The strange problem of Linux socket-general Linux technology-Linux programming and kernel information. The following is a detailed description. When using a TCP Socket for Listen in Linux, a strange problem was found recently.
Accept (2) can accept a sockaddr pointer to return the address of a remote host. However, if this connection is the first time this program occurs, no data is obtained. This problem is not solved from the second time, that is, the access function follows the accept function and uses a getpeername (2) to obtain the IP address of the connected host, the connection since then does not have this problem. However, if accept (sock_fd, NULL, NULL) is used in accept to prevent accept (2) from returning the remote host address, the first getperrname function is useless.
This problem on the platform I can now test has Linux 2.4.20, glibc-2.3, Linux 2.6.18 glibc-2.3, Linux 2.6.20-21, glibc 2.7 all have this problem, I don't know if it is a socket implementation bug.
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