/* ip.c - Show / manipulate routing, devices, policy routing and tunnels.
*
* Copyright 2014 Sameer Prakash Pradhan <sameer.p.pradhan@gmail.com>
* Copyright 2014 Ranjan Kumar <ranjankumar.bth@gmail.com>
* Copyright 2014 Rajni Kant <rajnikant12345@gmail.com>
* Copyright 2014 Bilal Qureshi <bilal.jmi@gmail.com>
*
* No Standard.
*
USE_IP(NEWTOY(ip, NULL, TOYFLAG_SBIN))
USE_IP(OLDTOY(ipaddr, ip, TOYFLAG_SBIN))
USE_IP(OLDTOY(iplink, ip, TOYFLAG_SBIN))
USE_IP(OLDTOY(iproute, ip, TOYFLAG_SBIN))
USE_IP(OLDTOY(iprule, ip, TOYFLAG_SBIN))
USE_IP(OLDTOY(iptunnel, ip, TOYFLAG_SBIN))
config IP
bool "ip"
default n
help
usage: ip [ OPTIONS ] OBJECT { COMMAND }
Show / manipulate routing, devices, policy routing and tunnels.
where OBJECT := {address | link | route | rule | tunnel}
OPTIONS := { -f[amily] { inet | inet6 | link } | -o[neline] }
*/
#define FOR_ip
#include "toys.h"
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/if_ether.h>
#include <linux/if_addr.h>
#include <net/if_arp.h>
#include <ifaddrs.h>
#include <fnmatch.h>
#include <netinet/ip.h>
#include <linux/if_tunnel.h>
GLOBALS(
char stats, singleline, flush, *filter_dev, gbuf[8192];
int sockfd, connected, from_ok, route_cmd;
int8_t addressfamily, is_addr;
)
struct arglist {
char *name;
int idx;
};
static struct
{
int ifindex, scope, scopemask, up, to;
char *label, *addr;
} addrinfo;
struct linkdata {
struct linkdata *next, *prev;
int flags, iface_idx, mtu, txqueuelen, parent,iface_type;
char qdiscpline[IFNAMSIZ+1], state[IFNAMSIZ+1], type[IFNAMSIZ+1],
iface[IFNAMSIZ+1], laddr[64], bcast[64];
struct rtnl_link_stats rt_stat;
}*linfo;
typedef int (*cmdobj)(char **argv);
#define MESG_LEN 8192
// For "/etc/iproute2/RPDB_tables"
enum {
RPDB_rtdsfield = 1,
RPDB_rtprotos = 2,
RPDB_rtrealms = 3,
RPDB_rtscopes = 4,
RPDB_rttables = 5
};
#define RPDB_ENTRIES 256
static int8_t rttable_init;
static int8_t rtprotos_init;
static int8_t rtdsfield_init;
static int8_t rtscope_init;
static int8_t rtrealms_init;
static struct arglist *rt_dsfield[RPDB_ENTRIES];
static struct arglist *rt_protos[RPDB_ENTRIES];
static struct arglist *rt_tables[RPDB_ENTRIES];
static struct arglist *rt_realms[RPDB_ENTRIES];
static struct arglist *rt_scope[RPDB_ENTRIES];
static struct arglist rtmtypes[] = { {"none", RTN_UNSPEC},
{"unicast", RTN_UNICAST}, {"local", RTN_LOCAL},
{"broadcast", RTN_BROADCAST}, {"anycast", RTN_ANYCAST},
{"multicast", RTN_MULTICAST}, {"blackhole", RTN_BLACKHOLE},
{"unreachable", RTN_UNREACHABLE}, {"prohibit", RTN_PROHIBIT},
{"throw", RTN_THROW}, {"nat", RTN_NAT},
{"xresolve", RTN_XRESOLVE}, {NULL, -1}
};
static int filter_nlmesg(int (*fun)(struct nlmsghdr *mhdr, char **), char **);
static int ipaddr_print(struct linkdata *, int flg);
// ===========================================================================
// Common Code for IP Options (like: addr, link, route etc.)
// ===========================================================================
static int substring_to_idx(char *str, struct arglist *list)
{
struct arglist *alist;
int len;
if (!str) return -1;
len = strlen(str);
for (alist = list; alist->name; alist++)
if (!memcmp(str, alist->name, len)) return alist->idx;
return -1;
}
static int string_to_idx(char *str, struct arglist *list)
{
struct arglist *alist;
if (!str) return -1;
for (alist = list; alist->name; alist++)
if (!strcmp(str, alist->name)) return alist->idx;
return -1;
}
static char *idx_to_string(int idx, struct arglist *list)
{
struct arglist *alist;
if (idx < 0) return NULL;
for (alist = list; alist->name; alist++)
if (idx == alist->idx) return alist->name;
return NULL;
}
static void send_nlmesg(int type, int flags, int family,
void *buf, int blen)
{
struct {
struct nlmsghdr nlh;
struct rtgenmsg g;
} req;
if (!buf) {
memset(&req, 0, sizeof(req));
req.nlh.nlmsg_len = sizeof(req);
req.nlh.nlmsg_type = type;
req.nlh.nlmsg_flags = flags;
req.g.rtgen_family = family;
buf = &req;
blen = sizeof(req);
}
if (send(TT.sockfd , (void*)buf, blen, 0) < 0)
perror_exit("Unable to send data on socket.");
}
// Parse /etc/iproute2/RPDB_tables and prepare list.
static void parseRPDB(char *fname, struct arglist **list, int32_t size)
{
char *line;
int fd = open(fname, O_RDONLY);
if (fd < 0) return;
for (; (line = get_line(fd)); free(line)) {
char *ptr = line;
int32_t idx;
while (*ptr == ' ' || *ptr == '\t') ptr++;
if (*ptr == 0 || *ptr == '#' || *ptr == '\n') continue;
if ((sscanf(ptr, "0x%x %s\n", &idx, toybuf) != 2) &&
(sscanf(ptr, "0x%x %s #", &idx, toybuf) != 2) &&
(sscanf(ptr, "%d %s\n", &idx, toybuf) != 2) &&
(sscanf(ptr, "%d %s #", &idx, toybuf) != 2)) {
error_msg("Corrupted '%s' file", fname);
xclose(fd);
free(line);
return;
}
if (idx >= 0 && idx < size) {
int index = idx & (size-1);
if (list[index]) free(list[index]->name);
else list[index] = xzalloc(sizeof(struct arglist));
list[index]->idx = idx;
list[index]->name = xstrdup(toybuf);
}
}
xclose(fd);
}
static void free_alist(struct arglist **list)
{
int i;
for (i = 0;i<RPDB_ENTRIES;i++) {
if (list[i]) {
free(list[i]->name);
free(list[i]);
}
}
}
static void init_arglist(struct arglist **list,int value, char* name)
{
if (!list[value]) list[value] = xzalloc(sizeof(struct arglist));
list[value]->idx = value;
list[value]->name = xstrdup(name);
}
static struct arglist **getlist(u_int8_t whichDB)
{
struct arglist **alist;
switch (whichDB) {
case RPDB_rtdsfield:
alist = rt_dsfield;
if (!rtdsfield_init) {
rtdsfield_init = 1;
parseRPDB("/etc/iproute2/rt_dsfield", alist, ARRAY_LEN(rt_dsfield));
}
break;
case RPDB_rtprotos:
alist = rt_protos;
if (!rttable_init) {
rtprotos_init = 1;
init_arglist(rt_protos,0,"none");
init_arglist(rt_protos,1,"redirect");
init_arglist(rt_protos,2,"kernel");
init_arglist(rt_protos,3,"boot");
init_arglist(rt_protos,4,"static");
init_arglist(rt_protos,8,"gated");
init_arglist(rt_protos,9,"ra");
init_arglist(rt_protos,10,"mrt");
init_arglist(rt_protos,11,"zebra");
init_arglist(rt_protos,12,"bird");
parseRPDB("/etc/iproute2/rt_protos", alist, ARRAY_LEN(rt_protos));
}
break;
case RPDB_rtrealms:
alist = rt_realms;
if (!rtrealms_init) {
rtrealms_init = 1;
init_arglist(rt_realms,0,"unspec");
parseRPDB("/etc/iproute2/rt_realms", alist, ARRAY_LEN(rt_realms));
}
break;
case RPDB_rtscopes:
alist = rt_scope;
if (!rtscope_init) {
rtscope_init = 1;
init_arglist(rt_scope,0,"global");
init_arglist(rt_scope,200,"site");
init_arglist(rt_scope,253,"link");
init_arglist(rt_scope,254,"host");
init_arglist(rt_scope,255,"nowhere");
parseRPDB("/etc/iproute2/rt_scopes", alist, ARRAY_LEN(rt_scope));
}
break;
case RPDB_rttables:
alist = rt_tables;
if (!rttable_init) {
rttable_init = 1;
init_arglist(rt_tables,RT_TABLE_DEFAULT,"default");
init_arglist(rt_tables,RT_TABLE_MAIN,"main");
init_arglist(rt_tables,RT_TABLE_LOCAL,"local");
parseRPDB("/etc/iproute2/rt_tables", alist, ARRAY_LEN(rt_tables));
}
break;
default:
error_exit("wrong database");
break; // Unreachable code.
}
return alist;
}
/*
* Parse RPBD tables (if not parsed already).
* return RPDB table name as per idx.
*/
static char *namefromRPDB(int idx, u_int8_t whichDB)
{
struct arglist **alist;
if (idx < 0 || idx >= RPDB_ENTRIES) {
snprintf(toybuf, RPDB_ENTRIES, "%u", idx);
return toybuf;
}
alist = getlist(whichDB);
if (alist[idx] && alist[idx]->name) return alist[idx]->name;
if (whichDB == RPDB_rtdsfield) snprintf(toybuf, RPDB_ENTRIES, "0x%02x", idx);
else snprintf(toybuf, RPDB_ENTRIES, "%u", idx);
return toybuf;
}
static int idxfromRPDB(char *name, u_int8_t whichDB)
{
struct arglist **alist;
long i = 0;
char *ptr = NULL;
for (alist = getlist(whichDB); i < RPDB_ENTRIES; i++) {
if (!alist[i] || !alist[i]->name) continue;
if (!strcmp(alist[i]->name, name)) return i;
}
i = strtol(name, &ptr, 0);
if (errno || (ptr && *ptr) || i < 0 || i > 255)
return -1;
return i;
}
static char *rtmtype_idx2str(u_int8_t idx)
{
char *name = idx_to_string(idx, rtmtypes);
if (!name) snprintf(toybuf, RPDB_ENTRIES, "%u", idx);
else snprintf(toybuf, sizeof(toybuf), "%s", name);
return toybuf;
}
static int rtmtype_str2idx(char *name)
{
int idx = string_to_idx(name, rtmtypes);
if (idx < 0) return atolx_range(name, 0, 255);
return idx;
}
/*
* Used to get the prefix value in binary form.
* For IPv4: non-standard parsing used; as 10.10 will be treated as 10.10.0.0
* unlike inet_aton which is 10.0.0.10
*/
static int get_prefix(uint32_t *addr, uint8_t *af, char *name, int family)
{
if (family == AF_PACKET) error_exit("'%s' may be inet prefix", name);
if (!memcmp(name, "default", strlen(name))
|| !memcmp(name, "all", strlen(name))
|| !memcmp(name, "any", strlen(name))) {
*af = family;
return 0;
}
if (strchr(name, ':')) {
*af = AF_INET6;
if (family != AF_UNSPEC && family != AF_INET6) return 1;
if (inet_pton(AF_INET6, name, (void *)addr) != 1)
return 1;
} else { // for IPv4.
char *ptr = name;
uint8_t count = 0;
*af = AF_INET;
if (family != AF_UNSPEC && family != AF_INET) return 1;
while (*ptr) {
int val, len = 0;
if (*ptr == '.') ptr++;
sscanf(ptr, "%d%n", &val, &len);
if (!len || len > 3 || val < 0 || val > 255 || count > 3) return 1;
ptr += len;
((uint8_t*)addr)[count++] = val;
}
}
return 0;
}
/*
* Used to calculate netmask, which can be in the form of
* either 255.255.255.0 or 24 or default or any or all strings.
*/
static int get_nmask_prefix(uint32_t *netmask, uint8_t af,
char *name, uint8_t family)
{
char *ptr;
uint32_t naddr[4] = {0,};
uint64_t plen;
uint8_t naf = AF_UNSPEC;
*netmask = (af == AF_INET6) ? 128 : 32; // set default netmask
plen = strtoul(name, &ptr, 0);
if (!ptr || ptr == name || *ptr || !plen || plen > *netmask) {
if (get_prefix(naddr, &naf, name, family)) return -1;
if (naf == AF_INET) {
uint32_t mask = htonl(*naddr), host = ~mask;
if (host & (host + 1)) return -1;
for (plen = 0; mask; mask <<= 1) ++plen;
if (plen > 32) return -1;
}
}
*netmask = plen;
return 0;
}
/*
* Parse prefix, which will be in form of
* either default or default/default or default/24 or default/255.255.255.0
* or 10.20.30.40 or 10.20.30.40/default or 10.20.30.40/24
* or 10.20.30.40/255.255.255.0
*/
static void parse_prefix(uint32_t *addr, uint32_t *netmask, uint8_t *len,
char *name, int family)
{
uint8_t af = AF_UNSPEC;
char *slash = strchr(name, '/');
if (slash) *slash = 0;
if (get_prefix(addr, &af, name, family)) error_exit("Invalid prefix");
if (slash) { // grab netmask.
if (get_nmask_prefix(netmask, af, slash+1, family))
error_exit("Invalid prefix");
*slash ='/';
}
else if (af == AF_INET && *addr) *netmask = 32;
else if (af == AF_INET6 && (*addr || *(addr+3))) *netmask = 128;
if (!*addr && !slash && !af) *len = 0;
else *len = (af == AF_INET6) ? 16 : 4;
}
static void add_string_to_rtattr(struct nlmsghdr *n, int maxlen,
int type, void *data, int alen)
{
int len = RTA_LENGTH(alen);
struct rtattr *rta;
if ((int)(NLMSG_ALIGN(n->nlmsg_len) + len) > maxlen) return;
rta = (struct rtattr*)(((char*)n) + NLMSG_ALIGN(n->nlmsg_len));
rta->rta_type = type;
rta->rta_len = len;
memcpy(RTA_DATA(rta), data, alen);
n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + len;
}
// ===========================================================================
// Code for ip link.
// ===========================================================================
#ifndef NLMSG_TAIL
#define NLMSG_TAIL(nmsg) \
((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
#endif
static uint32_t get_ifaceindex(char *name, int ext)
{
struct if_nameindex *if_ni, *i;
int index = -1;
if_ni = if_nameindex();
if (!if_ni) perror_exit("if_nameindex");
for (i = if_ni; i->if_index && i->if_name; i++)
if (!strcmp(name, i->if_name)) {
index = i->if_index;
break;
}
if_freenameindex(if_ni);
if (index == -1 && ext) perror_exit("can't find device '%s'", name);
return index;
}
static void fill_hwaddr(char *arg, int len, unsigned char *address)
{
int count = 0, val, length;
while (count < len) {
val = length = 0;
if (!arg) error_exit("bad hw-addr '%s'", "");
if (*arg == ':') arg++, count++;
sscanf(arg, "%2x%n", &val, &length);
if (!length || length > 2)
error_exit("bad hw-addr '%s'", arg);
arg += length;
count += length;
*address++ = val;
}
}
// Multimach = 1, single match = 0
static char *get_flag_string(struct arglist *aflags, int flags, int ismulti)
{
struct arglist *p = aflags;
char *out = NULL, *tmp = NULL;
for (; p->name; p++) {
int test = (ismulti ? p->idx & flags : 0) || p->idx == flags;
if (test) { // flags can be zero
tmp = out ? xmprintf("%s,%s", out, p->name) : xmprintf("%s", p->name);
if (out) free(out);
out = tmp;
}
}
return out;
}
static void vlan_parse_opt(char **argv, struct nlmsghdr *n, unsigned int size)
{
struct arglist vlan_optlist[] = {{"id", 0}, {"protocol", 1},
{"reorder_hdr", 2}, {"gvrp", 3}, {NULL,-1}};
struct arglist vlan_protolist[] = {{"802.1q", 0}, {"802.1ad", 1}, {NULL,-1}};
struct arglist on_off[] = { {"on", 0}, {"off", 1}, {NULL,-1}};
int idx;
struct ifla_vlan_flags flags;
memset(&flags, 0, sizeof(flags));
for (; *argv; argv++) {
int param, proto;
if ((idx = substring_to_idx(*argv++, vlan_optlist)) == -1) help_exit(0);
switch (idx) {
case 0: // ARG_id
if (!*argv) help_exit(0);
param = atolx(*argv);
add_string_to_rtattr(n, size, IFLA_VLAN_ID, ¶m, sizeof(param));
break;
case 1: // ARG_protocol
if (!*argv) error_exit("Invalid vlan id.");
if ((idx = substring_to_idx(*argv, vlan_protolist)) == -1) help_exit(0);
if (!idx) proto = ETH_P_8021Q; // PROTO_8021Q - 0
else if (idx == 1) proto = 0x88A8; // ETH Protocol - 8021AD
// IFLA VLAN PROTOCOL - 5
add_string_to_rtattr(n, size, 5, &proto, sizeof(proto));
break;
case 2: // ARG_reorder_hdr
case 3: // ARG_gvrp
if ((param = substring_to_idx(*argv, on_off)) == -1) help_exit(0);
flags.mask |= (idx -1); // VLAN FLAG REORDER Header
flags.flags &= ~(idx -1); // VLAN FLAG REORDER Header
if (!param) flags.flags |= (idx -1); // VLAN FLAG REORDER Header
break;
}
}
if (flags.mask)
add_string_to_rtattr(n, size, IFLA_VLAN_FLAGS, &flags, sizeof(flags));
}
static int linkupdate(char **argv)
{
struct {
struct nlmsghdr mhdr;
struct ifinfomsg info;
char buf[1024];
} request;
char *name, *dev, *type, *link, *addr;
struct rtattr *attr = NULL;
int len = 0, add = (*argv[-1] == 'a') ? 1 : 0;
name = dev = type = link = addr = NULL;
for (; *argv; argv++) {
struct arglist objectlist[] = { {"type", 0}, {"name", 1}, {"link", 2},
{"address", 3}, {NULL,-1}};
uint8_t idx = substring_to_idx(*argv, objectlist);
if (!idx) {
type = *++argv;
break;
}
else if (idx == 1) dev = name = *++argv;
else if (idx == 2) link = *++argv;
else if (idx == 3) addr = *++argv;
else if (!dev) name = dev = *argv;
}
if (!name && !add)
error_exit("Not enough information: \"dev\" argument is required.\n");
else if (!type && add)
error_exit("Not enough information: \"type\" argument is required.\n");
memset(&request, 0, sizeof(request));
request.mhdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
request.mhdr.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK;
if (add) {
request.mhdr.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL;
request.mhdr.nlmsg_type = RTM_NEWLINK;
} else {
request.mhdr.nlmsg_type = RTM_DELLINK;
request.info.ifi_index = get_ifaceindex(name, 1);
}
request.info.ifi_family = AF_UNSPEC;
attr = NLMSG_TAIL(&request.mhdr);
if (type) {
add_string_to_rtattr(&request.mhdr, sizeof(request),
IFLA_LINKINFO, NULL, 0);
add_string_to_rtattr(&request.mhdr, sizeof(request),
IFLA_INFO_KIND, type, strlen(type));
if (!strcmp(type, "vlan")) {
struct rtattr *data = NLMSG_TAIL(&request.mhdr);
add_string_to_rtattr(&request.mhdr, sizeof(request),
IFLA_INFO_DATA, NULL, 0);
vlan_parse_opt(++argv, &request.mhdr, sizeof(request));
data->rta_len = (void *)NLMSG_TAIL(&request.mhdr) - (void *)data;
}
attr->rta_len = (void *)NLMSG_TAIL(&request.mhdr) - (void *)attr;
}
if (link) {
uint32_t idx = get_ifaceindex(link, 1);
add_string_to_rtattr(&request.mhdr, sizeof(request),
IFLA_LINK, &idx, sizeof(uint32_t));
}
if (addr) {
char abuf[IF_NAMESIZE] = {0,};
fill_hwaddr(addr, IF_NAMESIZE, (unsigned char *)abuf);
add_string_to_rtattr(&request.mhdr, sizeof(request),
IFLA_ADDRESS, abuf, strlen(abuf));
}
if (!name) {
snprintf(toybuf, IFNAMSIZ, "%s%d", type, 0);
for (len = 1; ; len++) {
if (!get_ifaceindex(toybuf, 0)) break;
snprintf(toybuf, IFNAMSIZ, "%s%d", type, len);
}
name = toybuf;
}
len = strlen(name) + 1;
if (len < 2 || len > IFNAMSIZ) error_exit("Invalid device name.");
add_string_to_rtattr(&request.mhdr, sizeof(request), IFLA_IFNAME, name, len);
send_nlmesg(0, 0, 0, (void *)&request, request.mhdr.nlmsg_len);
return (filter_nlmesg(NULL,NULL));
}
static int link_set(char **argv)
{
struct arglist cmd_objectlist[] = {{"up", 0}, {"down", 1}, {"arp", 2},
{"multicast", 3}, {"dynamic", 4}, {"name", 5}, {"txqueuelen", 6},
{"mtu", 7},{"address", 8}, {"broadcast", 9}, {NULL,-1}};
int case_flags[] = {IFF_NOARP,IFF_MULTICAST,IFF_DYNAMIC};
struct ifreq req;
int idx, flags = 0, masks = 0xffff, fd;
memset(&req, 0, sizeof(req));
if (!*argv) error_exit("\"dev\" missing");
xstrncpy(req.ifr_name, *argv, IF_NAMESIZE);
fd = xsocket(AF_INET, SOCK_DGRAM, 0);
xioctl(fd, SIOCGIFINDEX, &req);
for (++argv; *argv;) {
if ((idx = substring_to_idx(*argv++, cmd_objectlist)) == -1) help_exit(0);
switch(idx) {
case 0:
flags |= IFF_UP; break;
case 1:
masks &= ~IFF_UP; break;
case 2:
case 3:
case 4:
if (!*argv) help_exit(0);
else if (!strcmp(*argv, "on")) {
if (idx == 2) {
masks &= ~case_flags[idx-2];
flags &= ~case_flags[idx-2];
} else flags |= case_flags[idx-2];
} else if (!strcmp(*argv,"off")) {
if (idx == 2) {
masks |= case_flags[idx-2];
flags |= case_flags[idx-2];
} else masks &= ~case_flags[idx-2];
} else help_exit(0);
++argv;
break;
case 5:
xstrncpy(req.ifr_ifru.ifru_newname, *argv, IF_NAMESIZE);
xioctl(fd, SIOCSIFNAME, &req);
xstrncpy(req.ifr_name, *argv++, IF_NAMESIZE);
xioctl(fd, SIOCGIFINDEX, &req);
break;
case 6:
req.ifr_ifru.ifru_ivalue = atolx(*argv++);
xioctl(fd, SIOCSIFTXQLEN, &req);
break;
case 7:
req.ifr_ifru.ifru_mtu = atolx(*argv++);
xioctl(fd, SIOCSIFMTU, &req);
break;
case 8:
xioctl(fd, SIOCGIFHWADDR, &req);
fill_hwaddr(*argv++, IF_NAMESIZE,
(unsigned char *)(req.ifr_hwaddr.sa_data));
xioctl(fd, SIOCSIFHWADDR, &req);
break;
case 9:
xioctl(fd, SIOCGIFHWADDR, &req);
fill_hwaddr(*argv++, IF_NAMESIZE,
(unsigned char *)(req.ifr_hwaddr.sa_data));
xioctl(fd, SIOCSIFHWBROADCAST, &req);
break;
}
}
xioctl(fd, SIOCGIFFLAGS, &req);
req.ifr_ifru.ifru_flags |= flags;
req.ifr_ifru.ifru_flags &= masks;
xioctl(fd, SIOCSIFFLAGS, &req);
xclose(fd);
return 0;
}
static void print_stats(struct rtnl_link_stats *rtstat)
{
char *line_feed = (!TT.singleline ? "\n " : " ");
if (TT.stats > 0) {
xprintf(" RX: bytes packets errors "
"dropped overrun mcast%s%-10u %-8u %-7u %-8u %-8u %-8u\n",
line_feed, rtstat->rx_bytes, rtstat->rx_packets, rtstat->rx_errors,
rtstat->rx_dropped, rtstat->rx_over_errors, rtstat->multicast);
if (TT.stats > 1) {
xprintf(" RX: errors length crc "
"frame fifo missed%s%-10u %-8u %-7u %-8u %-8u %-8u\n",
line_feed, rtstat->rx_errors, rtstat->rx_length_errors,
rtstat->rx_crc_errors, rtstat->rx_frame_errors,
rtstat->rx_fifo_errors, rtstat->rx_missed_errors);
}
xprintf(" TX: bytes packets errors "
"dropped carrier collsns%s%-10u %-8u %-7u %-8u %-8u %-8u\n",
line_feed, rtstat->tx_bytes, rtstat->tx_packets, rtstat->tx_errors,
rtstat->tx_dropped, rtstat->tx_carrier_errors, rtstat->collisions);
if (TT.stats > 1) {
xprintf(" TX: errors aborted fifo window "
"heartbeat%s%-10u %-8u %-7u %-8u %-8u\n",
line_feed, rtstat->tx_errors, rtstat->tx_aborted_errors,
rtstat->tx_fifo_errors, rtstat->tx_window_errors,
rtstat->tx_heartbeat_errors);
}
}
}
static int print_link_output(struct linkdata *link)
{
char *line_feed = " ", *flags,*peer = "brd";
struct arglist iface_flags[] = {{"",0},{"UP", IFF_UP},
{"BROADCAST", IFF_BROADCAST}, {"DEBUG", IFF_DEBUG},
{"LOOPBACK", IFF_LOOPBACK}, {"POINTOPOINT", IFF_POINTOPOINT},
{"NOTRAILERS", IFF_NOTRAILERS}, {"RUNNING", IFF_RUNNING},
{"NOARP", IFF_NOARP}, {"PROMISC",IFF_PROMISC},
{"ALLMULTI", IFF_ALLMULTI}, {"MASTER", IFF_MASTER}, {"SLAVE", IFF_SLAVE},
{"MULTICAST", IFF_MULTICAST}, {"PORTSEL", IFF_PORTSEL},
{"AUTOMEDIA", IFF_AUTOMEDIA}, {"DYNAMIC", IFF_DYNAMIC}, {NULL,-1}};
if (link->parent != -1) {
int fd = 0;
struct ifreq req;
memset(&req, 0, sizeof(req));
if_indextoname( link->parent,req.ifr_ifrn.ifrn_name);
fd = xsocket(AF_INET, SOCK_DGRAM, 0);
if (ioctl(fd, SIOCGIFTXQLEN, &req)) perror("");
else link->txqueuelen = req.ifr_ifru.ifru_ivalue;
xclose(fd);
}
if (TT.is_addr && addrinfo.label && fnmatch(addrinfo.label, link->iface, 0))
return 0;
if (!(flags = get_flag_string(iface_flags, link->flags, 1)))
error_exit("Invalid data.");
if (!TT.singleline) line_feed="\n ";
if (link->parent != -1) {
char iface[IF_NAMESIZE];
if (!if_indextoname(link->parent, iface)) perror_exit(NULL);
sprintf(toybuf,"%s@%s", link->iface, iface);
}
if (link->flags & IFF_POINTOPOINT) peer = "peer";
if (TT.is_addr && TT.singleline && TT.addressfamily)
xprintf("%d: %s", link->iface_idx,
((link->parent == -1) ? link->iface : toybuf));
else xprintf("%d: %s: <%s> mtu %d qdisc %s state %s qlen %d",
link->iface_idx, ((link->parent == -1) ? link->iface : toybuf), flags,
link->mtu, link->qdiscpline, link->state, link->txqueuelen);
if (!TT.addressfamily || TT.addressfamily == AF_PACKET)
xprintf("%slink/%s %s %s %s",
line_feed, link->type, link->laddr, peer ,link->bcast);
xputc('\n');
//user can specify stats flag two times
//one for stats and other for erros e.g. -s and -s -s
print_stats(&link->rt_stat);
free(flags);
return 0;
}
static void fill_address(void *p, char *ip)
{
unsigned char *ptr = (unsigned char*)p;
snprintf(ip, 64, " %02x:%02x:%02x:%02x:%02x:%02x",
ptr[0], ptr[1], ptr[2], ptr[3], ptr[4], ptr[5]);
}
static int get_link_info(struct nlmsghdr* h,struct linkdata* link,char **argv)
{
struct ifinfomsg *iface = NLMSG_DATA(h);
struct rtattr *attr = IFLA_RTA(iface);
int len = h->nlmsg_len - NLMSG_LENGTH(sizeof(*iface));
struct arglist hwtypes[]={{"generic",0},{"ether",ARPHRD_ETHER},
{"loopback", ARPHRD_LOOPBACK},{"sit",ARPHRD_SIT},
#ifdef ARPHRD_INFINIBAND
{"infiniband",ARPHRD_INFINIBAND},
#endif
#ifdef ARPHRD_IEEE802_TR
{"ieee802",ARPHRD_IEEE802}, {"tr",ARPHRD_IEEE802_TR},
#else
{"tr",ARPHRD_IEEE802},
#endif
#ifdef ARPHRD_IEEE80211
{"ieee802.11",ARPHRD_IEEE80211},
#endif
#ifdef ARPHRD_IEEE1394
{"ieee1394",ARPHRD_IEEE1394},
#endif
{"irda",ARPHRD_IRDA},{"slip",ARPHRD_SLIP},{"cslip",ARPHRD_CSLIP},
{"slip6",ARPHRD_SLIP6}, {"cslip6",ARPHRD_CSLIP6}, {"ppp",ARPHRD_PPP},
{"ipip",ARPHRD_TUNNEL}, {"tunnel6",ARPHRD_TUNNEL6},
{"gre",ARPHRD_IPGRE},
#ifdef ARPHRD_VOID
{"void",ARPHRD_VOID},
#endif
{NULL,-1}};
char *lname = get_flag_string(hwtypes, iface->ifi_type, 0);
link->next = link->prev = 0;
link->iface_type = iface->ifi_type;
if (!lname) error_exit("Invalid link.");
xstrncpy(link->type, lname, IFNAMSIZ);
free(lname);
link->iface_idx = iface->ifi_index;
link->flags = iface->ifi_flags;
if (*argv && !strcasecmp("up",*argv) && !(link->flags & IFF_UP)) return 1;
link->parent = -1;
for (; RTA_OK(attr, len); attr = RTA_NEXT(attr, len)) {
switch(attr->rta_type) {
case IFLA_IFNAME:
snprintf(link->iface, IFNAMSIZ, "%s",(char *) RTA_DATA(attr));
break;
case IFLA_ADDRESS:
if ( iface->ifi_type== ARPHRD_TUNNEL ||
iface->ifi_type == ARPHRD_SIT ||
iface->ifi_type == ARPHRD_IPGRE)
inet_ntop(AF_INET, RTA_DATA(attr), link->laddr, 64);
else fill_address(RTA_DATA(attr), link->laddr);
break;
case IFLA_BROADCAST:
if (iface->ifi_type== ARPHRD_TUNNEL ||
iface->ifi_type == ARPHRD_SIT ||
iface->ifi_type == ARPHRD_IPGRE)
inet_ntop(AF_INET, RTA_DATA(attr), link->bcast, 64);
else fill_address(RTA_DATA(attr), link->bcast);
break;
case IFLA_MTU:
link->mtu = *((int*)(RTA_DATA(attr)));
break;
case IFLA_QDISC:
snprintf(link->qdiscpline, IFNAMSIZ, "%s", (char *) RTA_DATA(attr));
break;
case IFLA_STATS :
link->rt_stat = *((struct rtnl_link_stats*) RTA_DATA(attr));
break;
case IFLA_LINK:
link->parent = *((int*)(RTA_DATA(attr)));
break;
case IFLA_TXQLEN:
link->txqueuelen = *((int*)(RTA_DATA(attr)));
break;
case IFLA_OPERSTATE:
{
struct arglist flags[]={{"UNKNOWN", 0}, {"NOTPRESENT", 1},
{"DOWN", 2}, {"LOWERLAYERDOWN", 3}, {"TESTING", 4},
{"DORMANT", 5}, {"UP", 6}, {NULL, -1}};
if (!(lname = get_flag_string(flags, *((int*)(RTA_DATA(attr))), 0)))
error_exit("Invalid state.");
xstrncpy(link->state, lname,IFNAMSIZ);
free(lname);
}
break;
default: break;
}
}
return 0;
}
static int display_link_info(struct nlmsghdr *mhdr, char **argv)
{
struct linkdata link;
if (!get_link_info(mhdr, &link, argv)) {
if (TT.is_addr) {
struct linkdata *lnk = xzalloc(sizeof(struct linkdata));
memcpy(lnk, &link, sizeof(struct linkdata));
dlist_add_nomalloc((struct double_list **)&linfo,
(struct double_list *)lnk);
}
else print_link_output(&link);
}
return 0;
}
static int link_show(char **argv)
{
struct {
struct nlmsghdr mhdr;
struct ifinfomsg info;
} request;
uint32_t index = 0;
if (*argv && strcasecmp("up",*argv)) index = get_ifaceindex(*argv, 1);
memset(&request, 0, sizeof(request));
request.mhdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
request.mhdr.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK;
if (!index) request.mhdr.nlmsg_flags |= NLM_F_ROOT|NLM_F_MATCH;
else request.info.ifi_change = 0xffffffff; // used in single operation
request.mhdr.nlmsg_type = RTM_GETLINK;
request.info.ifi_index = index;
request.info.ifi_family = AF_UNSPEC;
send_nlmesg(0, 0, 0, (void*)&request, sizeof(request));
return (filter_nlmesg(display_link_info, argv));
}
static int iplink(char **argv)
{
int idx;
cmdobj ipcmd, cmdobjlist[] = {linkupdate, link_set, link_show};
struct arglist cmd_objectlist[] = {{"add", 0}, {"delete", 0},
{"set", 1}, {"show", 2}, {"list", 2}, {"lst", 2}, {NULL,-1}};
if (!*argv) idx = 2;
else if ((idx = substring_to_idx(*argv++, cmd_objectlist)) == -1)
help_exit(0);
ipcmd = cmdobjlist[idx];
return ipcmd(argv);
}
// ===========================================================================
// Code for ip addr.
// ===========================================================================
static int print_addrinfo(struct nlmsghdr *h, int flag_l)
{
struct rtattr *rta, *rta_tb[IFA_MAX+1] = {0,};
char *family = toybuf, *scope = toybuf+256, *label = toybuf+512,
*brd = toybuf+768, *peer = toybuf+1024, *any = toybuf+1280,
lbuf[INET6_ADDRSTRLEN] = {0,}, lbuf_ifa[INET6_ADDRSTRLEN] = {0,};
struct ifaddrmsg *ifa = NLMSG_DATA(h);
int len;
if ((len = h->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa))) < 0) {
error_msg("wrong nlmsg len %d", len);
return 0;
}
for (rta = IFA_RTA(ifa); RTA_OK(rta, len); rta=RTA_NEXT(rta, len))
if (rta->rta_type <= IFA_MAX) rta_tb[rta->rta_type] = rta;
if (!rta_tb[IFA_LOCAL]) rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
if (!rta_tb[IFA_ADDRESS]) rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL];
if ((addrinfo.scope ^ ifa->ifa_scope)&addrinfo.scopemask) return 0;
if (addrinfo.ifindex && addrinfo.ifindex != ifa->ifa_index) return 0;
if (flag_l && addrinfo.label && ifa->ifa_family == AF_INET6) return 0;
if ((rta_tb[IFA_LABEL])) {
xstrncpy(label, RTA_DATA(rta_tb[IFA_LABEL]), 256);
label[255] = '\0';
if (addrinfo.label && fnmatch(addrinfo.label, label, 0))
return 0;
}
if (TT.flush) {
if (ifa->ifa_index == addrinfo.ifindex) {
h->nlmsg_type = RTM_DELADDR;
h->nlmsg_flags = NLM_F_REQUEST;
send_nlmesg(RTM_DELADDR, 0, 0, h, h->nlmsg_len);
return 0;
}
}
if (h->nlmsg_type == RTM_DELADDR) printf("Deleted ");
if (TT.singleline) {
if (!if_indextoname(ifa->ifa_index, lbuf)) perror_exit(NULL);
printf("%u: %s",ifa->ifa_index, lbuf);
}
sprintf(scope, " scope %s ", namefromRPDB(ifa->ifa_scope, RPDB_rtscopes));
if (ifa->ifa_family == AF_INET) strcpy(family, " inet ");
else if (ifa->ifa_family == AF_INET6) strcpy(family, " inet6 ");
else sprintf(family, " family %d", ifa->ifa_family);
if (rta_tb[IFA_LOCAL]) {
if (!inet_ntop(ifa->ifa_family, RTA_DATA(rta_tb[IFA_LOCAL]),
lbuf, sizeof(lbuf))) perror_exit("inet");
sprintf(family+strlen(family), lbuf, strlen(lbuf));
if (!rta_tb[IFA_ADDRESS] || !memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]),
RTA_DATA(rta_tb[IFA_LOCAL]), 4))
sprintf(family+strlen(family), "/%d ", ifa->ifa_prefixlen);
else {
if (!inet_ntop(ifa->ifa_family, RTA_DATA(rta_tb[IFA_ADDRESS]),
lbuf_ifa, sizeof(lbuf_ifa))) perror_exit("inet");
sprintf(peer, " peer %s/%d ", lbuf_ifa, ifa->ifa_prefixlen);
}
}
if (addrinfo.to && strcmp(addrinfo.addr, lbuf))
return 0;
if (rta_tb[IFA_BROADCAST]) {
if (!inet_ntop(ifa->ifa_family, RTA_DATA(rta_tb[IFA_BROADCAST]),
lbuf, sizeof(lbuf))) perror_exit("inet");
sprintf(brd, " brd %s", lbuf);
}else brd = "";
if (rta_tb[IFA_ANYCAST]) {
if (!inet_ntop(ifa->ifa_family, RTA_DATA(rta_tb[IFA_ANYCAST]),
lbuf, sizeof(lbuf))) perror_exit("inet");
sprintf(any, " any %s", lbuf);
}
if (ifa->ifa_family == AF_INET)
printf("%s%s%s%s%s %c", family, brd, peer, scope, label,
(TT.singleline? '\0' : '\n'));
else printf("%s%s %c", family, scope, (TT.singleline? '\0' : '\n'));
if (TT.singleline && (ifa->ifa_family == AF_INET)) xputc('\n');
if (rta_tb[IFA_CACHEINFO]) {
struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
printf("%c valid_lft ", (TT.singleline? '\\' : '\0'));
if (ci->ifa_valid == 0xFFFFFFFFU) printf("forever");
else printf("%usec", ci->ifa_valid);
printf(" preferred_lft ");
if (ci->ifa_prefered == 0xFFFFFFFFU) printf("forever");
else printf("%dsec", ci->ifa_prefered);
xputc('\n');
}
return 0;
}
static int ipaddrupdate(char **argv)
{
int length, cmd = !memcmp("add", argv[-1], strlen(argv[-1]))
? RTM_NEWADDR: RTM_DELADDR;
int idx = 0,length_brd = 0, length_peer = 0,length_any = 0,length_local = 0,
scoped = 0;
char *dev = NULL,*label = NULL, reply[8192];
struct nlmsghdr *addr_ptr = NULL;
struct nlmsgerr *err = NULL;
struct arglist cmd_objectlist[] = {{"dev",0}, {"peer", 1},
{"remote", 2}, {"broadcast", 3}, {"brd", 4}, {"label", 5},
{"anycast", 6},{"scope", 7}, {"local", 8}, {NULL, -1}};
struct {
struct nlmsghdr nlm;
struct ifaddrmsg ifadd;
char buf[256];
} req;
typedef struct {
int family, bytelen, bitlen;
__u32 data[8];
} option_data;
option_data local;
memset(&req, 0, sizeof(req));
req.nlm.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
req.nlm.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK;
req.nlm.nlmsg_type = cmd;
req.ifadd.ifa_family = TT.addressfamily;
while (*argv) {
idx = substring_to_idx(*argv, cmd_objectlist);
if (idx >= 0)
if (!*++argv)
error_exit("Incomplete Command line");
switch(idx) {
case 0:
dev = *argv;
break;
case 1:
case 2:
{
uint32_t addr[4] = {0,}, netmask = 0;
uint8_t len = 0;
parse_prefix(addr, &netmask, &len, *argv,
req.ifadd.ifa_family);
if (len)
req.ifadd.ifa_family = ((len == 4) ? AF_INET : AF_INET6);
length_peer = len;
add_string_to_rtattr(&req.nlm, sizeof(req),
IFA_ADDRESS, addr, len);
req.ifadd.ifa_prefixlen = netmask;
}
break;
case 3:
case 4:
if (*argv[0] == '+') {
length_brd = -1;
} else if (*argv[0] == '-') {
length_brd = -2;
} else {
uint32_t addr[4] = {0,};
uint8_t af = AF_UNSPEC;
if (get_prefix(addr, &af, *argv, req.ifadd.ifa_family))
error_exit("Invalid prefix");
length_brd = ((af == AF_INET6) ? 16 : 4);
if (req.ifadd.ifa_family == AF_UNSPEC)
req.ifadd.ifa_family = af;
add_string_to_rtattr(&req.nlm, sizeof(req),
IFA_BROADCAST, &addr, length_brd);
}
break;
case 5:
label = *argv;
add_string_to_rtattr(&req.nlm, sizeof(req),
IFA_LABEL, label, strlen(label) + 1);
break;
case 6:
{
uint32_t addr[4] = {0,};
uint8_t af = AF_UNSPEC;
if (get_prefix(addr, &af, *argv, req.ifadd.ifa_family))
error_exit("Invalid prefix");
length_any = ((af == AF_INET6) ? 16 : 4);
if (req.ifadd.ifa_family == AF_UNSPEC)
req.ifadd.ifa_family = af;
add_string_to_rtattr(&req.nlm, sizeof(req),
IFA_ANYCAST, &addr, length_any);
}
break;
case 7:
{
int scope = idxfromRPDB(*argv, RPDB_rtscopes);
if (scope < 0) error_exit("wrong scope '%s'", *argv);
req.ifadd.ifa_scope = scope;
scoped = 1;
}
break;
default:
{
//local is by default
uint32_t addr[8] = {0,}, netmask = 0;
uint8_t len = 0;
parse_prefix(addr, &netmask, &len, *argv,
req.ifadd.ifa_family);
if (len)
req.ifadd.ifa_family = ((len == 4) ? AF_INET : AF_INET6);
length_local = len;
local.bitlen = netmask;
local.bytelen = len;
memcpy(local.data, addr, sizeof(local.data));
local.family = req.ifadd.ifa_family;
add_string_to_rtattr(&req.nlm, sizeof(req),
IFA_LOCAL, &local.data, local.bytelen);
}
break;
}
argv++;
}
if (!dev) error_exit("need \"dev \" argument");
if (label && strncmp(dev, label, strlen(dev)) != 0)
error_exit("\"dev\" (%s) must match \"label\" (%s)", dev, label);
if (length_peer == 0 && length_local && cmd != RTM_DELADDR){
add_string_to_rtattr(&req.nlm, sizeof(req),
IFA_ADDRESS, &local.data, local.bytelen);
}
if (length_brd < 0 && cmd != RTM_DELADDR){
int i;
if (req.ifadd.ifa_family != AF_INET)
error_exit("broadcast can be set only for IPv4 addresses");
if (local.bitlen <= 30) {
for (i = 31; i >= local.bitlen; i--) {
if (length_brd == -1)
local.data[0] |= htonl(1<<(31-i));
else
local.data[0] &= ~htonl(1<<(31-i));
}
add_string_to_rtattr(&req.nlm, sizeof(req),
IFA_BROADCAST, &local.data, local.bytelen);
length_brd = local.bytelen;
}
}
if (req.ifadd.ifa_prefixlen == 0)
req.ifadd.ifa_prefixlen = local.bitlen;
if (!scoped && (cmd != RTM_DELADDR) && (local.family == AF_INET)
&& (local.bytelen >= 1 && *(uint8_t*)&local.data == 127))
req.ifadd.ifa_scope = RT_SCOPE_HOST;
req.ifadd.ifa_index = get_ifaceindex(dev, 1);
send_nlmesg(RTM_NEWADDR, 0, AF_UNSPEC, (void *)&req, req.nlm.nlmsg_len);
length = recv(TT.sockfd, reply, sizeof(reply), 0);
addr_ptr = (struct nlmsghdr *) reply;
for (; NLMSG_OK(addr_ptr, length); addr_ptr = NLMSG_NEXT(addr_ptr, length)) {
if (addr_ptr->nlmsg_type == NLMSG_DONE)
return 1;
if (addr_ptr->nlmsg_type == NLMSG_ERROR)
err = (struct nlmsgerr*) NLMSG_DATA(addr_ptr);
if (err && err->error) {
errno = -err->error;
perror_exit("RTNETLINK answers:");
}
}
return 0;
}
static int ipaddr_listflush(char **argv)
{
int idx; uint32_t netmask = 0, found = 0;
char *tmp = NULL, *name = NULL;
struct double_list *dlist;
struct arglist cmd_objectlist[] = {{"to", 0}, {"scope", 1}, {"up", 2},
{"label", 3}, {"dev", 4}, {NULL, -1}};
TT.flush = *argv[-1] == 'f' ? 1 : 0;
memset(&addrinfo, 0, sizeof(addrinfo));
if (TT.flush) {
if (!*argv)
error_exit("Incomplete command for \"flush\"");
if (TT.addressfamily == AF_PACKET)
error_exit("Can't flush link Addressess");
}
addrinfo.scope = -1;
while (*argv) {
switch (idx = substring_to_idx(*argv, cmd_objectlist)) {
case 0:
{// ADDR_TO
if (!*++argv) error_exit("Incomplete Command line");
else if (!strcmp(*argv, "0")) return 0;
uint32_t addr[4] = {0,};
uint8_t len = 0;
addrinfo.to = 1;
parse_prefix(addr, &netmask, &len, *argv, TT.addressfamily);
if (len)
TT.addressfamily = ((len == 4) ? AF_INET : AF_INET6);
addrinfo.addr = strtok(*argv, "/");
}
break;
case 1: // ADDR_SCOPE
{
int scope = 0;
if (!*++argv) error_exit("Incomplete Command line");
name = *argv;
addrinfo.scopemask = -1;
if (isdigit(**argv)) {
int idx = atolx(*argv);
name = xstrdup(namefromRPDB(idx, RPDB_rtscopes));
}
if ((scope = idxfromRPDB(name, RPDB_rtscopes)) < 0) {
if (strcmp(name, "all"))
error_exit("wrong scope '%s'", name);
scope = RT_SCOPE_NOWHERE;
addrinfo.scopemask = 0;
}
if (isdigit(**argv))
free(name);
addrinfo.scope = scope;
}
break;
case 2: // ADDR_UP
addrinfo.up = 1;
break;
case 3: // ADDR_LABEL
if (!*++argv) error_exit("Incomplete Command line");
addrinfo.label = *argv;
break;
case 4: // ADDR_DEV
if (!*++argv) error_exit("Incomplete Command line");
default:
if (TT.filter_dev)
error_exit("Either \"dev\" is duplicate or %s is garbage",
*argv);
TT.filter_dev = *argv;
break;
}
argv++;
}
link_show(&tmp);
while ( linfo && (dlist = dlist_pop(&linfo))){
struct linkdata *tmp = (struct linkdata*) dlist;
char *temp = &tmp->iface[0];
if (TT.filter_dev && strcmp(TT.filter_dev, temp))
continue;
found = 1;
if (TT.flush && addrinfo.label) ipaddr_print( tmp, 0);
if (addrinfo.up && !(tmp->flags & IFF_UP)){
ipaddr_print(tmp, 0);
continue;
}
if (addrinfo.label){
if ( fnmatch(addrinfo.label, temp, 0)) {
ipaddr_print(tmp, 1);
continue;
}
}
if (!TT.addressfamily && ! TT.flush ) print_link_output(tmp);
ipaddr_print(tmp, 0);
free(tmp);
}
if (TT.filter_dev && !found)
error_exit("Device \"%s\" doesn't exist. \n", TT.filter_dev);
return 0;
}
static int ipaddr_print( struct linkdata *link, int flag_l)
{
struct nlmsghdr *addr_ptr;
int ip_match = 0;
addrinfo.ifindex = link->iface_idx;
send_nlmesg(RTM_GETADDR, NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST,
AF_UNSPEC, NULL, 0);
if (TT.addressfamily == AF_PACKET) print_link_output(link);
if (addrinfo.label){
char *col = strchr(addrinfo.label, ':');
if (!col && (fnmatch(addrinfo.label, &link->iface[0], 0)))
return 0;
}
while (1){
int len = recv(TT.sockfd, TT.gbuf, sizeof(TT.gbuf), 0);
addr_ptr = (struct nlmsghdr *)TT.gbuf;
struct ifaddrmsg *addressInfo = NLMSG_DATA(addr_ptr);
char lbuf[INET6_ADDRSTRLEN];
struct rtattr *rta, *rta_tb[IFA_MAX+1] = {0,};
int len1 = addr_ptr->nlmsg_len - NLMSG_LENGTH(sizeof(*addressInfo));
if (len1 > 0) {
for (; NLMSG_OK(addr_ptr, len); addr_ptr = NLMSG_NEXT(addr_ptr, len)) {
addressInfo = NLMSG_DATA(addr_ptr);
if (TT.addressfamily && TT.addressfamily != addressInfo->ifa_family)
continue;
if (addrinfo.ifindex && addrinfo.ifindex != addressInfo->ifa_index)
continue;
if (addrinfo.to) {
memset(rta_tb, 0, sizeof(rta_tb));
int rt_len = IFA_PAYLOAD(addr_ptr);
for (rta = IFA_RTA(addressInfo); RTA_OK(rta, rt_len); rta=RTA_NEXT(rta, rt_len)) {
if (rta->rta_type <= IFA_MAX) rta_tb[rta->rta_type] = rta;
}
if (!rta_tb[IFA_LOCAL]) rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
if (rta_tb[IFA_LOCAL]) {
if (!inet_ntop(TT.addressfamily, RTA_DATA(rta_tb[IFA_LOCAL]),
lbuf, sizeof(lbuf))) perror_exit("inet");
if (strcmp(addrinfo.addr, lbuf))
continue;
ip_match=1;
}
if (!ip_match)
continue;
}
if (!TT.flush){
if (addrinfo.scope != -1 && TT.addressfamily && TT.addressfamily ==
addressInfo->ifa_family &&
(addrinfo.ifindex == addressInfo->ifa_index)) {
if ((addrinfo.scope ^ addressInfo->ifa_scope) & addrinfo.scopemask)
continue;
else if (addrinfo.up && (link->flags & IFF_UP))
print_link_output(link);
else if (!addrinfo.up) print_link_output(link);
}
if (TT.addressfamily &&
(addrinfo.ifindex == addressInfo->ifa_index) &&
(addrinfo.scope == -1)){
if (addrinfo.up && (link->flags & IFF_UP))
print_link_output(link);
else if (!addrinfo.up) print_link_output(link);
}
}
for (; NLMSG_OK(addr_ptr, len); addr_ptr = NLMSG_NEXT(addr_ptr, len)) {
if ((addr_ptr->nlmsg_type == RTM_NEWADDR))
print_addrinfo(addr_ptr, flag_l);
if ((addr_ptr->nlmsg_type == NLMSG_DONE) ||
(addr_ptr->nlmsg_type == NLMSG_ERROR) ||
(TT.flush && addrinfo.to))
goto ret_stop;
}
if ((addr_ptr->nlmsg_type == NLMSG_DONE) ||
(addr_ptr->nlmsg_type == NLMSG_ERROR))
break;
}
}
else
return 0;
}
ret_stop:
return 0;
}
static int ipaddr(char **argv)
{
int idx;
cmdobj ipcmd, cmdobjlist[] = {ipaddrupdate, ipaddr_listflush};
struct arglist cmd_objectlist[] = { {"add", 0}, {"delete", 0},
{"list", 1},{"show", 1},{"lst", 1}, {"flush", 1}, {NULL,-1}};
TT.is_addr++;
if (!*argv) idx = 1;
else if ((idx = substring_to_idx(*argv++, cmd_objectlist)) == -1)
help_exit(0);
ipcmd = cmdobjlist[idx];
return ipcmd(argv);
}
// ===========================================================================
// code for ip route
// ===========================================================================
struct I_data {
unsigned char family;
uint32_t addr[8] , netmask ;
uint8_t len ;
};
struct {
int tb,idev,odev,proto;
struct I_data rvia, rdst, mdst, rsrc, msrc;
} gfilter;
static void show_iproute_help(void)
{
char *errmsg = "\n\n" \
"iproute { list | flush } SELECTOR\n" \
"iproute get ADDRESS [from ADDRESS iif STRING]\n" \
" [oif STRING]\n" \
"iproute { add | del | change | append | replace | test } ROUTE\n" \
" SELECTOR := [root PREFIX] [match PREFIX] [proto RTPROTO]\n" \
" ROUTE := [TYPE] PREFIX [proto RTPROTO] [metric METRIC]";
error_exit(errmsg);
}
static int display_route_info(struct nlmsghdr *mhdr, char **argv)
{
char *inetval = NULL, out[1024] = {0};
struct rtmsg *msg = NLMSG_DATA(mhdr);
struct rtattr *rta, *attr[RTA_MAX+1] = {0,};
int32_t tvar, msglen = mhdr->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg));
int hlen = ((msg->rtm_family == AF_INET) ? 32
: ((msg->rtm_family == AF_INET6) ? 128 : -1));
if (mhdr->nlmsg_type != RTM_NEWROUTE) return 0;
if (msglen < 0) return 1;
if (msg->rtm_family == AF_INET6) {
if (gfilter.tb) {
if (gfilter.tb < 0) {
if (!(msg->rtm_flags & RTM_F_CLONED)) return 0;
} else {
if (msg->rtm_flags & RTM_F_CLONED) return 0;
if (gfilter.tb == RT_TABLE_LOCAL && msg->rtm_type != RTN_LOCAL)
return 0;
else if (gfilter.tb == RT_TABLE_MAIN && msg->rtm_type == RTN_LOCAL)
return 0;
}
}
}
else if (gfilter.tb > 0 && gfilter.tb != msg->rtm_table) return 0;
if (gfilter.proto && (msg->rtm_protocol != gfilter.proto)) return 0;
if (gfilter.rdst.family && (msg->rtm_family != gfilter.rdst.family ||
gfilter.rdst.netmask > msg->rtm_dst_len)) return 0;
if (gfilter.mdst.family && (msg->rtm_family != gfilter.mdst.family
|| (gfilter.mdst.netmask < msg->rtm_dst_len))) return 0;
if (gfilter.rsrc.family && (msg->rtm_family != gfilter.rsrc.family
|| gfilter.rsrc.netmask > msg->rtm_src_len)) return 0;
if (gfilter.msrc.family && (msg->rtm_family != gfilter.msrc.family
|| (gfilter.msrc.netmask < msg->rtm_src_len))) return 0;
tvar = msglen;
for (rta = RTM_RTA(msg); RTA_OK(rta, tvar); rta=RTA_NEXT(rta, tvar))
if (rta->rta_type <= RTA_MAX) attr[rta->rta_type] = rta;
if (msg->rtm_type != RTN_UNICAST)
sprintf(out,"%s%s ", out,rtmtype_idx2str(msg->rtm_type));
if (attr[RTA_DST]) {
inetval = (char *)inet_ntop(msg->rtm_family, RTA_DATA(attr[RTA_DST]),
toybuf, sizeof(toybuf));
if (gfilter.rdst.family &&
memcmp(RTA_DATA(attr[RTA_DST]), &gfilter.rdst.addr, gfilter.rdst.len))
return 0;
if (gfilter.mdst.family &&
memcmp(RTA_DATA(attr[RTA_DST]), &gfilter.mdst.addr, gfilter.mdst.len))
return 0;
sprintf(out,"%s%s",out,inetval);
}
if (msg->rtm_dst_len) sprintf(out,"%s/%d ", out,msg->rtm_dst_len);
else sprintf(out,"%s%s",out,"default ");
if (attr[RTA_SRC]) {
inetval = (char *)inet_ntop(msg->rtm_family, RTA_DATA(attr[RTA_SRC]),
toybuf, sizeof(toybuf));
if (gfilter.rsrc.family &&
memcmp(RTA_DATA(attr[RTA_SRC]), &gfilter.rsrc.addr, gfilter.rsrc.len))
return 0;
if (gfilter.msrc.family &&
memcmp(RTA_DATA(attr[RTA_SRC]), &gfilter.msrc.addr, gfilter.msrc.len))
return 0;
sprintf(out, "%s from %s", out, inetval);
}
if (msg->rtm_src_len) sprintf(out, "%s/%d ", out, msg->rtm_src_len);
if (attr[RTA_GATEWAY]) {
inetval = (char *)inet_ntop(msg->rtm_family, RTA_DATA(attr[RTA_GATEWAY]),
toybuf, sizeof(toybuf));
sprintf(out, "%s via %s ", out, inetval);
}
if (gfilter.rvia.family) {
char tmp[256];
if (!attr[RTA_GATEWAY]) return 0;
if (strcmp((char *)inet_ntop(msg->rtm_family, gfilter.rvia.addr,
tmp, sizeof(tmp)), inetval)) return 0;
}
if (gfilter.odev != 0) if (!attr[RTA_OIF]) return 0;
if (attr[RTA_OIF]) {
if (gfilter.odev !=0 && gfilter.odev != *(int*)RTA_DATA(attr[RTA_OIF]))
return 0;
sprintf(out, "%s dev %s ", out,
if_indextoname(*(int*)RTA_DATA(attr[RTA_OIF]), toybuf));
}
if (attr[RTA_PREFSRC] && hlen) {
inetval = (char *)inet_ntop(msg->rtm_family, RTA_DATA(attr[RTA_PREFSRC]),
toybuf, sizeof(toybuf));
sprintf(out, "%s src %s ", out, inetval);
}
if (attr[RTA_PRIORITY])
sprintf(out, "%s metric %d ", out, *(uint32_t*)RTA_DATA(attr[RTA_PRIORITY]));
if (msg->rtm_family == AF_INET6) {
struct rta_cacheinfo *ci = NULL;
if (attr[RTA_CACHEINFO]) ci = RTA_DATA(attr[RTA_CACHEINFO]);
if ((msg->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) {
if (msg->rtm_flags & RTM_F_CLONED) sprintf(out, "%s%s cache ",
out, (!TT.singleline ? "\n" : " "));
if (ci && ci->rta_expires) {
int hz = 0;
FILE *fp = xfopen("/proc/net/psched","r");
if (fp) {
unsigned int nom, denom;
if (fscanf(fp, "%*08x%*08x%08x%08x", &nom, &denom) == 2)
if (nom == 1000000)
hz = denom;
fclose(fp);
}
if (!hz) hz = sysconf(_SC_CLK_TCK);
sprintf(out, "%s expires %dsec", out, ci->rta_expires /hz);
}
if (ci && ci->rta_error) sprintf(out, "%s error %d", out, ci->rta_error);
}
else if (ci && ci->rta_error)
sprintf(out, "%s error %d", out, ci->rta_error);
}
if (attr[RTA_IIF] && !gfilter.idev)
sprintf(out, "%s iif %s", out,
if_indextoname(*(int*)RTA_DATA(attr[RTA_IIF]), toybuf));
if (TT.flush || (TT.connected && !TT.from_ok))
memcpy(toybuf, (void*)mhdr,mhdr->nlmsg_len);
if (TT.flush) {
int sockfd = 0;
struct nlmsghdr* mhdr = (struct nlmsghdr*)toybuf;
struct rtmsg *msg = NLMSG_DATA(mhdr);
int tvar, msglen = mhdr->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg));
struct rtattr *rta, *attr[RTA_MAX+1] = {0,};
tvar = msglen;
for (rta = RTM_RTA(msg); RTA_OK(rta, tvar); rta=RTA_NEXT(rta, tvar))
if (rta->rta_type <= RTA_MAX) attr[rta->rta_type] = rta;
if (msg->rtm_family == AF_INET6
&& !msg->rtm_dst_len
&& msg->rtm_type == RTN_UNREACHABLE
&& attr[RTA_PRIORITY]
&& *(int*)RTA_DATA(attr[RTA_PRIORITY]) == -1)
return 0;
mhdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
mhdr->nlmsg_type = RTM_DELROUTE;
mhdr->nlmsg_pid = 0;
sockfd = xsocket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (send(sockfd , (void*)mhdr, mhdr->nlmsg_len, 0) < 0)
perror_exit("Unable to send data on socket.");
while (1) {
struct nlmsghdr *mhdr;
int msglen = recv(sockfd, toybuf, sizeof(toybuf), 0);
if ((msglen < 0) && (errno == EINTR || errno == EAGAIN)) continue;
else if (msglen < 0) {
error_msg("netlink receive error %s", strerror(errno));
xclose(sockfd);
return 1;
} else if (!msglen) {
error_msg("EOF on netlink");
xclose(sockfd);
return 1;
}
for (mhdr = (struct nlmsghdr*)toybuf; NLMSG_OK(mhdr, msglen);
mhdr = NLMSG_NEXT(mhdr, msglen)) {
switch (mhdr->nlmsg_type) {
case NLMSG_DONE:
xclose(sockfd);
return 0;
case NLMSG_ERROR:
{
struct nlmsgerr *merr = (struct nlmsgerr*)NLMSG_DATA(mhdr);
if (merr->error == 0) { xclose(sockfd); return 0; }
if (mhdr->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr)))
error_msg("ERROR truncated");
else {
errno = -merr->error;
perror_msg("RTNETLINK answers");
}
xclose(sockfd);
return 1;
}
default:
break;
}
} // End of for loop.
} // End of while loop.
xclose(sockfd);
} else printf("%s\n",out);
return 0;
}
static int route_get(char **argv)
{
int idx, flag;
struct arglist cmd_objectlist[] = {{"from", 0}, {"iif", 1}, {"oif", 2},
{"dev", 3}, {"notify", 4}, {"connected", 5}, {"to", 6}, {NULL, -1}};
char *idev = NULL, *odev = NULL;
struct {
struct nlmsghdr mhdr;
struct rtmsg msg;
char buf[1024];
} request;
memset(&request, 0, sizeof(request));
request.mhdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
request.mhdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
request.mhdr.nlmsg_type = RTM_GETROUTE;
request.msg.rtm_family = AF_UNSPEC;
for (; *argv; argv++) {
switch(idx = substring_to_idx(*argv, cmd_objectlist)) {
case 0: TT.from_ok = 1; // dst address
case 6: argv++; //fallthrough
default:
{
uint32_t addr[8] = {0,}, netmask = 0;
uint8_t len = 0;
if (!*argv) error_exit("'%s': Missing Prefix", argv[-1]);
parse_prefix(addr, &netmask, &len, *argv, request.msg.rtm_family);
if (len) request.msg.rtm_family = ((len == 4) ? AF_INET : AF_INET6);
netmask = (request.msg.rtm_family == AF_INET6) ? 128 : 32;
if (!idx) request.msg.rtm_src_len = netmask;
else request.msg.rtm_dst_len = netmask;
add_string_to_rtattr(&request.mhdr, sizeof(request),
(!idx ? RTA_SRC : RTA_DST), addr, len);
break;
}
case 1:
case 2:
case 3:
if (!*++argv) show_iproute_help();
if (idx == 1) idev = *argv, flag = RTA_IIF;
else odev = *argv, flag = RTA_OIF;
idx = get_ifaceindex(*argv, 1);
add_string_to_rtattr(&request.mhdr, sizeof(request),
flag, (char*)&idx, sizeof(idx));
break;
case 4:
request.msg.rtm_flags |= RTM_F_NOTIFY;
break;
case 5:
TT.connected = 1;
break;
}
}
if (!request.msg.rtm_dst_len)
error_exit("need at least destination address");
send_nlmesg(0, 0, 0, &request, sizeof(request));
filter_nlmesg(display_route_info, NULL);
if (TT.connected && !TT.from_ok) {
struct nlmsghdr *mhdr = (struct nlmsghdr*)toybuf;
struct rtmsg *msg = NLMSG_DATA(mhdr);
int tvar, msglen = mhdr->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg));
struct rtattr *rta, *attr[RTA_MAX+1] = {0,};
if (mhdr->nlmsg_type != RTM_NEWROUTE) error_exit("not a route?");
if (msglen < 0) error_exit("wrong len %d", msglen);
tvar = msglen;
for (rta = RTM_RTA(msg); RTA_OK(rta, tvar); rta=RTA_NEXT(rta, tvar))
if (rta->rta_type <= RTA_MAX) attr[rta->rta_type] = rta;
if (attr[RTA_PREFSRC]) {
attr[RTA_PREFSRC]->rta_type = RTA_SRC;
msg->rtm_src_len = 8*RTA_PAYLOAD(attr[RTA_PREFSRC]);
} else if (!attr[RTA_SRC]) error_exit("can't connect the route");
if (!odev && attr[RTA_OIF]) attr[RTA_OIF]->rta_type = 0;
if (attr[RTA_GATEWAY]) attr[RTA_GATEWAY]->rta_type = 0;
if (!idev && attr[RTA_IIF]) attr[RTA_IIF]->rta_type = 0;
mhdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
mhdr->nlmsg_type = RTM_GETROUTE;
mhdr->nlmsg_pid = 0;
xclose(TT.sockfd);
TT.sockfd = xsocket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
send_nlmesg(0, 0, 0, mhdr, mhdr->nlmsg_len);
filter_nlmesg(display_route_info, NULL);
}
return 0;
}
static int route_show_flush(char **argv)
{
struct arglist cmd_objectlist[] = {{"protocol", 0}, {"dev", 1}, {"oif", 2},
{"iif", 3}, {"via", 4}, {"table", 5}, {"cache", 6}, {"from", 7},
{"to", 8}, {"all", 9}, {"root", 10}, {"match", 11}, {"exact", 12},
{"main", 13}, {NULL,-1}};
int family = TT.addressfamily, idx;
struct {
struct nlmsghdr mhdr;
struct rtmsg msg;
} request;
if (*argv[-1] == 'f') TT.flush = 1;
if (TT.flush && !*argv) show_iproute_help();
gfilter.tb = RT_TABLE_MAIN;
for (; *argv; argv++) {
switch (idx = substring_to_idx(*argv, cmd_objectlist)) {
case 0:
if (!*++argv) show_iproute_help();
if ((idx = idxfromRPDB(*argv,RPDB_rtprotos)) < 0)
error_exit("Invalid argument protocol.");
gfilter.proto = idx;
break;
case 1:
case 2:
case 3:
{
if (!*++argv) show_iproute_help();
int dev = get_ifaceindex(*argv, 1);
if (idx == 3) gfilter.idev = dev;
else gfilter.odev = dev;
}
break;
case 4:
if (!*++argv) show_iproute_help();
parse_prefix(gfilter.rvia.addr, &gfilter.rvia.netmask,
&gfilter.rvia.len, *argv, gfilter.rvia.family);
if (gfilter.rvia.len)
gfilter.rvia.family = ((gfilter.rvia.len == 4) ?
AF_INET : AF_INET6);
break;
case 5:
if (!*++argv) show_iproute_help();
idx = substring_to_idx(*argv, cmd_objectlist);
if (idx == 6) gfilter.tb = -1;
else if (idx == 9) gfilter.tb = 0;
else if (idx != 13) {
if ((gfilter.tb = idxfromRPDB(*argv, RPDB_rttables)) < 0)
error_exit("table %s is invalid.", *argv);
}
break;
case 6:
gfilter.tb = -1;
break;
case 7:
if (!*++argv) show_iproute_help();
idx = substring_to_idx(*argv, cmd_objectlist);
if (idx < 0) if (!*++argv) show_iproute_help();
if (idx == 10)
if (!*++argv) show_iproute_help();
parse_prefix(gfilter.rsrc.addr, &gfilter.rsrc.netmask,
&gfilter.rsrc.len, *argv, gfilter.rsrc.family);
if (gfilter.rsrc.len)
gfilter.rsrc.family = ((gfilter.rsrc.len == 4) ?
AF_INET : AF_INET6);
else {
if ((idx == 12 ||idx == 11) && !*++argv) show_iproute_help();
parse_prefix(gfilter.msrc.addr, &gfilter.msrc.netmask,
&gfilter.msrc.len, *argv, gfilter.msrc.family);
if (gfilter.msrc.len)
gfilter.msrc.family = ((gfilter.msrc.len == 4) ?
AF_INET : AF_INET6);
if (idx != 11) gfilter.rsrc = gfilter.msrc;
}
break;
case 8:
idx = substring_to_idx(*argv, cmd_objectlist);
if (idx != -1 && !*++argv) show_iproute_help();
default: // fallthrough
if (idx == 10) {
if (!*++argv) show_iproute_help();
parse_prefix(gfilter.rdst.addr, &gfilter.rdst.netmask,
&gfilter.rdst.len, *argv, gfilter.rdst.family);
if (gfilter.rdst.len)
gfilter.rdst.family = ((gfilter.rdst.len == 4) ?
AF_INET : AF_INET6);
}
else {
if ((idx == 12 ||idx == 11) && !*++argv) show_iproute_help();
parse_prefix(gfilter.mdst.addr, &gfilter.mdst.netmask,
&gfilter.mdst.len, *argv, gfilter.mdst.family);
if (gfilter.mdst.len)
gfilter.mdst.family = ((gfilter.mdst.len == 4) ?
AF_INET : AF_INET6);
if (idx != 11) gfilter.rdst = gfilter.mdst;
}
break;
}
}
if (family == AF_UNSPEC && gfilter.tb) family = AF_INET;
if (TT.flush) {
if (gfilter.tb < 0) { // flush table cache
if (family != AF_INET6) {
FILE *fp = xfopen("/proc/sys/net/ipv4/route/flush", "w");
if (fwrite("-1",1,2,fp) < 2) error_exit("can't flush routing cache");
fclose(fp);
}
if (family == AF_INET) return 0;
}
}
memset(&request, 0, sizeof (request));
request.mhdr.nlmsg_len = NLMSG_LENGTH(sizeof (struct rtmsg));
request.mhdr.nlmsg_flags = NLM_F_REQUEST;
request.mhdr.nlmsg_flags |= NLM_F_ROOT | NLM_F_MATCH;
request.mhdr.nlmsg_type = RTM_GETROUTE;
request.msg.rtm_family = family;
if (gfilter.tb < 0) request.msg.rtm_flags = RTM_F_CLONED;
send_nlmesg(0, 0, 0, (void*)&request, sizeof (request));
return (filter_nlmesg(display_route_info, NULL));
}
static int route_update(char **argv, unsigned int route_flags)
{
char mxbuf[256], *d = NULL;
struct rtattr *mxrta = (void*)mxbuf;
unsigned mxlock = 0, ok = 0;
int idx;
uint32_t addr[8] = {0,}, netmask = 0;
uint8_t len = 0;
struct arglist cmd_objectlist[] = {{"src", 0}, {"via", 1}, {"mtu", 2},
{"lock", 3}, {"protocol", 4}, {"table", 5}, {"dev", 6}, {"oif", 7},
{"to", 8}, {"metric", 9}, {NULL,-1}
};
enum {
gtwy_ok = 1,
dst_ok = 2,
proto_ok = 4,
type_ok = 8
};
struct {
struct nlmsghdr hdr;
struct rtmsg msg;
char buf[1024];
} req;
memset(&req, 0, sizeof(req));
req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
req.hdr.nlmsg_flags = NLM_F_ACK| NLM_F_REQUEST | route_flags;
req.hdr.nlmsg_type = TT.route_cmd;
req.msg.rtm_family = AF_UNSPEC;
req.msg.rtm_table = RT_TABLE_MAIN;
req.msg.rtm_scope = RT_SCOPE_NOWHERE;
if (TT.route_cmd != RTM_DELROUTE) {
req.msg.rtm_protocol = RTPROT_BOOT;
req.msg.rtm_scope = RT_SCOPE_UNIVERSE;
req.msg.rtm_type = RTN_UNICAST;
}
mxrta->rta_type = RTA_METRICS;
mxrta->rta_len = RTA_LENGTH(0);
for (; *argv; argv++) {
idx = substring_to_idx(*argv, cmd_objectlist);
if (!idx) {
if (!*++argv) show_iproute_help();
parse_prefix(addr, &netmask, &len, *argv, req.msg.rtm_family);
if (len) req.msg.rtm_family = ((len == 4) ? AF_INET : AF_INET6);
add_string_to_rtattr(&req.hdr, sizeof(req), RTA_PREFSRC, addr, len);
} else if (idx == 1) {
ok |= gtwy_ok;
if (!*++argv) show_iproute_help();
parse_prefix(addr, &netmask, &len, *argv, req.msg.rtm_family);
if (len) req.msg.rtm_family = ((len == 4) ? AF_INET : AF_INET6);
add_string_to_rtattr(&req.hdr, sizeof(req),RTA_GATEWAY, addr, len);
} else if (idx == 2) {
if (!*++argv) show_iproute_help();
if (substring_to_idx(*argv, cmd_objectlist ) == 3) {
mxlock |= (1 << RTAX_MTU);
if (!*++argv) show_iproute_help();
}
idx = atolx(*argv);
add_string_to_rtattr(&req.hdr, sizeof(req),
RTAX_MTU, (char*)&idx, sizeof(idx));
} else if (idx == 4) {
if (!*++argv) show_iproute_help();
if ((idx = idxfromRPDB(*argv,RPDB_rtprotos)) < 0)
error_exit("Invalid argument protocol %s.",*argv);
req.msg.rtm_protocol = idx;
ok |= proto_ok;
} else if (idx == 5) {
if (!*++argv) show_iproute_help();
req.msg.rtm_table = idxfromRPDB(*argv, RPDB_rttables);
} else if (idx == 6 || idx == 7) {
if (!*++argv) show_iproute_help();
d = *argv;
} else if (idx == 9) {
unsigned long metric;
unsigned int res;
char* ptr;
if (!*++argv) show_iproute_help();
metric = strtoul(*argv, &ptr, 0);
if (!(!*ptr && metric <= 0xFFFFFFFFUL))
error_exit("Invalid argument metric %s.",*argv);
else
res = metric;
add_string_to_rtattr(&req.hdr, sizeof(req),
RTA_PRIORITY, (char*)&res, sizeof(res));
} else {
if (idx == 8)
if (!*++argv) show_iproute_help();
idx = substring_to_idx(*argv,rtmtypes);
if (idx != -1) {
if (!*++argv) show_iproute_help();
req.msg.rtm_type = idx;
ok |= type_ok;
}
if (ok & dst_ok) error_exit("Duplicate argument 'to'");
parse_prefix(addr, &netmask, &len, *argv, req.msg.rtm_family);
if (len) req.msg.rtm_family = ((len == 4) ? AF_INET : AF_INET6);
req.msg.rtm_dst_len = netmask;
ok |= dst_ok;
if (len) add_string_to_rtattr(&req.hdr, sizeof(req),RTA_DST, addr, len);
}
}
if (d) {
idx = get_ifaceindex(d,1);
add_string_to_rtattr(&req.hdr, sizeof(req),
RTA_OIF, (char*)&idx, sizeof(idx));
}
if (mxrta->rta_len > RTA_LENGTH(0)) {
if (mxlock)
add_string_to_rtattr(&req.hdr, sizeof(req),
RTAX_LOCK, (char*)&mxlock, sizeof(mxlock));
add_string_to_rtattr(&req.hdr, sizeof(req),
RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
}
if (req.msg.rtm_type == RTN_LOCAL || req.msg.rtm_type == RTN_NAT)
req.msg.rtm_scope = RT_SCOPE_HOST;
else if (req.msg.rtm_type == RTN_BROADCAST||req.msg.rtm_type == RTN_MULTICAST
|| req.msg.rtm_type == RTN_ANYCAST)
req.msg.rtm_scope = RT_SCOPE_LINK;
else if (req.msg.rtm_type == RTN_UNICAST || req.msg.rtm_type == RTN_UNSPEC) {
if (TT.route_cmd == RTM_DELROUTE)
req.msg.rtm_scope = RT_SCOPE_NOWHERE;
else if (!(ok & gtwy_ok))
req.msg.rtm_scope = RT_SCOPE_LINK;
}
if (req.msg.rtm_family == AF_UNSPEC) req.msg.rtm_family = AF_INET;
send_nlmesg(0, 0, 0, &req, sizeof(req));
filter_nlmesg(NULL, NULL);
return 0;
}
static int iproute(char **argv)
{
int idx = 1;
struct arglist cmd_objectlist1[] = {{"add", 0}, {"append", 1},{"change", 2},
{"chg", 3},{"delete",4}, {"get", 5}, {"list", 6}, {"show", 7},
{"prepend", 8},{"replace", 9},{"test", 10}, {"flush", 11},{NULL,-1}};
TT.route_cmd = RTM_NEWROUTE;
switch (idx = substring_to_idx(*argv , cmd_objectlist1)) {
case 0: // add
return route_update(++argv , NLM_F_CREATE|NLM_F_EXCL);
case 1: // append
return route_update(++argv , NLM_F_CREATE|NLM_F_APPEND);
case 2: // change
case 3: // chg
return route_update(++argv , NLM_F_REPLACE);
case 4: // delete
TT.route_cmd = RTM_DELROUTE;
return route_update(++argv , RTM_DELROUTE);
case 5:
return route_get(++argv);
case 6:
case 7:
return route_show_flush(++argv);
case 8: // prepend
return route_update(++argv , NLM_F_CREATE);
case 9: // replace
return route_update(++argv , NLM_F_CREATE|NLM_F_REPLACE);
case 10: // test
return route_update(++argv , NLM_F_EXCL);
case 11: // flush
return route_show_flush(++argv);
default:
if (!*argv) return route_show_flush(argv);
else show_iproute_help();
}
return 0; // non reachable code.
}
// ===========================================================================
// code for ip rule.
// ===========================================================================
static void show_iprule_help(void)
{
char *errmsg = "usage: ip rule [ list | add | del ] SELECTOR ACTION\n"
"SELECTOR := [ from PREFIX ] [ to PREFIX ] [pref NUMBER] [ tos TOS ]\n"
" [ fwmark FWMARK] [ dev/iif STRING ] [type TYPE]\n"
"ACTION := [ table TABLE_ID ] [ realms [SRCREALM/]DSTREALM ]";
error_exit(errmsg);
}
static int ruleupdate(char **argv)
{
int8_t idx, tflag = 0, opt = (*argv[-1] == 'a') ? RTM_NEWRULE : RTM_DELRULE;
struct arglist options[] = {{"from", 0}, {"to", 1}, {"preference", 2},
{"order", 2}, {"priority", 2}, {"tos", 3}, {"dsfield", 3}, {"fwmark", 4},
{"realms", 5}, {"table", 6}, {"lookup", 6}, {"dev", 7}, {"iif", 7},
{"nat", 8}, {"map-to", 8}, {"type", 9}, {"help", 10}, {NULL, -1}};
struct {
struct nlmsghdr mhdr;
struct rtmsg msg;
char buf[1024];
} request;
memset(&request, 0, sizeof(request));
request.mhdr.nlmsg_type = opt;
request.mhdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
request.mhdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK |
((opt == RTM_DELRULE) ? 0 : NLM_F_CREATE | NLM_F_EXCL);
request.msg.rtm_family = TT.addressfamily;
request.msg.rtm_protocol = RTPROT_BOOT;
request.msg.rtm_scope = RT_SCOPE_UNIVERSE;
request.msg.rtm_table = 0;
request.msg.rtm_type = ((opt == RTM_DELRULE) ? RTN_UNSPEC : RTN_UNICAST);
for (; *argv; argv++) {
switch ((idx = substring_to_idx(*argv, options))) {
case 0:
case 1:
{ // e.g. from IP/Netmask and to IP/Netmask.
uint32_t addr[4] = {0,}, netmask = 0;
uint8_t len = 0, *tmp;
if (!*++argv) error_exit("'%s': Missing Prefix", argv[-1]);
parse_prefix(addr, &netmask, &len, *argv, request.msg.rtm_family);
tmp = idx ? &request.msg.rtm_dst_len : &request.msg.rtm_src_len;
if (!netmask) *tmp = 0;
else *tmp = netmask;
add_string_to_rtattr(&request.mhdr, sizeof(request),
(idx ? RTA_DST : RTA_SRC), addr, len);
}
break;
case 2:
case 4:
{ // e.g. Preference p# and fwmark MARK
uint32_t pref;
char *ptr;
if (!*++argv)
error_exit("Missing %s", (idx == 2) ? "Preference" : "fwmark");
pref = strtoul(*argv, &ptr, 0);
if (!ptr || (ptr == *argv) || *ptr || pref > 0xFFFFFFFFUL)
error_exit("Invalid %s", (idx == 2) ? "Preference" : "fwmark");
add_string_to_rtattr(&request.mhdr, sizeof(request),
((idx == 2) ? RTA_PRIORITY : RTA_PROTOINFO),
(void *)&pref, sizeof(uint32_t));
}
break;
case 3:
{
uint32_t tos;
if (!*++argv) error_exit("Missing TOS key");
if ((tos = idxfromRPDB(*argv, RPDB_rtdsfield)) < 0)
error_exit("Invalid TOS");
request.msg.rtm_tos = tos;
}
break;
case 5:
{ // e.g. realms FROM_realm/TO_realm
uint32_t realms = 0;
int ret;
char *ptr;
if (!*++argv) error_exit("Missing REALMSID");
if ((ptr = strchr(*argv, '/'))) {
*ptr = 0;
if ((ret = idxfromRPDB(*argv, RPDB_rtrealms)) < 0)
error_exit("Invalid realms");
realms = ret;
realms <<= 16;
*ptr++ = '/';
} else ptr = *argv;
if ((ret = idxfromRPDB(ptr, RPDB_rtrealms)) < 0)
error_exit("Invalid realms");
realms |= ret;
add_string_to_rtattr(&request.mhdr, sizeof(request),
RTA_FLOW, (void *)&realms, sizeof(uint32_t));
}
break;
case 6:
{ // e.g. table tid/tableName
int tid;
if (!*++argv) error_exit("Missing TableID");
if ((tid = idxfromRPDB(*argv, RPDB_rttables)) < 0)
error_exit("Invalid TID");
request.msg.rtm_table = tid;
tflag = 1;
}
break;
case 7:
{
if (!*++argv) error_exit("Missing dev/iif NAME");
add_string_to_rtattr(&request.mhdr, sizeof(request),
RTA_IIF, *argv, strlen(*argv)+1);
}
break;
case 8:
{
uint32_t addr[4] = {0,};
uint8_t af = AF_UNSPEC;
if (!*++argv) error_exit("Missing nat/map-to ADDRESS");
if (get_prefix(addr, &af /* Un-used variable */, *argv, AF_INET))
error_exit("Invalid mapping Address");
add_string_to_rtattr(&request.mhdr, sizeof(request),
RTA_GATEWAY, addr, sizeof(uint32_t));
request.msg.rtm_type = RTN_NAT;
}
break;
case 9:
{
if (!*++argv) error_exit("TYPE Missing");
request.msg.rtm_type = rtmtype_str2idx(*argv);
}
break;
case 10:
show_iprule_help();
break; // Unreachable code.
default:
error_exit("Invalid argument '%s'", *argv);
break; // Unreachable code.
}
}
if (!request.msg.rtm_family) request.msg.rtm_family = AF_INET;
if (!tflag && opt == RTM_NEWRULE) request.msg.rtm_table = RT_TABLE_MAIN;
send_nlmesg(0, 0, 0, &request, sizeof(request));
return (filter_nlmesg(NULL, NULL));
}
static int show_rules(struct nlmsghdr *mhdr,
char **argv __attribute__ ((__unused__)))
{
struct rtmsg *msg = NLMSG_DATA(mhdr);
struct rtattr *rta, *attr[RTA_MAX+1] = {0,};
int32_t tvar, msglen = mhdr->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg));
int hlen = ((msg->rtm_family == AF_INET) ? 32
: ((msg->rtm_family == AF_INET6) ? 128 : -1));
if (mhdr->nlmsg_type != RTM_NEWRULE) return 0;
if (msglen < 0) return 1;
tvar = msglen;
for (rta = RTM_RTA(msg); RTA_OK(rta, tvar); rta=RTA_NEXT(rta, tvar))
if (rta->rta_type <= RTA_MAX) attr[rta->rta_type] = rta;
if (tvar) error_msg("deficit %d, rtalen = %d!", tvar, rta->rta_len);
printf("%u:\tfrom ", attr[RTA_PRIORITY] ?
*(unsigned *)RTA_DATA(attr[RTA_PRIORITY]) : 0);
if (attr[RTA_SRC]) {
printf("%s", (msg->rtm_family == AF_INET || msg->rtm_family == AF_INET6)
? inet_ntop(msg->rtm_family, RTA_DATA(attr[RTA_SRC]),
toybuf, sizeof(toybuf))
: "???");
(msg->rtm_src_len != hlen) ? printf("/%u", msg->rtm_src_len) : 0;
} else msg->rtm_src_len ? printf("0/%d", msg->rtm_src_len) : printf("all");
xputc(' ');
if (attr[RTA_DST]) {
printf("to %s", (msg->rtm_family == AF_INET || msg->rtm_family == AF_INET6)
? inet_ntop(msg->rtm_family, RTA_DATA(attr[RTA_DST]),
toybuf, sizeof(toybuf)) : "???");
(msg->rtm_dst_len != hlen) ? printf("/%u", msg->rtm_dst_len) : xputc(' ');
} else if (msg->rtm_dst_len)
printf("to 0/%d ", msg->rtm_dst_len);
if (msg->rtm_tos)
printf("tos %s ", namefromRPDB(msg->rtm_tos, RPDB_rtdsfield));
if (attr[RTA_PROTOINFO])
printf("fwmark %#x ", *(uint32_t*)RTA_DATA(attr[RTA_PROTOINFO]));
if (attr[RTA_IIF]) printf("iif %s ", (char*)RTA_DATA(attr[RTA_IIF]));
if (msg->rtm_table)
printf("lookup %s ", namefromRPDB(msg->rtm_table, RPDB_rttables));
if (attr[RTA_FLOW]) {
u_int32_t from, to = *(u_int32_t *)RTA_DATA(attr[RTA_FLOW]);
char *format = "realms %s/";
to = (from = (to >> 16)) & 0xFFFF;
format = (from ? format: "%s");
printf(format, namefromRPDB((from ? from : to), RPDB_rtrealms));
}
if (msg->rtm_type == RTN_NAT) {
if (!attr[RTA_GATEWAY]) printf("masquerade");
else printf("map-to %s ", inet_ntop(msg->rtm_family,
RTA_DATA(attr[RTA_GATEWAY]), toybuf, sizeof(toybuf)));
} else if (msg->rtm_type != RTN_UNICAST)
printf("%s", rtmtype_idx2str(msg->rtm_type));
xputc('\n');
return 0;
}
static int rulelist(char **argv)
{
if (*argv) {
error_msg("'ip rule show' does not take any arguments.");
return 1;
}
send_nlmesg(RTM_GETRULE, NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST,
((TT.addressfamily != AF_UNSPEC) ? TT.addressfamily : AF_INET), NULL, 0);
return filter_nlmesg(show_rules, argv);
}
static int iprule(char **argv)
{
int idx;
struct arglist options[] = {{"add", 0}, {"delete", 0}, {"list", 1},
{"show", 1}, {NULL, -1}};
cmdobj ipcmd, cmdobjlist[] = {ruleupdate, rulelist};
if (!*argv) idx = 1;
else if ((idx = substring_to_idx(*argv++, options)) == -1)
show_iprule_help();
ipcmd = cmdobjlist[idx];
return ipcmd(argv);
}
//============================================================================
// code for ip tunnel.
//============================================================================
static void show_iptunnel_help(void)
{
char *errmsg = "usage: iptunnel { add | change | del | show } [NAME]\n"
" [mode { ipip | gre | sit }] [remote ADDR] [local ADDR]\n"
" [[i|o]seq] [[i|o]key KEY] [[i|o]csum] [ttl TTL]\n"
" [tos TOS] [[no]pmtudisc] [dev PHYS_DEV]";
error_exit(errmsg);
}
static int tnl_ioctl(char *dev, int rtype, struct ip_tunnel_parm *ptnl)
{
struct ifreq req;
int fd, ret = 0;
if ((rtype == SIOCCHGTUNNEL || rtype == SIOCDELTUNNEL) && *ptnl->name)
xstrncpy(req.ifr_name, ptnl->name, IF_NAMESIZE);
else xstrncpy(req.ifr_name, dev, IF_NAMESIZE);
if (rtype != SIOCGIFHWADDR) req.ifr_ifru.ifru_data = (void*)ptnl;
fd = xsocket(AF_INET, SOCK_DGRAM, 0);
if (rtype == SIOCGETTUNNEL) ret = ioctl(fd, rtype, &req);
else if (rtype == SIOCGIFHWADDR)
ret = (ioctl(fd, rtype, &req) < 0) ? -1 : req.ifr_addr.sa_family;
else xioctl(fd, rtype, &req);
close(fd);
return ret;
}
static int display_tunnel(struct ip_tunnel_parm *ptnl)
{
char rmt_addr[64], lcl_addr[64], ikey_str[64], okey_str[64];
printf("%s: %s/ip", ptnl->name, ptnl->iph.protocol == IPPROTO_IPIP ? "ip" :
(ptnl->iph.protocol == IPPROTO_GRE ? "gre" :
(ptnl->iph.protocol == IPPROTO_IPV6 ? "ipv6" : "unknown")));
printf(" remote %s local %s ", ptnl->iph.daddr ?
inet_ntop(AF_INET, &ptnl->iph.daddr, rmt_addr, sizeof(rmt_addr)) : "any",
ptnl->iph.saddr ? inet_ntop(AF_INET, &ptnl->iph.saddr, lcl_addr,
sizeof(lcl_addr)) : "any");
if (ptnl->link) {
struct ifreq req;
int fd;
req.ifr_ifindex = ptnl->link;
fd = xsocket(AF_INET, SOCK_DGRAM, 0);
if (ioctl(fd, SIOCGIFNAME, &req) < 0) perror_msg("SIOCGIFNAME");
else printf(" dev %s ", req.ifr_name);
close(fd);
}
if (ptnl->iph.ttl) printf(" ttl %d ", ptnl->iph.ttl);
else printf(" ttl inherit ");
if (ptnl->iph.tos) {
printf(" tos");
if (ptnl->iph.tos & 1) printf(" inherit");
if (ptnl->iph.tos & ~1) printf("%c%s ", ptnl->iph.tos & 1 ? '/' : ' ',
namefromRPDB((ptnl->iph.tos & ~1), RPDB_rtdsfield));
}
if (!(ptnl->iph.frag_off & htons(IP_DF))) printf(" nopmtudisc");
inet_ntop(AF_INET, &ptnl->i_key, ikey_str, sizeof(ikey_str));
if ((ptnl->i_flags & GRE_KEY) && (ptnl->o_flags & GRE_KEY)
&& ptnl->o_key == ptnl->i_key) printf(" key %s", ikey_str);
else if ((ptnl->i_flags | ptnl->o_flags) & GRE_KEY) {
inet_ntop(AF_INET, &ptnl->o_key, okey_str, sizeof(okey_str));
if (ptnl->i_flags & GRE_KEY) printf(" ikey %s ", ikey_str);
if (ptnl->o_flags & GRE_KEY) printf(" okey %s ", okey_str);
}
if (ptnl->i_flags & GRE_SEQ) printf("\n Drop packets out of sequence.\n");
if (ptnl->i_flags & GRE_CSUM)
printf("\n Checksum in received packet is required.");
if (ptnl->o_flags & GRE_SEQ) printf("\n Sequence packets on output.");
if (ptnl->o_flags & GRE_CSUM) printf("\n Checksum output packets.");
xputc('\n');
return 0;
}
static int read_tunnel(struct ip_tunnel_parm *ptnl)
{
int count = 0;
char iface[IF_NAMESIZE];
struct ip_tunnel_parm iptnl;
FILE *fp = xfopen("/proc/net/dev", "r");
while (fgets(toybuf, sizeof(toybuf), fp)) {
char *ptr;
int ret;
if (count++ < 2) continue; // 1st two lines are header.
ptr = strchr(toybuf, ':');
if (!ptr || (*ptr++ = 0, sscanf(toybuf, "%s", iface) != 1))
error_exit("invalid format of '/proc/net/dev'");
if (*ptnl->name && strcmp(ptnl->name, iface)) continue;
if ((ret = tnl_ioctl(iface, SIOCGIFHWADDR, &iptnl)) < 0) {
error_msg("failed to get type of '%s'", iface);
continue;
}
if (ret != ARPHRD_TUNNEL && ret != ARPHRD_SIT &&
ret != ARPHRD_IPGRE) continue;
memset(&iptnl, 0, sizeof(iptnl));
if (tnl_ioctl(iface, SIOCGETTUNNEL, &iptnl) < 0) continue;
if ((ptnl->link && iptnl.link != ptnl->link) || (*ptnl->name &&
strcmp(iptnl.name, ptnl->name)) || (ptnl->iph.daddr &&
iptnl.iph.daddr != ptnl->iph.daddr) || (ptnl->iph.saddr &&
iptnl.iph.saddr != ptnl->iph.saddr) || (ptnl->i_key &&
iptnl.i_key != ptnl->i_key)) continue;
display_tunnel(&iptnl);
}
fclose(fp);
return 0;
}
static void parse_iptunnel_args(struct ip_tunnel_parm *ptnl, char **argv,
int ipt_opt_idx)
{
int idx;
uint8_t af = AF_INET;
uint32_t addr = 0;
struct arglist opts[] = { {"mode", 0}, {"key", 1}, {"ikey", 2},
{"okey", 3}, {"seq", 4}, {"iseq", 5}, {"oseq", 6}, {"csum", 7},
{"icsum", 8}, {"ocsum", 9}, {"nopmtudisc", 10}, {"pmtudisc", 11},
{"remote", 12}, {"local", 13},{"dev", 14}, {"ttl", 15}, {"tos", 16},
{"dsfield", 17}, {"name", 18}, {NULL, -1}
};
ptnl->iph.version = 4; // The value indicates the version of IP (4 or 6)
ptnl->iph.ihl = 5; // Minimum Internet Header Length
// frag_off is measured in units of 8 octets (64 bits)
ptnl->iph.frag_off = htons(IP_DF);
if (*argv && ipt_opt_idx <= 2 && string_to_idx(*argv, opts) == -1) {
xstrncpy(ptnl->name, *argv, IF_NAMESIZE);
if (ipt_opt_idx == 1) {
struct ip_tunnel_parm iptnl_old;
memset(&iptnl_old, 0, sizeof(iptnl_old));
tnl_ioctl(ptnl->name, SIOCGETTUNNEL, &iptnl_old);
*ptnl = iptnl_old;
}
argv++;
}
for (; *argv; argv++, addr = 0) {
switch (idx = string_to_idx(*argv, opts)) {
case 0:
if (!*++argv) error_exit("mode is missing");
if ((!strcmp("ipip", *argv) || !strcmp("ip/ip", *argv)))
ptnl->iph.protocol = IPPROTO_IPIP;
else if ((!strcmp("gre", *argv) || !strcmp("gre/ip", *argv)))
ptnl->iph.protocol = IPPROTO_GRE;
else if ((!strcmp("sit", *argv) || !strcmp("ipv6/ip", *argv)))
ptnl->iph.protocol = IPPROTO_IPV6;
else show_iptunnel_help();
break;
case 1:
case 2:
case 3:
{
struct addrinfo *info, hint;
int ret;
if (!*++argv) error_exit("key value is missing");
memset(&hint, 0, sizeof(hint));
hint.ai_family = AF_INET;
ret = getaddrinfo(*argv, NULL, &hint, &info);
if (ret || !info) error_exit("invalid argument to key");
freeaddrinfo(info);
if (strchr(*argv, '.')) {
if (get_prefix(&addr, &af, *argv, AF_INET))
error_exit("invalid key '%s'", *argv);
} else {
unsigned key_val;
sscanf(*argv, "%u", &key_val);
addr = htonl(key_val);
}
if (idx == 1) {
ptnl->i_flags |= GRE_KEY;
ptnl->o_flags |= GRE_KEY;
ptnl->i_key = ptnl->o_key = addr;
} else if (idx == 2) {
ptnl->i_flags |= GRE_KEY;
ptnl->i_key = addr;
} else {
ptnl->o_flags |= GRE_KEY;
ptnl->o_key = addr;
}
}
break;
case 4:
ptnl->i_flags |= GRE_SEQ;
ptnl->o_flags |= GRE_SEQ;
break;
case 5:
ptnl->i_flags |= GRE_SEQ;
break;
case 6:
ptnl->o_flags |= GRE_SEQ;
break;
case 7:
ptnl->i_flags |= GRE_CSUM;
ptnl->o_flags |= GRE_CSUM;
break;
case 8:
ptnl->i_flags |= GRE_CSUM;
break;
case 9:
ptnl->o_flags |= GRE_CSUM;
break;
case 10:
ptnl->iph.frag_off = 0;
break;
case 11:
ptnl->iph.frag_off = htons(IP_DF);
break;
case 12:
case 13:
if (!*++argv) error_exit("remote/local address is missing");
if (get_prefix(&addr, &af, *argv, AF_INET))
error_exit("invalid remote/local address '%s'", *argv);
(idx == 12) ? (ptnl->iph.daddr = addr) : (ptnl->iph.saddr = addr);
break;
case 14:
if (!*++argv) error_exit("device name is missing");
else {
struct ifreq req;
int fd;
xstrncpy(req.ifr_name, *argv, IFNAMSIZ);
fd = xsocket(AF_INET, SOCK_DGRAM, 0);
xioctl(fd, SIOCGIFINDEX, &req);
close(fd);
ptnl->link = req.ifr_ifindex;
}
break;
case 15:
if (!*++argv) error_exit("ttl value is missing");
if (strcmp(*argv, "inherit"))
ptnl->iph.ttl = atolx_range(*argv, 0, 255);
break;
case 16:
case 17:
if (!*++argv) error_exit("tos value is missing");
if (strcmp(*argv, "inherit")) {
char *ptr;
unsigned long tval = strtoul(*argv, &ptr, 16);
if (tval > 255) error_exit("invalid tos value '%s'", *argv);
if (*ptr) {
int ret;
if ((ret = idxfromRPDB(*argv, RPDB_rtdsfield)) < 0)
error_exit("invalid tos value");
ptnl->iph.tos = ret;
} else ptnl->iph.tos = tval;
} else ptnl->iph.tos = 1;
break;
case 18:
if (*ptnl->name) error_exit("invalid tunnel");
else {
if (!*++argv) error_exit("name is missing");
xstrncpy(ptnl->name, *argv, IF_NAMESIZE);
}
break;
default:
if (*ptnl->name) error_exit("invalid tunnel");
xstrncpy(ptnl->name, *argv, IF_NAMESIZE);
break;
}
}
if (ptnl->iph.protocol == IPPROTO_IPIP ||
ptnl->iph.protocol == IPPROTO_IPV6) {
if ((ptnl->i_flags & GRE_KEY) || (ptnl->o_flags & GRE_KEY))
error_exit("[i|o]key is allowed with gre only");
if ((ptnl->i_flags & GRE_SEQ) || (ptnl->o_flags & GRE_SEQ))
error_exit("[i|o]seq is allowed with gre only");
if ((ptnl->i_flags & GRE_CSUM) || (ptnl->o_flags & GRE_CSUM))
error_exit("[i|o]csum is allowed with gre only");
}
if (!ptnl->i_key && IN_MULTICAST(ntohl(ptnl->iph.daddr))) {
ptnl->i_key = ptnl->iph.daddr;
ptnl->i_flags |= GRE_KEY;
}
if (!ptnl->o_key && IN_MULTICAST(ntohl(ptnl->iph.daddr))) {
ptnl->o_key = ptnl->iph.daddr;
ptnl->o_flags |= GRE_KEY;
}
if (IN_MULTICAST(ntohl(ptnl->iph.daddr)) && !ptnl->iph.saddr)
error_exit("broadcast tunnel requires a source address");
}
static int tunnellist(char **argv)
{
struct ip_tunnel_parm iptnl;
int ret = 0;
memset(&iptnl, 0, sizeof(iptnl));
parse_iptunnel_args(&iptnl, argv, 3);
if (iptnl.iph.protocol == IPPROTO_IPIP)
ret = tnl_ioctl(*iptnl.name ? iptnl.name : "tunl0", SIOCGETTUNNEL, &iptnl);
else if (iptnl.iph.protocol == IPPROTO_GRE)
ret = tnl_ioctl(*iptnl.name ? iptnl.name : "gre0", SIOCGETTUNNEL, &iptnl);
else if (iptnl.iph.protocol == IPPROTO_IPV6)
ret = tnl_ioctl(*iptnl.name ? iptnl.name : "sit0", SIOCGETTUNNEL, &iptnl);
else return read_tunnel(&iptnl);
if (ret < 0) {
perror_msg("SIOCGETTUNNEL");
return ret;
} else return display_tunnel(&iptnl);
}
// Performing add, change, & delete tunnel action, according to passed req_type
static int tunnelupdate(char **argv)
{
struct ip_tunnel_parm iptnl;
int idx = 2, rtype = SIOCDELTUNNEL;
if (*argv[-1] == 'a') {
idx = 0;
rtype = SIOCADDTUNNEL;
} else if (*argv[-1] == 'c') {
idx = 1;
rtype = SIOCCHGTUNNEL;
}
memset(&iptnl, 0, sizeof(iptnl));
parse_iptunnel_args(&iptnl, argv, idx);
if (idx != 2 && iptnl.iph.ttl && !(iptnl.iph.frag_off))
error_exit("ttl > 0 and nopmtudisc are incompatible");
if (iptnl.iph.protocol == IPPROTO_IPIP)
return (tnl_ioctl("tunl0", rtype, &iptnl) < 0) ? 1 : 0;
else if (iptnl.iph.protocol == IPPROTO_GRE)
return (tnl_ioctl("gre0", rtype, &iptnl) < 0) ? 1 : 0;
else if (iptnl.iph.protocol == IPPROTO_IPV6)
return (tnl_ioctl("sit0", rtype, &iptnl) < 0) ? 1 : 0;
else {
if (idx != 2) error_exit("invalid tunnel mode");
return (tnl_ioctl(iptnl.name, rtype, &iptnl) < 0) ? 1 : 0;
}
}
static int iptunnel(char **argv)
{
int idx;
struct arglist opts[] = {{"add", 0}, {"change", 0}, {"del", 0},
{"delete", 0}, {"show", 1}, {"list", 1}, {"lst", 1}, {NULL, -1}
};
cmdobj ipcmd, cmdobjlist[] = {tunnelupdate, tunnellist};
if (!*argv) idx = 1;
else if ((idx = substring_to_idx(*argv++, opts)) == -1)
show_iptunnel_help();
ipcmd = cmdobjlist[idx];
return ipcmd(argv);
}
// ===========================================================================
// Common code, which is used for all ip options.
// ===========================================================================
// Parse netlink messages and call input callback handler for action
static int filter_nlmesg(int (*fun)(struct nlmsghdr *mhdr, char **argv),
char **argv)
{
while (1) {
struct nlmsghdr *mhdr;
int msglen = recv(TT.sockfd, TT.gbuf, MESG_LEN, 0);
if ((msglen < 0) && (errno == EINTR || errno == EAGAIN)) continue;
else if (msglen < 0) {
error_msg("netlink receive error %s", strerror(errno));
return 1;
} else if (!msglen) {
error_msg("EOF on netlink");
return 1;
}
for (mhdr = (struct nlmsghdr*)TT.gbuf; NLMSG_OK(mhdr, msglen);
mhdr = NLMSG_NEXT(mhdr, msglen)) {
int err;
if (mhdr->nlmsg_pid != getpid())
continue;
switch (mhdr->nlmsg_type) {
case NLMSG_DONE:
return 0;
case NLMSG_ERROR:
{
struct nlmsgerr *merr = (struct nlmsgerr*)NLMSG_DATA(mhdr);
if (merr->error == 0) return 0;
if (mhdr->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr)))
error_msg("ERROR truncated");
else {
errno = -merr->error;
perror_msg("RTNETLINK answers");
}
return 1;
}
default:
if (fun && (err = fun(mhdr, argv))) return err;
break;
}
} // End of for loop.
} // End of while loop.
return 0;
}
void ip_main(void)
{
char **optargv = toys.argv;
int idx, isip = !(toys.which->name[2]); //1 -> if only ip
cmdobj ipcmd, cmdobjlist[] = {ipaddr, iplink, iproute, iprule, iptunnel};
for (++optargv; *optargv; ++optargv) {
char *ptr = *optargv;
struct arglist ip_options[] = {{"oneline", 0}, {"family", 1},
{"4", 1}, {"6", 1}, {"0", 1}, {"stats", 2}, {NULL, -1}};
if (*ptr != '-') break;
else if ((*(ptr+1) == '-') && (*(ptr+2))) ptr +=2;
//escape "--" and stop ip arg parsing.
else if ((*(ptr+1) == '-') && (!*(ptr+2))) {
*ptr +=1;
break;
} else ptr +=1;
switch (substring_to_idx(ptr, ip_options)) {
case 0: TT.singleline = 1;
break;
case 1: {
if (isdigit(*ptr)) {
long num = atolx(ptr);
if (num == 4) TT.addressfamily = AF_INET;
else if (num == 6) TT.addressfamily = AF_INET6;
else TT.addressfamily = AF_PACKET;
} else {
struct arglist ip_aflist[] = {{"inet", AF_INET},
{"inet6", AF_INET6}, {"link", AF_PACKET}, {NULL, -1}};
if (!*++optargv) help_exit(0);
if ((TT.addressfamily = string_to_idx(*optargv, ip_aflist)) == -1)
error_exit("wrong family '%s'", *optargv);
}
}
break;
case 2:
TT.stats++;
break;
default: help_exit(0);
break; // unreachable code.
}
}
TT.sockfd = xsocket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (isip) {// only for ip
if (*optargv) {
struct arglist ip_objectlist[] = { {"address", 0}, {"link", 1},
{"route", 2}, {"rule", 3}, {"tunnel", 4}, {"tunl", 4}, {NULL, -1}};
if ((idx = substring_to_idx(*optargv, ip_objectlist)) == -1) help_exit(0);
ipcmd = cmdobjlist[idx];
toys.exitval = ipcmd(++optargv);
} else help_exit(0);
} else {
struct arglist ip_objectlist[] = { {"ipaddr", 0}, {"iplink", 1},
{"iproute", 2}, {"iprule", 3}, {"iptunnel", 4}, {NULL, -1}};
if ((idx = string_to_idx(toys.which->name, ip_objectlist)) == -1)
help_exit(0);
ipcmd = cmdobjlist[idx];
toys.exitval = ipcmd(optargv);
}
xclose(TT.sockfd);
if (rtdsfield_init) free_alist(rt_dsfield);
if (rtrealms_init) free_alist(rt_realms);
if (rtscope_init) free_alist(rt_scope);
if (rttable_init) free_alist(rt_tables);
if (rtprotos_init) free_alist(rt_protos);
}