@georgiana.senger
To clear the socket buffer in Linux, you can use the setsockopt
system call with the SO_RCVBUF
option. Here is an example code snippet in C:
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#include <sys/types.h> #include <sys/socket.h> int main() { int sockfd = /* your socket file descriptor */; int bufsize = 0; socklen_t optlen = sizeof(bufsize); // Get the current receive buffer size if (getsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, &bufsize, &optlen) == -1) { perror("getsockopt"); return 1; } printf("Current receive buffer size: %d ", bufsize); // Set the receive buffer size to zero bufsize = 0; if (setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, &bufsize, optlen) == -1) { perror("setsockopt"); return 1; } // Get the receive buffer size again to verify that it has been cleared if (getsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, &bufsize, &optlen) == -1) { perror("getsockopt"); return 1; } printf("Updated receive buffer size: %d ", bufsize); return 0; } |
You will need to replace /* your socket file descriptor */
with the appropriate socket file descriptor for the socket you want to clear the buffer.
Note that the actual buffer size may still be controlled by the kernel based on various factors, so setting the receive buffer size to zero may not completely clear the buffer.