[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 <limits.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <asm/types.h>
#include <linux/pkt_sched.h>
#include <linux/param.h>
#include <time.h>
#include <sys/time.h>
#include <errno.h>


#include "utils.h"

int get_integer(int *val, const char *arg, int base)
{
	long res;
	char *ptr;

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