[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>
 *
 *
 * Changes:
 *
 * Rani Assaf <rani@magic.metawire.com> 980929:	resolve addresses
 */

#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_jiffies 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_jiffies want 
 * to pass jiffies, and have a different assumption for the units of
 * a "raw" number.
 */

int get_jiffies(unsigned *jiffies, const char *arg, int base, 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,base);
		if (res > UINT_MAX)
			return -1;
		t = (double)res;
	}
	if (p == arg)
		return -1;

	if (__iproute2_hz_internal == 0)
                __iproute2_hz_internal = __get_hz();
	
	*raw = 1;

	if (*p) {
		*raw = 0;
                if (strcasecmp(p, "s") == 0 || strcasecmp(p, "sec")==0 ||
                    strcasecmp(p, "secs")==0)
                        t *= __iproute2_hz_internal;
                else if (strcasecmp(p, "ms") == 0 || strcasecmp(p, "msec")==0 ||
                         strcasecmp(p, "msecs") == 0)
                        t *= __iproute2_hz_internal/1000.0;
                else if (strcasecmp(p, "us") == 0 || strcasecmp(p, "usec")==0 ||
                         strcasecmp(p, "usecs") == 0)
                        t *= __iproute2_hz_internal/1000000.0;
                else if (strcasecmp(p, "ns") == 0 || strcasecmp(p, "nsec")==0 ||
                         strcasecmp(p, "nsecs") == 0)
                        t *= __iproute2_hz_internal/1000000000.0;
		else if (strcasecmp(p, "j") == 0 || strcasecmp(p, "hz") == 0 ||
			 strcasecmp(p,"jiffies") == 0)
			t *= 1.0; /* allow suffix, do nothing */
                else
                        return -1;
        }

	/* emulate ceil() without having to bring-in -lm and always be >= 1 */

	*jiffies = t;
	if (*jiffies < t)
		*jiffies += 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;
}

int get_addr_1(inet_prefix *addr, const char *name, int family)
{
	const char *cp;
	unsigned char *ap = (unsigned char*)addr->data;
	int i;

	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;
	addr->bytelen = 4;
	addr->bitlen = -1;
	for (cp=name, i=0; *cp; cp++) {
		if (*cp <= '9' && *cp >= '0') {
			ap[i] = 10*ap[i] + (*cp-'0');
			continue;
		}
		if (*cp == '.' && ++i <= 3)
			continue;
		return -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	*
	11	*
	12	* Changes:
	13	*
	14	* Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
	15	*/
	16
	17	#include <stdio.h>
	18	#include <stdlib.h>
	19	#include <unistd.h>
	20	#include <syslog.h>
	21	#include <fcntl.h>
	22	#include <sys/socket.h>
	23	#include <netinet/in.h>
	24	#include <string.h>
	25	#include <netdb.h>
	26	#include <arpa/inet.h>
	27	#include <resolv.h>
5dfe5561	28	#include <asm/types.h>
aba5acdf	29	#include <linux/pkt_sched.h>
90f93024 SH	30	#include <time.h>
	31	#include <sys/time.h>
	32
aba5acdf SH	33
	34	#include "utils.h"
	35
4094db72	36	int get_integer(int val, const char arg, int base)
aba5acdf SH	37	{
	38	long res;
	39	char *ptr;
	40
	41	if (!arg \|\| !*arg)
	42	return -1;
	43	res = strtol(arg, &ptr, base);
	44	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > INT_MAX \|\| res < INT_MIN)
	45	return -1;
	46	*val = res;
	47	return 0;
	48	}
	49
6b1ac654	50	int mask2bits(__u32 netmask)
4b270b17 SH	51	{
4b270b17 SH	52	unsigned bits = 0;
6b1ac654 SH	53	__u32 mask = ntohl(netmask);
6b1ac654 SH	54	__u32 host = ~mask;
4b270b17	55
6b1ac654 SH	56	/* a valid netmask must be 2^n - 1 */
	57	if ((host & (host + 1)) != 0)
	58	return -1;
4b270b17	59
6b1ac654 SH	60	for (; mask; mask <<= 1)
6b1ac654 SH	61	++bits;
4b270b17 SH	62	return bits;
	63	}
	64
5a0d1cbf AH	65	static int get_netmask(unsigned val, const char arg, int base)
	66	{
	67	inet_prefix addr;
	68
	69	if (!get_unsigned(val, arg, base))
	70	return 0;
	71
	72	/* try coverting dotted quad to CIDR */
6b1ac654 SH	73	if (!get_addr_1(&addr, arg, AF_INET) && addr.family == AF_INET) {
	74	int b = mask2bits(addr.data[0]);
	75
	76	if (b >= 0) {
	77	*val = b;
5a0d1cbf	78	return 0;
6b1ac654	79	}
5a0d1cbf AH	80	}
	81
	82	return -1;
	83	}
	84
4094db72	85	int get_unsigned(unsigned val, const char arg, int base)
aba5acdf SH	86	{
	87	unsigned long res;
	88	char *ptr;
	89
	90	if (!arg \|\| !*arg)
	91	return -1;
	92	res = strtoul(arg, &ptr, base);
	93	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > UINT_MAX)
	94	return -1;
	95	*val = res;
	96	return 0;
	97	}
	98
54e0b2e7 RJ	99	/*
	100	* get_jiffies is "translated" from a similar routine "get_time" in
	101	* tc_util.c. we don't use the exact same routine because tc passes
	102	* microseconds to the kernel and the callers of get_jiffies want
	103	* to pass jiffies, and have a different assumption for the units of
	104	* a "raw" number.
	105	*/
	106
	107	int get_jiffies(unsigned jiffies, const char arg, int base, int *raw)
	108	{
	109	double t;
	110	unsigned long res;
	111	char *p;
	112
	113	if (strchr(arg,'.') != NULL) {
	114	t = strtod(arg,&p);
	115	if (t < 0.0)
	116	return -1;
	117	}
	118	else {
	119	res = strtoul(arg,&p,base);
	120	if (res > UINT_MAX)
	121	return -1;
	122	t = (double)res;
	123	}
	124	if (p == arg)
	125	return -1;
	126
	127	if (__iproute2_hz_internal == 0)
	128	__iproute2_hz_internal = __get_hz();
	129
	130	*raw = 1;
	131
	132	if (*p) {
	133	*raw = 0;
	134	if (strcasecmp(p, "s") == 0 \|\| strcasecmp(p, "sec")==0 \|\|
	135	strcasecmp(p, "secs")==0)
	136	t *= __iproute2_hz_internal;
	137	else if (strcasecmp(p, "ms") == 0 \|\| strcasecmp(p, "msec")==0 \|\|
	138	strcasecmp(p, "msecs") == 0)
	139	t *= __iproute2_hz_internal/1000.0;
	140	else if (strcasecmp(p, "us") == 0 \|\| strcasecmp(p, "usec")==0 \|\|
	141	strcasecmp(p, "usecs") == 0)
	142	t *= __iproute2_hz_internal/1000000.0;
	143	else if (strcasecmp(p, "ns") == 0 \|\| strcasecmp(p, "nsec")==0 \|\|
	144	strcasecmp(p, "nsecs") == 0)
	145	t *= __iproute2_hz_internal/1000000000.0;
	146	else if (strcasecmp(p, "j") == 0 \|\| strcasecmp(p, "hz") == 0 \|\|
	147	strcasecmp(p,"jiffies") == 0)
	148	t = 1.0; / allow suffix, do nothing */
	149	else
	150	return -1;
	151	}
	152
	153	/* emulate ceil() without having to bring-in -lm and always be >= 1 */
	154
	155	*jiffies = t;
	156	if (*jiffies < t)
	157	*jiffies += 1;
	158
	159	return 0;
	160
	161	}
	162
c7699875	163	int get_u64(__u64 val, const char arg, int base)
	164	{
	165	unsigned long long res;
	166	char *ptr;
	167
	168	if (!arg \|\| !*arg)
	169	return -1;
	170	res = strtoull(arg, &ptr, base);
	171	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res == 0xFFFFFFFFULL)
	172	return -1;
	173	*val = res;
	174	return 0;
	175	}
	176
4094db72	177	int get_u32(__u32 val, const char arg, int base)
aba5acdf SH	178	{
	179	unsigned long res;
	180	char *ptr;
	181
	182	if (!arg \|\| !*arg)
	183	return -1;
	184	res = strtoul(arg, &ptr, base);
	185	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > 0xFFFFFFFFUL)
	186	return -1;
	187	*val = res;
	188	return 0;
	189	}
	190
4094db72	191	int get_u16(__u16 val, const char arg, int base)
aba5acdf SH	192	{
	193	unsigned long res;
	194	char *ptr;
	195
	196	if (!arg \|\| !*arg)
	197	return -1;
	198	res = strtoul(arg, &ptr, base);
	199	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > 0xFFFF)
	200	return -1;
	201	*val = res;
	202	return 0;
	203	}
	204
4094db72	205	int get_u8(__u8 val, const char arg, int base)
aba5acdf SH	206	{
	207	unsigned long res;
	208	char *ptr;
	209
	210	if (!arg \|\| !*arg)
	211	return -1;
	212	res = strtoul(arg, &ptr, base);
	213	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > 0xFF)
	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
4094db72	247	int get_addr_1(inet_prefix addr, const char name, int family)
aba5acdf	248	{
4094db72	249	const char *cp;
aba5acdf SH	250	unsigned char ap = (unsigned char)addr->data;
	251	int i;
	252
	253	memset(addr, 0, sizeof(*addr));
	254
	255	if (strcmp(name, "default") == 0 \|\|
	256	strcmp(name, "all") == 0 \|\|
	257	strcmp(name, "any") == 0) {
	258	if (family == AF_DECnet)
	259	return -1;
	260	addr->family = family;
	261	addr->bytelen = (family == AF_INET6 ? 16 : 4);
	262	addr->bitlen = -1;
	263	return 0;
	264	}
	265
	266	if (strchr(name, ':')) {
	267	addr->family = AF_INET6;
	268	if (family != AF_UNSPEC && family != AF_INET6)
	269	return -1;
	270	if (inet_pton(AF_INET6, name, addr->data) <= 0)
	271	return -1;
	272	addr->bytelen = 16;
	273	addr->bitlen = -1;
	274	return 0;
	275	}
	276
	277	if (family == AF_DECnet) {
	278	struct dn_naddr dna;
	279	addr->family = AF_DECnet;
	280	if (dnet_pton(AF_DECnet, name, &dna) <= 0)
	281	return -1;
	282	memcpy(addr->data, dna.a_addr, 2);
	283	addr->bytelen = 2;
	284	addr->bitlen = -1;
	285	return 0;
	286	}
	287
	288	addr->family = AF_INET;
	289	if (family != AF_UNSPEC && family != AF_INET)
	290	return -1;
	291	addr->bytelen = 4;
	292	addr->bitlen = -1;
	293	for (cp=name, i=0; *cp; cp++) {
	294	if (cp <= '9' && cp >= '0') {
	295	ap[i] = 10ap[i] + (cp-'0');
	296	continue;
	297	}
	298	if (*cp == '.' && ++i <= 3)
	299	continue;
	300	return -1;
	301	}
	302	return 0;
	303	}
	304
fb9b1d0f	305	int get_prefix_1(inet_prefix dst, char arg, int family)
aba5acdf SH	306	{
	307	int err;
	308	unsigned plen;
	309	char *slash;
	310
	311	memset(dst, 0, sizeof(*dst));
	312
	313	if (strcmp(arg, "default") == 0 \|\|
	314	strcmp(arg, "any") == 0 \|\|
	315	strcmp(arg, "all") == 0) {
	316	if (family == AF_DECnet)
	317	return -1;
	318	dst->family = family;
	319	dst->bytelen = 0;
	320	dst->bitlen = 0;
	321	return 0;
	322	}
	323
	324	slash = strchr(arg, '/');
	325	if (slash)
	326	*slash = 0;
fb9b1d0f	327
aba5acdf SH	328	err = get_addr_1(dst, arg, family);
	329	if (err == 0) {
	330	switch(dst->family) {
	331	case AF_INET6:
	332	dst->bitlen = 128;
	333	break;
	334	case AF_DECnet:
	335	dst->bitlen = 16;
	336	break;
	337	default:
	338	case AF_INET:
	339	dst->bitlen = 32;
	340	}
	341	if (slash) {
5a0d1cbf AH	342	if (get_netmask(&plen, slash+1, 0)
5a0d1cbf AH	343	\|\| plen > dst->bitlen) {
aba5acdf SH	344	err = -1;
	345	goto done;
	346	}
f082b64f	347	dst->flags \|= PREFIXLEN_SPECIFIED;
aba5acdf SH	348	dst->bitlen = plen;
	349	}
	350	}
	351	done:
	352	if (slash)
	353	*slash = '/';
	354	return err;
	355	}
	356
c7699875	357	int get_addr(inet_prefix dst, const char arg, int family)
aba5acdf SH	358	{
	359	if (family == AF_PACKET) {
	360	fprintf(stderr, "Error: \"%s\" may be inet address, but it is not allowed in this context.\n", arg);
	361	exit(1);
	362	}
	363	if (get_addr_1(dst, arg, family)) {
	364	fprintf(stderr, "Error: an inet address is expected rather than \"%s\".\n", arg);
	365	exit(1);
	366	}
	367	return 0;
	368	}
	369
fb9b1d0f	370	int get_prefix(inet_prefix dst, char arg, int family)
aba5acdf SH	371	{
	372	if (family == AF_PACKET) {
	373	fprintf(stderr, "Error: \"%s\" may be inet prefix, but it is not allowed in this context.\n", arg);
	374	exit(1);
	375	}
	376	if (get_prefix_1(dst, arg, family)) {
	377	fprintf(stderr, "Error: an inet prefix is expected rather than \"%s\".\n", arg);
	378	exit(1);
	379	}
	380	return 0;
	381	}
	382
c7699875	383	__u32 get_addr32(const char *name)
aba5acdf SH	384	{
	385	inet_prefix addr;
	386	if (get_addr_1(&addr, name, AF_INET)) {
	387	fprintf(stderr, "Error: an IP address is expected rather than \"%s\"\n", name);
	388	exit(1);
	389	}
	390	return addr.data[0];
	391	}
	392
4094db72	393	void incomplete_command(void)
aba5acdf SH	394	{
	395	fprintf(stderr, "Command line is not complete. Try option \"help\"\n");
	396	exit(-1);
	397	}
	398
c7699875	399	void missarg(const char *key)
	400	{
	401	fprintf(stderr, "Error: argument \"%s\" is required\n", key);
	402	exit(-1);
	403	}
	404
4094db72	405	void invarg(const char msg, const char arg)
aba5acdf SH	406	{
	407	fprintf(stderr, "Error: argument \"%s\" is wrong: %s\n", arg, msg);
	408	exit(-1);
	409	}
	410
4094db72	411	void duparg(const char key, const char arg)
aba5acdf SH	412	{
	413	fprintf(stderr, "Error: duplicate \"%s\": \"%s\" is the second value.\n", key, arg);
	414	exit(-1);
	415	}
	416
4094db72	417	void duparg2(const char key, const char arg)
aba5acdf SH	418	{
	419	fprintf(stderr, "Error: either \"%s\" is duplicate, or \"%s\" is a garbage.\n", key, arg);
	420	exit(-1);
	421	}
	422
4094db72	423	int matches(const char cmd, const char pattern)
aba5acdf SH	424	{
	425	int len = strlen(cmd);
	426	if (len > strlen(pattern))
	427	return -1;
	428	return memcmp(pattern, cmd, len);
	429	}
	430
4094db72	431	int inet_addr_match(const inet_prefix a, const inet_prefix b, int bits)
aba5acdf	432	{
9626dfd5 SH	433	const __u32 *a1 = a->data;
9626dfd5 SH	434	const __u32 *a2 = b->data;
aba5acdf SH	435	int words = bits >> 0x05;
	436
	437	bits &= 0x1f;
	438
	439	if (words)
	440	if (memcmp(a1, a2, words << 2))
	441	return -1;
	442
	443	if (bits) {
	444	__u32 w1, w2;
	445	__u32 mask;
	446
	447	w1 = a1[words];
	448	w2 = a2[words];
	449
	450	mask = htonl((0xffffffff) << (0x20 - bits));
	451
	452	if ((w1 ^ w2) & mask)
	453	return 1;
	454	}
	455
	456	return 0;
	457	}
	458
	459	int __iproute2_hz_internal;
	460
	461	int __get_hz(void)
	462	{
	463	char name[1024];
	464	int hz = 0;
	465	FILE *fp;
	466
	467	if (getenv("HZ"))
	468	return atoi(getenv("HZ")) ? : HZ;
	469
	470	if (getenv("PROC_NET_PSCHED")) {
	471	snprintf(name, sizeof(name)-1, "%s", getenv("PROC_NET_PSCHED"));
c7699875	472	} else if (getenv("PROC_ROOT")) {
aba5acdf SH	473	snprintf(name, sizeof(name)-1, "%s/net/psched", getenv("PROC_ROOT"));
	474	} else {
	475	strcpy(name, "/proc/net/psched");
	476	}
	477	fp = fopen(name, "r");
	478
	479	if (fp) {
	480	unsigned nom, denom;
	481	if (fscanf(fp, "%08x%08x%08x%08x", &nom, &denom) == 2)
	482	if (nom == 1000000)
	483	hz = denom;
	484	fclose(fp);
	485	}
	486	if (hz)
	487	return hz;
	488	return HZ;
	489	}
	490
5e8bc631	491	int __iproute2_user_hz_internal;
	492
	493	int __get_user_hz(void)
	494	{
	495	return sysconf(_SC_CLK_TCK);
	496	}
	497
4094db72	498	const char rt_addr_n2a(int af, int len, const void addr, char *buf, int buflen)
aba5acdf SH	499	{
	500	switch (af) {
	501	case AF_INET:
	502	case AF_INET6:
	503	return inet_ntop(af, addr, buf, buflen);
	504	case AF_IPX:
	505	return ipx_ntop(af, addr, buf, buflen);
	506	case AF_DECnet:
	507	{
	508	struct dn_naddr dna = { 2, { 0, 0, }};
	509	memcpy(dna.a_addr, addr, 2);
	510	return dnet_ntop(af, &dna, buf, buflen);
	511	}
	512	default:
	513	return "???";
	514	}
	515	}
	516
	517	#ifdef RESOLVE_HOSTNAMES
	518	struct namerec
	519	{
	520	struct namerec *next;
7dec1bf8	521	const char *name;
aba5acdf	522	inet_prefix addr;
aba5acdf SH	523	};
aba5acdf SH	524
7dec1bf8 SH	525	#define NHASH 257
7dec1bf8 SH	526	static struct namerec *nht[NHASH];
aba5acdf	527
7dec1bf8	528	static const char resolve_address(const void addr, int len, int af)
aba5acdf SH	529	{
	530	struct namerec *n;
	531	struct hostent *h_ent;
	532	unsigned hash;
	533	static int notfirst;
	534
	535
	536	if (af == AF_INET6 && ((__u32*)addr)[0] == 0 &&
	537	((__u32)addr)[1] == 0 && ((__u32)addr)[2] == htonl(0xffff)) {
	538	af = AF_INET;
	539	addr += 12;
	540	len = 4;
	541	}
	542
7dec1bf8	543	hash = (__u32 )(addr + len - 4) % NHASH;
aba5acdf SH	544
	545	for (n = nht[hash]; n; n = n->next) {
	546	if (n->addr.family == af &&
	547	n->addr.bytelen == len &&
	548	memcmp(n->addr.data, addr, len) == 0)
	549	return n->name;
	550	}
	551	if ((n = malloc(sizeof(*n))) == NULL)
	552	return NULL;
	553	n->addr.family = af;
	554	n->addr.bytelen = len;
	555	n->name = NULL;
	556	memcpy(n->addr.data, addr, len);
	557	n->next = nht[hash];
	558	nht[hash] = n;
	559	if (++notfirst == 1)
	560	sethostent(1);
	561	fflush(stdout);
	562
c7699875	563	if ((h_ent = gethostbyaddr(addr, len, af)) != NULL)
aba5acdf SH	564	n->name = strdup(h_ent->h_name);
	565
	566	/* Even if we fail, "negative" entry is remembered. */
	567	return n->name;
	568	}
	569	#endif
	570
	571
c7699875	572	const char format_host(int af, int len, const void addr,
4094db72	573	char *buf, int buflen)
aba5acdf SH	574	{
	575	#ifdef RESOLVE_HOSTNAMES
	576	if (resolve_hosts) {
7dec1bf8 SH	577	const char *n;
7dec1bf8 SH	578
aba5acdf SH	579	if (len <= 0) {
	580	switch (af) {
	581	case AF_INET:
	582	len = 4;
	583	break;
	584	case AF_INET6:
	585	len = 16;
	586	break;
	587	case AF_IPX:
	588	len = 10;
	589	break;
	590	#ifdef AF_DECnet
	591	/* I see no reasons why gethostbyname
	592	may not work for DECnet */
	593	case AF_DECnet:
	594	len = 2;
	595	break;
	596	#endif
	597	default: ;
	598	}
	599	}
	600	if (len > 0 &&
	601	(n = resolve_address(addr, len, af)) != NULL)
	602	return n;
	603	}
	604	#endif
	605	return rt_addr_n2a(af, len, addr, buf, buflen);
	606	}
	607
	608
f332d169	609	char hexstring_n2a(const __u8 str, int len, char *buf, int blen)
aba5acdf	610	{
f332d169	611	char *ptr = buf;
aba5acdf SH	612	int i;
	613
	614	for (i=0; i<len; i++) {
	615	if (blen < 3)
	616	break;
	617	sprintf(ptr, "%02x", str[i]);
	618	ptr += 2;
	619	blen -= 2;
	620	if (i != len-1 && blen > 1) {
	621	*ptr++ = ':';
	622	blen--;
	623	}
	624	}
	625	return buf;
	626	}
	627
f332d169	628	__u8* hexstring_a2n(const char str, __u8 buf, int blen)
aba5acdf SH	629	{
	630	int cnt = 0;
	631
	632	for (;;) {
	633	unsigned acc;
	634	char ch;
	635
	636	acc = 0;
	637
	638	while ((ch = *str) != ':' && ch != 0) {
	639	if (ch >= '0' && ch <= '9')
	640	ch -= '0';
	641	else if (ch >= 'a' && ch <= 'f')
	642	ch -= 'a'-10;
	643	else if (ch >= 'A' && ch <= 'F')
	644	ch -= 'A'-10;
	645	else
	646	return NULL;
	647	acc = (acc<<4) + ch;
	648	str++;
	649	}
	650
	651	if (acc > 255)
	652	return NULL;
	653	if (cnt < blen) {
	654	buf[cnt] = acc;
	655	cnt++;
	656	}
	657	if (ch == 0)
	658	break;
	659	++str;
	660	}
	661	if (cnt < blen)
	662	memset(buf+cnt, 0, blen-cnt);
	663	return buf;
	664	}
90f93024 SH	665
	666	int print_timestamp(FILE *fp)
	667	{
	668	struct timeval tv;
	669	char *tstr;
	670
	671	memset(&tv, 0, sizeof(tv));
	672	gettimeofday(&tv, NULL);
	673
	674	tstr = asctime(localtime(&tv.tv_sec));
	675	tstr[strlen(tstr)-1] = 0;
	676	fprintf(fp, "Timestamp: %s %lu usec\n", tstr, tv.tv_usec);
	677	return 0;
	678	}
351efcde SH	679
	680	int cmdlineno;
	681
	682	/* Like glibc getline but handle continuation lines and comments */
d21e8835	683	ssize_t getcmdline(char *linep, size_t lenp, FILE *in)
351efcde	684	{
d21e8835	685	ssize_t cc;
351efcde	686	char *cp;
ae665a52	687
351efcde SH	688	if ((cc = getline(linep, lenp, in)) < 0)
	689	return cc; /* eof or error */
	690	++cmdlineno;
	691
	692	cp = strchr(*linep, '#');
ae665a52	693	if (cp)
351efcde	694	*cp = '\0';
ae665a52	695
351efcde SH	696	while ((cp = strstr(*linep, "\\\n")) != NULL) {
	697	char *line1 = NULL;
	698	size_t len1 = 0;
	699	size_t cc1;
	700
	701	if ((cc1 = getline(&line1, &len1, in)) < 0) {
	702	fprintf(stderr, "Missing continuation line\n");
	703	return cc1;
	704	}
	705
	706	++cmdlineno;
	707	*cp = 0;
	708
	709	cp = strchr(line1, '#');
ae665a52	710	if (cp)
351efcde SH	711	*cp = '\0';
351efcde SH	712
d21e8835 AH	713	lenp = strlen(linep) + strlen(line1) + 1;
d21e8835 AH	714	linep = realloc(linep, *lenp);
351efcde SH	715	if (!*linep) {
351efcde SH	716	fprintf(stderr, "Out of memory\n");
d21e8835	717	*lenp = 0;
351efcde SH	718	return -1;
	719	}
	720	cc += cc1 - 2;
	721	strcat(*linep, line1);
	722	free(line1);
	723	}
	724	return cc;
	725	}
	726
	727	/* split command line into argument vector */
	728	int makeargs(char line, char argv[], int maxargs)
	729	{
	730	static const char ws[] = " \t\r\n";
	731	char *cp;
	732	int argc = 0;
	733
	734	for (cp = strtok(line, ws); cp; cp = strtok(NULL, ws)) {
	735	if (argc >= (maxargs - 1)) {
	736	fprintf(stderr, "Too many arguments to command\n");
	737	exit(1);
	738	}
	739	argv[argc++] = cp;
	740	}
	741	argv[argc] = NULL;
	742
	743	return argc;
	744	}