[mirror_iproute2.git] / lib / utils.c

/*
 * 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 <netdb.h>
#include <arpa/inet.h>
#include <asm/types.h>
#include <linux/pkt_sched.h>
#include <linux/param.h>
#include <time.h>
#include <sys/time.h>
#include <errno.h>


#include "utils.h"

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 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 *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 *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 *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;

		/* extra non-digits */
		if (!p || p == arg || *p)
			return -1;

		/* over/underflow */
		if ((t == HUGE_VALF || t == HUGE_VALL) && errno == ERANGE)
			return -1;
	} else {
		res = strtoul(arg, &p, 0);

		/* empty string or trailing non-digits */
		if (!p || p == arg || *p)
			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;
}

/* 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_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)
			return -1;
		addr->family = family;
		addr->bytelen = (family == AF_INET6 ? 16 : 4);
		addr->bitlen = -1;
		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;
	}

	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;
	}

	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 get_prefix_1(inet_prefix *dst, char *arg, int family)
{
	int err;
	unsigned 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)
			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) {
		switch(dst->family) {
			case AF_INET6:
				dst->bitlen = 128;
				break;
			case AF_DECnet:
				dst->bitlen = 16;
				break;
			default:
			case AF_INET:
				dst->bitlen = 32;
		}
		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;
}

int get_addr(inet_prefix *dst, const char *arg, int family)
{
	if (family == AF_PACKET) {
		fprintf(stderr, "Error: \"%s\" may be inet address, but it is not allowed in this context.\n", arg);
		exit(1);
	}
	if (get_addr_1(dst, arg, family)) {
		fprintf(stderr, "Error: an inet address is expected rather than \"%s\".\n", 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: an inet prefix is expected rather than \"%s\".\n", 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 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 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(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);
	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);
	}
	default:
		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 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;
	}
	if ((n = malloc(sizeof(*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);

	if ((h_ent = gethostbyaddr(addr, len, af)) != NULL)
		n->name = strdup(h_ent->h_name);

	/* Even if we fail, "negative" entry is remembered. */
	return n->name;
}
#endif


const char *format_host(int af, int len, const void *addr,
			char *buf, int buflen)
{
#ifdef RESOLVE_HOSTNAMES
	if (resolve_hosts) {
		const char *n;

		if (len <= 0) {
			switch (af) {
			case AF_INET:
				len = 4;
				break;
			case AF_INET6:
				len = 16;
				break;
			case AF_IPX:
				len = 10;
				break;
#ifdef AF_DECnet
			/* I see no reasons why gethostbyname
			   may not work for DECnet */
			case AF_DECnet:
				len = 2;
				break;
#endif
			default: ;
			}
		}
		if (len > 0 &&
		    (n = resolve_address(addr, len, af)) != NULL)
			return n;
	}
#endif
	return rt_addr_n2a(af, len, addr, buf, buflen);
}


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;
		if (i != len-1 && blen > 1) {
			*ptr++ = ':';
			blen--;
		}
	}
	return buf;
}

__u8* hexstring_a2n(const char *str, __u8 *buf, int blen)
{
	int cnt = 0;

	for (;;) {
		unsigned acc;
		char ch;

		acc = 0;

		while ((ch = *str) != ':' && ch != 0) {
			if (ch >= '0' && ch <= '9')
				ch -= '0';
			else if (ch >= 'a' && ch <= 'f')
				ch -= 'a'-10;
			else if (ch >= 'A' && ch <= 'F')
				ch -= 'A'-10;
			else
				return NULL;
			acc = (acc<<4) + ch;
			str++;
		}

		if (acc > 255)
			return NULL;
		if (cnt < blen) {
			buf[cnt] = acc;
			cnt++;
		}
		if (ch == 0)
			break;
		++str;
	}
	if (cnt < blen)
		memset(buf+cnt, 0, blen-cnt);
	return buf;
}

int print_timestamp(FILE *fp)
{
	struct timeval tv;
	char *tstr;

	memset(&tv, 0, sizeof(tv));
	gettimeofday(&tv, NULL);

	tstr = asctime(localtime(&tv.tv_sec));
	tstr[strlen(tstr)-1] = 0;
	fprintf(fp, "Timestamp: %s %ld usec\n", tstr, (long)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;

	if ((cc = getline(linep, lenp, in)) < 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;

		if ((cc1 = getline(&line1, &len1, in)) < 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 = strtok(line, ws); cp; cp = strtok(NULL, ws)) {
		if (argc >= (maxargs - 1)) {
			fprintf(stderr, "Too many arguments to command\n");
			exit(1);
		}
		argv[argc++] = cp;
	}
	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);
}
Commit	Line	Data
aba5acdf SH	1	/*
	2	* utils.c
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
	8	*
	9	* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
	10	*
aba5acdf SH	11	*/
	12
	13	#include <stdio.h>
	14	#include <stdlib.h>
697ac639	15	#include <math.h>
aba5acdf SH	16	#include <unistd.h>
	17	#include <syslog.h>
	18	#include <fcntl.h>
5bd9dd49	19	#include <limits.h>
aba5acdf SH	20	#include <sys/socket.h>
	21	#include <netinet/in.h>
	22	#include <string.h>
	23	#include <netdb.h>
	24	#include <arpa/inet.h>
5dfe5561	25	#include <asm/types.h>
aba5acdf	26	#include <linux/pkt_sched.h>
5bd9dd49	27	#include <linux/param.h>
90f93024 SH	28	#include <time.h>
90f93024 SH	29	#include <sys/time.h>
30d10db5	30	#include <errno.h>
90f93024	31
aba5acdf SH	32
	33	#include "utils.h"
	34
4094db72	35	int get_integer(int val, const char arg, int base)
aba5acdf SH	36	{
	37	long res;
	38	char *ptr;
	39
	40	if (!arg \|\| !*arg)
	41	return -1;
697ac639	42
aba5acdf	43	res = strtol(arg, &ptr, base);
697ac639 SH	44
	45	/* If there were no digits at all, strtol() stores
	46	* the original value of nptr in *endptr (and returns 0).
	47	* In particular, if nptr is not '\0' but *endptr is '\0' on return,
	48	* the entire string is valid.
	49	*/
	50	if (!ptr \|\| ptr == arg \|\| *ptr)
	51	return -1;
	52
	53	/* If an underflow occurs, strtol() returns LONG_MIN.
	54	* If an overflow occurs, strtol() returns LONG_MAX.
	55	* In both cases, errno is set to ERANGE.
	56	*/
	57	if ((res == LONG_MAX \|\| res == LONG_MIN) && errno == ERANGE)
aba5acdf	58	return -1;
697ac639 SH	59
	60	/* Outside range of int */
	61	if (res < INT_MIN \|\| res > INT_MAX)
	62	return -1;
	63
aba5acdf SH	64	*val = res;
	65	return 0;
	66	}
	67
6b1ac654	68	int mask2bits(__u32 netmask)
4b270b17 SH	69	{
4b270b17 SH	70	unsigned bits = 0;
6b1ac654 SH	71	__u32 mask = ntohl(netmask);
6b1ac654 SH	72	__u32 host = ~mask;
4b270b17	73
6b1ac654 SH	74	/* a valid netmask must be 2^n - 1 */
	75	if ((host & (host + 1)) != 0)
	76	return -1;
4b270b17	77
6b1ac654 SH	78	for (; mask; mask <<= 1)
6b1ac654 SH	79	++bits;
4b270b17 SH	80	return bits;
	81	}
	82
5a0d1cbf AH	83	static int get_netmask(unsigned val, const char arg, int base)
	84	{
	85	inet_prefix addr;
	86
	87	if (!get_unsigned(val, arg, base))
	88	return 0;
	89
	90	/* try coverting dotted quad to CIDR */
6b1ac654 SH	91	if (!get_addr_1(&addr, arg, AF_INET) && addr.family == AF_INET) {
	92	int b = mask2bits(addr.data[0]);
	93
	94	if (b >= 0) {
	95	*val = b;
5a0d1cbf	96	return 0;
6b1ac654	97	}
5a0d1cbf AH	98	}
	99
	100	return -1;
	101	}
	102
4094db72	103	int get_unsigned(unsigned val, const char arg, int base)
aba5acdf SH	104	{
	105	unsigned long res;
	106	char *ptr;
	107
	108	if (!arg \|\| !*arg)
	109	return -1;
697ac639	110
aba5acdf	111	res = strtoul(arg, &ptr, base);
697ac639 SH	112
	113	/* empty string or trailing non-digits */
	114	if (!ptr \|\| ptr == arg \|\| *ptr)
	115	return -1;
	116
	117	/* overflow */
	118	if (res == ULONG_MAX && errno == ERANGE)
aba5acdf	119	return -1;
697ac639 SH	120
	121	/* out side range of unsigned */
	122	if (res > UINT_MAX)
	123	return -1;
	124
aba5acdf SH	125	*val = res;
	126	return 0;
	127	}
	128
54e0b2e7	129	/*
db6b0cfa GR	130	* get_time_rtt is "translated" from a similar routine "get_time" in
	131	* tc_util.c. We don't use the exact same routine because tc passes
	132	* microseconds to the kernel and the callers of get_time_rtt want to
	133	* pass milliseconds (standard unit for rtt values since 2.6.27), and
	134	* have a different assumption for the units of a "raw" number.
54e0b2e7	135	*/
db6b0cfa	136	int get_time_rtt(unsigned val, const char arg, int *raw)
54e0b2e7 RJ	137	{
	138	double t;
	139	unsigned long res;
	140	char *p;
	141
697ac639 SH	142	if (strchr(arg, '.') != NULL) {
697ac639 SH	143	t = strtod(arg, &p);
54e0b2e7 RJ	144	if (t < 0.0)
54e0b2e7 RJ	145	return -1;
697ac639 SH	146
	147	/* extra non-digits */
	148	if (!p \|\| p == arg \|\| *p)
	149	return -1;
	150
	151	/* over/underflow */
	152	if ((t == HUGE_VALF \|\| t == HUGE_VALL) && errno == ERANGE)
	153	return -1;
	154	} else {
897fb84f	155	res = strtoul(arg, &p, 0);
697ac639 SH	156
	157	/* empty string or trailing non-digits */
	158	if (!p \|\| p == arg \|\| *p)
	159	return -1;
	160
	161	/* overflow */
	162	if (res == ULONG_MAX && errno == ERANGE)
54e0b2e7	163	return -1;
697ac639	164
54e0b2e7 RJ	165	t = (double)res;
54e0b2e7 RJ	166	}
697ac639	167
54e0b2e7 RJ	168	if (p == arg)
54e0b2e7 RJ	169	return -1;
54e0b2e7 RJ	170	*raw = 1;
	171
	172	if (*p) {
	173	*raw = 0;
	174	if (strcasecmp(p, "s") == 0 \|\| strcasecmp(p, "sec")==0 \|\|
	175	strcasecmp(p, "secs")==0)
fca1dae8	176	t *= 1000;
54e0b2e7 RJ	177	else if (strcasecmp(p, "ms") == 0 \|\| strcasecmp(p, "msec")==0 \|\|
54e0b2e7 RJ	178	strcasecmp(p, "msecs") == 0)
54e0b2e7 RJ	179	t = 1.0; / allow suffix, do nothing */
	180	else
	181	return -1;
	182	}
	183
	184	/* emulate ceil() without having to bring-in -lm and always be >= 1 */
	185
db6b0cfa GR	186	*val = t;
	187	if (*val < t)
	188	*val += 1;
54e0b2e7 RJ	189
	190	return 0;
	191
	192	}
	193
c7699875	194	int get_u64(__u64 val, const char arg, int base)
	195	{
	196	unsigned long long res;
	197	char *ptr;
	198
	199	if (!arg \|\| !*arg)
	200	return -1;
697ac639	201
c7699875	202	res = strtoull(arg, &ptr, base);
697ac639 SH	203
	204	/* empty string or trailing non-digits */
	205	if (!ptr \|\| ptr == arg \|\| *ptr)
	206	return -1;
	207
	208	/* overflow */
	209	if (res == ULLONG_MAX && errno == ERANGE)
	210	return -1;
	211
	212	/* in case ULL is 128 bits */
	213	if (res > 0xFFFFFFFFFFFFFFFFULL)
	214	return -1;
	215
c7699875	216	*val = res;
	217	return 0;
	218	}
	219
4094db72	220	int get_u32(__u32 val, const char arg, int base)
aba5acdf SH	221	{
	222	unsigned long res;
	223	char *ptr;
	224
	225	if (!arg \|\| !*arg)
	226	return -1;
	227	res = strtoul(arg, &ptr, base);
697ac639 SH	228
	229	/* empty string or trailing non-digits */
	230	if (!ptr \|\| ptr == arg \|\| *ptr)
	231	return -1;
	232
	233	/* overflow */
	234	if (res == ULONG_MAX && errno == ERANGE)
	235	return -1;
	236
	237	/* in case UL > 32 bits */
	238	if (res > 0xFFFFFFFFUL)
aba5acdf	239	return -1;
697ac639	240
aba5acdf SH	241	*val = res;
	242	return 0;
	243	}
	244
4094db72	245	int get_u16(__u16 val, const char arg, int base)
aba5acdf SH	246	{
	247	unsigned long res;
	248	char *ptr;
	249
	250	if (!arg \|\| !*arg)
	251	return -1;
	252	res = strtoul(arg, &ptr, base);
697ac639 SH	253
	254	/* empty string or trailing non-digits */
	255	if (!ptr \|\| ptr == arg \|\| *ptr)
	256	return -1;
	257
	258	/* overflow */
	259	if (res == ULONG_MAX && errno == ERANGE)
aba5acdf	260	return -1;
697ac639 SH	261
	262	if (res > 0xFFFFUL)
	263	return -1;
	264
aba5acdf SH	265	*val = res;
	266	return 0;
	267	}
	268
4094db72	269	int get_u8(__u8 val, const char arg, int base)
aba5acdf SH	270	{
	271	unsigned long res;
	272	char *ptr;
	273
	274	if (!arg \|\| !*arg)
	275	return -1;
697ac639	276
aba5acdf	277	res = strtoul(arg, &ptr, base);
697ac639 SH	278	/* empty string or trailing non-digits */
	279	if (!ptr \|\| ptr == arg \|\| *ptr)
	280	return -1;
	281
	282	/* overflow */
	283	if (res == ULONG_MAX && errno == ERANGE)
aba5acdf	284	return -1;
697ac639 SH	285
	286	if (res > 0xFFUL)
	287	return -1;
	288
aba5acdf SH	289	*val = res;
	290	return 0;
	291	}
	292
30d10db5 HPP	293	int get_s32(__s32 val, const char arg, int base)
	294	{
	295	long res;
	296	char *ptr;
	297
	298	errno = 0;
	299
	300	if (!arg \|\| !*arg)
	301	return -1;
	302	res = strtol(arg, &ptr, base);
697ac639 SH	303	if (!ptr \|\| ptr == arg \|\| *ptr)
	304	return -1;
	305	if ((res == LONG_MIN \|\| res == LONG_MAX) && errno == ERANGE)
30d10db5	306	return -1;
697ac639 SH	307	if (res > INT32_MAX \|\| res < INT32_MIN)
	308	return -1;
	309
30d10db5 HPP	310	*val = res;
	311	return 0;
	312	}
	313
4094db72	314	int get_s16(__s16 val, const char arg, int base)
aba5acdf SH	315	{
	316	long res;
	317	char *ptr;
	318
	319	if (!arg \|\| !*arg)
	320	return -1;
	321	res = strtol(arg, &ptr, base);
697ac639 SH	322	if (!ptr \|\| ptr == arg \|\| *ptr)
	323	return -1;
	324	if ((res == LONG_MIN \|\| res == LONG_MAX) && errno == ERANGE)
	325	return -1;
	326	if (res > 0x7FFF \|\| res < -0x8000)
aba5acdf	327	return -1;
697ac639	328
aba5acdf SH	329	*val = res;
	330	return 0;
	331	}
	332
4094db72	333	int get_s8(__s8 val, const char arg, int base)
aba5acdf SH	334	{
	335	long res;
	336	char *ptr;
	337
	338	if (!arg \|\| !*arg)
	339	return -1;
	340	res = strtol(arg, &ptr, base);
697ac639 SH	341	if (!ptr \|\| ptr == arg \|\| *ptr)
	342	return -1;
	343	if ((res == LONG_MIN \|\| res == LONG_MAX) && errno == ERANGE)
	344	return -1;
	345	if (res > 0x7F \|\| res < -0x80)
aba5acdf SH	346	return -1;
	347	*val = res;
	348	return 0;
	349	}
	350
cafa6c8e SH	351	/* This uses a non-standard parsing (ie not inet_aton, or inet_pton)
	352	* because of legacy choice to parse 10.8 as 10.8.0.0 not 10.0.0.8
	353	*/
	354	static int get_addr_ipv4(__u8 ap, const char cp)
aba5acdf	355	{
cafa6c8e SH	356	int i;
	357
	358	for (i = 0; i < 4; i++) {
	359	unsigned long n;
	360	char *endp;
	361
	362	n = strtoul(cp, &endp, 0);
	363	if (n > 255)
	364	return -1; /* bogus network value */
	365
	366	if (endp == cp) /* no digits */
	367	return -1;
94afda75	368
cafa6c8e SH	369	ap[i] = n;
	370
	371	if (*endp == '\0')
	372	break;
	373
	374	if (i == 3 \|\| *endp != '.')
	375	return -1; /* extra characters */
	376	cp = endp + 1;
	377	}
	378
	379	return 1;
	380	}
	381
	382	int get_addr_1(inet_prefix addr, const char name, int family)
	383	{
aba5acdf SH	384	memset(addr, 0, sizeof(*addr));
	385
	386	if (strcmp(name, "default") == 0 \|\|
	387	strcmp(name, "all") == 0 \|\|
	388	strcmp(name, "any") == 0) {
	389	if (family == AF_DECnet)
	390	return -1;
	391	addr->family = family;
	392	addr->bytelen = (family == AF_INET6 ? 16 : 4);
	393	addr->bitlen = -1;
	394	return 0;
	395	}
	396
	397	if (strchr(name, ':')) {
	398	addr->family = AF_INET6;
	399	if (family != AF_UNSPEC && family != AF_INET6)
	400	return -1;
	401	if (inet_pton(AF_INET6, name, addr->data) <= 0)
	402	return -1;
	403	addr->bytelen = 16;
	404	addr->bitlen = -1;
	405	return 0;
	406	}
	407
	408	if (family == AF_DECnet) {
	409	struct dn_naddr dna;
	410	addr->family = AF_DECnet;
	411	if (dnet_pton(AF_DECnet, name, &dna) <= 0)
	412	return -1;
	413	memcpy(addr->data, dna.a_addr, 2);
	414	addr->bytelen = 2;
	415	addr->bitlen = -1;
	416	return 0;
	417	}
	418
	419	addr->family = AF_INET;
	420	if (family != AF_UNSPEC && family != AF_INET)
	421	return -1;
94afda75	422
cafa6c8e	423	if (get_addr_ipv4((__u8 *)addr->data, name) <= 0)
516ffb6b	424	return -1;
94afda75	425
aba5acdf SH	426	addr->bytelen = 4;
aba5acdf SH	427	addr->bitlen = -1;
aba5acdf SH	428	return 0;
	429	}
	430
fb9b1d0f	431	int get_prefix_1(inet_prefix dst, char arg, int family)
aba5acdf SH	432	{
	433	int err;
	434	unsigned plen;
	435	char *slash;
	436
	437	memset(dst, 0, sizeof(*dst));
	438
	439	if (strcmp(arg, "default") == 0 \|\|
	440	strcmp(arg, "any") == 0 \|\|
	441	strcmp(arg, "all") == 0) {
	442	if (family == AF_DECnet)
	443	return -1;
	444	dst->family = family;
	445	dst->bytelen = 0;
	446	dst->bitlen = 0;
	447	return 0;
	448	}
	449
	450	slash = strchr(arg, '/');
	451	if (slash)
	452	*slash = 0;
fb9b1d0f	453
aba5acdf SH	454	err = get_addr_1(dst, arg, family);
	455	if (err == 0) {
	456	switch(dst->family) {
	457	case AF_INET6:
	458	dst->bitlen = 128;
	459	break;
	460	case AF_DECnet:
	461	dst->bitlen = 16;
	462	break;
	463	default:
	464	case AF_INET:
	465	dst->bitlen = 32;
	466	}
	467	if (slash) {
5a0d1cbf AH	468	if (get_netmask(&plen, slash+1, 0)
5a0d1cbf AH	469	\|\| plen > dst->bitlen) {
aba5acdf SH	470	err = -1;
	471	goto done;
	472	}
f082b64f	473	dst->flags \|= PREFIXLEN_SPECIFIED;
aba5acdf SH	474	dst->bitlen = plen;
	475	}
	476	}
	477	done:
	478	if (slash)
	479	*slash = '/';
	480	return err;
	481	}
	482
c7699875	483	int get_addr(inet_prefix dst, const char arg, int family)
aba5acdf SH	484	{
	485	if (family == AF_PACKET) {
	486	fprintf(stderr, "Error: \"%s\" may be inet address, but it is not allowed in this context.\n", arg);
	487	exit(1);
	488	}
	489	if (get_addr_1(dst, arg, family)) {
	490	fprintf(stderr, "Error: an inet address is expected rather than \"%s\".\n", arg);
	491	exit(1);
	492	}
	493	return 0;
	494	}
	495
fb9b1d0f	496	int get_prefix(inet_prefix dst, char arg, int family)
aba5acdf SH	497	{
	498	if (family == AF_PACKET) {
	499	fprintf(stderr, "Error: \"%s\" may be inet prefix, but it is not allowed in this context.\n", arg);
	500	exit(1);
	501	}
	502	if (get_prefix_1(dst, arg, family)) {
	503	fprintf(stderr, "Error: an inet prefix is expected rather than \"%s\".\n", arg);
	504	exit(1);
	505	}
	506	return 0;
	507	}
	508
c7699875	509	__u32 get_addr32(const char *name)
aba5acdf SH	510	{
	511	inet_prefix addr;
	512	if (get_addr_1(&addr, name, AF_INET)) {
	513	fprintf(stderr, "Error: an IP address is expected rather than \"%s\"\n", name);
	514	exit(1);
	515	}
	516	return addr.data[0];
	517	}
	518
4094db72	519	void incomplete_command(void)
aba5acdf SH	520	{
	521	fprintf(stderr, "Command line is not complete. Try option \"help\"\n");
	522	exit(-1);
	523	}
	524
c7699875	525	void missarg(const char *key)
	526	{
	527	fprintf(stderr, "Error: argument \"%s\" is required\n", key);
	528	exit(-1);
	529	}
	530
4094db72	531	void invarg(const char msg, const char arg)
aba5acdf SH	532	{
	533	fprintf(stderr, "Error: argument \"%s\" is wrong: %s\n", arg, msg);
	534	exit(-1);
	535	}
	536
4094db72	537	void duparg(const char key, const char arg)
aba5acdf SH	538	{
	539	fprintf(stderr, "Error: duplicate \"%s\": \"%s\" is the second value.\n", key, arg);
	540	exit(-1);
	541	}
	542
4094db72	543	void duparg2(const char key, const char arg)
aba5acdf SH	544	{
	545	fprintf(stderr, "Error: either \"%s\" is duplicate, or \"%s\" is a garbage.\n", key, arg);
	546	exit(-1);
	547	}
	548
4094db72	549	int matches(const char cmd, const char pattern)
aba5acdf SH	550	{
	551	int len = strlen(cmd);
	552	if (len > strlen(pattern))
	553	return -1;
	554	return memcmp(pattern, cmd, len);
	555	}
	556
4094db72	557	int inet_addr_match(const inet_prefix a, const inet_prefix b, int bits)
aba5acdf	558	{
9626dfd5 SH	559	const __u32 *a1 = a->data;
9626dfd5 SH	560	const __u32 *a2 = b->data;
aba5acdf SH	561	int words = bits >> 0x05;
	562
	563	bits &= 0x1f;
	564
	565	if (words)
	566	if (memcmp(a1, a2, words << 2))
	567	return -1;
	568
	569	if (bits) {
	570	__u32 w1, w2;
	571	__u32 mask;
	572
	573	w1 = a1[words];
	574	w2 = a2[words];
	575
	576	mask = htonl((0xffffffff) << (0x20 - bits));
	577
	578	if ((w1 ^ w2) & mask)
	579	return 1;
	580	}
	581
	582	return 0;
	583	}
	584
	585	int __iproute2_hz_internal;
	586
	587	int __get_hz(void)
	588	{
	589	char name[1024];
	590	int hz = 0;
	591	FILE *fp;
	592
	593	if (getenv("HZ"))
	594	return atoi(getenv("HZ")) ? : HZ;
	595
	596	if (getenv("PROC_NET_PSCHED")) {
	597	snprintf(name, sizeof(name)-1, "%s", getenv("PROC_NET_PSCHED"));
c7699875	598	} else if (getenv("PROC_ROOT")) {
aba5acdf SH	599	snprintf(name, sizeof(name)-1, "%s/net/psched", getenv("PROC_ROOT"));
	600	} else {
	601	strcpy(name, "/proc/net/psched");
	602	}
	603	fp = fopen(name, "r");
	604
	605	if (fp) {
	606	unsigned nom, denom;
	607	if (fscanf(fp, "%08x%08x%08x%08x", &nom, &denom) == 2)
	608	if (nom == 1000000)
	609	hz = denom;
	610	fclose(fp);
	611	}
	612	if (hz)
	613	return hz;
	614	return HZ;
	615	}
	616
5e8bc631	617	int __iproute2_user_hz_internal;
	618
	619	int __get_user_hz(void)
	620	{
	621	return sysconf(_SC_CLK_TCK);
	622	}
	623
4094db72	624	const char rt_addr_n2a(int af, int len, const void addr, char *buf, int buflen)
aba5acdf SH	625	{
	626	switch (af) {
	627	case AF_INET:
	628	case AF_INET6:
	629	return inet_ntop(af, addr, buf, buflen);
	630	case AF_IPX:
	631	return ipx_ntop(af, addr, buf, buflen);
	632	case AF_DECnet:
	633	{
	634	struct dn_naddr dna = { 2, { 0, 0, }};
	635	memcpy(dna.a_addr, addr, 2);
	636	return dnet_ntop(af, &dna, buf, buflen);
	637	}
	638	default:
	639	return "???";
	640	}
	641	}
	642
	643	#ifdef RESOLVE_HOSTNAMES
	644	struct namerec
	645	{
	646	struct namerec *next;
7dec1bf8	647	const char *name;
aba5acdf	648	inet_prefix addr;
aba5acdf SH	649	};
aba5acdf SH	650
7dec1bf8 SH	651	#define NHASH 257
7dec1bf8 SH	652	static struct namerec *nht[NHASH];
aba5acdf	653
7dec1bf8	654	static const char resolve_address(const void addr, int len, int af)
aba5acdf SH	655	{
	656	struct namerec *n;
	657	struct hostent *h_ent;
	658	unsigned hash;
	659	static int notfirst;
	660
	661
	662	if (af == AF_INET6 && ((__u32*)addr)[0] == 0 &&
	663	((__u32)addr)[1] == 0 && ((__u32)addr)[2] == htonl(0xffff)) {
	664	af = AF_INET;
	665	addr += 12;
	666	len = 4;
	667	}
	668
7dec1bf8	669	hash = (__u32 )(addr + len - 4) % NHASH;
aba5acdf SH	670
	671	for (n = nht[hash]; n; n = n->next) {
	672	if (n->addr.family == af &&
	673	n->addr.bytelen == len &&
	674	memcmp(n->addr.data, addr, len) == 0)
	675	return n->name;
	676	}
	677	if ((n = malloc(sizeof(*n))) == NULL)
	678	return NULL;
	679	n->addr.family = af;
	680	n->addr.bytelen = len;
	681	n->name = NULL;
	682	memcpy(n->addr.data, addr, len);
	683	n->next = nht[hash];
	684	nht[hash] = n;
	685	if (++notfirst == 1)
	686	sethostent(1);
	687	fflush(stdout);
	688
c7699875	689	if ((h_ent = gethostbyaddr(addr, len, af)) != NULL)
aba5acdf SH	690	n->name = strdup(h_ent->h_name);
	691
	692	/* Even if we fail, "negative" entry is remembered. */
	693	return n->name;
	694	}
	695	#endif
	696
	697
c7699875	698	const char format_host(int af, int len, const void addr,
4094db72	699	char *buf, int buflen)
aba5acdf SH	700	{
	701	#ifdef RESOLVE_HOSTNAMES
	702	if (resolve_hosts) {
7dec1bf8 SH	703	const char *n;
7dec1bf8 SH	704
aba5acdf SH	705	if (len <= 0) {
	706	switch (af) {
	707	case AF_INET:
	708	len = 4;
	709	break;
	710	case AF_INET6:
	711	len = 16;
	712	break;
	713	case AF_IPX:
	714	len = 10;
	715	break;
	716	#ifdef AF_DECnet
	717	/* I see no reasons why gethostbyname
	718	may not work for DECnet */
	719	case AF_DECnet:
	720	len = 2;
	721	break;
	722	#endif
	723	default: ;
	724	}
	725	}
	726	if (len > 0 &&
	727	(n = resolve_address(addr, len, af)) != NULL)
	728	return n;
	729	}
	730	#endif
	731	return rt_addr_n2a(af, len, addr, buf, buflen);
	732	}
	733
	734
f332d169	735	char hexstring_n2a(const __u8 str, int len, char *buf, int blen)
aba5acdf	736	{
f332d169	737	char *ptr = buf;
aba5acdf SH	738	int i;
	739
	740	for (i=0; i<len; i++) {
	741	if (blen < 3)
	742	break;
	743	sprintf(ptr, "%02x", str[i]);
	744	ptr += 2;
	745	blen -= 2;
	746	if (i != len-1 && blen > 1) {
	747	*ptr++ = ':';
	748	blen--;
	749	}
	750	}
	751	return buf;
	752	}
	753
f332d169	754	__u8* hexstring_a2n(const char str, __u8 buf, int blen)
aba5acdf SH	755	{
	756	int cnt = 0;
	757
	758	for (;;) {
	759	unsigned acc;
	760	char ch;
	761
	762	acc = 0;
	763
	764	while ((ch = *str) != ':' && ch != 0) {
	765	if (ch >= '0' && ch <= '9')
	766	ch -= '0';
	767	else if (ch >= 'a' && ch <= 'f')
	768	ch -= 'a'-10;
	769	else if (ch >= 'A' && ch <= 'F')
	770	ch -= 'A'-10;
	771	else
	772	return NULL;
	773	acc = (acc<<4) + ch;
	774	str++;
	775	}
	776
	777	if (acc > 255)
	778	return NULL;
	779	if (cnt < blen) {
	780	buf[cnt] = acc;
	781	cnt++;
	782	}
	783	if (ch == 0)
	784	break;
	785	++str;
	786	}
	787	if (cnt < blen)
	788	memset(buf+cnt, 0, blen-cnt);
	789	return buf;
	790	}
90f93024 SH	791
	792	int print_timestamp(FILE *fp)
	793	{
	794	struct timeval tv;
	795	char *tstr;
	796
	797	memset(&tv, 0, sizeof(tv));
	798	gettimeofday(&tv, NULL);
	799
	800	tstr = asctime(localtime(&tv.tv_sec));
	801	tstr[strlen(tstr)-1] = 0;
c083d99d	802	fprintf(fp, "Timestamp: %s %ld usec\n", tstr, (long)tv.tv_usec);
90f93024 SH	803	return 0;
90f93024 SH	804	}
351efcde SH	805
	806	int cmdlineno;
	807
	808	/* Like glibc getline but handle continuation lines and comments */
d21e8835	809	ssize_t getcmdline(char *linep, size_t lenp, FILE *in)
351efcde	810	{
d21e8835	811	ssize_t cc;
351efcde	812	char *cp;
ae665a52	813
351efcde SH	814	if ((cc = getline(linep, lenp, in)) < 0)
	815	return cc; /* eof or error */
	816	++cmdlineno;
	817
	818	cp = strchr(*linep, '#');
ae665a52	819	if (cp)
351efcde	820	*cp = '\0';
ae665a52	821
351efcde SH	822	while ((cp = strstr(*linep, "\\\n")) != NULL) {
	823	char *line1 = NULL;
	824	size_t len1 = 0;
21a85d3b	825	ssize_t cc1;
351efcde SH	826
	827	if ((cc1 = getline(&line1, &len1, in)) < 0) {
	828	fprintf(stderr, "Missing continuation line\n");
	829	return cc1;
	830	}
	831
	832	++cmdlineno;
	833	*cp = 0;
	834
	835	cp = strchr(line1, '#');
ae665a52	836	if (cp)
351efcde SH	837	*cp = '\0';
351efcde SH	838
d21e8835 AH	839	lenp = strlen(linep) + strlen(line1) + 1;
d21e8835 AH	840	linep = realloc(linep, *lenp);
351efcde SH	841	if (!*linep) {
351efcde SH	842	fprintf(stderr, "Out of memory\n");
d21e8835	843	*lenp = 0;
351efcde SH	844	return -1;
	845	}
	846	cc += cc1 - 2;
	847	strcat(*linep, line1);
	848	free(line1);
	849	}
	850	return cc;
	851	}
	852
	853	/* split command line into argument vector */
	854	int makeargs(char line, char argv[], int maxargs)
	855	{
	856	static const char ws[] = " \t\r\n";
	857	char *cp;
	858	int argc = 0;
	859
	860	for (cp = strtok(line, ws); cp; cp = strtok(NULL, ws)) {
	861	if (argc >= (maxargs - 1)) {
	862	fprintf(stderr, "Too many arguments to command\n");
	863	exit(1);
	864	}
	865	argv[argc++] = cp;
	866	}
	867	argv[argc] = NULL;
	868
	869	return argc;
	870	}
aa574cd6 WC	871
	872	int inet_get_addr(const char src, __u32 dst, struct in6_addr *dst6)
	873	{
	874	if (strchr(src, ':'))
	875	return inet_pton(AF_INET6, src, dst6);
	876	else
	877	return inet_pton(AF_INET, src, dst);
	878	}