mirror of
https://github.com/sheumann/hush.git
synced 2024-12-23 05:29:58 +00:00
369 lines
6.8 KiB
C
369 lines
6.8 KiB
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 "./linux/pkt_sched.h"
|
|
|
|
#include "utils.h"
|
|
|
|
int get_integer(int *val, 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 get_unsigned(unsigned *val, 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;
|
|
}
|
|
|
|
int get_u32(__u32 *val, 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, 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, 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, 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, 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, char *name, int family)
|
|
{
|
|
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) {
|
|
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;
|
|
}
|
|
|
|
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) {
|
|
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;
|
|
default:
|
|
case AF_INET:
|
|
dst->bitlen = 32;
|
|
}
|
|
if (slash) {
|
|
if (get_integer(&plen, slash+1, 0) || plen > dst->bitlen) {
|
|
err = -1;
|
|
goto done;
|
|
}
|
|
dst->bitlen = plen;
|
|
}
|
|
}
|
|
done:
|
|
if (slash)
|
|
*slash = '/';
|
|
return err;
|
|
}
|
|
|
|
int get_addr(inet_prefix *dst, 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(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()
|
|
{
|
|
fprintf(stderr, "Command line is not complete. Try option \"help\"\n");
|
|
exit(-1);
|
|
}
|
|
|
|
void invarg(char *msg, char *arg)
|
|
{
|
|
fprintf(stderr, "Error: argument \"%s\" is wrong: %s\n", arg, msg);
|
|
exit(-1);
|
|
}
|
|
|
|
void duparg(char *key, char *arg)
|
|
{
|
|
fprintf(stderr, "Error: duplicate \"%s\": \"%s\" is the second value.\n", key, arg);
|
|
exit(-1);
|
|
}
|
|
|
|
void duparg2(char *key, char *arg)
|
|
{
|
|
fprintf(stderr, "Error: either \"%s\" is duplicate, or \"%s\" is a garbage.\n", key, arg);
|
|
exit(-1);
|
|
}
|
|
|
|
int matches(char *cmd, char *pattern)
|
|
{
|
|
int len = strlen(cmd);
|
|
if (len > strlen(pattern))
|
|
return -1;
|
|
return memcmp(pattern, cmd, len);
|
|
}
|
|
|
|
int inet_addr_match(inet_prefix *a, inet_prefix *b, int bits)
|
|
{
|
|
__u32 *a1 = a->data;
|
|
__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)
|
|
{
|
|
int hz = 0;
|
|
FILE *fp = fopen("/proc/net/psched", "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;
|
|
}
|
|
|
|
const char *rt_addr_n2a(int af, int len, void *addr, char *buf, int buflen)
|
|
{
|
|
switch (af) {
|
|
case AF_INET:
|
|
case AF_INET6:
|
|
return inet_ntop(af, addr, buf, buflen);
|
|
default:
|
|
return "???";
|
|
}
|
|
}
|
|
|
|
|
|
const char *format_host(int af, int len, void *addr, char *buf, int buflen)
|
|
{
|
|
#ifdef RESOLVE_HOSTNAMES
|
|
if (resolve_hosts) {
|
|
struct hostent *h_ent;
|
|
if (len <= 0) {
|
|
switch (af) {
|
|
case AF_INET:
|
|
len = 4;
|
|
break;
|
|
case AF_INET6:
|
|
len = 16;
|
|
break;
|
|
default: ;
|
|
}
|
|
}
|
|
if (len > 0 &&
|
|
(h_ent = gethostbyaddr(addr, len, af)) != NULL) {
|
|
snprintf(buf, buflen-1, "%s", h_ent->h_name);
|
|
return buf;
|
|
}
|
|
}
|
|
#endif
|
|
return rt_addr_n2a(af, len, addr, buf, buflen);
|
|
}
|