dev.c

   1 #include <string.h>
   2 #include <errno.h>
   3 #include <sys/ioctl.h>
   4 #include <sys/types.h>
   5 #include <ifaddrs.h>
   6
   7 #include "dev.h"
   8 #include "str.h"
   9 #include "sock.h"
  10 #include "die.h"
  11 #include "link.h"
  12 #include "built_in.h"
  13
  14 int device_ifindex(const char *ifname)
  15 {
  16         int ret, sock, index;
  17         struct ifreq ifr;
  18
  19         if (!strncmp("any", ifname, strlen("any")))
  20                 return 0;
  21
  22         sock = af_socket(AF_INET);
  23
  24         memset(&ifr, 0, sizeof(ifr));
  25         strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
  26
  27         ret = ioctl(sock, SIOCGIFINDEX, &ifr);
  28         if (unlikely(ret))
  29                 panic("Cannot get ifindex from device!\n");
  30
  31         index = ifr.ifr_ifindex;
  32         close(sock);
  33
  34         return index;
  35 }
  36
  37 static int __device_address6(const char *ifname, struct sockaddr_storage *ss)
  38 {
  39         int ret, family, found = -EINVAL;
  40         struct ifaddrs *ifaddr, *ifa;
  41
  42         ret = getifaddrs(&ifaddr);
  43         if (unlikely(ret < 0))
  44                 panic("Cannot get device addresses for IPv6!\n");
  45
  46         for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
  47                 family = ifa->ifa_addr->sa_family;
  48                 if (family != AF_INET6)
  49                         continue;
  50                 if (strcmp(ifa->ifa_name, ifname))
  51                         continue;
  52
  53                 memcpy(ss, ifa->ifa_addr, sizeof(*ss));
  54                 found = 0;
  55                 break;
  56         }
  57
  58         freeifaddrs(ifaddr);
  59         return found;
  60 }
  61
  62 int device_address(const char *ifname, int af, struct sockaddr_storage *ss)
  63 {
  64         int ret, sock;
  65         struct ifreq ifr;
  66
  67         if (unlikely(!ss))
  68                 return -EINVAL;
  69         if (!strncmp("any", ifname, strlen("any")))
  70                 return -EINVAL;
  71         if (af == AF_INET6)
  72                 return __device_address6(ifname, ss);
  73
  74         sock = af_socket(af);
  75
  76         memset(&ifr, 0, sizeof(ifr));
  77         strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
  78
  79         ifr.ifr_addr.sa_family = af;
  80
  81         ret = ioctl(sock, SIOCGIFADDR, &ifr);
  82         if (!ret)
  83                 memcpy(ss, &ifr.ifr_addr, sizeof(ifr.ifr_addr));
  84
  85         close(sock);
  86         return ret;
  87 }
  88
  89 int device_mtu(const char *ifname)
  90 {
  91         int ret, sock, mtu = 0;
  92         struct ifreq ifr;
  93
  94         sock = af_socket(AF_INET);
  95
  96         memset(&ifr, 0, sizeof(ifr));
  97         strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
  98
  99         ret = ioctl(sock, SIOCGIFMTU, &ifr);
 100         if (!ret)
 101                 mtu = ifr.ifr_mtu;
 102
 103         close(sock);
 104         return mtu;
 105 }
 106
 107 short device_get_flags(const char *ifname)
 108 {
 109         short flags = 0;
 110         int ret, sock;
 111         struct ifreq ifr;
 112
 113         sock = af_socket(AF_INET);
 114
 115         memset(&ifr, 0, sizeof(ifr));
 116         strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 117
 118         ret = ioctl(sock, SIOCGIFFLAGS, &ifr);
 119         if (!ret)
 120                 flags = ifr.ifr_flags;
 121
 122         close(sock);
 123         return flags;
 124 }
 125
 126 void device_set_flags(const char *ifname, const short flags)
 127 {
 128         int ret, sock;
 129         struct ifreq ifr;
 130
 131         sock = af_socket(AF_INET);
 132
 133         memset(&ifr, 0, sizeof(ifr));
 134         strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 135         ifr.ifr_flags = flags;
 136
 137         ret = ioctl(sock, SIOCSIFFLAGS, &ifr);
 138         if (ret < 0)
 139                 panic("Cannot set NIC flags!\n");
 140
 141         close(sock);
 142 }
 143
 144 int device_up_and_running(char *ifname)
 145 {
 146         if (!ifname)
 147                 return -EINVAL;
 148         if (!strncmp("any", ifname, strlen("any")))
 149                 return 1;
 150
 151         return (device_get_flags(ifname) &
 152                 (IFF_UP | IFF_RUNNING)) ==
 153                 (IFF_UP | IFF_RUNNING);
 154 }
 155
 156 u32 device_bitrate(const char *ifname)
 157 {
 158         u32 scopper, swireless;
 159
 160         scopper   = ethtool_bitrate(ifname);
 161         swireless = wireless_bitrate(ifname);
 162
 163         return scopper ? : swireless;
 164 }