[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 <unistd.h>
#include <syslog.h>
#include <fcntl.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 <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 (!ptr || ptr == arg || *ptr || res > INT_MAX || res < INT_MIN)
		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);
	if (!ptr || ptr == arg || *ptr || 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;
	}
	else {
		res = strtoul(arg, &p, 0);
		if (res > UINT_MAX)
			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);
	if (!ptr || ptr == arg || *ptr || res == 0xFFFFFFFFULL)
 		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);
	if (!ptr || ptr == arg || *ptr || 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);
	if (!ptr || ptr == arg || *ptr || res > 0xFFFF)
		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);
	if (!ptr || ptr == arg || *ptr || res > 0xFF)
		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 == arg || *ptr ||
	    ((res ==  LONG_MIN || res == LONG_MAX) && errno == ERANGE) ||
	    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 || 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 || 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 %lu 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;

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