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Add the check of the table number.

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This commit is contained in:
Roman Kurakin 2008-09-21 21:46:56 +00:00
parent f7b5554eb7
commit eba1dd2124
1 changed files with 17 additions and 0 deletions
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17
sbin/ipfw/ipfw2.c
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@ -5870,7 +5870,21 @@ table_handler(int ac, char *av[])
{
ipfw_table_entry ent;
int do_add;
size_t len;
char *p;
uint32_t tables_max;
len = sizeof(a);
if (sysctlbyname("net.inet.ip.fw.tables_max", &tables_max, &len,
NULL, 0) == -1) {
#ifdef IPFW_TABLES_MAX
warn("Warn: Failed to get the max tables number via sysctl. "
"Using the compiled in defaults. \nThe reason was");
tables_max = IPFW_TABLES_MAX;
#else
errx(1, "Failed sysctlbyname(\"net.inet.ip.fw.tables_max\")");
#endif
}
ac--; av++;
if (ac && isdigit(**av)) {
@ -5878,6 +5892,9 @@ table_handler(int ac, char *av[])
ac--; av++;
} else
errx(EX_USAGE, "table number required");
if (ent.tbl >= tables_max)
errx(EX_USAGE, "The table number exceeds the maximum allowed "
"value (%d)", tables_max - 1);
NEED1("table needs command");
if (_substrcmp(*av, "add") == 0 ||
_substrcmp(*av, "delete") == 0) {