/*
* utils.c
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <unistd.h>
#include <syslog.h>
#include <fcntl.h>
#include <limits.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#include <ctype.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <asm/types.h>
#include <linux/pkt_sched.h>
#include <linux/param.h>
#include <linux/if_arp.h>
#include <linux/mpls.h>
#include <time.h>
#include <sys/time.h>
#include <errno.h>
#include "rt_names.h"
#include "utils.h"
#include "namespace.h"
int resolve_hosts;
int timestamp_short;
int get_hex(char c)
{
if (c >= 'A' && c <= 'F')
return c - 'A' + 10;
if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
if (c >= '0' && c <= '9')
return c - '0';
return -1;
}
int get_integer(int *val, const char *arg, int base)
{
long res;
char *ptr;
if (!arg || !*arg)
return -1;
res = strtol(arg, &ptr, base);
/* If there were no digits at all, strtol() stores
* the original value of nptr in *endptr (and returns 0).
* In particular, if *nptr is not '\0' but **endptr is '\0' on return,
* the entire string is valid.
*/
if (!ptr || ptr == arg || *ptr)
return -1;
/* If an underflow occurs, strtol() returns LONG_MIN.
* If an overflow occurs, strtol() returns LONG_MAX.
* In both cases, errno is set to ERANGE.
*/
if ((res == LONG_MAX || res == LONG_MIN) && errno == ERANGE)
return -1;
/* Outside range of int */
if (res < INT_MIN || res > INT_MAX)
return -1;
*val = res;
return 0;
}
int mask2bits(__u32 netmask)
{
unsigned int bits = 0;
__u32 mask = ntohl(netmask);
__u32 host = ~mask;
/* a valid netmask must be 2^n - 1 */
if ((host & (host + 1)) != 0)
return -1;
for (; mask; mask <<= 1)
++bits;
return bits;
}
static int get_netmask(unsigned int *val, const char *arg, int base)
{
inet_prefix addr;
if (!get_unsigned(val, arg, base))
return 0;
/* try coverting dotted quad to CIDR */
if (!get_addr_1(&addr, arg, AF_INET) && addr.family == AF_INET) {
int b = mask2bits(addr.data[0]);
if (b >= 0) {
*val = b;
return 0;
}
}
return -1;
}
int get_unsigned(unsigned int *val, const char *arg, int base)
{
unsigned long res;
char *ptr;
if (!arg || !*arg)
return -1;
res = strtoul(arg, &ptr, base);
/* empty string or trailing non-digits */
if (!ptr || ptr == arg || *ptr)
return -1;
/* overflow */
if (res == ULONG_MAX && errno == ERANGE)
return -1;
/* out side range of unsigned */
if (res > UINT_MAX)
return -1;
*val = res;
return 0;
}
/*
* get_time_rtt is "translated" from a similar routine "get_time" in
* tc_util.c. We don't use the exact same routine because tc passes
* microseconds to the kernel and the callers of get_time_rtt want to
* pass milliseconds (standard unit for rtt values since 2.6.27), and
* have a different assumption for the units of a "raw" number.
*/
int get_time_rtt(unsigned int *val, const char *arg, int *raw)
{
double t;
unsigned long res;
char *p;
if (strchr(arg, '.') != NULL) {
t = strtod(arg, &p);
if (t < 0.0)
return -1;
/* no digits? */
if (!p || p == arg)
return -1;
/* over/underflow */
if ((t == HUGE_VALF || t == HUGE_VALL) && errno == ERANGE)
return -1;
} else {
res = strtoul(arg, &p, 0);
/* empty string? */
if (!p || p == arg)
return -1;
/* overflow */
if (res == ULONG_MAX && errno == ERANGE)
return -1;
t = (double)res;
}
if (p == arg)
return -1;
*raw = 1;
if (*p) {
*raw = 0;
if (strcasecmp(p, "s") == 0 ||
strcasecmp(p, "sec") == 0 ||
strcasecmp(p, "secs") == 0)
t *= 1000;
else if (strcasecmp(p, "ms") == 0 ||
strcasecmp(p, "msec") == 0 ||
strcasecmp(p, "msecs") == 0)
t *= 1.0; /* allow suffix, do nothing */
else
return -1;
}
/* emulate ceil() without having to bring-in -lm and always be >= 1 */
*val = t;
if (*val < t)
*val += 1;
return 0;
}
int get_u64(__u64 *val, const char *arg, int base)
{
unsigned long long res;
char *ptr;
if (!arg || !*arg)
return -1;
res = strtoull(arg, &ptr, base);
/* empty string or trailing non-digits */
if (!ptr || ptr == arg || *ptr)
return -1;
/* overflow */
if (res == ULLONG_MAX && errno == ERANGE)
return -1;
/* in case ULL is 128 bits */
if (res > 0xFFFFFFFFFFFFFFFFULL)
return -1;
*val = res;
return 0;
}
int get_u32(__u32 *val, const char *arg, int base)
{
unsigned long res;
char *ptr;
if (!arg || !*arg)
return -1;
res = strtoul(arg, &ptr, base);
/* empty string or trailing non-digits */
if (!ptr || ptr == arg || *ptr)
return -1;
/* overflow */
if (res == ULONG_MAX && errno == ERANGE)
return -1;
/* in case UL > 32 bits */
if (res > 0xFFFFFFFFUL)
return -1;
*val = res;
return 0;
}
int get_u16(__u16 *val, const char *arg, int base)
{
unsigned long res;
char *ptr;
if (!arg || !*arg)
return -1;
res = strtoul(arg, &ptr, base);
/* empty string or trailing non-digits */
if (!ptr || ptr == arg || *ptr)
return -1;
/* overflow */
if (res == ULONG_MAX && errno == ERANGE)
return -1;
if (res > 0xFFFFUL)
return -1;
*val = res;
return 0;
}
int get_u8(__u8 *val, const char *arg, int base)
{
unsigned long res;
char *ptr;
if (!arg || !*arg)
return -1;
res = strtoul(arg, &ptr, base);
/* empty string or trailing non-digits */
if (!ptr || ptr == arg || *ptr)
return -1;
/* overflow */
if (res == ULONG_MAX && errno == ERANGE)
return -1;
if (res > 0xFFUL)
return -1;
*val = res;
return 0;
}
int get_s32(__s32 *val, const char *arg, int base)
{
long res;
char *ptr;
errno = 0;
if (!arg || !*arg)
return -1;
res = strtol(arg, &ptr, base);
if (!ptr || ptr == arg || *ptr)
return -1;
if ((res == LONG_MIN || res == LONG_MAX) && errno == ERANGE)
return -1;
if (res > INT32_MAX || res < INT32_MIN)
return -1;
*val = res;
return 0;
}
int get_s16(__s16 *val, const char *arg, int base)
{
long res;
char *ptr;
if (!arg || !*arg)
return -1;
res = strtol(arg, &ptr, base);
if (!ptr || ptr == arg || *ptr)
return -1;
if ((res == LONG_MIN || res == LONG_MAX) && errno == ERANGE)
return -1;
if (res > 0x7FFF || res < -0x8000)
return -1;
*val = res;
return 0;
}
int get_s8(__s8 *val, const char *arg, int base)
{
long res;
char *ptr;
if (!arg || !*arg)
return -1;
res = strtol(arg, &ptr, base);
if (!ptr || ptr == arg || *ptr)
return -1;
if ((res == LONG_MIN || res == LONG_MAX) && errno == ERANGE)
return -1;
if (res > 0x7F || res < -0x80)
return -1;
*val = res;
return 0;
}
int get_be64(__be64 *val, const char *arg, int base)
{
__u64 v;
int ret = get_u64(&v, arg, base);
if (!ret)
*val = htonll(v);
return ret;
}
int get_be32(__be32 *val, const char *arg, int base)
{
__u32 v;
int ret = get_u32(&v, arg, base);
if (!ret)
*val = htonl(v);
return ret;
}
int get_be16(__be16 *val, const char *arg, int base)
{
__u16 v;
int ret = get_u16(&v, arg, base);
if (!ret)
*val = htons(v);
return ret;
}
/* This uses a non-standard parsing (ie not inet_aton, or inet_pton)
* because of legacy choice to parse 10.8 as 10.8.0.0 not 10.0.0.8
*/
static int get_addr_ipv4(__u8 *ap, const char *cp)
{
int i;
for (i = 0; i < 4; i++) {
unsigned long n;
char *endp;
n = strtoul(cp, &endp, 0);
if (n > 255)
return -1; /* bogus network value */
if (endp == cp) /* no digits */
return -1;
ap[i] = n;
if (*endp == '\0')
break;
if (i == 3 || *endp != '.')
return -1; /* extra characters */
cp = endp + 1;
}
return 1;
}
int get_addr64(__u64 *ap, const char *cp)
{
int i;
union {
__u16 v16[4];
__u64 v64;
} val;
for (i = 0; i < 4; i++) {
unsigned long n;
char *endp;
n = strtoul(cp, &endp, 16);
if (n > 0xffff)
return -1; /* bogus network value */
if (endp == cp) /* no digits */
return -1;
val.v16[i] = htons(n);
if (*endp == '\0')
break;
if (i == 3 || *endp != ':')
return -1; /* extra characters */
cp = endp + 1;
}
*ap = val.v64;
return 1;
}
int get_addr_1(inet_prefix *addr, const char *name, int family)
{
memset(addr, 0, sizeof(*addr));
if (strcmp(name, "default") == 0 ||
strcmp(name, "all") == 0 ||
strcmp(name, "any") == 0) {
if ((family == AF_DECnet) || (family == AF_MPLS))
return -1;
addr->family = family;
addr->bytelen = (family == AF_INET6 ? 16 : 4);
addr->bitlen = -1;
return 0;
}
if (family == AF_PACKET) {
int len;
len = ll_addr_a2n((char *) &addr->data, sizeof(addr->data),
name);
if (len < 0)
return -1;
addr->family = AF_PACKET;
addr->bytelen = len;
addr->bitlen = len * 8;
return 0;
}
if (strchr(name, ':')) {
addr->family = AF_INET6;
if (family != AF_UNSPEC && family != AF_INET6)
return -1;
if (inet_pton(AF_INET6, name, addr->data) <= 0)
return -1;
addr->bytelen = 16;
addr->bitlen = -1;
return 0;
}
#ifndef ANDROID
if (family == AF_DECnet) {
struct dn_naddr dna;
addr->family = AF_DECnet;
if (dnet_pton(AF_DECnet, name, &dna) <= 0)
return -1;
memcpy(addr->data, dna.a_addr, 2);
addr->bytelen = 2;
addr->bitlen = -1;
return 0;
}
#endif
if (family == AF_MPLS) {
unsigned int maxlabels;
int i;
addr->family = AF_MPLS;
if (mpls_pton(AF_MPLS, name, addr->data,
sizeof(addr->data)) <= 0)
return -1;
addr->bytelen = 4;
addr->bitlen = 20;
/* How many bytes do I need? */
maxlabels = sizeof(addr->data) / sizeof(struct mpls_label);
for (i = 0; i < maxlabels; i++) {
if (ntohl(addr->data[i]) & MPLS_LS_S_MASK) {
addr->bytelen = (i + 1)*4;
break;
}
}
return 0;
}
addr->family = AF_INET;
if (family != AF_UNSPEC && family != AF_INET)
return -1;
if (get_addr_ipv4((__u8 *)addr->data, name) <= 0)
return -1;
addr->bytelen = 4;
addr->bitlen = -1;
return 0;
}
int af_bit_len(int af)
{
switch (af) {
case AF_INET6:
return 128;
case AF_INET:
return 32;
case AF_DECnet:
return 16;
case AF_IPX:
return 80;
case AF_MPLS:
return 20;
}
return 0;
}
int af_byte_len(int af)
{
return af_bit_len(af) / 8;
}
int get_prefix_1(inet_prefix *dst, char *arg, int family)
{
int err;
unsigned int plen;
char *slash;
memset(dst, 0, sizeof(*dst));
if (strcmp(arg, "default") == 0 ||
strcmp(arg, "any") == 0 ||
strcmp(arg, "all") == 0) {
if ((family == AF_DECnet) || (family == AF_MPLS))
return -1;
dst->family = family;
dst->bytelen = 0;
dst->bitlen = 0;
return 0;
}
slash = strchr(arg, '/');
if (slash)
*slash = 0;
err = get_addr_1(dst, arg, family);
if (err == 0) {
dst->bitlen = af_bit_len(dst->family);
if (slash) {
if (get_netmask(&plen, slash+1, 0)
|| plen > dst->bitlen) {
err = -1;
goto done;
}
dst->flags |= PREFIXLEN_SPECIFIED;
dst->bitlen = plen;
}
}
done:
if (slash)
*slash = '/';
return err;
}
static const char *family_name_verbose(int family)
{
if (family == AF_UNSPEC)
return "any valid";
return family_name(family);
}
int get_addr(inet_prefix *dst, const char *arg, int family)
{
if (get_addr_1(dst, arg, family)) {
fprintf(stderr,
"Error: %s address is expected rather than \"%s\".\n",
family_name_verbose(family), arg);
exit(1);
}
return 0;
}
int get_prefix(inet_prefix *dst, char *arg, int family)
{
if (family == AF_PACKET) {
fprintf(stderr,
"Error: \"%s\" may be inet prefix, but it is not allowed in this context.\n",
arg);
exit(1);
}
if (get_prefix_1(dst, arg, family)) {
fprintf(stderr,
"Error: %s prefix is expected rather than \"%s\".\n",
family_name_verbose(family), arg);
exit(1);
}
return 0;
}
__u32 get_addr32(const char *name)
{
inet_prefix addr;
if (get_addr_1(&addr, name, AF_INET)) {
fprintf(stderr,
"Error: an IP address is expected rather than \"%s\"\n",
name);
exit(1);
}
return addr.data[0];
}
void incomplete_command(void)
{
fprintf(stderr, "Command line is not complete. Try option \"help\"\n");
exit(-1);
}
void missarg(const char *key)
{
fprintf(stderr, "Error: argument \"%s\" is required\n", key);
exit(-1);
}
void invarg(const char *msg, const char *arg)
{
fprintf(stderr, "Error: argument \"%s\" is wrong: %s\n", arg, msg);
exit(-1);
}
void duparg(const char *key, const char *arg)
{
fprintf(stderr,
"Error: duplicate \"%s\": \"%s\" is the second value.\n",
key, arg);
exit(-1);
}
void duparg2(const char *key, const char *arg)
{
fprintf(stderr,
"Error: either \"%s\" is duplicate, or \"%s\" is a garbage.\n",
key, arg);
exit(-1);
}
int check_ifname(const char *name)
{
/* These checks mimic kernel checks in dev_valid_name */
if (*name == '\0')
return -1;
if (strlen(name) >= IFNAMSIZ)
return -1;
while (*name) {
if (*name == '/' || isspace(*name))
return -1;
++name;
}
return 0;
}
/* buf is assumed to be IFNAMSIZ */
int get_ifname(char *buf, const char *name)
{
int ret;
ret = check_ifname(name);
if (ret == 0)
strncpy(buf, name, IFNAMSIZ);
return ret;
}
int matches(const char *cmd, const char *pattern)
{
int len = strlen(cmd);
if (len > strlen(pattern))
return -1;
return memcmp(pattern, cmd, len);
}
int inet_addr_match(const inet_prefix *a, const inet_prefix *b, int bits)
{
const __u32 *a1 = a->data;
const __u32 *a2 = b->data;
int words = bits >> 0x05;
bits &= 0x1f;
if (words)
if (memcmp(a1, a2, words << 2))
return -1;
if (bits) {
__u32 w1, w2;
__u32 mask;
w1 = a1[words];
w2 = a2[words];
mask = htonl((0xffffffff) << (0x20 - bits));
if ((w1 ^ w2) & mask)
return 1;
}
return 0;
}
int __iproute2_hz_internal;
int __get_hz(void)
{
char name[1024];
int hz = 0;
FILE *fp;
if (getenv("HZ"))
return atoi(getenv("HZ")) ? : HZ;
if (getenv("PROC_NET_PSCHED"))
snprintf(name, sizeof(name)-1,
"%s", getenv("PROC_NET_PSCHED"));
else if (getenv("PROC_ROOT"))
snprintf(name, sizeof(name)-1,
"%s/net/psched", getenv("PROC_ROOT"));
else
strcpy(name, "/proc/net/psched");
fp = fopen(name, "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)
return hz;
return HZ;
}
int __iproute2_user_hz_internal;
int __get_user_hz(void)
{
return sysconf(_SC_CLK_TCK);
}
const char *rt_addr_n2a_r(int af, int len,
const void *addr, char *buf, int buflen)
{
switch (af) {
case AF_INET:
case AF_INET6:
return inet_ntop(af, addr, buf, buflen);
#ifndef ANDROID
case AF_MPLS:
return mpls_ntop(af, addr, buf, buflen);
case AF_IPX:
return ipx_ntop(af, addr, buf, buflen);
case AF_DECnet:
{
struct dn_naddr dna = { 2, { 0, 0, } };
memcpy(dna.a_addr, addr, 2);
return dnet_ntop(af, &dna, buf, buflen);
}
#endif
case AF_PACKET:
return ll_addr_n2a(addr, len, ARPHRD_VOID, buf, buflen);
default:
return "???";
}
}
const char *rt_addr_n2a(int af, int len, const void *addr)
{
static char buf[256];
return rt_addr_n2a_r(af, len, addr, buf, 256);
}
int read_family(const char *name)
{
int family = AF_UNSPEC;
if (strcmp(name, "inet") == 0)
family = AF_INET;
else if (strcmp(name, "inet6") == 0)
family = AF_INET6;
else if (strcmp(name, "dnet") == 0)
family = AF_DECnet;
else if (strcmp(name, "link") == 0)
family = AF_PACKET;
else if (strcmp(name, "ipx") == 0)
family = AF_IPX;
else if (strcmp(name, "mpls") == 0)
family = AF_MPLS;
else if (strcmp(name, "bridge") == 0)
family = AF_BRIDGE;
return family;
}
const char *family_name(int family)
{
if (family == AF_INET)
return "inet";
if (family == AF_INET6)
return "inet6";
if (family == AF_DECnet)
return "dnet";
if (family == AF_PACKET)
return "link";
if (family == AF_IPX)
return "ipx";
if (family == AF_MPLS)
return "mpls";
if (family == AF_BRIDGE)
return "bridge";
return "???";
}
#ifdef RESOLVE_HOSTNAMES
struct namerec {
struct namerec *next;
const char *name;
inet_prefix addr;
};
#define NHASH 257
static struct namerec *nht[NHASH];
static const char *resolve_address(const void *addr, int len, int af)
{
struct namerec *n;
struct hostent *h_ent;
unsigned int hash;
static int notfirst;
if (af == AF_INET6 && ((__u32 *)addr)[0] == 0 &&
((__u32 *)addr)[1] == 0 && ((__u32 *)addr)[2] == htonl(0xffff)) {
af = AF_INET;
addr += 12;
len = 4;
}
hash = *(__u32 *)(addr + len - 4) % NHASH;
for (n = nht[hash]; n; n = n->next) {
if (n->addr.family == af &&
n->addr.bytelen == len &&
memcmp(n->addr.data, addr, len) == 0)
return n->name;
}
n = malloc(sizeof(*n));
if (n == NULL)
return NULL;
n->addr.family = af;
n->addr.bytelen = len;
n->name = NULL;
memcpy(n->addr.data, addr, len);
n->next = nht[hash];
nht[hash] = n;
if (++notfirst == 1)
sethostent(1);
fflush(stdout);
h_ent = gethostbyaddr(addr, len, af);
if (h_ent != NULL)
n->name = strdup(h_ent->h_name);
/* Even if we fail, "negative" entry is remembered. */
return n->name;
}
#endif
const char *format_host_r(int af, int len, const void *addr,
char *buf, int buflen)
{
#ifdef RESOLVE_HOSTNAMES
if (resolve_hosts) {
const char *n;
len = len <= 0 ? af_byte_len(af) : len;
if (len > 0 &&
(n = resolve_address(addr, len, af)) != NULL)
return n;
}
#endif
return rt_addr_n2a_r(af, len, addr, buf, buflen);
}
const char *format_host(int af, int len, const void *addr)
{
static char buf[256];
return format_host_r(af, len, addr, buf, 256);
}
char *hexstring_n2a(const __u8 *str, int len, char *buf, int blen)
{
char *ptr = buf;
int i;
for (i = 0; i < len; i++) {
if (blen < 3)
break;
sprintf(ptr, "%02x", str[i]);
ptr += 2;
blen -= 2;
}
return buf;
}
__u8 *hexstring_a2n(const char *str, __u8 *buf, int blen, unsigned int *len)
{
unsigned int cnt = 0;
char *endptr;
if (strlen(str) % 2)
return NULL;
while (cnt < blen && strlen(str) > 1) {
unsigned int tmp;
char tmpstr[3];
strncpy(tmpstr, str, 2);
tmpstr[2] = '\0';
errno = 0;
tmp = strtoul(tmpstr, &endptr, 16);
if (errno != 0 || tmp > 0xFF || *endptr != '\0')
return NULL;
buf[cnt++] = tmp;
str += 2;
}
if (len)
*len = cnt;
return buf;
}
int hex2mem(const char *buf, uint8_t *mem, int count)
{
int i, j;
int c;
for (i = 0, j = 0; i < count; i++, j += 2) {
c = get_hex(buf[j]);
if (c < 0)
return -1;
mem[i] = c << 4;
c = get_hex(buf[j + 1]);
if (c < 0)
return -1;
mem[i] |= c;
}
return 0;
}
int addr64_n2a(__u64 addr, char *buff, size_t len)
{
__u16 *words = (__u16 *)&addr;
__u16 v;
int i, ret;
size_t written = 0;
char *sep = ":";
for (i = 0; i < 4; i++) {
v = ntohs(words[i]);
if (i == 3)
sep = "";
ret = snprintf(&buff[written], len - written, "%x%s", v, sep);
if (ret < 0)
return ret;
written += ret;
}
return written;
}
/* Print buffer and escape bytes that are !isprint or among 'escape' */
void print_escape_buf(const __u8 *buf, size_t len, const char *escape)
{
size_t i;
for (i = 0; i < len; ++i) {
if (isprint(buf[i]) && buf[i] != '\\' &&
!strchr(escape, buf[i]))
printf("%c", buf[i]);
else
printf("\\%03o", buf[i]);
}
}
int print_timestamp(FILE *fp)
{
struct timeval tv;
struct tm *tm;
gettimeofday(&tv, NULL);
tm = localtime(&tv.tv_sec);
if (timestamp_short) {
char tshort[40];
strftime(tshort, sizeof(tshort), "%Y-%m-%dT%H:%M:%S", tm);
fprintf(fp, "[%s.%06ld] ", tshort, tv.tv_usec);
} else {
char *tstr = asctime(tm);
tstr[strlen(tstr)-1] = 0;
fprintf(fp, "Timestamp: %s %ld usec\n",
tstr, tv.tv_usec);
}
return 0;
}
int cmdlineno;
/* Like glibc getline but handle continuation lines and comments */
ssize_t getcmdline(char **linep, size_t *lenp, FILE *in)
{
ssize_t cc;
char *cp;
cc = getline(linep, lenp, in);
if (cc < 0)
return cc; /* eof or error */
++cmdlineno;
cp = strchr(*linep, '#');
if (cp)
*cp = '\0';
while ((cp = strstr(*linep, "\\\n")) != NULL) {
char *line1 = NULL;
size_t len1 = 0;
ssize_t cc1;
cc1 = getline(&line1, &len1, in);
if (cc1 < 0) {
fprintf(stderr, "Missing continuation line\n");
return cc1;
}
++cmdlineno;
*cp = 0;
cp = strchr(line1, '#');
if (cp)
*cp = '\0';
*lenp = strlen(*linep) + strlen(line1) + 1;
*linep = realloc(*linep, *lenp);
if (!*linep) {
fprintf(stderr, "Out of memory\n");
*lenp = 0;
return -1;
}
cc += cc1 - 2;
strcat(*linep, line1);
free(line1);
}
return cc;
}
/* split command line into argument vector */
int makeargs(char *line, char *argv[], int maxargs)
{
static const char ws[] = " \t\r\n";
char *cp;
int argc = 0;
for (cp = line + strspn(line, ws); *cp; cp += strspn(cp, ws)) {
if (argc >= (maxargs - 1)) {
fprintf(stderr, "Too many arguments to command\n");
exit(1);
}
/* word begins with quote */
if (*cp == '\'' || *cp == '"') {
char quote = *cp++;
argv[argc++] = cp;
/* find ending quote */
cp = strchr(cp, quote);
if (cp == NULL) {
fprintf(stderr, "Unterminated quoted string\n");
exit(1);
}
*cp++ = 0;
continue;
}
argv[argc++] = cp;
/* find end of word */
cp += strcspn(cp, ws);
*cp++ = 0;
}
argv[argc] = NULL;
return argc;
}
int inet_get_addr(const char *src, __u32 *dst, struct in6_addr *dst6)
{
if (strchr(src, ':'))
return inet_pton(AF_INET6, src, dst6);
else
return inet_pton(AF_INET, src, dst);
}
void print_nlmsg_timestamp(FILE *fp, const struct nlmsghdr *n)
{
char *tstr;
time_t secs = ((__u32 *)NLMSG_DATA(n))[0];
long usecs = ((__u32 *)NLMSG_DATA(n))[1];
tstr = asctime(localtime(&secs));
tstr[strlen(tstr)-1] = 0;
fprintf(fp, "Timestamp: %s %lu us\n", tstr, usecs);
}
static int on_netns(char *nsname, void *arg)
{
struct netns_func *f = arg;
if (netns_switch(nsname))
return -1;
return f->func(nsname, f->arg);
}
static int on_netns_label(char *nsname, void *arg)
{
printf("\nnetns: %s\n", nsname);
return on_netns(nsname, arg);
}
int do_each_netns(int (*func)(char *nsname, void *arg), void *arg,
bool show_label)
{
struct netns_func nsf = { .func = func, .arg = arg };
if (show_label)
return netns_foreach(on_netns_label, &nsf);
return netns_foreach(on_netns, &nsf);
}
char *int_to_str(int val, char *buf)
{
sprintf(buf, "%d", val);
return buf;
}
int get_guid(__u64 *guid, const char *arg)
{
unsigned long int tmp;
char *endptr;
int i;
#define GUID_STR_LEN 23
/* Verify strict format: format string must be
* xx:xx:xx:xx:xx:xx:xx:xx where xx can be an arbitrary
* hex digit
*/
if (strlen(arg) != GUID_STR_LEN)
return -1;
/* make sure columns are in place */
for (i = 0; i < 7; i++)
if (arg[2 + i * 3] != ':')
return -1;
*guid = 0;
for (i = 0; i < 8; i++) {
tmp = strtoul(arg + i * 3, &endptr, 16);
if (endptr != arg + i * 3 + 2)
return -1;
if (tmp > 255)
return -1;
*guid |= tmp << (56 - 8 * i);
}
return 0;
}
/* This is a necessary workaround for multicast route dumps */
int get_real_family(int rtm_type, int rtm_family)
{
if (rtm_type != RTN_MULTICAST)
return rtm_family;
if (rtm_family == RTNL_FAMILY_IPMR)
return AF_INET;
if (rtm_family == RTNL_FAMILY_IP6MR)
return AF_INET6;
return rtm_family;
}
#ifdef NEED_STRLCPY
size_t strlcpy(char *dst, const char *src, size_t size)
{
size_t srclen = strlen(src);
if (size) {
size_t minlen = min(srclen, size - 1);
memcpy(dst, src, minlen);
dst[minlen] = '\0';
}
return srclen;
}
size_t strlcat(char *dst, const char *src, size_t size)
{
size_t dlen = strlen(dst);
if (dlen >= size)
return dlen + strlen(src);
return dlen + strlcpy(dst + dlen, src, size - dlen);
}
#endif