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syscalls may return sockaddr shorter than sizeof(struct sockaddr) on Linux.

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Tomoyuki Sahara
2014-12-26 13:27:39 +09:00
parent a960a6f931
commit a09858af61
1 changed files with 6 additions and 0 deletions
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src/socket.c
+6
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@@ -549,9 +549,15 @@ mrb_socket_sockaddr_family(mrb_state *mrb, mrb_value klass)
mrb_value sa;
mrb_get_args(mrb, "S", &sa);
#ifdef __linux__
if (RSTRING_LEN(sa) < offsetof(struct sockaddr, sa_family) + sizeof(sa_family_t)) {
mrb_raisef(mrb, E_SOCKET_ERROR, "invalid sockaddr (too short)");
}
#else
if (RSTRING_LEN(sa) < sizeof(struct sockaddr)) {
mrb_raisef(mrb, E_SOCKET_ERROR, "invalid sockaddr (too short)");
}
#endif
return mrb_fixnum_value(((struct sockaddr *)RSTRING_PTR(sa))->sa_family);
}