/* Unix SMB/CIFS implementation. return a list of network interfaces Copyright (C) Andrew Tridgell 1998 Copyright (C) Jeremy Allison 2007 Copyright (C) Jelmer Vernooij 2007 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ #include "includes.h" #include "system/network.h" #include "interfaces.h" #include "lib/util/tsort.h" #include "librpc/gen_ndr/ioctl.h" #ifdef HAVE_ETHTOOL #include "linux/sockios.h" #include "linux/ethtool.h" #endif /**************************************************************************** Create a struct sockaddr_storage with the netmask bits set to 1. ****************************************************************************/ bool make_netmask(struct sockaddr_storage *pss_out, const struct sockaddr_storage *pss_in, unsigned long masklen) { *pss_out = *pss_in; /* Now apply masklen bits of mask. */ #if defined(HAVE_IPV6) if (pss_in->ss_family == AF_INET6) { char *p = (char *)&((struct sockaddr_in6 *)pss_out)->sin6_addr; unsigned int i; if (masklen > 128) { return false; } for (i = 0; masklen >= 8; masklen -= 8, i++) { *p++ = 0xff; } /* Deal with the partial byte. */ *p++ &= (0xff & ~(0xff>>masklen)); i++; for (;i < sizeof(struct in6_addr); i++) { *p++ = '\0'; } return true; } #endif if (pss_in->ss_family == AF_INET) { if (masklen > 32) { return false; } ((struct sockaddr_in *)pss_out)->sin_addr.s_addr = htonl(((0xFFFFFFFFL >> masklen) ^ 0xFFFFFFFFL)); return true; } return false; } /**************************************************************************** Create a struct sockaddr_storage set to the broadcast or network adress from an incoming sockaddr_storage. ****************************************************************************/ static void make_bcast_or_net(struct sockaddr_storage *pss_out, const struct sockaddr_storage *pss_in, const struct sockaddr_storage *nmask, bool make_bcast_p) { unsigned int i = 0, len = 0; const char *pmask = NULL; char *p = NULL; *pss_out = *pss_in; /* Set all zero netmask bits to 1. */ #if defined(HAVE_IPV6) if (pss_in->ss_family == AF_INET6) { p = (char *)&((struct sockaddr_in6 *)pss_out)->sin6_addr; pmask = (const char *)&((const struct sockaddr_in6 *)nmask)->sin6_addr; len = 16; } #endif if (pss_in->ss_family == AF_INET) { p = (char *)&((struct sockaddr_in *)pss_out)->sin_addr; pmask = (const char *)&((const struct sockaddr_in *)nmask)->sin_addr; len = 4; } for (i = 0; i < len; i++, p++, pmask++) { if (make_bcast_p) { *p = (*p & *pmask) | (*pmask ^ 0xff); } else { /* make_net */ *p = (*p & *pmask); } } } void make_bcast(struct sockaddr_storage *pss_out, const struct sockaddr_storage *pss_in, const struct sockaddr_storage *nmask) { make_bcast_or_net(pss_out, pss_in, nmask, true); } void make_net(struct sockaddr_storage *pss_out, const struct sockaddr_storage *pss_in, const struct sockaddr_storage *nmask) { make_bcast_or_net(pss_out, pss_in, nmask, false); } #ifdef HAVE_ETHTOOL static void query_iface_speed_from_name(const char *name, uint64_t *speed) { int ret = 0; struct ethtool_cmd ecmd; struct ethtool_value edata; struct ifreq ifr; int fd; fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP); if (fd == -1) { DBG_ERR("Failed to open socket."); return; } if (strlen(name) >= IF_NAMESIZE) { DBG_ERR("Interface name too long."); goto done; } ZERO_STRUCT(ifr); strlcpy(ifr.ifr_name, name, IF_NAMESIZE); ifr.ifr_data = (void *)&edata; ZERO_STRUCT(edata); edata.cmd = ETHTOOL_GLINK; ret = ioctl(fd, SIOCETHTOOL, &ifr); if (ret == -1) { goto done; } if (edata.data == 0) { /* no link detected */ *speed = 0; goto done; } ifr.ifr_data = (void *)&ecmd; ZERO_STRUCT(ecmd); ecmd.cmd = ETHTOOL_GSET; ret = ioctl(fd, SIOCETHTOOL, &ifr); if (ret == -1) { goto done; } *speed = ((uint64_t)ethtool_cmd_speed(&ecmd)) * 1000 * 1000; done: (void)close(fd); } static void query_iface_rx_queues_from_name(const char *name, uint64_t *rx_queues) { int ret = 0; struct ethtool_rxnfc rxcmd; struct ifreq ifr; int fd; fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP); if (fd == -1) { DBG_ERR("Failed to open socket."); return; } if (strlen(name) >= IF_NAMESIZE) { DBG_ERR("Interface name too long."); goto done; } ZERO_STRUCT(ifr); strlcpy(ifr.ifr_name, name, IF_NAMESIZE); ifr.ifr_data = (void *)&rxcmd; ZERO_STRUCT(rxcmd); rxcmd.cmd = ETHTOOL_GRXRINGS; ret = ioctl(fd, SIOCETHTOOL, &ifr); if (ret == -1) { goto done; } *rx_queues = rxcmd.data; done: (void)close(fd); } #endif /**************************************************************************** Try the "standard" getifaddrs/freeifaddrs interfaces. Also gets IPv6 interfaces. ****************************************************************************/ /**************************************************************************** Get the netmask address for a local interface. ****************************************************************************/ static int _get_interfaces(TALLOC_CTX *mem_ctx, struct iface_struct **pifaces) { struct iface_struct *ifaces; struct ifaddrs *iflist = NULL; struct ifaddrs *ifptr = NULL; int count; int total = 0; size_t copy_size; if (getifaddrs(&iflist) < 0) { return -1; } count = 0; for (ifptr = iflist; ifptr != NULL; ifptr = ifptr->ifa_next) { if (!ifptr->ifa_addr || !ifptr->ifa_netmask) { continue; } if (!(ifptr->ifa_flags & IFF_UP)) { continue; } count += 1; } ifaces = talloc_array(mem_ctx, struct iface_struct, count); if (ifaces == NULL) { errno = ENOMEM; return -1; } /* Loop through interfaces, looking for given IP address */ for (ifptr = iflist; ifptr != NULL; ifptr = ifptr->ifa_next) { uint64_t if_speed = 1000 * 1000 * 1000; /* 1Gbps */ uint64_t rx_queues = 1; if (!ifptr->ifa_addr || !ifptr->ifa_netmask) { continue; } /* Check the interface is up. */ if (!(ifptr->ifa_flags & IFF_UP)) { continue; } memset(&ifaces[total], '\0', sizeof(ifaces[total])); copy_size = sizeof(struct sockaddr_in); ifaces[total].flags = ifptr->ifa_flags; #if defined(HAVE_IPV6) if (ifptr->ifa_addr->sa_family == AF_INET6) { copy_size = sizeof(struct sockaddr_in6); } #endif memcpy(&ifaces[total].ip, ifptr->ifa_addr, copy_size); memcpy(&ifaces[total].netmask, ifptr->ifa_netmask, copy_size); /* calculate broadcast address */ #if defined(HAVE_IPV6) if (ifptr->ifa_addr->sa_family == AF_INET6) { struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)ifptr->ifa_addr; struct in6_addr *in6 = (struct in6_addr *)&sin6->sin6_addr; if (IN6_IS_ADDR_LINKLOCAL(in6) || IN6_IS_ADDR_V4COMPAT(in6)) { continue; } /* IPv6 does not have broadcast it uses multicast. */ memset(&ifaces[total].bcast, '\0', copy_size); } else #endif if (ifaces[total].flags & (IFF_BROADCAST|IFF_LOOPBACK)) { make_bcast(&ifaces[total].bcast, &ifaces[total].ip, &ifaces[total].netmask); } else if ((ifaces[total].flags & IFF_POINTOPOINT) && ifptr->ifa_dstaddr ) { memcpy(&ifaces[total].bcast, ifptr->ifa_dstaddr, copy_size); } else { continue; } ifaces[total].if_index = if_nametoindex(ifptr->ifa_name); if (ifaces[total].if_index == 0) { DBG_ERR("Failed to retrieve interface index for '%s': " "%s\n", ifptr->ifa_name, strerror(errno)); } #ifdef HAVE_ETHTOOL query_iface_speed_from_name(ifptr->ifa_name, &if_speed); query_iface_rx_queues_from_name(ifptr->ifa_name, &rx_queues); #endif ifaces[total].linkspeed = if_speed; ifaces[total].capability = FSCTL_NET_IFACE_NONE_CAPABLE; if (rx_queues > 1) { ifaces[total].capability |= FSCTL_NET_IFACE_RSS_CAPABLE; } if (strlcpy(ifaces[total].name, ifptr->ifa_name, sizeof(ifaces[total].name)) >= sizeof(ifaces[total].name)) { /* Truncation ! Ignore. */ continue; } total++; } freeifaddrs(iflist); *pifaces = ifaces; return total; } static int iface_comp(struct iface_struct *i1, struct iface_struct *i2) { int r; #if defined(HAVE_IPV6) /* * If we have IPv6 - sort these interfaces lower * than any IPv4 ones. */ if (i1->ip.ss_family == AF_INET6 && i2->ip.ss_family == AF_INET) { return -1; } else if (i1->ip.ss_family == AF_INET && i2->ip.ss_family == AF_INET6) { return 1; } if (i1->ip.ss_family == AF_INET6) { struct sockaddr_in6 *s1 = (struct sockaddr_in6 *)&i1->ip; struct sockaddr_in6 *s2 = (struct sockaddr_in6 *)&i2->ip; r = memcmp(&s1->sin6_addr, &s2->sin6_addr, sizeof(struct in6_addr)); if (r) { return r; } s1 = (struct sockaddr_in6 *)&i1->netmask; s2 = (struct sockaddr_in6 *)&i2->netmask; r = memcmp(&s1->sin6_addr, &s2->sin6_addr, sizeof(struct in6_addr)); if (r) { return r; } } #endif /* AIX uses __ss_family instead of ss_family inside of sockaddr_storage. Instead of trying to figure out which field to use, we can just cast it to a sockaddr. */ if (((struct sockaddr *)&i1->ip)->sa_family == AF_INET) { struct sockaddr_in *s1 = (struct sockaddr_in *)&i1->ip; struct sockaddr_in *s2 = (struct sockaddr_in *)&i2->ip; r = ntohl(s1->sin_addr.s_addr) - ntohl(s2->sin_addr.s_addr); if (r) { return r; } s1 = (struct sockaddr_in *)&i1->netmask; s2 = (struct sockaddr_in *)&i2->netmask; return ntohl(s1->sin_addr.s_addr) - ntohl(s2->sin_addr.s_addr); } return 0; } /* this wrapper is used to remove duplicates from the interface list generated above */ int get_interfaces(TALLOC_CTX *mem_ctx, struct iface_struct **pifaces) { struct iface_struct *ifaces = NULL; int total, i, j; total = _get_interfaces(mem_ctx, &ifaces); /* If we have an error, no interface or just one we can leave */ if (total <= 1) { *pifaces = ifaces; return total; } /* now we need to remove duplicates */ TYPESAFE_QSORT(ifaces, total, iface_comp); for (i=1;i