[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 <resolv.h>
#include <asm/types.h>
#include <linux/pkt_sched.h>
#include <time.h>
#include <sys/time.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_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;
		size_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>
	23	#include <resolv.h>
5dfe5561	24	#include <asm/types.h>
aba5acdf	25	#include <linux/pkt_sched.h>
90f93024 SH	26	#include <time.h>
	27	#include <sys/time.h>
	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
4094db72	201	int get_s16(__s16 val, const char arg, int base)
aba5acdf SH	202	{
	203	long res;
	204	char *ptr;
	205
	206	if (!arg \|\| !*arg)
	207	return -1;
	208	res = strtol(arg, &ptr, base);
	209	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > 0x7FFF \|\| res < -0x8000)
	210	return -1;
	211	*val = res;
	212	return 0;
	213	}
	214
4094db72	215	int get_s8(__s8 val, const char arg, int base)
aba5acdf SH	216	{
	217	long res;
	218	char *ptr;
	219
	220	if (!arg \|\| !*arg)
	221	return -1;
	222	res = strtol(arg, &ptr, base);
	223	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > 0x7F \|\| res < -0x80)
	224	return -1;
	225	*val = res;
	226	return 0;
	227	}
	228
cafa6c8e SH	229	/* This uses a non-standard parsing (ie not inet_aton, or inet_pton)
	230	* because of legacy choice to parse 10.8 as 10.8.0.0 not 10.0.0.8
	231	*/
	232	static int get_addr_ipv4(__u8 ap, const char cp)
aba5acdf	233	{
cafa6c8e SH	234	int i;
	235
	236	for (i = 0; i < 4; i++) {
	237	unsigned long n;
	238	char *endp;
	239
	240	n = strtoul(cp, &endp, 0);
	241	if (n > 255)
	242	return -1; /* bogus network value */
	243
	244	if (endp == cp) /* no digits */
	245	return -1;
94afda75	246
cafa6c8e SH	247	ap[i] = n;
	248
	249	if (*endp == '\0')
	250	break;
	251
	252	if (i == 3 \|\| *endp != '.')
	253	return -1; /* extra characters */
	254	cp = endp + 1;
	255	}
	256
	257	return 1;
	258	}
	259
	260	int get_addr_1(inet_prefix addr, const char name, int family)
	261	{
aba5acdf SH	262	memset(addr, 0, sizeof(*addr));
	263
	264	if (strcmp(name, "default") == 0 \|\|
	265	strcmp(name, "all") == 0 \|\|
	266	strcmp(name, "any") == 0) {
	267	if (family == AF_DECnet)
	268	return -1;
	269	addr->family = family;
	270	addr->bytelen = (family == AF_INET6 ? 16 : 4);
	271	addr->bitlen = -1;
	272	return 0;
	273	}
	274
	275	if (strchr(name, ':')) {
	276	addr->family = AF_INET6;
	277	if (family != AF_UNSPEC && family != AF_INET6)
	278	return -1;
	279	if (inet_pton(AF_INET6, name, addr->data) <= 0)
	280	return -1;
	281	addr->bytelen = 16;
	282	addr->bitlen = -1;
	283	return 0;
	284	}
	285
	286	if (family == AF_DECnet) {
	287	struct dn_naddr dna;
	288	addr->family = AF_DECnet;
	289	if (dnet_pton(AF_DECnet, name, &dna) <= 0)
	290	return -1;
	291	memcpy(addr->data, dna.a_addr, 2);
	292	addr->bytelen = 2;
	293	addr->bitlen = -1;
	294	return 0;
	295	}
	296
	297	addr->family = AF_INET;
	298	if (family != AF_UNSPEC && family != AF_INET)
	299	return -1;
94afda75	300
cafa6c8e	301	if (get_addr_ipv4((__u8 *)addr->data, name) <= 0)
516ffb6b	302	return -1;
94afda75	303
aba5acdf SH	304	addr->bytelen = 4;
aba5acdf SH	305	addr->bitlen = -1;
aba5acdf SH	306	return 0;
	307	}
	308
fb9b1d0f	309	int get_prefix_1(inet_prefix dst, char arg, int family)
aba5acdf SH	310	{
	311	int err;
	312	unsigned plen;
	313	char *slash;
	314
	315	memset(dst, 0, sizeof(*dst));
	316
	317	if (strcmp(arg, "default") == 0 \|\|
	318	strcmp(arg, "any") == 0 \|\|
	319	strcmp(arg, "all") == 0) {
	320	if (family == AF_DECnet)
	321	return -1;
	322	dst->family = family;
	323	dst->bytelen = 0;
	324	dst->bitlen = 0;
	325	return 0;
	326	}
	327
	328	slash = strchr(arg, '/');
	329	if (slash)
	330	*slash = 0;
fb9b1d0f	331
aba5acdf SH	332	err = get_addr_1(dst, arg, family);
	333	if (err == 0) {
	334	switch(dst->family) {
	335	case AF_INET6:
	336	dst->bitlen = 128;
	337	break;
	338	case AF_DECnet:
	339	dst->bitlen = 16;
	340	break;
	341	default:
	342	case AF_INET:
	343	dst->bitlen = 32;
	344	}
	345	if (slash) {
5a0d1cbf AH	346	if (get_netmask(&plen, slash+1, 0)
5a0d1cbf AH	347	\|\| plen > dst->bitlen) {
aba5acdf SH	348	err = -1;
	349	goto done;
	350	}
f082b64f	351	dst->flags \|= PREFIXLEN_SPECIFIED;
aba5acdf SH	352	dst->bitlen = plen;
	353	}
	354	}
	355	done:
	356	if (slash)
	357	*slash = '/';
	358	return err;
	359	}
	360
c7699875	361	int get_addr(inet_prefix dst, const char arg, int family)
aba5acdf SH	362	{
	363	if (family == AF_PACKET) {
	364	fprintf(stderr, "Error: \"%s\" may be inet address, but it is not allowed in this context.\n", arg);
	365	exit(1);
	366	}
	367	if (get_addr_1(dst, arg, family)) {
	368	fprintf(stderr, "Error: an inet address is expected rather than \"%s\".\n", arg);
	369	exit(1);
	370	}
	371	return 0;
	372	}
	373
fb9b1d0f	374	int get_prefix(inet_prefix dst, char arg, int family)
aba5acdf SH	375	{
	376	if (family == AF_PACKET) {
	377	fprintf(stderr, "Error: \"%s\" may be inet prefix, but it is not allowed in this context.\n", arg);
	378	exit(1);
	379	}
	380	if (get_prefix_1(dst, arg, family)) {
	381	fprintf(stderr, "Error: an inet prefix is expected rather than \"%s\".\n", arg);
	382	exit(1);
	383	}
	384	return 0;
	385	}
	386
c7699875	387	__u32 get_addr32(const char *name)
aba5acdf SH	388	{
	389	inet_prefix addr;
	390	if (get_addr_1(&addr, name, AF_INET)) {
	391	fprintf(stderr, "Error: an IP address is expected rather than \"%s\"\n", name);
	392	exit(1);
	393	}
	394	return addr.data[0];
	395	}
	396
4094db72	397	void incomplete_command(void)
aba5acdf SH	398	{
	399	fprintf(stderr, "Command line is not complete. Try option \"help\"\n");
	400	exit(-1);
	401	}
	402
c7699875	403	void missarg(const char *key)
	404	{
	405	fprintf(stderr, "Error: argument \"%s\" is required\n", key);
	406	exit(-1);
	407	}
	408
4094db72	409	void invarg(const char msg, const char arg)
aba5acdf SH	410	{
	411	fprintf(stderr, "Error: argument \"%s\" is wrong: %s\n", arg, msg);
	412	exit(-1);
	413	}
	414
4094db72	415	void duparg(const char key, const char arg)
aba5acdf SH	416	{
	417	fprintf(stderr, "Error: duplicate \"%s\": \"%s\" is the second value.\n", key, arg);
	418	exit(-1);
	419	}
	420
4094db72	421	void duparg2(const char key, const char arg)
aba5acdf SH	422	{
	423	fprintf(stderr, "Error: either \"%s\" is duplicate, or \"%s\" is a garbage.\n", key, arg);
	424	exit(-1);
	425	}
	426
4094db72	427	int matches(const char cmd, const char pattern)
aba5acdf SH	428	{
	429	int len = strlen(cmd);
	430	if (len > strlen(pattern))
	431	return -1;
	432	return memcmp(pattern, cmd, len);
	433	}
	434
4094db72	435	int inet_addr_match(const inet_prefix a, const inet_prefix b, int bits)
aba5acdf	436	{
9626dfd5 SH	437	const __u32 *a1 = a->data;
9626dfd5 SH	438	const __u32 *a2 = b->data;
aba5acdf SH	439	int words = bits >> 0x05;
	440
	441	bits &= 0x1f;
	442
	443	if (words)
	444	if (memcmp(a1, a2, words << 2))
	445	return -1;
	446
	447	if (bits) {
	448	__u32 w1, w2;
	449	__u32 mask;
	450
	451	w1 = a1[words];
	452	w2 = a2[words];
	453
	454	mask = htonl((0xffffffff) << (0x20 - bits));
	455
	456	if ((w1 ^ w2) & mask)
	457	return 1;
	458	}
	459
	460	return 0;
	461	}
	462
	463	int __iproute2_hz_internal;
	464
	465	int __get_hz(void)
	466	{
	467	char name[1024];
	468	int hz = 0;
	469	FILE *fp;
	470
	471	if (getenv("HZ"))
	472	return atoi(getenv("HZ")) ? : HZ;
	473
	474	if (getenv("PROC_NET_PSCHED")) {
	475	snprintf(name, sizeof(name)-1, "%s", getenv("PROC_NET_PSCHED"));
c7699875	476	} else if (getenv("PROC_ROOT")) {
aba5acdf SH	477	snprintf(name, sizeof(name)-1, "%s/net/psched", getenv("PROC_ROOT"));
	478	} else {
	479	strcpy(name, "/proc/net/psched");
	480	}
	481	fp = fopen(name, "r");
	482
	483	if (fp) {
	484	unsigned nom, denom;
	485	if (fscanf(fp, "%08x%08x%08x%08x", &nom, &denom) == 2)
	486	if (nom == 1000000)
	487	hz = denom;
	488	fclose(fp);
	489	}
	490	if (hz)
	491	return hz;
	492	return HZ;
	493	}
	494
5e8bc631	495	int __iproute2_user_hz_internal;
	496
	497	int __get_user_hz(void)
	498	{
	499	return sysconf(_SC_CLK_TCK);
	500	}
	501
4094db72	502	const char rt_addr_n2a(int af, int len, const void addr, char *buf, int buflen)
aba5acdf SH	503	{
	504	switch (af) {
	505	case AF_INET:
	506	case AF_INET6:
	507	return inet_ntop(af, addr, buf, buflen);
	508	case AF_IPX:
	509	return ipx_ntop(af, addr, buf, buflen);
	510	case AF_DECnet:
	511	{
	512	struct dn_naddr dna = { 2, { 0, 0, }};
	513	memcpy(dna.a_addr, addr, 2);
	514	return dnet_ntop(af, &dna, buf, buflen);
	515	}
	516	default:
	517	return "???";
	518	}
	519	}
	520
	521	#ifdef RESOLVE_HOSTNAMES
	522	struct namerec
	523	{
	524	struct namerec *next;
7dec1bf8	525	const char *name;
aba5acdf	526	inet_prefix addr;
aba5acdf SH	527	};
aba5acdf SH	528
7dec1bf8 SH	529	#define NHASH 257
7dec1bf8 SH	530	static struct namerec *nht[NHASH];
aba5acdf	531
7dec1bf8	532	static const char resolve_address(const void addr, int len, int af)
aba5acdf SH	533	{
	534	struct namerec *n;
	535	struct hostent *h_ent;
	536	unsigned hash;
	537	static int notfirst;
	538
	539
	540	if (af == AF_INET6 && ((__u32*)addr)[0] == 0 &&
	541	((__u32)addr)[1] == 0 && ((__u32)addr)[2] == htonl(0xffff)) {
	542	af = AF_INET;
	543	addr += 12;
	544	len = 4;
	545	}
	546
7dec1bf8	547	hash = (__u32 )(addr + len - 4) % NHASH;
aba5acdf SH	548
	549	for (n = nht[hash]; n; n = n->next) {
	550	if (n->addr.family == af &&
	551	n->addr.bytelen == len &&
	552	memcmp(n->addr.data, addr, len) == 0)
	553	return n->name;
	554	}
	555	if ((n = malloc(sizeof(*n))) == NULL)
	556	return NULL;
	557	n->addr.family = af;
	558	n->addr.bytelen = len;
	559	n->name = NULL;
	560	memcpy(n->addr.data, addr, len);
	561	n->next = nht[hash];
	562	nht[hash] = n;
	563	if (++notfirst == 1)
	564	sethostent(1);
	565	fflush(stdout);
	566
c7699875	567	if ((h_ent = gethostbyaddr(addr, len, af)) != NULL)
aba5acdf SH	568	n->name = strdup(h_ent->h_name);
	569
	570	/* Even if we fail, "negative" entry is remembered. */
	571	return n->name;
	572	}
	573	#endif
	574
	575
c7699875	576	const char format_host(int af, int len, const void addr,
4094db72	577	char *buf, int buflen)
aba5acdf SH	578	{
	579	#ifdef RESOLVE_HOSTNAMES
	580	if (resolve_hosts) {
7dec1bf8 SH	581	const char *n;
7dec1bf8 SH	582
aba5acdf SH	583	if (len <= 0) {
	584	switch (af) {
	585	case AF_INET:
	586	len = 4;
	587	break;
	588	case AF_INET6:
	589	len = 16;
	590	break;
	591	case AF_IPX:
	592	len = 10;
	593	break;
	594	#ifdef AF_DECnet
	595	/* I see no reasons why gethostbyname
	596	may not work for DECnet */
	597	case AF_DECnet:
	598	len = 2;
	599	break;
	600	#endif
	601	default: ;
	602	}
	603	}
	604	if (len > 0 &&
	605	(n = resolve_address(addr, len, af)) != NULL)
	606	return n;
	607	}
	608	#endif
	609	return rt_addr_n2a(af, len, addr, buf, buflen);
	610	}
	611
	612
f332d169	613	char hexstring_n2a(const __u8 str, int len, char *buf, int blen)
aba5acdf	614	{
f332d169	615	char *ptr = buf;
aba5acdf SH	616	int i;
	617
	618	for (i=0; i<len; i++) {
	619	if (blen < 3)
	620	break;
	621	sprintf(ptr, "%02x", str[i]);
	622	ptr += 2;
	623	blen -= 2;
	624	if (i != len-1 && blen > 1) {
	625	*ptr++ = ':';
	626	blen--;
	627	}
	628	}
	629	return buf;
	630	}
	631
f332d169	632	__u8* hexstring_a2n(const char str, __u8 buf, int blen)
aba5acdf SH	633	{
	634	int cnt = 0;
	635
	636	for (;;) {
	637	unsigned acc;
	638	char ch;
	639
	640	acc = 0;
	641
	642	while ((ch = *str) != ':' && ch != 0) {
	643	if (ch >= '0' && ch <= '9')
	644	ch -= '0';
	645	else if (ch >= 'a' && ch <= 'f')
	646	ch -= 'a'-10;
	647	else if (ch >= 'A' && ch <= 'F')
	648	ch -= 'A'-10;
	649	else
	650	return NULL;
	651	acc = (acc<<4) + ch;
	652	str++;
	653	}
	654
	655	if (acc > 255)
	656	return NULL;
	657	if (cnt < blen) {
	658	buf[cnt] = acc;
	659	cnt++;
	660	}
	661	if (ch == 0)
	662	break;
	663	++str;
	664	}
	665	if (cnt < blen)
	666	memset(buf+cnt, 0, blen-cnt);
	667	return buf;
	668	}
90f93024 SH	669
	670	int print_timestamp(FILE *fp)
	671	{
	672	struct timeval tv;
	673	char *tstr;
	674
	675	memset(&tv, 0, sizeof(tv));
	676	gettimeofday(&tv, NULL);
	677
	678	tstr = asctime(localtime(&tv.tv_sec));
	679	tstr[strlen(tstr)-1] = 0;
	680	fprintf(fp, "Timestamp: %s %lu usec\n", tstr, tv.tv_usec);
	681	return 0;
	682	}
351efcde SH	683
	684	int cmdlineno;
	685
	686	/* Like glibc getline but handle continuation lines and comments */
d21e8835	687	ssize_t getcmdline(char *linep, size_t lenp, FILE *in)
351efcde	688	{
d21e8835	689	ssize_t cc;
351efcde	690	char *cp;
ae665a52	691
351efcde SH	692	if ((cc = getline(linep, lenp, in)) < 0)
	693	return cc; /* eof or error */
	694	++cmdlineno;
	695
	696	cp = strchr(*linep, '#');
ae665a52	697	if (cp)
351efcde	698	*cp = '\0';
ae665a52	699
351efcde SH	700	while ((cp = strstr(*linep, "\\\n")) != NULL) {
	701	char *line1 = NULL;
	702	size_t len1 = 0;
	703	size_t cc1;
	704
	705	if ((cc1 = getline(&line1, &len1, in)) < 0) {
	706	fprintf(stderr, "Missing continuation line\n");
	707	return cc1;
	708	}
	709
	710	++cmdlineno;
	711	*cp = 0;
	712
	713	cp = strchr(line1, '#');
ae665a52	714	if (cp)
351efcde SH	715	*cp = '\0';
351efcde SH	716
d21e8835 AH	717	lenp = strlen(linep) + strlen(line1) + 1;
d21e8835 AH	718	linep = realloc(linep, *lenp);
351efcde SH	719	if (!*linep) {
351efcde SH	720	fprintf(stderr, "Out of memory\n");
d21e8835	721	*lenp = 0;
351efcde SH	722	return -1;
	723	}
	724	cc += cc1 - 2;
	725	strcat(*linep, line1);
	726	free(line1);
	727	}
	728	return cc;
	729	}
	730
	731	/* split command line into argument vector */
	732	int makeargs(char line, char argv[], int maxargs)
	733	{
	734	static const char ws[] = " \t\r\n";
	735	char *cp;
	736	int argc = 0;
	737
	738	for (cp = strtok(line, ws); cp; cp = strtok(NULL, ws)) {
	739	if (argc >= (maxargs - 1)) {
	740	fprintf(stderr, "Too many arguments to command\n");
	741	exit(1);
	742	}
	743	argv[argc++] = cp;
	744	}
	745	argv[argc] = NULL;
	746
	747	return argc;
	748	}