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    Contents of /trunk/mkinitrd-magellan/klibc/usr/kinit/ipconfig/netdev.c

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    Revision 532 - (show annotations) (download)
    Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
    File MIME type: text/plain
    File size: 5094 byte(s) 
    -import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
    1 /*
    2 * ioctl-based device configuration
    3 */
    4 #include <sys/types.h>
    5 #include <sys/socket.h>
    6 #include <sys/ioctl.h>
    7 #include <errno.h>
    8 #include <stdio.h>
    9 #include <string.h>
    10 #include <unistd.h>
    11 #include <net/if.h>
    12 #include <net/if_arp.h>
    13 #include <netinet/in.h>
    14 #include <linux/route.h>
    15
    16 #include "netdev.h"
    17
    18 static int cfd = -1;
    19
    20 static void copy_name(struct netdev *dev, struct ifreq *ifr)
    21 {
    22 strncpy(ifr->ifr_name, dev->name, sizeof(ifr->ifr_name));
    23 ifr->ifr_name[sizeof(ifr->ifr_name) - 1] = '\0';
    24 }
    25
    26 int netdev_getflags(struct netdev *dev, short *flags)
    27 {
    28 struct ifreq ifr;
    29
    30 copy_name(dev, &ifr);
    31
    32 if (ioctl(cfd, SIOCGIFFLAGS, &ifr) == -1) {
    33 perror("SIOCGIFFLAGS");
    34 return -1;
    35 }
    36
    37 *flags = ifr.ifr_flags;
    38 return 0;
    39 }
    40
    41 static int netdev_sif_addr(struct ifreq *ifr, int cmd, uint32_t addr)
    42 {
    43 struct sockaddr_in *sin = (struct sockaddr_in *)&ifr->ifr_addr;
    44
    45 sin->sin_family = AF_INET;
    46 sin->sin_addr.s_addr = addr;
    47
    48 return ioctl(cfd, cmd, ifr);
    49 }
    50
    51 int netdev_setaddress(struct netdev *dev)
    52 {
    53 struct ifreq ifr;
    54
    55 copy_name(dev, &ifr);
    56
    57 if (dev->ip_addr != INADDR_ANY &&
    58 netdev_sif_addr(&ifr, SIOCSIFADDR, dev->ip_addr) == -1) {
    59 perror("SIOCSIFADDR");
    60 return -1;
    61 }
    62
    63 if (dev->ip_broadcast != INADDR_ANY &&
    64 netdev_sif_addr(&ifr, SIOCSIFBRDADDR, dev->ip_broadcast) == -1) {
    65 perror("SIOCSIFBRDADDR");
    66 return -1;
    67 }
    68
    69 if (dev->ip_netmask != INADDR_ANY &&
    70 netdev_sif_addr(&ifr, SIOCSIFNETMASK, dev->ip_netmask) == -1) {
    71 perror("SIOCSIFNETMASK");
    72 return -1;
    73 }
    74
    75 return 0;
    76 }
    77
    78 int netdev_setdefaultroute(struct netdev *dev)
    79 {
    80 struct rtentry r;
    81
    82 if (dev->ip_gateway == INADDR_ANY)
    83 return 0;
    84
    85 memset(&r, 0, sizeof(r));
    86
    87 ((struct sockaddr_in *)&r.rt_dst)->sin_family = AF_INET;
    88 ((struct sockaddr_in *)&r.rt_dst)->sin_addr.s_addr = INADDR_ANY;
    89 ((struct sockaddr_in *)&r.rt_gateway)->sin_family = AF_INET;
    90 ((struct sockaddr_in *)&r.rt_gateway)->sin_addr.s_addr =
    91 dev->ip_gateway;
    92 ((struct sockaddr_in *)&r.rt_genmask)->sin_family = AF_INET;
    93 ((struct sockaddr_in *)&r.rt_genmask)->sin_addr.s_addr = INADDR_ANY;
    94 r.rt_flags = RTF_UP | RTF_GATEWAY;
    95
    96 if (ioctl(cfd, SIOCADDRT, &r) == -1 && errno != EEXIST) {
    97 perror("SIOCADDRT");
    98 return -1;
    99 }
    100 return 0;
    101 }
    102
    103 int netdev_setmtu(struct netdev *dev)
    104 {
    105 struct ifreq ifr;
    106
    107 copy_name(dev, &ifr);
    108 ifr.ifr_mtu = dev->mtu;
    109
    110 return ioctl(cfd, SIOCSIFMTU, &ifr);
    111 }
    112
    113 static int netdev_gif_addr(struct ifreq *ifr, int cmd, uint32_t * ptr)
    114 {
    115 struct sockaddr_in *sin = (struct sockaddr_in *)&ifr->ifr_addr;
    116
    117 if (ioctl(cfd, cmd, ifr) == -1)
    118 return -1;
    119
    120 *ptr = sin->sin_addr.s_addr;
    121
    122 return 0;
    123 }
    124
    125 int netdev_up(struct netdev *dev)
    126 {
    127 struct ifreq ifr;
    128
    129 copy_name(dev, &ifr);
    130
    131 if (ioctl(cfd, SIOCGIFFLAGS, &ifr) == -1) {
    132 perror("SIOCGIFFLAGS");
    133 return -1;
    134 }
    135
    136 ifr.ifr_flags |= IFF_UP;
    137
    138 if (ioctl(cfd, SIOCSIFFLAGS, &ifr) == -1) {
    139 perror("SIOCSIFFLAGS");
    140 return -1;
    141 }
    142 return 0;
    143 }
    144
    145 int netdev_down(struct netdev *dev)
    146 {
    147 struct ifreq ifr;
    148
    149 copy_name(dev, &ifr);
    150
    151 if (ioctl(cfd, SIOCGIFFLAGS, &ifr) == -1) {
    152 perror("SIOCGIFFLAGS");
    153 return -1;
    154 }
    155
    156 ifr.ifr_flags &= ~IFF_UP;
    157
    158 if (ioctl(cfd, SIOCSIFFLAGS, &ifr) == -1) {
    159 perror("SIOCSIFFLAGS");
    160 return -1;
    161 }
    162 return 0;
    163 }
    164
    165 int netdev_init_if(struct netdev *dev)
    166 {
    167 struct ifreq ifr;
    168
    169 if (cfd == -1)
    170 cfd = socket(AF_INET, SOCK_DGRAM, 0);
    171 if (cfd == -1) {
    172 fprintf(stderr, "ipconfig: %s: socket(AF_INET): %s\n",
    173 dev->name, strerror(errno));
    174 return -1;
    175 }
    176
    177 copy_name(dev, &ifr);
    178
    179 if (ioctl(cfd, SIOCGIFINDEX, &ifr) == -1) {
    180 fprintf(stderr, "ipconfig: %s: SIOCGIFINDEX: %s\n",
    181 dev->name, strerror(errno));
    182 return -1;
    183 }
    184
    185 dev->ifindex = ifr.ifr_ifindex;
    186
    187 if (ioctl(cfd, SIOCGIFMTU, &ifr) == -1) {
    188 fprintf(stderr, "ipconfig: %s: SIOCGIFMTU: %s\n",
    189 dev->name, strerror(errno));
    190 return -1;
    191 }
    192
    193 dev->mtu = ifr.ifr_mtu;
    194
    195 if (ioctl(cfd, SIOCGIFHWADDR, &ifr) == -1) {
    196 fprintf(stderr, "ipconfig: %s: SIOCGIFHWADDR: %s\n",
    197 dev->name, strerror(errno));
    198 return -1;
    199 }
    200
    201 dev->hwtype = ifr.ifr_hwaddr.sa_family;
    202 dev->hwlen = 0;
    203
    204 switch (dev->hwtype) {
    205 case ARPHRD_ETHER:
    206 dev->hwlen = 6;
    207 break;
    208 case ARPHRD_EUI64:
    209 dev->hwlen = 8;
    210 break;
    211 case ARPHRD_LOOPBACK:
    212 dev->hwlen = 0;
    213 break;
    214 default:
    215 return -1;
    216 }
    217
    218 memcpy(dev->hwaddr, ifr.ifr_hwaddr.sa_data, dev->hwlen);
    219 memset(dev->hwbrd, 0xff, dev->hwlen);
    220
    221 /*
    222 * Try to get the current interface information.
    223 */
    224 if (dev->ip_addr == INADDR_NONE &&
    225 netdev_gif_addr(&ifr, SIOCGIFADDR, &dev->ip_addr) == -1) {
    226 fprintf(stderr, "ipconfig: %s: SIOCGIFADDR: %s\n",
    227 dev->name, strerror(errno));
    228 dev->ip_addr = 0;
    229 dev->ip_broadcast = 0;
    230 dev->ip_netmask = 0;
    231 return 0;
    232 }
    233
    234 if (dev->ip_broadcast == INADDR_NONE &&
    235 netdev_gif_addr(&ifr, SIOCGIFBRDADDR, &dev->ip_broadcast) == -1) {
    236 fprintf(stderr, "ipconfig: %s: SIOCGIFBRDADDR: %s\n",
    237 dev->name, strerror(errno));
    238 dev->ip_broadcast = 0;
    239 }
    240
    241 if (dev->ip_netmask == INADDR_NONE &&
    242 netdev_gif_addr(&ifr, SIOCGIFNETMASK, &dev->ip_netmask) == -1) {
    243 fprintf(stderr, "ipconfig: %s: SIOCGIFNETMASK: %s\n",
    244 dev->name, strerror(errno));
    245 dev->ip_netmask = 0;
    246 }
    247
    248 return 0;
    249 }