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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
Download patch file Download diff file Expand all files Collapse all files

8
libc/sock/setsockopt.c
View file

@ -49,6 +49,10 @@ static bool setsockopt_polyfill(int *optname) {
* @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 `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 getsockopt()
*/
@ -56,8 +60,8 @@ int setsockopt(int fd, int level, int optname, const void *optval,
uint32_t optlen) {
int e, rc;
if (!optname) {
rc = enosys(); /* see libc/sysv/consts.sh */
if (level == -1 || !optname) {
rc = enoprotoopt(); /* see libc/sysv/consts.sh */
} else if ((!optval && optlen) ||
(IsAsan() && !__asan_is_valid(optval, optlen))) {
rc = efault();