| /***************************************************************************** |
| Copyright (c) 2006 EMC Corporation. |
| |
| 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 2 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, write to the Free Software Foundation, Inc., 59 |
| Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| |
| The full GNU General Public License is included in this distribution in the |
| file called LICENSE. |
| |
| Authors: Srinivas Aji <Aji_Srinivas@emc.com> |
| |
| ******************************************************************************/ |
| |
| #include "netif_utils.h" |
| |
| #include <errno.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <stdint.h> |
| #include <sys/socket.h> |
| #include <sys/ioctl.h> |
| #include <fcntl.h> |
| #include <limits.h> |
| |
| #include <net/if.h> |
| #include <linux/if_ether.h> |
| #include <linux/ethtool.h> |
| #include <linux/sockios.h> |
| |
| #include "log.h" |
| |
| int netsock = -1; |
| |
| int netsock_init(void) |
| { |
| LOG(""); |
| netsock = socket(AF_INET, SOCK_DGRAM, 0); |
| if (netsock < 0) { |
| ERROR("Couldn't open inet socket for ioctls: %m\n"); |
| return -1; |
| } |
| return 0; |
| } |
| |
| int get_hwaddr(char *ifname, unsigned char *hwaddr) |
| { |
| struct ifreq ifr; |
| memset(&ifr, 0, sizeof(ifr)); |
| strncpy(ifr.ifr_name, ifname, IFNAMSIZ); |
| if (ioctl(netsock, SIOCGIFHWADDR, &ifr) < 0) { |
| ERROR("%s: get hw address failed: %m", ifname); |
| return -1; |
| } |
| memcpy(hwaddr, ifr.ifr_hwaddr.sa_data, ETH_ALEN); |
| return 0; |
| } |
| |
| int ethtool_get_speed_duplex(char *ifname, int *speed, int *duplex) |
| { |
| struct ifreq ifr; |
| memset(&ifr, 0, sizeof(ifr)); |
| strncpy(ifr.ifr_name, ifname, IFNAMSIZ); |
| struct ethtool_cmd ecmd; |
| |
| ecmd.cmd = ETHTOOL_GSET; |
| ifr.ifr_data = (caddr_t) & ecmd; |
| if (ioctl(netsock, SIOCETHTOOL, &ifr) < 0) { |
| ERROR("Cannot get link status for %s: %m\n", ifname); |
| return -1; |
| } |
| *speed = ecmd.speed; /* Ethtool speed is in Mbps */ |
| *duplex = ecmd.duplex; /* We have same convention as ethtool. |
| 0 = half, 1 = full */ |
| return 0; |
| } |
| |
| /********* Sysfs based utility functions *************/ |
| |
| /* This sysfs stuff might break with interface renames */ |
| int is_bridge(char *if_name) |
| { |
| char path[32 + IFNAMSIZ]; |
| sprintf(path, "/sys/class/net/%s/bridge", if_name); |
| return (access(path, R_OK) == 0); |
| } |
| |
| /* This will work even less if the bridge port is renamed after being |
| joined to the bridge. |
| */ |
| int is_bridge_slave(char *br_name, char *if_name) |
| { |
| char path[32 + 2 * IFNAMSIZ]; |
| sprintf(path, "/sys/class/net/%s/brif/%s", br_name, if_name); |
| return (access(path, R_OK) == 0); |
| } |
| |
| int get_bridge_portno(char *if_name) |
| { |
| char path[32 + IFNAMSIZ]; |
| sprintf(path, "/sys/class/net/%s/brport/port_no", if_name); |
| char buf[128]; |
| int fd; |
| long res = -1; |
| TSTM((fd = open(path, O_RDONLY)) >= 0, -1, "%m"); |
| int l; |
| TSTM((l = read(fd, buf, sizeof(buf) - 1)) >= 0, -1, "%m"); |
| if (l == 0) { |
| ERROR("Empty port index file"); |
| goto out; |
| } else if (l == sizeof(buf) - 1) { |
| ERROR("port_index file too long"); |
| goto out; |
| } |
| buf[l] = 0; |
| if (buf[l - 1] == '\n') |
| buf[l - 1] = 0; |
| char *end; |
| res = strtoul(buf, &end, 0); |
| if (*end != 0 || res > INT_MAX) { |
| ERROR("Invalid port index %s", buf); |
| res = -1; |
| } |
| out: |
| close(fd); |
| return res; |
| } |