TLS extension limit check fixes.
Fix limit checks in ssl_add_clienthello_tlsext and
ssl_add_serverhello_tlsext.
Some of the limit checks reference p rather than ret. p is the original
buffer position, not the current one. Fix those and rename p to orig so
it's clearer.
diff --git a/ssl/ssl_locl.h b/ssl/ssl_locl.h
index ad938b6..d61a03c 100644
--- a/ssl/ssl_locl.h
+++ b/ssl/ssl_locl.h
@@ -1298,8 +1298,8 @@
const unsigned char *l1, size_t l1len,
const unsigned char *l2, size_t l2len,
int nmatch);
-unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit);
-unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit);
+unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *buf, unsigned char *limit, size_t header_len);
+unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *buf, unsigned char *limit);
int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **data, unsigned char *d, int n);
int ssl_check_clienthello_tlsext_late(SSL *s);
int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **data, unsigned char *d, int n);
