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MINOR: quic: Handle the cases of overlapping STREAM frames

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This is the same treatment for bidi and uni STREAM frames. This is a duplication
code which should me remove building a function for both these types of streams.
This commit is contained in:
Frédéric Lécaille 2021-12-22 16:13:43 +01:00
parent 01cfec74f5
commit 10250b2e93
1 changed files with 30 additions and 14 deletions
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44
src/xprt_quic.c
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@ -2046,7 +2046,7 @@ static int qc_handle_bidi_strm_frm(struct quic_rx_packet *pkt,
{
int total;
struct qcs *strm;
struct eb64_node *strm_node, *frm_node;
struct eb64_node *strm_node;
struct quic_rx_strm_frm *frm;
strm_node = qcc_get_qcs(qc->qcc, strm_frm->id);
@ -2056,12 +2056,20 @@ static int qc_handle_bidi_strm_frm(struct quic_rx_packet *pkt,
}
strm = eb64_entry(&strm_node->node, struct qcs, by_id);
frm_node = eb64_lookup(&strm->rx.frms, strm_frm->offset.key);
/* FIXME: handle the case where this frame overlap others */
if (frm_node) {
TRACE_PROTO("Already existing stream data",
QUIC_EV_CONN_PSTRM, qc);
goto out;
if (strm_frm->offset.key < strm->rx.offset) {
size_t diff;
if (strm_frm->offset.key + strm_frm->len <= strm->rx.offset) {
TRACE_PROTO("Already received STREAM data",
QUIC_EV_CONN_PSTRM, qc);
goto out;
}
TRACE_PROTO("Partially already received STREAM data", QUIC_EV_CONN_PSTRM, qc);
diff = strm->rx.offset - strm_frm->offset.key;
strm_frm->offset.key = strm->rx.offset;
strm_frm->len -= diff;
strm_frm->data += diff;
}
total = 0;
@ -2112,7 +2120,7 @@ static int qc_handle_uni_strm_frm(struct quic_rx_packet *pkt,
struct quic_conn *qc)
{
struct qcs *strm;
struct eb64_node *strm_node, *frm_node;
struct eb64_node *strm_node;
struct quic_rx_strm_frm *frm;
size_t strm_frm_len;
@ -2123,12 +2131,20 @@ static int qc_handle_uni_strm_frm(struct quic_rx_packet *pkt,
}
strm = eb64_entry(&strm_node->node, struct qcs, by_id);
frm_node = eb64_lookup(&strm->rx.frms, strm_frm->offset.key);
/* FIXME: handle the case where this frame overlap others */
if (frm_node) {
TRACE_PROTO("Already existing stream data",
QUIC_EV_CONN_PSTRM, qc);
goto out;
if (strm_frm->offset.key < strm->rx.offset) {
size_t diff;
if (strm_frm->offset.key + strm_frm->len <= strm->rx.offset) {
TRACE_PROTO("Already received STREAM data",
QUIC_EV_CONN_PSTRM, qc);
goto out;
}
TRACE_PROTO("Partially already received STREAM data", QUIC_EV_CONN_PSTRM, qc);
diff = strm->rx.offset - strm_frm->offset.key;
strm_frm->offset.key = strm->rx.offset;
strm_frm->len -= diff;
strm_frm->data += diff;
}
strm_frm_len = strm_frm->len;