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setsockopt (sys/socket.h)


setsockopt (sys/socket.h)

By : user3861480
Date : November 20 2020, 07:00 PM
around this issue The SO_RCVBUF option is defined as having a parameter type of int, so (c) and (d) are not correct.
code :


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How to set a socket option in C++ using setsockopt

How to set a socket option in C++ using setsockopt


By : user3738482
Date : March 29 2020, 07:55 AM
Hope that helps Microsoft's implementation of setsockopt() has a const char* for the fourth option. POSIX usually has a const void*. It has to be pointing to a buffer that contains values. The last argument is the size in bytes of the buffer.
So something like this:
code :
setsockopt(
    _socket.native_handle(), IPPROTO_IP, IP_OPTIONS,
    reinterpret_cast<char*>(&route), sizeof(int));
setsockopt SO_BROADCAST on TCP socket

setsockopt SO_BROADCAST on TCP socket


By : Tina Stevens
Date : March 29 2020, 07:55 AM
I hope this helps . I think your setsockopt decoder is wrong. Are you sure it isn't one of these?
code :
#define TCP_NODELAY              1  /* Don't delay send to coalesce packets  */
#define TCP_MAXSEG               2  /* Set maximum segment size  */
#define TCP_CORK                 3  /* Control sending of partial frames  */
#define TCP_KEEPIDLE             4  /* Start keeplives after this period */
#define TCP_KEEPINTVL            5  /* Interval between keepalives */
#define TCP_KEEPCNT              6  /* Number of keepalives before death */
setsockopt() for a raw socket fd failed

setsockopt() for a raw socket fd failed


By : AbiLead
Date : March 29 2020, 07:55 AM
this one helps. Description:
code :
int syn_socket = (AF_INET, SOCK_RAW, IPPROTO_RAW);
int a = (1, 2, 3);
int syn_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
Which socket, the clientSocket = accept() or the listen(socket), do you setsockopt SO_KEEPALIVE on?

Which socket, the clientSocket = accept() or the listen(socket), do you setsockopt SO_KEEPALIVE on?


By : Erik
Date : March 29 2020, 07:55 AM
help you fix your problem Setting the option on each accepted socket would seem most reliable and portable. Inheritance of non-blocking mode across accept is inconsistent across implementations, and SO_KEEPALIVE has no meaning for the listening socket.
Socket Programming C++ setsockopt()

Socket Programming C++ setsockopt()


By : Al Mundi
Date : March 29 2020, 07:55 AM
Any of those help I am new to socket programming. I am trying to write a basic socket programming program. I looked up the usages of socket(), bind() , setsockopt() functions and the others along with working code samples. In the setsockopt() function , I had used the SO_REUSEPORT option, however first time when I run the program on a given port address it works fine, however for any subsequent runs binding fails unless I have changed to some other port address , I think this is what you want to do:
code :
  const int opt = 1;
  setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
  setsockopt(sock, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt));
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