some tls_eap optimizations

[strongswan.git] / src / libtls / tls_eap.c

diff --git a/src/libtls/tls_eap.c b/src/libtls/tls_eap.c
index 1354fa1..6134318 100644 (file)
--- a/src/libtls/tls_eap.c
+++ b/src/libtls/tls_eap.c
@@ -150,10 +150,12 @@ METHOD(tls_eap_t, initiate, status_t,
  */
 static status_t process_pkt(private_tls_eap_t *this, eap_tls_packet_t *pkt)
 {
-       u_int32_t msg_len;
        u_int16_t pkt_len;
+       u_int32_t msg_len;
+       size_t msg_len_offset = 0;
 
        pkt_len = untoh16(&pkt->length);
+
        if (pkt->flags & EAP_TLS_LENGTH)
        {
                if (pkt_len < sizeof(eap_tls_packet_t) + sizeof(msg_len))
@@ -169,11 +171,11 @@ static status_t process_pkt(private_tls_eap_t *this, eap_tls_packet_t *pkt)
                                 this->type, msg_len);
                        return FAILED;
                }
-               return this->tls->process(this->tls, (char*)(pkt + 1) + sizeof(msg_len),
-                                               pkt_len - sizeof(eap_tls_packet_t) - sizeof(msg_len));
+               msg_len_offset = sizeof(msg_len);
        }
-       return this->tls->process(this->tls, (char*)(pkt + 1),
-                                                         pkt_len - sizeof(eap_tls_packet_t));
+
+       return this->tls->process(this->tls, (char*)(pkt + 1) + msg_len_offset,
+                                          pkt_len - sizeof(eap_tls_packet_t) - msg_len_offset);
 }
 
 /**
@@ -183,7 +185,7 @@ static status_t build_pkt(private_tls_eap_t *this, chunk_t *out)
 {
        char buf[this->frag_size];
        eap_tls_packet_t *pkt;
-       size_t len, reclen;
+       size_t len, reclen, msg_len_offset;
        status_t status;
        char *kind;
 
@@ -215,15 +217,16 @@ static status_t build_pkt(private_tls_eap_t *this, chunk_t *out)
        if (this->first_fragment)
        {
                len = sizeof(buf) - sizeof(eap_tls_packet_t) - sizeof(u_int32_t);
-               status = this->tls->build(this->tls, buf + sizeof(eap_tls_packet_t) +
-                                                                 sizeof(u_int32_t), &len, &reclen);
+               msg_len_offset = sizeof(u_int32_t);
        }
        else
        {
                len = sizeof(buf) - sizeof(eap_tls_packet_t);
-               status = this->tls->build(this->tls, buf + sizeof(eap_tls_packet_t),
-                                                                 &len, &reclen);
+               msg_len_offset = 0;
        }
+       status = this->tls->build(this->tls, buf + sizeof(eap_tls_packet_t) +
+                                                                                msg_len_offset, &len, &reclen);
+
        switch (status)
        {
                case NEED_MORE: