_bandwidth; }; typedef struct ompi_if_t ompi_if_t; static ompi_list_t ompi_if_list; /* * Discover the list of configured interfaces. Don't care about any * interfaces that are not up or are local loopbacks. */ static int ompi_ifinit(void) { #ifndef WIN32 char buff[1024]; char *ptr; struct ifconf ifconf; int sd; ifconf.ifc_len = sizeof(buff); ifconf.ifc_buf = buff; if (ompi_list_get_size(&ompi_if_list) > 0) return OMPI_SUCCESS; if((sd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { ompi_output(0, "ompi_ifinit: socket() failed with errno=%d\n", errno); return OMPI_ERROR; } if(ioctl(sd, SIOCGIFCONF, &ifconf) < 0) { ompi_output(0, "ompi_ifinit: ioctl(SIOCGIFCONF) failed with errno=%d", errno); close(sd); return OMPI_ERROR; } OBJ_CONSTRUCT(&ompi_if_list, ompi_list_t); for(ptr = buff; ptr < buff + ifconf.ifc_len; ) { struct ifreq* ifr = (struct ifreq*)ptr; ompi_if_t intf; ompi_if_t *intf_ptr; OBJ_CONSTRUCT(&intf, ompi_list_item_t); #if defined(__APPLE__) ptr += (sizeof(ifr->ifr_name) + MAX(sizeof(struct sockaddr),ifr->ifr_addr.sa_len)); #else #if 0 switch(ifr->ifr_addr.sa_family) { case AF_INET6: ptr += sizeof(ifr->ifr_name) + sizeof(struct sockaddr_in6); break; case AF_INET: default: ptr += sizeof(ifr->ifr_name) + sizeof(struct sockaddr); break; } #else /* Jeff/George/Graham fix. According to LAM/MPI and FT-MPI and /usr/include/linux/if.h, you should really be advancing by sizeof(struct ifreq) -- sizeof(ifr->ifr_name) + sizeof(struct sockaddr) may be smaller than sizeof(struct ifreq). More specifically, the second element of struct ifreq may be a union, of which struct sockaddr is only one element (and may not be the smallest). */ ptr += sizeof(struct ifreq); #endif #endif if(ifr->ifr_addr.sa_family != AF_INET) continue; if(ioctl(sd, SIOCGIFFLAGS, ifr) < 0) { ompi_output(0, "ompi_ifinit: ioctl(SIOCGIFFLAGS) failed with errno=%d", errno); continue; } if ((ifr->ifr_flags & IFF_UP) == 0) continue; #if 0 if ((ifr->ifr_flags & IFF_LOOPBACK) != 0) continue; #endif strcpy(intf.if_name, ifr->ifr_name); intf.if_flags = ifr->ifr_flags; #if defined(__APPLE__) intf.if_index = ompi_list_get_size(&ompi_if_list)+1; #else if(ioctl(sd, SIOCGIFINDEX, ifr) < 0) { ompi_output(0,"ompi_ifinit: ioctl(SIOCGIFINDEX) failed with errno=%d", errno); continue; } #if defined(ifr_ifindex) intf.if_index = ifr->ifr_ifindex; #elif defined(ifr_index) intf.if_index = ifr->ifr_index; #else intf.if_index = -1; #endif #endif /* __APPLE__ */ if(ioctl(sd, SIOCGIFADDR, ifr) < 0) { ompi_output(0, "ompi_ifinit: ioctl(SIOCGIFADDR) failed with errno=%d", errno); break; } if(ifr->ifr_addr.sa_family != AF_INET) continue; memcpy(&intf.if_addr, &ifr->ifr_addr, sizeof(intf.if_addr)); if(ioctl(sd, SIOCGIFNETMASK, ifr) < 0) { ompi_output(0, "ompi_ifinit: ioctl(SIOCGIFNETMASK) failed with errno=%d", errno); continue; } memcpy(&intf.if_mask, &ifr->ifr_addr, sizeof(intf.if_mask)); intf_ptr = (ompi_if_t*) malloc(sizeof(ompi_if_t)); if(intf_ptr == 0) { ompi_output(0, "ompi_ifinit: unable to allocated %d bytes\n", sizeof(ompi_if_t)); return OMPI_ERR_OUT_OF_RESOURCE; } memcpy(intf_ptr, &intf, sizeof(intf)); ompi_list_append(&ompi_if_list, (ompi_list_item_t*)intf_ptr); } close(sd); #else /* WIN32 implementation begins */ /* 1. check if the interface info list is already populated. If so, return 2. get the interface information which is required using WSAIoctl 3. construct ompi_if_list and populate it with the list of interfaces we have CAVEAT: Does not support the following options which are supported in SIOCGIFCONF - kernel table index - interface name */ #define MAX_INTERFACES 10 /* Anju: for now assume there are no more than this */ int ret; WSADATA win_sock_data; SOCKET sd; INTERFACE_INFO if_list[MAX_INTERFACES]; int num_interfaces; unsigned long num_bytes_returned; int i; SOCKADDR_IN *sock_address; unsigned int interface_counter = 0; ompi_if_t intf; ompi_if_t *intf_ptr; /* return if this has been done before */ if (0 > ompi_list_get_size(&ompi_if_list)) { return OMPI_SUCCESS; } /* else initialise the use of Winsock2.DLL */ if (WSAStartup (MAKEWORD (2, 2), &win_sock_data) != 0) { ompi_output(0, "ompi_ifinit: WSAStartup failed with errno=%d\n",WSAGetLastError()); return OMPI_ERROR; } /* create a socket */ sd = WSASocket (AF_INET, SOCK_DGRAM, IPPROTO_UDP, NULL, 0, 0); if (sd == SOCKET_ERROR) { ompi_output(0, "ompi_ifinit: WSASocket failed with errno=%d\n",WSAGetLastError()); return OMPI_ERROR; } /* get the information about the interfaces */ if (SOCKET_ERROR == WSAIoctl (sd, SIO_GET_INTERFACE_LIST, NULL, 0, &if_list, sizeof (if_list), &num_bytes_returned, 0, 0)) { ompi_output(0, "ompi_ifinit: WSAIoctl failed with errno=%d\n",WSAGetLastError()); return OMPI_ERROR; } /* create and populate ompi_if_list */ OBJ_CONSTRUCT (&ompi_if_list, ompi_list_t); /* loop through all the interfaces and create the list */ num_interfaces = num_bytes_returned / sizeof (INTERFACE_INFO); for (i = 0; i < num_interfaces; ++i) { /* do all this only if the interface is up */ if (if_list[i].iiFlags & IFF_UP) { OBJ_CONSTRUCT (&intf, ompi_list_item_t); /* fill in the interface address */ memcpy (&intf.if_addr, &(if_list[i].iiAddress), sizeof(intf.if_addr)); /* fill in the netmask information */ memcpy (&intf.if_mask, &(if_list[i].iiNetmask), sizeof(intf.if_mask)); /* fill in the bcast address */ memcpy (&intf.if_bcast, &(if_list[i].iiBroadcastAddress), sizeof(intf.if_bcast)); /* fill in the flags */ intf.if_flags = if_list[i].iiFlags; /* fill in the index in the table */ intf.if_index = ompi_list_get_size(&ompi_if_list)+1; /* generate the interface name on your own .... loopback: lo Rest: eth0, eth1, ..... */ if (if_list[i].iiFlags & IFF_LOOPBACK) { sprintf (intf.if_name, "lo"); } else { sprintf (intf.if_name, "eth%u", interface_counter++); } /* copy all this into a persistent form and store it in the list */ intf_ptr = malloc(sizeof(ompi_if_t)); if (NULL == intf_ptr) { ompi_output (0,"ompi_ifinit: Unable to malloc %d bytes",sizeof(ompi_list_t)); return OMPI_ERR_OUT_OF_RESOURCE; } memcpy (intf_ptr, &intf, sizeof(intf)); ompi_list_append(&ompi_if_list, (ompi_list_item_t *)intf_ptr); } } /* this takes care of the cleanup for us :-D */ WSACleanup (); #endif return OMPI_SUCCESS; } /* * Look for interface by name and returns its address * as a dotted decimal formatted string. */ int ompi_ifnametoaddr(const char* if_name, struct sockaddr* addr, int length) { ompi_if_t* intf; int rc = ompi_ifinit(); if(rc != OMPI_SUCCESS) return rc; for(intf = (ompi_if_t*)ompi_list_get_first(&ompi_if_list); intf != (ompi_if_t*)ompi_list_get_end(&ompi_if_list); intf = (ompi_if_t*)ompi_list_get_next(intf)) { if(strcmp(intf->if_name, if_name) == 0) { memcpy(addr, &intf->if_addr, length); return OMPI_SUCCESS; } } return OMPI_ERROR; } /* * Look for interface by name and returns its * corresponding kernel index. */ int ompi_ifnametoindex(const char* if_name) { ompi_if_t* intf; int rc = ompi_ifinit(); if(rc != OMPI_SUCCESS) return rc; for(intf = (ompi_if_t*)ompi_list_get_first(&ompi_if_list); intf != (ompi_if_t*)ompi_list_get_end(&ompi_if_list); intf = (ompi_if_t*)ompi_list_get_next(intf)) { if(strcmp(intf->if_name, if_name) == 0) { return intf->if_index; } } return -1; } /* * Attempt to resolve the adddress as either a dotted decimal formated * string or a hostname and lookup corresponding interface. */ int ompi_ifaddrtoname(const char* if_addr, char* if_name, int length) { ompi_if_t* intf; #ifndef WIN32 in_addr_t inaddr; #else unsigned long inaddr; #endif int rc; struct hostent *h; inaddr = inet_addr(if_addr); rc = ompi_ifinit(); if(rc != OMPI_SUCCESS) return rc; if(inaddr == INADDR_NONE) { h = gethostbyname(if_addr); if(h == 0) { ompi_output(0,"ompi_ifaddrtoname: unable to resolve %s\n", if_addr); return OMPI_ERR_NOT_FOUND; } memcpy(&inaddr, h->h_addr, sizeof(inaddr)); } for(intf = (ompi_if_t*)ompi_list_get_first(&ompi_if_list); intf != (ompi_if_t*)ompi_list_get_end(&ompi_if_list); intf = (ompi_if_t*)ompi_list_get_next(intf)) { if(intf->if_addr.sin_addr.s_addr == inaddr) { strncpy(if_name, intf->if_name, length); return OMPI_SUCCESS; } } return OMPI_ERR_NOT_FOUND; } /* * Return the number of discovered interface. */ int ompi_ifcount() { if(ompi_ifinit() != OMPI_SUCCESS) return (-1); return ompi_list_get_size(&ompi_if_list); } /* * Return the kernels interface index for the first * interface in our list. */ int ompi_ifbegin() { ompi_if_t *intf; if(ompi_ifinit() != OMPI_SUCCESS) return (-1); intf = (ompi_if_t*)ompi_list_get_first(&ompi_if_list); if(NULL != intf) return intf->if_index; return (-1); } /* * Located the current position in the list by if_index and * return the interface index of the next element in our list * (if it exists). */ int ompi_ifnext(int if_index) { ompi_if_t *intf; if(ompi_ifinit() != OMPI_SUCCESS) return (-1); for(intf = (ompi_if_t*)ompi_list_get_first(&ompi_if_list); intf != (ompi_if_t*)ompi_list_get_end(&ompi_if_list); intf = (ompi_if_t*)ompi_list_get_next(intf)) { if(intf->if_index == if_index) { do { ompi_if_t* if_next = (ompi_if_t*)ompi_list_get_next(intf); ompi_if_t* if_end = (ompi_if_t*)ompi_list_get_end(&ompi_if_list); if (if_next == if_end) { return -1; } intf = if_next; } while(intf->if_index == if_index); return intf->if_index; } } return (-1); } /* * Lookup the interface by kernel index and return the * primary address assigned to the interface. */ int ompi_ifindextoaddr(int if_index, struct sockaddr* if_addr, int length) { ompi_if_t* intf; int rc = ompi_ifinit(); if(rc != OMPI_SUCCESS) return rc; for(intf = (ompi_if_t*)ompi_list_get_first(&ompi_if_list); intf != (ompi_if_t*)ompi_list_get_end(&ompi_if_list); intf = (ompi_if_t*)ompi_list_get_next(intf)) { if(intf->if_index == if_index) { memcpy(if_addr, &intf->if_addr, length); return OMPI_SUCCESS; } } return OMPI_ERROR; } /* * Lookup the interface by kernel index and return the * network mask assigned to the interface. */ int ompi_ifindextomask(int if_index, struct sockaddr* if_mask, int length) { ompi_if_t* intf; int rc = ompi_ifinit(); if(rc != OMPI_SUCCESS) return rc; for(intf = (ompi_if_t*)ompi_list_get_first(&ompi_if_list); intf != (ompi_if_t*)ompi_list_get_end(&ompi_if_list); intf = (ompi_if_t*)ompi_list_get_next(intf)) { if(intf->if_index == if_index) { memcpy(if_mask, &intf->if_mask, length); return OMPI_SUCCESS; } } return OMPI_ERROR; } /* * Lookup the interface by kernel index and return * the associated name. */ int ompi_ifindextoname(int if_index, char* if_name, int length) { ompi_if_t *intf; int rc = ompi_ifinit(); if(rc != OMPI_SUCCESS) return rc; for(intf = (ompi_if_t*)ompi_list_get_first(&ompi_if_list); intf != (ompi_if_t*)ompi_list_get_end(&ompi_if_list); intf = (ompi_if_t*)ompi_list_get_next(intf)) { if(intf->if_index == if_index) { strncpy(if_name, intf->if_name, length); return OMPI_SUCCESS; } } return OMPI_ERROR; } bool ompi_ifislocal(char *hostname) { const int len = 100; char addrname[len - 1]; int ret; ret = ompi_ifaddrtoname(hostname, addrname, len); if (OMPI_SUCCESS == ret) return true; return false; }