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1e6d2d09 VD |
1 | /***************************************************************************** |
2 | Copyright (c) 2006 EMC Corporation. | |
3 | Copyright (c) 2011 Factor-SPE | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify it | |
6 | under the terms of the GNU General Public License as published by the Free | |
7 | Software Foundation; either version 2 of the License, or (at your option) | |
8 | any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, but WITHOUT | |
11 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License along with | |
16 | this program; if not, write to the Free Software Foundation, Inc., 59 | |
17 | Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
18 | ||
19 | The full GNU General Public License is included in this distribution in the | |
20 | file called LICENSE. | |
21 | ||
22 | Authors: Srinivas Aji <Aji_Srinivas@emc.com> | |
23 | Authors: Vitalii Demianets <vitas@nppfactor.kiev.ua> | |
24 | ||
25 | ******************************************************************************/ | |
26 | ||
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | #include <unistd.h> | |
30 | #include <stdbool.h> | |
31 | #include <fcntl.h> | |
32 | #include <limits.h> | |
33 | #include <sys/ioctl.h> | |
34 | #include <net/if.h> | |
35 | #include <linux/if_ether.h> | |
36 | #include <linux/ethtool.h> | |
37 | #include <linux/sockios.h> | |
38 | ||
39 | #include "log.h" | |
40 | ||
c6ed0c4c | 41 | static int netsock = -1; |
1e6d2d09 VD |
42 | |
43 | int netsock_init(void) | |
44 | { | |
45 | netsock = socket(AF_INET, SOCK_DGRAM, 0); | |
46 | if(0 > netsock) | |
47 | { | |
48 | ERROR("Couldn't open inet socket for ioctls: %m\n"); | |
49 | return -1; | |
50 | } | |
51 | return 0; | |
52 | } | |
53 | ||
54 | int get_hwaddr(char *ifname, __u8 *hwaddr) | |
55 | { | |
56 | struct ifreq ifr; | |
57 | memset(&ifr, 0, sizeof(ifr)); | |
58 | strncpy(ifr.ifr_name, ifname, IFNAMSIZ); | |
59 | if(0 > ioctl(netsock, SIOCGIFHWADDR, &ifr)) | |
60 | { | |
61 | ERROR("%s: get hw address failed: %m", ifname); | |
62 | return -1; | |
63 | } | |
64 | memcpy(hwaddr, ifr.ifr_hwaddr.sa_data, ETH_ALEN); | |
65 | return 0; | |
66 | } | |
67 | ||
68 | int ethtool_get_link(char *ifname) | |
69 | { | |
70 | struct ifreq ifr; | |
71 | memset(&ifr, 0, sizeof(ifr)); | |
72 | strncpy(ifr.ifr_name, ifname, IFNAMSIZ); | |
73 | struct ethtool_value eval; | |
74 | ||
75 | eval.cmd = ETHTOOL_GLINK; | |
76 | ifr.ifr_data = (caddr_t)&eval; | |
77 | if(0 > ioctl(netsock, SIOCETHTOOL, &ifr)) | |
78 | { | |
79 | ERROR("Cannot get link status for %s: %m\n", ifname); | |
80 | return -1; | |
81 | } | |
82 | if(eval.data) | |
83 | return 1; | |
84 | return 0; | |
85 | } | |
86 | ||
87 | int ethtool_get_speed_duplex(char *ifname, int *speed, int *duplex) | |
88 | { | |
89 | struct ifreq ifr; | |
90 | memset(&ifr, 0, sizeof(ifr)); | |
91 | strncpy(ifr.ifr_name, ifname, IFNAMSIZ); | |
92 | struct ethtool_cmd ecmd; | |
93 | ||
94 | ecmd.cmd = ETHTOOL_GSET; | |
95 | ifr.ifr_data = (caddr_t)&ecmd; | |
96 | if(0 > ioctl(netsock, SIOCETHTOOL, &ifr)) | |
97 | { | |
98 | ERROR("Cannot get speed/duplex for %s: %m\n", ifname); | |
99 | return -1; | |
100 | } | |
101 | *speed = ecmd.speed; /* Ethtool speed is in Mbps */ | |
102 | *duplex = ecmd.duplex; /* We have same convention as ethtool. | |
103 | 0 = half, 1 = full */ | |
104 | return 0; | |
105 | } | |
106 | ||
107 | /********* Sysfs based utility functions *************/ | |
108 | ||
109 | /* This sysfs stuff might break with interface renames */ | |
110 | bool is_bridge(char *if_name) | |
111 | { | |
112 | char path[32 + IFNAMSIZ]; | |
113 | sprintf(path, "/sys/class/net/%s/bridge", if_name); | |
114 | return (0 == access(path, R_OK)); | |
115 | } | |
116 | ||
117 | int get_bridge_portno(char *if_name) | |
118 | { | |
119 | char path[32 + IFNAMSIZ]; | |
120 | sprintf(path, "/sys/class/net/%s/brport/port_no", if_name); | |
121 | char buf[128]; | |
122 | int fd; | |
123 | long res = -1; | |
124 | TSTM((fd = open(path, O_RDONLY)) >= 0, -1, "%m"); | |
125 | int l; | |
126 | TSTM((l = read(fd, buf, sizeof(buf) - 1)) >= 0, -1, "%m"); | |
127 | if(0 == l) | |
128 | { | |
129 | ERROR("Empty port index file"); | |
130 | goto out; | |
131 | } | |
132 | else if((sizeof(buf) - 1) == l) | |
133 | { | |
134 | ERROR("port_index file too long"); | |
135 | goto out; | |
136 | } | |
137 | buf[l] = 0; | |
138 | if('\n' == buf[l - 1]) | |
139 | buf[l - 1] = 0; | |
140 | char *end; | |
141 | res = strtoul(buf, &end, 0); | |
142 | if(0 != *end || INT_MAX < res) | |
143 | { | |
144 | ERROR("Invalid port index %s", buf); | |
145 | res = -1; | |
146 | } | |
147 | out: | |
148 | close(fd); | |
149 | return res; | |
150 | } |