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authorJan Engelhardt <jengelh@medozas.de>2009-02-21 04:00:21 +0100
committerJan Engelhardt <jengelh@medozas.de>2009-02-21 04:01:48 +0100
commitda68957303dea58632466d79d52f83bcbbca8925 (patch)
treec8a85826721bfd2bcc81680ff11bada4a137d282 /extensions/libip6t_policy.c
parentafe6b357db60c7d70379a27360c10a352bf55203 (diff)
libxt_policy: use bounded strtoui
reqid and SPI can only have a value in the range 0..UINT32_MAX, not the entire range of the "long" type. Also throw an error if the incoming string does not look like a pure number. "Replaces" commit 6db2ded2f22a7e78743c86af523b8430876582e9. Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Diffstat (limited to 'extensions/libip6t_policy.c')
-rw-r--r--extensions/libip6t_policy.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/extensions/libip6t_policy.c b/extensions/libip6t_policy.c
index 0016da29..5106c28e 100644
--- a/extensions/libip6t_policy.c
+++ b/extensions/libip6t_policy.c
@@ -156,7 +156,7 @@ static int policy_parse(int c, char **argv, int invert, unsigned int *flags,
struct ip6t_policy_info *info = (void *)(*match)->data;
struct ip6t_policy_elem *e = &info->pol[info->len];
struct in6_addr *addr = NULL, mask;
- unsigned int naddr = 0;
+ unsigned int naddr = 0, num;
int mode;
xtables_check_inverse(optarg, &invert, &optind, 0);
@@ -197,7 +197,9 @@ static int policy_parse(int c, char **argv, int invert, unsigned int *flags,
e->match.reqid = 1;
e->invert.reqid = invert;
- e->reqid = strtoul(argv[optind-1], NULL, 10);
+ if (!xtables_strtoui(optarg, NULL, &num, 0, UINT32_MAX))
+ xtables_param_act(XTF_BAD_VALUE, "policy", "--reqid", optarg);
+ e->reqid = num;
break;
case '5':
if (e->match.spi)
@@ -206,7 +208,9 @@ static int policy_parse(int c, char **argv, int invert, unsigned int *flags,
e->match.spi = 1;
e->invert.spi = invert;
- e->spi = strtoul(argv[optind-1], NULL, 0x10);
+ if (!xtables_strtoui(optarg, NULL, &num, 0, UINT32_MAX))
+ xtables_param_act(XTF_BAD_VALUE, "policy", "--spi", optarg);
+ e->spi = num;
break;
case '6':
if (e->match.saddr)