1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 // Some socket related helper methods for quic.
7 #ifndef NET_TOOLS_QUIC_QUIC_SOCKET_UTILS_H_
8 #define NET_TOOLS_QUIC_QUIC_SOCKET_UTILS_H_
11 #include <sys/socket.h>
14 #include "net/base/ip_endpoint.h"
15 #include "net/quic/quic_protocol.h"
20 class QuicSocketUtils {
22 // If the msghdr contains IP_PKTINFO or IPV6_PKTINFO, this will return the
23 // IPAddressNumber in that header. Returns an uninitialized IPAddress on
25 static IPAddressNumber GetAddressFromMsghdr(struct msghdr *hdr);
27 // If the msghdr contains an SO_RXQ_OVFL entry, this will set dropped_packets
28 // to the correct value and return true. Otherwise it will return false.
29 static bool GetOverflowFromMsghdr(struct msghdr *hdr, int *dropped_packets);
31 // Sets either IP_PKTINFO or IPV6_PKTINFO on the socket, based on
32 // address_family. Returns the return code from setsockopt.
33 static int SetGetAddressInfo(int fd, int address_family);
35 // Reads buf_len from the socket. If reading is successful, returns bytes
36 // read and sets peer_address to the peer address. Otherwise returns -1.
38 // If dropped_packets is non-null, it will be set to the number of packets
39 // dropped on the socket since the socket was created, assuming the kernel
40 // supports this feature.
42 // If self_address is non-null, it will be set to the address the peer sent
43 // packets to, assuming a packet was read.
44 static int ReadPacket(int fd, char* buffer, size_t buf_len,
46 IPAddressNumber* self_address,
47 IPEndPoint* peer_address);
49 // Writes buf_len to the socket. If writing is successful, sets the result's
50 // status to WRITE_STATUS_OK and sets bytes_written. Otherwise sets the
51 // result's status to WRITE_STATUS_BLOCKED or WRITE_STATUS_ERROR and sets
52 // error_code to errno.
53 static WriteResult WritePacket(int fd, const char* buffer, size_t buf_len,
54 const IPAddressNumber& self_address,
55 const IPEndPoint& peer_address);
61 #endif // NET_TOOLS_QUIC_QUIC_SOCKET_UTILS_H_