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Diffstat (limited to 'ext')
-rw-r--r--ext/socket/option.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/ext/socket/option.c b/ext/socket/option.c
index 7b63058..e98492f 100644
--- a/ext/socket/option.c
+++ b/ext/socket/option.c
@@ -920,7 +920,8 @@ inspect_tcpi_msec(VALUE ret, const char *prefix, u_int32_t t)
static int
inspect_tcp_info(int level, int optname, VALUE data, VALUE ret)
{
- if (RSTRING_LEN(data) == sizeof(struct tcp_info)) {
+ size_t actual_size = RSTRING_LEN(data);
+ if (sizeof(struct tcp_info) <= actual_size) {
struct tcp_info s;
memcpy((char*)&s, RSTRING_PTR(data), sizeof(s));
#ifdef HAVE_STRUCT_TCP_INFO_TCPI_STATE
@@ -1063,6 +1064,8 @@ inspect_tcp_info(int level, int optname, VALUE data, VALUE ret)
#ifdef HAVE_STRUCT_TCP_INFO_TCPI_SND_ZEROWIN
rb_str_catf(ret, " snd_zerowin=%u", s.tcpi_snd_zerowin); /* FreeBSD */
#endif
+ if (sizeof(struct tcp_info) < actual_size)
+ rb_str_catf(ret, " (%u bytes too long)", (unsigned)(actual_size - sizeof(struct tcp_info)));
return 1;
}
else {