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|
/* ifconfig.c - Configure network interface.
*
* Copyright 2012 Ranjan Kumar <ranjankumar.bth@gmail.com>
* Copyright 2012 Kyungwan Han <asura321@gamil.com>
* Reviewed by Kyungsu Kim <kaspyx@gmail.com>
*
* Not in SUSv4.
USE_IFCONFIG(NEWTOY(ifconfig, "?a", TOYFLAG_BIN))
config IFCONFIG
bool "ifconfig"
default n
help
usage: ifconfig [-a] interface [address]
Configure network interface.
[add ADDRESS[/PREFIXLEN]]
[del ADDRESS[/PREFIXLEN]]
[[-]broadcast [ADDRESS]] [[-]pointopoint [ADDRESS]]
[netmask ADDRESS] [dstaddr ADDRESS]
[outfill NN] [keepalive NN]
[hw ether|infiniband ADDRESS] [metric NN] [mtu NN]
[[-]trailers] [[-]arp] [[-]allmulti]
[multicast] [[-]promisc] [txqueuelen NN] [[-]dynamic]
[mem_start NN] [io_addr NN] [irq NN]
[up|down] ...
*/
#define FOR_ifconfig
#include "toys.h"
#include "toynet.h"
#include <net/if.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
typedef struct sockaddr_with_len {
union {
struct sockaddr sock;
struct sockaddr_in sock_in;
struct sockaddr_in6 sock_in6;
}sock_u;
socklen_t socklen;
} sockaddr_with_len;
unsigned get_strtou(char *, char **, int);
char *address_to_name(struct sockaddr *);
sockaddr_with_len *get_sockaddr(char *, int, sa_family_t);
typedef struct _proc_net_dev_info {
char ifrname[IFNAMSIZ]; //interface name.
unsigned long long receive_bytes; //total bytes received
unsigned long long receive_packets; //total packets received
unsigned long receive_errors; //bad packets received
unsigned long receive_drop; //no space in linux buffers
unsigned long receive_fifo; //receiver fifo overrun
unsigned long receive_frame; //received frame alignment error
unsigned long receive_compressed;
unsigned long receive_multicast; //multicast packets received
unsigned long long transmit_bytes; //total bytes transmitted
unsigned long long transmit_packets; //total packets transmitted
unsigned long transmit_errors; //packet transmit problems
unsigned long transmit_drop; //no space available in linux
unsigned long transmit_fifo;
unsigned long transmit_colls;
unsigned long transmit_carrier;
unsigned long transmit_compressed; //num_tr_compressed;
} PROC_NET_DEV_INFO;
// man netdevice
typedef struct _iface_list {
int hw_type;
short ifrflags; //used for addr, broadcast, and mask.
short ifaddr; //if set print ifraddr, irrdstaddr, ifrbroadaddr and ifrnetmask.
struct sockaddr ifraddr;
struct sockaddr ifrdstaddr;
struct sockaddr ifrbroadaddr;
struct sockaddr ifrnetmask;
struct sockaddr ifrhwaddr;
int ifrmtu;
int ifrmetric;
PROC_NET_DEV_INFO dev_info;
int txqueuelen;
struct ifmap ifrmap;
int non_virtual_iface;
struct _iface_list *next; //, *prev;
} IFACE_LIST;
#define HW_NAME_LEN 20
#define HW_TITLE_LEN 30
typedef struct _hw_info {
char hw_name[HW_NAME_LEN];
char hw_title[HW_TITLE_LEN];
int hw_addrlen;
} HW_INFO;
static char *field_format[] = {
"%n%llu%u%u%u%u%n%n%n%llu%u%u%u%u%u",
"%llu%llu%u%u%u%u%n%n%llu%llu%u%u%u%u%u",
"%llu%llu%u%u%u%u%u%u%llu%llu%u%u%u%u%u%u"
};
#define NO_RANGE -1
#define IO_MAP_INDEX 0x100
static int show_iface(char *iface_name);
static void print_ip6_addr(IFACE_LIST *l_ptr);
static void clear_list(void);
//from /net/if.h
static char *iface_flags_str[] = {
"UP",
"BROADCAST",
"DEBUG",
"LOOPBACK",
"POINTOPOINT",
"NOTRAILERS",
"RUNNING",
"NOARP",
"PROMISC",
"ALLMULTI",
"MASTER",
"SLAVE",
"MULTICAST",
"PORTSEL",
"AUTOMEDIA",
"DYNAMIC",
NULL
};
//from /usr/include/linux/netdevice.h
#ifdef IFF_PORTSEL
//Media selection options.
# ifndef IF_PORT_UNKNOWN
enum {
IF_PORT_UNKNOWN = 0,
IF_PORT_10BASE2,
IF_PORT_10BASET,
IF_PORT_AUI,
IF_PORT_100BASET,
IF_PORT_100BASETX,
IF_PORT_100BASEFX
};
# endif
#endif
//from kernel header ipv6.h
#define IPV6_ADDR_ANY 0x0000U
#define IPV6_ADDR_LOOPBACK 0x0010U
#define IPV6_ADDR_LINKLOCAL 0x0020U
#define IPV6_ADDR_SITELOCAL 0x0040U
#define IPV6_ADDR_COMPATv4 0x0080U
//==================================================================================
//for the param settings.
//for ipv6 add/del
struct ifreq_inet6 {
struct in6_addr ifrinte6_addr;
uint32_t ifrinet6_prefixlen;
int ifrinet6_ifindex;
};
#ifndef SIOCSKEEPALIVE
# define SIOCSKEEPALIVE (SIOCDEVPRIVATE) /* Set keepalive timeout in sec */
# define SIOCGKEEPALIVE (SIOCDEVPRIVATE+1) /* Get keepalive timeout */
#endif
#ifndef SIOCSOUTFILL
# define SIOCSOUTFILL (SIOCDEVPRIVATE+2) /* Set outfill timeout */
# define SIOCGOUTFILL (SIOCDEVPRIVATE+3) /* Get outfill timeout */
#endif
#ifndef INFINIBAND_ALEN
# define INFINIBAND_ALEN 20
#endif
static void set_data(int sockfd, struct ifreq *ifre, char *kval, int request, char *req_name);
static void set_flags(int sockfd, struct ifreq *ifre, int arg_flag, int flag); //verify
static void set_mtu(int sockfd, struct ifreq *ifre, char *mtu); //verify
static void set_metric(int sockfd, struct ifreq *ifre, char *metric); //verify
static void set_qlen(int sockfd, struct ifreq *ifre, char *qlen); //verify
static void set_address(int sockfd, char *host_name, struct ifreq *ifre, int request, char *req_name);
static void set_hw_address(int sockfd, char ***argv, struct ifreq *ifre, int request, char *req_name);
static void set_ipv6_addr(int sockfd, struct ifreq *ifre, char *ipv6_addr, int request, char *req_name);
static void set_memstart(int sockfd, struct ifreq *ifre, char *start_addr, int request, char *req_name);
static void set_ioaddr(int sockfd, struct ifreq *ifre, char *baddr, int request, char *req_name);
static void set_irq(int sockfd, struct ifreq *ifre, char *irq_val, int request, char *req_name);
char *omit_whitespace(char *s)
{
while(*s == ' ' || (unsigned char)(*s - 9) <= (13 - 9)) s++;
return (char *) s;
}
char *safe_strncpy(char *dst, char *src, size_t size)
{
if(!size) return dst;
dst[--size] = '\0';
return strncpy(dst, src, size);
}
/*
* verify the host is local unix path.
* if so, set the swl input param accordingly.
*/
static int is_host_unix(char *host, sockaddr_with_len **swl)
{
if(strncmp(host, "local:", 6) == 0) {
struct sockaddr_un *sockun;
*swl = xzalloc(sizeof(struct sockaddr_with_len));
(*swl)->socklen = sizeof(struct sockaddr_un);
(*swl)->sock_u.sock.sa_family = AF_UNIX;
sockun = (struct sockaddr_un *)&(*swl)->sock_u.sock;
safe_strncpy(sockun->sun_path, host + 6, sizeof(sockun->sun_path));
return 1;
}
return 0;
}
/*
* validate the input param (host) for valid ipv6 ip and extract port number (if there).
*/
static void get_host_and_port(char **host, int *port)
{
char *ch_ptr;
char *org_host = *host;
if(*host[0] == '[') {
(*host)++;
ch_ptr = strchr(*host, ']');
if(!ch_ptr || (ch_ptr[1] != ':' && ch_ptr[1] != '\0'))
error_exit("bad address '%s'", org_host);
}
else {
ch_ptr = strrchr(*host, ':');
//There is more than one ':' like "::1"
if(ch_ptr && strchr(*host, ':') != ch_ptr)
ch_ptr = NULL;
}
if(ch_ptr) { //pointer to ":" or "]:"
int size = ch_ptr - (*host) + 1;
safe_strncpy(*host, *host, size);
if(*ch_ptr != ':') {
ch_ptr++; //skip ']'
//[nn] without port
if(!*ch_ptr) return;
}
ch_ptr++; //skip ':' to get the port number.
*port = get_strtou(ch_ptr, NULL, 10);
if(errno || (unsigned)*port > 65535)
error_exit("bad port spec '%s'", org_host);
}
}
/*
* used to extract the address info from the given host ip
* and update the swl param accordingly.
*/
static int get_socket_stream(char *host, sa_family_t af, sockaddr_with_len **swl)
{
struct addrinfo hints, *result, *rp;
int status;
memset(&hints, 0 , sizeof(struct addrinfo));
hints.ai_family = af;
hints.ai_socktype = SOCK_STREAM;
status = getaddrinfo(host, NULL, &hints, &result);
if (status) perror_exit("bad address '%s' : %s", host, gai_strerror(status));
for(rp = result; rp; rp = rp->ai_next) {
if(rp->ai_family == AF_INET || rp->ai_family == AF_INET6) {
*swl = xmalloc(sizeof(struct sockaddr_with_len));
(*swl)->socklen = rp->ai_addrlen;
memcpy(&((*swl)->sock_u.sock), rp->ai_addr, rp->ai_addrlen);
break;
}
}
freeaddrinfo(result);
return rp ? 0 : -1;
}
/*
* use to get the socket address with the given host ip.
*/
sockaddr_with_len *get_sockaddr(char *host, int port, sa_family_t af)
{
sockaddr_with_len *swl = NULL;
in_port_t port_num = htons(port);
if(is_host_unix(host, &swl) && swl) return swl;
//[IPV6_ip]:port_num
if(host[0] == '[' || strrchr(host, ':')) get_host_and_port((char **)&host, &port);
if (get_socket_stream(host, af, &swl)) return NULL;
if(swl->sock_u.sock.sa_family == AF_INET)
swl->sock_u.sock_in.sin_port = port_num;
else if(swl->sock_u.sock.sa_family == AF_INET6)
swl->sock_u.sock_in6.sin6_port = port_num;
return swl;
}
/*
* get the numeric hostname and service name, for a given socket address.
*/
char *address_to_name(struct sockaddr *sock)
{
//man page of getnameinfo.
char hbuf[NI_MAXHOST] = {0,}, sbuf[NI_MAXSERV] = {0,};
int status = 0;
if(sock->sa_family == AF_INET) {
socklen_t len = sizeof(struct sockaddr_in);
if((status = getnameinfo(sock, len, hbuf, sizeof(hbuf), sbuf, sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV)) == 0)
return xmsprintf("%s:%s", hbuf, sbuf);
else {
fprintf(stderr, "getnameinfo: %s\n", gai_strerror(status));
return NULL;
}
}
else if(sock->sa_family == AF_INET6) {
socklen_t len = sizeof(struct sockaddr_in6);
if((status = getnameinfo(sock, len, hbuf, sizeof(hbuf), sbuf, sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV)) == 0) {
//verification for resolved hostname.
if(strchr(hbuf, ':')) return xmsprintf("[%s]:%s", hbuf, sbuf);
else return xmsprintf("%s:%s", hbuf, sbuf);
}
else {
fprintf(stderr, "getnameinfo: %s\n", gai_strerror(status));
return NULL;
}
}
else if(sock->sa_family == AF_UNIX) {
struct sockaddr_un *sockun = (void*)sock;
return xmsprintf("local:%.*s", (int) sizeof(sockun->sun_path), sockun->sun_path);
}
else
return NULL;
}
/*
* used to converts string into int and validate the input str for invalid int value or out-of-range.
*/
unsigned get_strtou(char *str, char **endp, int base)
{
unsigned long uli;
char *endptr;
if(!isalnum(str[0])) {
errno = ERANGE;
return UINT_MAX;
}
errno = 0;
uli = strtoul(str, &endptr, base);
if(uli > UINT_MAX) {
errno = ERANGE;
return UINT_MAX;
}
if(endp) *endp = endptr;
if(endptr[0]) {
if(isalnum(endptr[0]) || errno) { //"123abc" or out-of-range
errno = ERANGE;
return UINT_MAX;
}
errno = EINVAL;
}
return uli;
}
IFACE_LIST *iface_list_head;
void ifconfig_main(void)
{
char **argv = toys.optargs;
if(*argv && (strcmp(*argv, "--help") == 0))
show_help();
//"ifconfig" / "ifconfig eth0"
if(!argv[0] || !argv[1]) { //one or no argument
toys.exitval = show_iface(*argv);
//free allocated memory.
clear_list();
return;
}
//set ifconfig params.
{
struct ifreq ifre;
int sockfd = 0;
//get interface name
memset(&ifre, 0, sizeof(struct ifreq));
strncpy(ifre.ifr_name, *argv, IFNAMSIZ);
ifre.ifr_name[IFNAMSIZ-1] = 0;
if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
perror_exit("socket");
while(*++argv != NULL) {
/* flags settings */
if (!strcmp(*argv, "up"))
set_flags(sockfd, &ifre, IFF_UP | IFF_RUNNING, 0);
else if (!strcmp(*argv, "down"))
set_flags(sockfd, &ifre, 0, IFF_UP);
else if (!strcmp(*argv, "arp"))
set_flags(sockfd, &ifre, 0, IFF_NOARP);
else if (!strcmp(*argv, "-arp"))
set_flags(sockfd, &ifre, IFF_NOARP, 0);
else if (!strcmp(*argv, "trailers"))
set_flags(sockfd, &ifre, 0, IFF_NOTRAILERS);
else if (!strcmp(*argv, "-trailers"))
set_flags(sockfd, &ifre, IFF_NOTRAILERS, 0);
else if (!strcmp(*argv, "promisc"))
set_flags(sockfd, &ifre, IFF_PROMISC, 0);
else if (!strcmp(*argv, "-promisc"))
set_flags(sockfd, &ifre, 0, IFF_PROMISC);
else if (!strcmp(*argv, "allmulti"))
set_flags(sockfd, &ifre, IFF_ALLMULTI, 0);
else if (!strcmp(*argv, "-allmulti"))
set_flags(sockfd, &ifre, 0, IFF_ALLMULTI);
else if (!strcmp(*argv, "multicast"))
set_flags(sockfd, &ifre, IFF_MULTICAST, 0);
else if (!strcmp(*argv, "-multicast"))
set_flags(sockfd, &ifre, 0, IFF_MULTICAST);
else if (!strcmp(*argv, "dynamic"))
set_flags(sockfd, &ifre, IFF_DYNAMIC, 0);
else if (!strcmp(*argv, "-dynamic"))
set_flags(sockfd, &ifre, 0, IFF_DYNAMIC);
else if (!strcmp(*argv, "-pointopoint"))
set_flags(sockfd, &ifre, 0, IFF_POINTOPOINT);
/*value setup */
else if (!strcmp(*argv, "pointopoint")) {
show_help();
set_address(sockfd, *argv, &ifre, SIOCSIFDSTADDR, "SIOCSIFDSTADDR");
set_flags(sockfd, &ifre, IFF_POINTOPOINT, 0);
} else if (!strcmp(*argv, "netmask")) {
show_help();
set_address(sockfd, *argv, &ifre, SIOCSIFNETMASK, "SIOCSIFNETMASK");
} else if (!strcmp(*argv, "-broadcast")) {
set_flags(sockfd, &ifre, 0, IFF_BROADCAST);
} else if (!strcmp(*argv, "broadcast")) {
show_help();
set_address(sockfd, *argv, &ifre, SIOCSIFBRDADDR, "SIOCSIFBRDADDR");
set_flags(sockfd, &ifre, IFF_BROADCAST, 0);
} else if (!strcmp(*argv, "dstaddr")) {
show_help();
set_address(sockfd, *argv, &ifre, SIOCSIFDSTADDR, "SIOCSIFDSTADDR");
} else if (!strcmp(*argv, "hw")) {
show_help();
set_hw_address(sockfd, &argv, &ifre, SIOCSIFHWADDR, "SIOCSIFHWADDR");
} else if (!strcmp(*argv, "mtu")) {
show_help();
set_mtu(sockfd, &ifre, *argv);
} else if (!strcmp(*argv, "metric")) {
show_help();
set_metric(sockfd, &ifre, *argv);
} else if (!strcmp(*argv, "txqueuelen")) {
show_help();
set_qlen(sockfd, &ifre, *argv);
} else if (!strcmp(*argv, "keepalive")) {
show_help();
set_data(sockfd, &ifre, *argv, SIOCSKEEPALIVE, "SIOCSKEEPALIVE");
}//end of keepalive
else if (!strcmp(*argv, "outfill")) {
show_help();
set_data(sockfd, &ifre, *argv, SIOCSOUTFILL, "SIOCSOUTFILL");
} else if (!strcmp(*argv, "add")) {
show_help();
set_ipv6_addr(sockfd, &ifre, *argv, SIOCSIFADDR, "SIOCSIFADDR");
} else if (!strcmp(*argv, "del")) {
show_help();
set_ipv6_addr(sockfd, &ifre, *argv, SIOCDIFADDR, "SIOCDIFADDR");
} else if (!strcmp(*argv, "mem_start")) {
show_help();
set_memstart(sockfd, &ifre, *argv, SIOCSIFMAP, "SIOCSIFMAP");
} else if (!strcmp(*argv, "io_addr")) {
show_help();
set_ioaddr(sockfd, &ifre, *argv, SIOCSIFMAP, "SIOCSIFMAP");
} else if (!strcmp(*argv, "irq")) {
show_help();
set_irq(sockfd, &ifre, *argv, SIOCSIFMAP, "SIOCSIFMAP");
} else {
if(isdigit(**argv) || !strcmp(*argv, "default")) {
char *iface_name = ifre.ifr_name;
short int is_colon = 0;
set_address(sockfd, *argv, &ifre, SIOCSIFADDR, "SIOCSIFADDR");
while(*iface_name) {
if(*iface_name == ':') {
is_colon = 1;
break;
}
iface_name++;
}
//if the interface name is not an alias; set the flag and continue.
if(!is_colon)
set_flags(sockfd, &ifre, IFF_UP | IFF_RUNNING, 0);
} else if (!strcmp(*argv, "inet") || !strcmp(*argv, "inet6"))
continue;
else {
errno = EINVAL;
toys.exithelp++;
error_exit("bad argument");
}
}
}
if(sockfd > 0) close(sockfd);
}
}
static void set_flags(int sockfd, struct ifreq *ifre, int set_flag, int reset_flag)
{
if(ioctl(sockfd, SIOCGIFFLAGS, ifre) < 0)
perror_exit("SIOCGIFFLAGS");
ifre->ifr_flags = (ifre->ifr_flags & (~reset_flag)) | set_flag;
if(ioctl(sockfd, SIOCSIFFLAGS, ifre) < 0)
perror_exit("SIOCSIFFLAGS");
return;
}
static void set_data(int sockfd, struct ifreq *ifre, char *kval, int request, char *req_name)
{
unsigned long val = strtoul(kval, NULL, 0);
char *ptr;
ptr = ((char *) ifre) + offsetof(struct ifreq, ifr_data);
(*(char * *)ptr) = (char *)val;
if(ioctl(sockfd, request, ifre) < 0) {
perror_exit((char *)req_name);
}
return;
}
static void set_mtu(int sockfd, struct ifreq *ifre, char *mtu)
{
ifre->ifr_mtu = strtoul(mtu, NULL, 0);
if(ioctl(sockfd, SIOCSIFMTU, ifre) < 0)
perror_exit("SIOCSIFMTU");
return;
}
static void set_metric(int sockfd, struct ifreq *ifre, char *metric)
{
ifre->ifr_metric = strtoul(metric, NULL, 0);
if(ioctl(sockfd, SIOCSIFMETRIC, ifre) < 0)
perror_exit("SIOCSIFMETRIC");
return;
}
static void set_qlen(int sockfd, struct ifreq *ifre, char *qlen)
{
ifre->ifr_qlen = strtoul(qlen, NULL, 0);
if(ioctl(sockfd, SIOCSIFTXQLEN, ifre) < 0)
perror_exit("SIOCSIFTXQLEN");
return;
}
static void set_ipv6_addr(int sockfd, struct ifreq *ifre, char *ipv6_addr, int request, char *req_name)
{
char *prefix;
int plen = 0;
sockaddr_with_len *swl = NULL;
prefix = strchr(ipv6_addr, '/');
if(prefix) {
plen = get_int_value(prefix + 1, 0, 128);
*prefix = '\0';
}
swl = get_sockaddr(ipv6_addr, 0, AF_INET6);
if(!swl) error_exit("error in resolving host name");
int sockfd6;
struct ifreq_inet6 ifre6;
memcpy((char *) &ifre6.ifrinte6_addr,
(char *) &(swl->sock_u.sock_in6.sin6_addr),
sizeof(struct in6_addr));
//Create a channel to the NET kernel.
if( (sockfd6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
perror_exit("AF_INET6 SOCK_DGRAM", 0);
if(ioctl(sockfd6, SIOGIFINDEX, ifre) < 0)
perror_exit("SIOGIFINDEX");
ifre6.ifrinet6_ifindex = ifre->ifr_ifindex;
ifre6.ifrinet6_prefixlen = plen;
if(ioctl(sockfd6, request, &ifre6) < 0)
perror_exit((char *)req_name);
if(swl != NULL) {
free(swl);
swl = NULL;
}
return;
}
static void set_address(int sockfd, char *host_name, struct ifreq *ifre, int request, char *req_name)
{
struct sockaddr_in sock_in;
sockaddr_with_len *swl = NULL;
sock_in.sin_family = AF_INET;
sock_in.sin_port = 0;
//Default 0.0.0.0
if(strcmp(host_name, "default") == 0)
sock_in.sin_addr.s_addr = INADDR_ANY;
else {
swl = get_sockaddr(host_name, 0, AF_INET);
if(!swl) error_exit("error in resolving host name");
sock_in.sin_addr = swl->sock_u.sock_in.sin_addr;
}
memcpy((char *)&ifre->ifr_addr, (char *) &sock_in, sizeof(struct sockaddr));
if(ioctl(sockfd, request, ifre) < 0)
perror_exit((char *)req_name);
if(swl != NULL) {
free(swl);
swl = NULL;
}
return;
}
static int hex_to_binary(char *hw_addr, struct sockaddr *sock, int count)
{
int i = 0, j = 0;
unsigned char nib_val;
unsigned char ch;
char *ptr = (char *) sock->sa_data;
if(count == ETH_ALEN)
sock->sa_family = ARPHRD_ETHER;
else if(count == INFINIBAND_ALEN)
sock->sa_family = ARPHRD_INFINIBAND;
else
return -1;
//e.g. hw_addr "62:2D:A6:9E:2D:BE"
for(; *hw_addr && (i < count); i++) {
if(*hw_addr == ':')
hw_addr++;
j = nib_val = 0;
for(;j < 2; j++) {
ch = *hw_addr;
//0-9 = 10 chars.
if(((unsigned char)(ch - '0')) < 10)
ch = (ch - '0');
//a-f = 6 chars.
else if(((unsigned char)((ch) - 'a')) < 6)
ch = (ch - ('a'-10));
//A-F = 6 chars.
else if(((unsigned char)((ch) - 'A')) < 6)
ch = (ch - ('A'-10));
else if(j && (ch == ':' || ch == 0))
break;
else
return -1;
hw_addr++;
nib_val <<= 4;
nib_val += ch;
}
*ptr++ = nib_val;
}
if(*hw_addr)
return -1;
return 0;
}
static void set_hw_address(int sockfd, char ***argv, struct ifreq *ifre, int request, char *req_name)
{
int hw_class = 0;
char *hw_addr;
struct sockaddr sock;
char *ptr;
char *hw_class_strings[] = {
"ether",
"infiniband",
NULL
};
if(strcmp(hw_class_strings[0], **argv) == 0)
hw_class = 1;
else if(strcmp(hw_class_strings[1], **argv) == 0)
hw_class = 2;
if(!hw_class || !(*argv += 1)) {
errno = EINVAL;
toys.exithelp++;
error_exit("bad hardware class");
}
memset(&sock, 0, sizeof(struct sockaddr));
hw_addr = **argv;
if(hw_class == 1) {
if(hex_to_binary(hw_addr, &sock, ETH_ALEN))
error_exit("invalid hw-addr %s", hw_addr);
}
else {
if(hex_to_binary(hw_addr, &sock, INFINIBAND_ALEN))
error_exit("invalid hw-addr %s", hw_addr);
}
ptr = (char *)&sock;
memcpy( ((char *) ifre) + offsetof(struct ifreq, ifr_hwaddr), ptr, sizeof(struct sockaddr));
if(ioctl(sockfd, request, ifre) < 0)
perror_exit((char *)req_name);
return;
}
static void set_memstart(int sockfd, struct ifreq *ifre, char *start_addr, int request, char *req_name)
{
unsigned long mem_start = strtoul(start_addr, NULL, 0);
if(ioctl(sockfd, SIOCGIFMAP, ifre) < 0)
perror_exit("SIOCGIFMAP");
ifre->ifr_map.mem_start = mem_start;
if(ioctl(sockfd, request, ifre) < 0)
perror_exit((char *)req_name);
return;
}
static void set_ioaddr(int sockfd, struct ifreq *ifre, char *baddr, int request, char *req_name)
{
unsigned short int base_addr = strtoul(baddr, NULL, 0);
if(ioctl(sockfd, SIOCGIFMAP, ifre) < 0)
perror_exit("SIOCGIFMAP");
ifre->ifr_map.base_addr = base_addr;
if(ioctl(sockfd, request, ifre) < 0)
perror_exit((char *)req_name);
return;
}
static void set_irq(int sockfd, struct ifreq *ifre, char *irq_val, int request, char *req_name)
{
unsigned short int irq = strtoul(irq_val, NULL, 0);
char *ptr;
struct ifmap *map;
if(ioctl(sockfd, SIOCGIFMAP, ifre) < 0) perror_exit("SIOCGIFMAP");
ptr = ((char *) ifre) + offsetof(struct ifreq, ifr_map);
map = (struct ifmap *)ptr;
map->irq = irq;
if(ioctl(sockfd, request, ifre) < 0) perror_exit(req_name);
return;
}
/* Display ifconfig info. */
static void get_proc_info(char *buff, IFACE_LIST *l_ptr, int version)
{
char *name;
memset(&l_ptr->dev_info, 0, sizeof(PROC_NET_DEV_INFO));
buff = omit_whitespace(buff);
name = strsep(&buff, ":");
if(!buff)
error_exit("error in getting the device name:");
if(strlen(name) < (IFNAMSIZ)) {
strncpy(l_ptr->dev_info.ifrname, name, IFNAMSIZ-1);
l_ptr->dev_info.ifrname[IFNAMSIZ-1] = '\0';
}
else {
l_ptr->dev_info.ifrname[0] = '\0';
}
sscanf(buff, field_format[version],
&l_ptr->dev_info.receive_bytes,
&l_ptr->dev_info.receive_packets,
&l_ptr->dev_info.receive_errors,
&l_ptr->dev_info.receive_drop,
&l_ptr->dev_info.receive_fifo,
&l_ptr->dev_info.receive_frame,
&l_ptr->dev_info.receive_compressed,
&l_ptr->dev_info.receive_multicast,
&l_ptr->dev_info.transmit_bytes,
&l_ptr->dev_info.transmit_packets,
&l_ptr->dev_info.transmit_errors,
&l_ptr->dev_info.transmit_drop,
&l_ptr->dev_info.transmit_fifo,
&l_ptr->dev_info.transmit_colls,
&l_ptr->dev_info.transmit_carrier,
&l_ptr->dev_info.transmit_compressed
);
if(version == 0)
l_ptr->dev_info.receive_bytes = l_ptr->dev_info.transmit_bytes = 0;
if(version == 1)
l_ptr->dev_info.receive_multicast = l_ptr->dev_info.receive_compressed = l_ptr->dev_info.transmit_compressed = 0;
return;
}
static void add_iface_to_list(IFACE_LIST *newnode)
{
IFACE_LIST *head_ref = iface_list_head;
if((head_ref == NULL) || strcmp(newnode->dev_info.ifrname, head_ref->dev_info.ifrname) < 0) {
newnode->next = head_ref;
head_ref = newnode;
} else {
IFACE_LIST *current = head_ref;
while(current->next != NULL && (strcmp(current->next->dev_info.ifrname, newnode->dev_info.ifrname)) < 0)
current = current->next;
newnode->next = current->next;
current->next = newnode;
}
iface_list_head = head_ref;
}
static int get_device_info(IFACE_LIST *l_ptr)
{
struct ifreq ifre;
char *ifrname = l_ptr->dev_info.ifrname;
int sokfd;
if ((sokfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) return sokfd;
strncpy(ifre.ifr_name, ifrname, IFNAMSIZ);
if(ioctl(sokfd, SIOCGIFFLAGS, &ifre) < 0) {
close(sokfd);
return NO_RANGE;
}
l_ptr->ifrflags = ifre.ifr_flags;
strncpy(ifre.ifr_name, ifrname, IFNAMSIZ);
if(ioctl(sokfd, SIOCGIFHWADDR, &ifre) >= 0)
memcpy(l_ptr->ifrhwaddr.sa_data, ifre.ifr_hwaddr.sa_data, sizeof(l_ptr->ifrhwaddr.sa_data));
l_ptr->hw_type = ifre.ifr_hwaddr.sa_family;
strncpy(ifre.ifr_name, ifrname, IFNAMSIZ);
if(ioctl(sokfd, SIOCGIFMETRIC, &ifre) >= 0)
l_ptr->ifrmetric = ifre.ifr_metric;
strncpy(ifre.ifr_name, ifrname, IFNAMSIZ);
if(ioctl(sokfd, SIOCGIFMTU, &ifre) >= 0)
l_ptr->ifrmtu = ifre.ifr_mtu;
#ifdef SIOCGIFMAP
strncpy(ifre.ifr_name, ifrname, IFNAMSIZ);
if(ioctl(sokfd, SIOCGIFMAP, &ifre) == 0)
l_ptr->ifrmap = ifre.ifr_map;
#endif
strncpy(ifre.ifr_name, ifrname, IFNAMSIZ);
l_ptr->txqueuelen = NO_RANGE;
if(ioctl(sokfd, SIOCGIFTXQLEN, &ifre) >= 0)
l_ptr->txqueuelen = ifre.ifr_qlen;
strncpy(ifre.ifr_name, ifrname, IFNAMSIZ);
ifre.ifr_addr.sa_family = AF_INET;
if(ioctl(sokfd, SIOCGIFADDR, &ifre) == 0) {
l_ptr->ifaddr = 1;
l_ptr->ifraddr = ifre.ifr_addr;
strncpy(ifre.ifr_name, ifrname, IFNAMSIZ);
if(ioctl(sokfd, SIOCGIFDSTADDR, &ifre) >= 0)
l_ptr->ifrdstaddr = ifre.ifr_dstaddr;
strncpy(ifre.ifr_name, ifrname, IFNAMSIZ);
if(ioctl(sokfd, SIOCGIFBRDADDR, &ifre) >= 0)
l_ptr->ifrbroadaddr = ifre.ifr_broadaddr;
strncpy(ifre.ifr_name, ifrname, IFNAMSIZ);
if(ioctl(sokfd, SIOCGIFNETMASK, &ifre) >= 0)
l_ptr->ifrnetmask = ifre.ifr_netmask;
}
close(sokfd);
return 0;
}
static void get_ifconfig_info(void)
{
IFACE_LIST *l_ptr;
int version_num = 0;
FILE *fp = fopen("/proc/net/dev", "r");
if (!fp) return;
fgets(toybuf, sizeof(toybuf), fp); //skip 1st header line.
fgets(toybuf, sizeof(toybuf), fp); //skip 2nd header line.
if(strstr(toybuf, "compressed")) version_num = 2;
else if(strstr(toybuf, "bytes")) version_num = 1;
else version_num = 0;
while(fgets(toybuf, sizeof(toybuf), fp)) {
l_ptr = xzalloc(sizeof(IFACE_LIST));
get_proc_info(toybuf, l_ptr, version_num);
add_iface_to_list(l_ptr);
l_ptr->non_virtual_iface = 1;
errno = 0;
if(get_device_info(l_ptr) < 0) perror_exit("%s", l_ptr->dev_info.ifrname);
}
fclose(fp);
}
static void get_hw_info(int hw_type, HW_INFO *hw_info)
{
memset(hw_info, 0, sizeof(HW_INFO));
switch(hw_type) {
case ARPHRD_LOOPBACK: //Loopback device.
strncpy(hw_info->hw_name, "loop", HW_NAME_LEN);
strncpy(hw_info->hw_title, "Local Loopback", HW_TITLE_LEN);
hw_info->hw_addrlen = 0;
break;
case ARPHRD_ETHER: //Ethernet
strncpy(hw_info->hw_name, "ether", HW_NAME_LEN);
strncpy(hw_info->hw_title, "Ethernet", HW_TITLE_LEN);
hw_info->hw_addrlen = ETH_ALEN;
break;
case ARPHRD_PPP: //ARPHRD_PPP
strncpy(hw_info->hw_name, "ppp", HW_NAME_LEN);
strncpy(hw_info->hw_title, "Point-to-Point Protocol", HW_TITLE_LEN);
hw_info->hw_addrlen = 0;
break;
case ARPHRD_INFINIBAND: //InfiniBand
strncpy(hw_info->hw_name, "infiniband", HW_NAME_LEN);
strncpy(hw_info->hw_title, "InfiniBand", HW_TITLE_LEN);
hw_info->hw_addrlen = 20;
break;
case ARPHRD_SIT: //sit0 device - IPv6-in-IPv4
strncpy(hw_info->hw_name, "sit", HW_NAME_LEN);
strncpy(hw_info->hw_title, "IPv6-in-IPv4", HW_TITLE_LEN);
hw_info->hw_addrlen = 0;
break;
case -1:
strncpy(hw_info->hw_name, "unspec", HW_NAME_LEN);
strncpy(hw_info->hw_title, "UNSPEC", HW_TITLE_LEN);
hw_info->hw_addrlen = 0;
break;
default:
break;
}
}
static void print_hw_addr(int hw_type, HW_INFO hw_info, IFACE_LIST *l_ptr)
{
unsigned char *address = (unsigned char *)l_ptr->ifrhwaddr.sa_data;
if(!address || !hw_info.hw_addrlen) return;
xprintf("HWaddr ");
if(hw_type == ARPHRD_ETHER) {
int i;
for (i=0; i<6; i++) xprintf(":%02X"+!i, address[i]);
}
return;
}
static char *get_ip_addr(struct sockaddr *skaddr)
{
struct sockaddr_in *sin = (struct sockaddr_in *)skaddr;
if(skaddr->sa_family == 0xFFFF || !skaddr->sa_family) return "[NOT SET]";
if(sin->sin_family != AF_INET) {
errno = EAFNOSUPPORT;
return NULL;
}
return inet_ntoa(sin->sin_addr);
}
static void print_ip_addr(IFACE_LIST *l_ptr)
{
char *af_name;
int af = l_ptr->ifraddr.sa_family;
if (af == AF_INET) af_name = "inet";
else if (af == AF_INET6) af_name = "inet6";
else if (af == AF_UNSPEC) af_name = "unspec";
xprintf("%10s%s addr:%s ", " ", af_name, get_ip_addr(&l_ptr->ifraddr));
if(l_ptr->ifrflags & IFF_POINTOPOINT)
xprintf(" P-t-P:%s ", get_ip_addr(&l_ptr->ifrdstaddr));
if(l_ptr->ifrflags & IFF_BROADCAST)
xprintf(" Bcast:%s ", get_ip_addr(&l_ptr->ifrbroadaddr));
xprintf(" Mask:%s\n", get_ip_addr(&l_ptr->ifrnetmask));
return;
}
static void print_iface_flags(IFACE_LIST *l_ptr)
{
if (l_ptr->ifrflags != 0) {
unsigned short mask = 1;
char **str = iface_flags_str;
for(; *str != NULL; str++) {
if(l_ptr->ifrflags & mask)
xprintf("%s ", *str);
mask = mask << 1;
}
} else xprintf("[NO FLAGS] ");
return;
}
static void print_media(IFACE_LIST *l_ptr)
{
#ifdef IFF_PORTSEL
if(l_ptr->ifrflags & IFF_PORTSEL) {
xprintf("Media:");
if(l_ptr->ifrmap.port == IF_PORT_UNKNOWN)
xprintf("%s", "unknown");
else if(l_ptr->ifrmap.port == IF_PORT_10BASE2)
xprintf("%s", "10base2");
else if(l_ptr->ifrmap.port == IF_PORT_10BASET)
xprintf("%s", "10baseT");
else if(l_ptr->ifrmap.port == IF_PORT_AUI)
xprintf("%s", "AUI");
else if(l_ptr->ifrmap.port == IF_PORT_100BASET)
xprintf("%s", "100baseT");
else if(l_ptr->ifrmap.port == IF_PORT_100BASETX)
xprintf("%s", "100baseTX");
else if(l_ptr->ifrmap.port == IF_PORT_100BASEFX)
xprintf("%s", "100baseFX");
if(l_ptr->ifrflags & IFF_AUTOMEDIA)
xprintf("(auto)");
}
#endif
return;
}
static void print_ip6_addr(IFACE_LIST *l_ptr)
{
char iface_name[IFNAMSIZ] = {0,};
char buf[BUFSIZ] = {0,};
int plen, scope;
FILE *fp = fopen("/proc/net/if_inet6", "r");
if(fp == NULL)
return;
while(fgets(buf, BUFSIZ, fp)) {
int nitems = 0;
char ipv6_addr[40] = {0,};
nitems = sscanf(buf, "%32s %*08x %02x %02x %*02x %15s\n",
ipv6_addr+7, &plen, &scope, iface_name);
if(nitems != 4) {
if((nitems < 0) && feof(fp))
break;
perror_exit("sscanf");
}
if(strcmp(l_ptr->dev_info.ifrname,iface_name) == 0) {
int i = 0;
struct sockaddr_in6 sock_in6;
int len = sizeof(ipv6_addr) / (sizeof ipv6_addr[0]);
char *ptr = ipv6_addr+7;
while((i < len-2) && (*ptr)) {
ipv6_addr[i++] = *ptr++;
//put ':' after 4th bit
if(!((i+1) % 5))
ipv6_addr[i++] = ':';
}
ipv6_addr[i+1] = '\0';
if(inet_pton(AF_INET6, ipv6_addr, (struct sockaddr *) &sock_in6.sin6_addr) > 0) {
sock_in6.sin6_family = AF_INET6;
memset(buf, 0, (sizeof(buf) /sizeof(buf[0])));
if(inet_ntop(AF_INET6, &sock_in6.sin6_addr, buf, BUFSIZ) > 0) {
xprintf("%10sinet6 addr: %s/%d", " ", buf, plen);
xprintf(" Scope:");
if(scope == IPV6_ADDR_ANY) xprintf(" Global");
else if(scope == IPV6_ADDR_LOOPBACK) xprintf(" Host");
else if(scope == IPV6_ADDR_LINKLOCAL) xprintf(" Link");
else if(scope == IPV6_ADDR_SITELOCAL) xprintf(" Site");
else if(scope == IPV6_ADDR_COMPATv4) xprintf(" Compat");
else xprintf("Unknown");
xprintf("\n");
}
}
}
}//end of while.
fclose(fp);
fp = NULL;
return;
}
static void display_ifconfig(IFACE_LIST *l_ptr)
{
HW_INFO hw_info;
int hw_type = l_ptr->hw_type;
get_hw_info(hw_type, &hw_info);
xprintf("%-9s Link encap:%s ", l_ptr->dev_info.ifrname, hw_info.hw_title);
print_hw_addr(hw_type, hw_info, l_ptr);
print_media(l_ptr);
xputc('\n');
if(l_ptr->ifaddr)
print_ip_addr(l_ptr); //print addr, p-p addr, broadcast addr and mask addr.
//for ipv6 to do.
print_ip6_addr(l_ptr);
xprintf("%10s", " ");
//print flags
print_iface_flags(l_ptr);
if(!l_ptr->ifrmetric) l_ptr->ifrmetric = 1;
xprintf(" MTU:%d Metric:%d", l_ptr->ifrmtu, l_ptr->ifrmetric);
xprintf("\n");
if(l_ptr->non_virtual_iface) {
xprintf("%10s", " ");
xprintf("RX packets:%llu errors:%lu dropped:%lu overruns:%lu frame:%lu\n",
l_ptr->dev_info.receive_packets, l_ptr->dev_info.receive_errors,
l_ptr->dev_info.receive_drop, l_ptr->dev_info.receive_fifo,
l_ptr->dev_info.receive_frame);
//Dummy types for non ARP hardware.
if((hw_type == ARPHRD_CSLIP) || (hw_type == ARPHRD_CSLIP6))
xprintf("%10scompressed:%lu\n", " ", l_ptr->dev_info.receive_compressed);
xprintf("%10sTX packets:%llu errors:%lu dropped:%lu overruns:%lu carrier:%lu\n", " ",
l_ptr->dev_info.transmit_packets, l_ptr->dev_info.transmit_errors,
l_ptr->dev_info.transmit_drop, l_ptr->dev_info.transmit_fifo,
l_ptr->dev_info.transmit_carrier);
xprintf("%10scollisions:%lu ", " ", l_ptr->dev_info.transmit_colls);
//Dummy types for non ARP hardware.
if((hw_type == ARPHRD_CSLIP) || (hw_type == ARPHRD_CSLIP6))
xprintf("compressed:%lu ", l_ptr->dev_info.transmit_compressed);
if(l_ptr->txqueuelen != NO_RANGE)
xprintf("txqueuelen:%d ", l_ptr->txqueuelen);
xprintf("\n%10s", " ");
xprintf("RX bytes:%llu ", l_ptr->dev_info.receive_bytes);
xprintf("TX bytes:%llu\n", l_ptr->dev_info.transmit_bytes);
}
if(l_ptr->ifrmap.irq || l_ptr->ifrmap.mem_start || l_ptr->ifrmap.dma || l_ptr->ifrmap.base_addr) {
xprintf("%10s", " ");
if(l_ptr->ifrmap.irq)
xprintf("Interrupt:%d ", l_ptr->ifrmap.irq);
if(l_ptr->ifrmap.base_addr >= IO_MAP_INDEX)
xprintf("Base address:0x%lx ", l_ptr->ifrmap.base_addr);
if(l_ptr->ifrmap.mem_start)
xprintf("Memory:%lx-%lx ", l_ptr->ifrmap.mem_start, l_ptr->ifrmap.mem_end);
if(l_ptr->ifrmap.dma)
xprintf("DMA chan:%x ", l_ptr->ifrmap.dma);
xputc('\n');
}
xputc('\n');
return;
}
static int readconf(void)
{
int num_of_req = 30;
struct ifconf ifcon;
struct ifreq *ifre;
int num, status = -1, sokfd;
ifcon.ifc_buf = NULL;
sokfd = socket(AF_INET, SOCK_DGRAM, 0);
if(sokfd < 0) {
perror_msg("error: no inet socket available");
return -1;
}
for (;;) {
ifcon.ifc_len = sizeof(struct ifreq) * num_of_req; //Size of buffer.
ifcon.ifc_buf = xrealloc(ifcon.ifc_buf, ifcon.ifc_len);
if((status = ioctl(sokfd, SIOCGIFCONF, &ifcon)) == -1) {
perror_msg("ioctl %#x failed", SIOCGIFCONF);
goto LOOP_BREAK;
}
//in case of overflow, increase number of requests and retry.
if (ifcon.ifc_len == (int)(sizeof(struct ifreq) * num_of_req)) {
num_of_req += 10;
continue;
}
break;
}//End of while loop
ifre = ifcon.ifc_req;
for(num = 0; num < ifcon.ifc_len && ifre; num += sizeof(struct ifreq), ifre++) {
//Escape duplicate values from the list.
IFACE_LIST *list_ptr;
int match_found = 0;
for(list_ptr = iface_list_head; list_ptr != NULL; list_ptr = list_ptr->next) {
//if interface already in the list then donot add it in the list.
if(!strcmp(ifre->ifr_name, list_ptr->dev_info.ifrname)) {
match_found = 1;
break;
}
}
if(!match_found) {
IFACE_LIST *l_ptr = xzalloc(sizeof(IFACE_LIST));
safe_strncpy(l_ptr->dev_info.ifrname, ifre->ifr_name, IFNAMSIZ);
add_iface_to_list(l_ptr);
errno = 0;
if(get_device_info(l_ptr) < 0)
perror_exit("%s", l_ptr->dev_info.ifrname);
}
}
LOOP_BREAK:
close(sokfd);
free(ifcon.ifc_buf);
return status;
}
static int show_iface(char *iface_name)
{
get_ifconfig_info();
if(iface_name) {
IFACE_LIST *l_ptr;
int is_dev_found = 0;
for(l_ptr = iface_list_head; l_ptr; l_ptr = l_ptr->next) {
if(strcmp(l_ptr->dev_info.ifrname, iface_name) == 0) {
is_dev_found = 1;
display_ifconfig(l_ptr);
break;
}
}
//if the given interface is not in the list.
if(!is_dev_found) {
IFACE_LIST *l_ptr = xzalloc(sizeof(IFACE_LIST));
safe_strncpy(l_ptr->dev_info.ifrname, iface_name, IFNAMSIZ);
errno = 0;
if(get_device_info(l_ptr) < 0) {
char *errmsg;
if(errno == ENODEV) errmsg = "Device not found";
else errmsg = strerror(errno);
error_msg("%s: error getting interface info: %s", iface_name, errmsg);
free(l_ptr);
return 1;
}
else display_ifconfig(l_ptr);
free(l_ptr);
}
} else {
IFACE_LIST *l_ptr;
if(readconf() < 0) return 1;
for(l_ptr = iface_list_head; l_ptr; l_ptr = l_ptr->next) {
if((l_ptr->ifrflags & IFF_UP) || (toys.optflags & FLAG_a))
display_ifconfig(l_ptr);
}
}
return 0;
}
static void clear_list(void)
{
IFACE_LIST *temp_ptr;
while(iface_list_head != NULL) {
temp_ptr = iface_list_head->next;
free(iface_list_head);
iface_list_head = temp_ptr;
}
return;
}
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