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DTLS Nonblocking Updates

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Modify the DtlsMsgPoolSend() function to keep track of the last message
retransmit. If a write would block, it allows the retransmit pick up
where it left off.
This commit is contained in:
John Safranek
2018-12-18 16:19:52 -08:00
parent cc3c2ef683
commit c282f5b726
2 changed files with 6 additions and 1 deletions
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6
src/internal.c
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@@ -6057,6 +6057,7 @@ void DtlsMsgPoolReset(WOLFSSL* ssl)
if (ssl->dtls_tx_msg_list) { if (ssl->dtls_tx_msg_list) {
DtlsMsgListDelete(ssl->dtls_tx_msg_list, ssl->heap); DtlsMsgListDelete(ssl->dtls_tx_msg_list, ssl->heap);
ssl->dtls_tx_msg_list = NULL; ssl->dtls_tx_msg_list = NULL;
ssl->dtls_tx_msg = NULL;
ssl->dtls_tx_msg_list_sz = 0; ssl->dtls_tx_msg_list_sz = 0;
ssl->dtls_timeout = ssl->dtls_timeout_init; ssl->dtls_timeout = ssl->dtls_timeout_init;
} }
@@ -6085,10 +6086,12 @@ int VerifyForDtlsMsgPoolSend(WOLFSSL* ssl, byte type, word32 fragOffset)
int DtlsMsgPoolSend(WOLFSSL* ssl, int sendOnlyFirstPacket) int DtlsMsgPoolSend(WOLFSSL* ssl, int sendOnlyFirstPacket)
{ {
int ret = 0; int ret = 0;
DtlsMsg* pool = ssl->dtls_tx_msg_list; DtlsMsg* pool;
WOLFSSL_ENTER("DtlsMsgPoolSend()"); WOLFSSL_ENTER("DtlsMsgPoolSend()");
pool = ssl->dtls_tx_msg == NULL ? ssl->dtls_tx_msg_list : ssl->dtls_tx_msg;
if (pool != NULL) { if (pool != NULL) {
if ((ssl->options.side == WOLFSSL_SERVER_END && if ((ssl->options.side == WOLFSSL_SERVER_END &&
!(ssl->options.acceptState == SERVER_HELLO_DONE || !(ssl->options.acceptState == SERVER_HELLO_DONE ||
@@ -6176,6 +6179,7 @@ int DtlsMsgPoolSend(WOLFSSL* ssl, int sendOnlyFirstPacket)
} }
else else
pool = pool->next; pool = pool->next;
ssl->dtls_tx_msg = pool;
} }
} }

1
wolfssl/internal.h
View File

@@ -3741,6 +3741,7 @@ struct WOLFSSL {
word32 dtls_tx_msg_list_sz; word32 dtls_tx_msg_list_sz;
word32 dtls_rx_msg_list_sz; word32 dtls_rx_msg_list_sz;
DtlsMsg* dtls_tx_msg_list; DtlsMsg* dtls_tx_msg_list;
DtlsMsg* dtls_tx_msg;
DtlsMsg* dtls_rx_msg_list; DtlsMsg* dtls_rx_msg_list;
void* IOCB_CookieCtx; /* gen cookie ctx */ void* IOCB_CookieCtx; /* gen cookie ctx */
word32 dtls_expected_rx; word32 dtls_expected_rx;