setsockopt

# Include # Include # Include // # Include # Include # Define ICMP_Echo 8 // The type of ICMP echo request message is 8# Define ICMP_ECHOREPLY 0 // The type value of the ICMP echo response packet is 0# Define sniffer_icmp_size 101 // large for

Statement: the original content of this article is from Http://hi.baidu.com/roxws/blog/item/1f57e52eea0ddc5c4fc226ac.html 1. UDP sending buffer and receiving buffer, which mainly prevents network jitter. 1.The buffer of the default UDP socket is

Vulnerability description: Because SQL Server has no limits on UDP of port 1434 and constructs a special UDP packet, SQL Server will certainly respond. If you receive a large number of these UDP packets, SQL Server will consume the CPU to handle

Extremely concealed Ping BackdoorSource code # Include # Include # Include # Include # Include # Define ICMP_Echo 8 // The type of ICMP echo request message is 8# Define ICMP_ECHOREPLY 0 // The type value of the ICMP echo response packet is 0#

The select function can communicate with multiple sockets in a non-blocking manner.ProgramIt only demonstrates the use of the select function. The function is very simple. Even if a connection is closed, the current number of connections is not

When connected to the server, you can perform other operations to prevent frequent access to the client or frequent access to the client, but the server does not know, get a half answer to this situation. Of course, you can add a heartbeat packet in

Note that not sending transmits the data in the sending buffer of S to the other end of the connection, but the Protocol. Sending only copies the data in the Buf to the remaining space of the sending buffer of S.   The data sent by TCP to the other

1. What is a keepalive timer? [1] There is no data stream on an idle (idle) TCP connection. Many beginners of TCP/IP are surprised at this. That is to say, if no process at both ends of the TCP connection sends data to the other end, there is no

  Record:Due to the project demonstration needs in the past few days, we have to extend the original PC & settopbox-based solution to the handheld terminal, so we have received a task, the original version was transplanted to the handheld terminal

In developmentIn socket applications, the first task is to ensure reliability and meet specific requirements. Use the 4TIPS: you can design and develop the socket program to achieve the best performance from the beginning. This article includes the

Broadcast data cannot be received after UDP socket is bound to an IP address. Fannyth05-11-10, because my program is running on a machine with multiple NICs, So I bound the IP address of the NIC to the socket Server_addr.sin_addr.s_addr = inet_addr (

Apache suspended animation, Apache maintenance, Master Please come in, thank you A few days ago, Apache still died every 1 days, I have been trying to solve, but these two days, every one hours to die once, if after his death, I do not manually end

Title: Winsock API function Daquan 1 Author: Alias Name Key words: socket, API, Winsock In this paper, the conversion from C ++ builder research-http://www.ccrun.com/article/go.asp? I = 186 & D = 353200The Windows Sockets API interface provided

Download the VLC-android source code and compile it successfully. For more information, see VLC-android compilation process. 1. Compile live555 in the contrib directory Modify ~ /Code/VLC-android/extras/contrib distro. Mak added. Live   ALL:.

Yu,Hua Qing vision embedded college lecturer. In network communication, many operations will cause process blocking. In this case, we need to set the time and forcibly return the result after the time to avoid infinite blocking of the process

First, let's mention the encapsulation of the socket (not complicated, so simply say).Endian.h: Encapsulates a byte-order conversion function (global function, in the Muduo::net::sockets namespace).socketsops.h/socketsops.cc: Encapsulates a

UDP and TCPUDP (User Datagram Protocol, Subscriber Datagram Protocol) is a no-connection protocol that does not guarantee that the UDP datagram will reach its final destination, does not guarantee that the order of the datagrams remains unchanged

UDP: User Datagram UDP is a simple datagram-oriented transport layer protocol. Each output operation of a process usually generates a UDP datagram and assembles it into an IP datagram to be sent. This is different from the stream-oriented protocol,

The tcp_keepalive option is just a switch, and the default keepalive option in Linux is as follows:$sudo Sysctl-a | grep keepalivenet.ipv4.tcp_keepalive_time = 7200net.ipv4.tcp_keepalive_probes = 9NET.IPV4.TCP_KEEPALIVE_INTVL = 75The KeepAlive

1.TCP transmit and receive buffers default values[Email protected]/]# Cat/proc/sys/net/ipv4/tcp_rmem4096 87380 419430487380:tcp the default value of the receive buffer[Email protected]/]# Cat/proc/sys/net/ipv4/tcp_wmem4096 16384 419430416384:tcp