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Add tcp syn packet fingerprinting to redbean

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This change also fixes bugs in enoprotoopt reporting with setsockopt and
getsockopt error returns.
This commit is contained in:
Justine Tunney 2022-07-17 02:40:39 -07:00
parent 866b21a151
commit 4d25f8c3c9
75 changed files with 1551 additions and 115 deletions
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10
libc/sock/getsockopt.c
View file

@ -32,6 +32,10 @@
* @param optname can be SO_{REUSE{PORT,ADDR},KEEPALIVE,etc.} etc.
* @return 0 on success, or -1 w/ errno
* @error ENOPROTOOPT for unknown (level,optname)
* @error EINVAL if `out_optlen` is invalid somehow
* @error ENOTSOCK if `fd` is valid but not a socket
* @error EBADF if `fd` isn't valid
* @error EFAULT if optval memory isn't valid
* @see libc/sysv/consts.sh for tuning catalogue
* @see setsockopt()
*/
@ -39,10 +43,8 @@ int getsockopt(int fd, int level, int optname, void *out_opt_optval,
uint32_t *out_optlen) {
int rc;
if (!level || !optname) {
rc = enoprotoopt(); /* our sysvconsts definition */
} else if (optname == -1) {
rc = 0; /* our sysvconsts definition */
if (level == -1 || !optname) {
rc = enoprotoopt(); /* see libc/sysv/consts.sh */
} else if (IsAsan() && (out_opt_optval && out_optlen &&
(!__asan_is_valid(out_optlen, sizeof(uint32_t)) ||
!__asan_is_valid(out_opt_optval, *out_optlen)))) {