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, int *al);
-unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit, int *al);
+unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *buf, unsigned char *limit, int *al);
+unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *buf, unsigned char *limit, int *al);
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);