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MINOR: contrib: make the iprange tool grep for addresses

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The iprange tool is handy for transforming network range formats, but
it's common to need a tool for running quick checks on the output.
The tool now supports a list of addresses on the command line, and it
will only output those which match. It's absolutely inefficient but is
handy for debugging.
This commit is contained in:
Willy Tarreau 2012-12-13 00:11:02 +01:00
parent 0cae4b3218
commit 04281bd1ad
1 changed files with 23 additions and 9 deletions
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32
contrib/iprange/iprange.c
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@ -38,13 +38,13 @@ static const char *get_ipv4_addr(unsigned int addr)
/* print all networks present between address <low> and address <high> in
* cidr format, followed by <eol>.
*/
static void convert_range(unsigned int low, unsigned int high, const char *eol)
static void convert_range(unsigned int low, unsigned int high, const char *eol, const char *pfx)
{
int bit;
if (low == high) {
/* single value */
printf("%s%s\n", get_ipv4_addr(low), eol);
printf("%s%s%s%s\n", pfx?pfx:"", pfx?" ":"", get_ipv4_addr(low), eol);
return;
}
else if (low > high) {
@ -55,7 +55,7 @@ static void convert_range(unsigned int low, unsigned int high, const char *eol)
if (low == high + 1) {
/* full range */
printf("0.0.0.0/0%s\n", eol);
printf("%s%s0.0.0.0/0%s\n", pfx?pfx:"", pfx?" ":"", eol);
return;
}
//printf("low=%08x high=%08x\n", low, high);
@ -65,7 +65,7 @@ static void convert_range(unsigned int low, unsigned int high, const char *eol)
/* enlarge mask */
if (low & (1 << bit)) {
/* can't aggregate anymore, dump and retry from the same bit */
printf("%s/%d%s\n", get_ipv4_addr(low), 32-bit, eol);
printf("%s%s%s/%d%s\n", pfx?pfx:"", pfx?" ":"", get_ipv4_addr(low), 32-bit, eol);
low += (1 << bit);
}
else {
@ -82,7 +82,7 @@ static void convert_range(unsigned int low, unsigned int high, const char *eol)
if ((high - low + 1) & (1 << bit)) {
/* large bit accepted, dump and go on from the same bit */
//printf("max: %08x/%d\n", low, 32-bit);
printf("%s/%d%s\n", get_ipv4_addr(low), 32-bit, eol);
printf("%s%s%s/%d%s\n", pfx?pfx:"", pfx?" ":"", get_ipv4_addr(low), 32-bit, eol);
low += (1 << bit);
}
else {
@ -96,7 +96,7 @@ static void convert_range(unsigned int low, unsigned int high, const char *eol)
static void usage(const char *argv0)
{
fprintf(stderr,
"Usage: %s < iplist.csv\n"
"Usage: %s [<addr> ...] < iplist.csv\n"
"\n"
"This program reads lines starting by two IP addresses and outputs them with\n"
"the two IP addresses replaced by a netmask covering the range between these\n"
@ -105,6 +105,9 @@ static void usage(const char *argv0)
"stripped, and lines beginning with a sharp character ('#') are ignored. The\n"
"IP addresses may be either in the dotted format or represented as a 32-bit\n"
"integer value in network byte order.\n"
"\n"
"For each optional <addr> specified, only the network it belongs to is returned,\n"
"prefixed with the <addr> value.\n"
"\n", argv0);
}
@ -114,9 +117,9 @@ main(int argc, char **argv)
int l, lnum;
char *lb, *le, *hb, *he, *err;
struct in_addr src_addr, dst_addr;
unsigned int sa, da;
unsigned int sa, da, ta;
if (argc > 1) {
if (argc > 1 && *argv[1] == '-') {
usage(argv[0]);
exit(1);
}
@ -182,6 +185,17 @@ main(int argc, char **argv)
sa = htonl(src_addr.s_addr);
da = htonl(dst_addr.s_addr);
convert_range(sa, da, he);
if (argc > 1) {
for (l = 1; l < argc; l++) {
if (inet_pton(AF_INET, argv[l], &dst_addr) <= 0)
continue;
ta = htonl(dst_addr.s_addr);
if ((sa <= ta && ta <= da) || (da <= ta && ta <= sa))
convert_range(sa, da, he, argv[l]);
}
}
else {
convert_range(sa, da, he, NULL);
}
}
}