diff options
Diffstat (limited to 'link/link-protocol.h')
| -rw-r--r-- | link/link-protocol.h | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/link/link-protocol.h b/link/link-protocol.h index e82e599..f51260b 100644 --- a/link/link-protocol.h +++ b/link/link-protocol.h @@ -51,10 +51,12 @@ * Losses are detected as RFC 9002 says; congestion control is its NewReno * (RFC 9002 ยง7). */ -/* A packet is at most PURE_LINK_DATAGRAM bytes; a source's or an input's - * name is 1 to PURE_LINK_NAME bytes; a receiver keeps where a packet came - * from (the socket's address) in PURE_LINK_ADDRESS bytes. */ -enum { PURE_LINK_DATAGRAM = 1200, PURE_LINK_NAME = 64, PURE_LINK_ADDRESS = 28 }; +/* A packet is PURE_LINK_DATAGRAM bytes at most at first, and up to + * PURE_LINK_DATAGRAM_MOST once the path is found to carry that many (a + * probe of that size acknowledged: DPLPMTUD, RFC 8899); a source's or an + * input's name is 1 to PURE_LINK_NAME bytes; a receiver keeps where a + * packet came from (the socket's address) in PURE_LINK_ADDRESS bytes. */ +enum { PURE_LINK_DATAGRAM = 1200, PURE_LINK_DATAGRAM_MOST = 1452, PURE_LINK_NAME = 64, PURE_LINK_ADDRESS = 28 }; /* Counts for a host's report: packets and records sent, records sent again, * packets lost and acknowledged, packets received, deliveries handed over, @@ -91,10 +93,13 @@ void pure_link_sender_take(PureLinkSender *, const unsigned char *packet, size_t void pure_link_sender_tick(PureLinkSender *, uint64_t now); /* The next packet to send into out, and its number: its size, or 0 when * there is none (nothing to send, or the window is full). whole: a full - * packet is padded to PURE_LINK_DATAGRAM (so packets may go in a burst of - * whole datagrams, as UDP GSO sends them). */ -size_t pure_link_sender_packet(PureLinkSender *, unsigned char out[PURE_LINK_DATAGRAM], bool whole, uint64_t now, + * packet is padded to the sender's datagram (so packets may go in a burst + * of whole datagrams, as UDP GSO sends them). A probe of a larger size is + * larger than the datagram: it goes alone. */ +size_t pure_link_sender_packet(PureLinkSender *, unsigned char out[PURE_LINK_DATAGRAM_MOST], bool whole, uint64_t now, uint64_t *number); +/* The size of a full packet now. */ +size_t pure_link_sender_datagram(const PureLinkSender *); /* A packet made but not sent (the socket refused it): what it carried is * sent again, and it counts as never sent. */ void pure_link_sender_refused(PureLinkSender *, uint64_t number); |