// Store data into the buffer
static ssize_t buffer_put_at(struct buffer *buf, size_t offset, const void *data, size_t len) {
- if(buf->maxsize <= buf->used)
- return 0;
-
debug("buffer_put_at %lu %lu %lu\n", (unsigned long)buf->used, (unsigned long)offset, (unsigned long)len);
size_t required = offset + len;
// cut already accepted front overlapping
if(rcv_offset < 0) {
- acceptable = rcv_offset + len >= 0;
+ acceptable = len > -rcv_offset;
if(acceptable) {
data -= rcv_offset;
len += rcv_offset;
+ hdr.seq -= rcv_offset;
}
+ } else {
+ acceptable = seqdiff(hdr.seq, c->rcv.nxt) >= 0 && seqdiff(hdr.seq, c->rcv.nxt) + len <= c->rcvbuf.maxsize;
}
-
- acceptable = seqdiff(hdr.seq, c->rcv.nxt) >= 0 && seqdiff(hdr.seq, c->rcv.nxt) + len <= c->rcvbuf.maxsize;
}
if(!acceptable) {
// Ignore unacceptable RST packets.
if(hdr.ctl & RST)
return 0;
- // Otherwise, send an ACK back in the hope things improve.
- ack(c, true);
- return 0;
+ // Otherwise, continue processing.
+ len = 0;
}
c->snd.wnd = hdr.wnd; // TODO: move below