Re: errors during bind

[Patrick Townsend <townsend@xxxxxxxxxxxxxx>]

Also, you might have better luck using SOCK_STREAM instead of
SOCK_DGRAM.

Patrick

PhaniHR wrote:
> 
>      Hi,
> 
>      We have this serious problem. Please help us to resolve this at this
>      earliest. We got the following errors during bind on AS/400
> 
>      - EINVAL (The value specified for the argument is not correct.) -
>      EUNKNOWN (Unknown system state.)
> 
>      These errors occured at different times and persisted for sometime.
>      EINVAL was solved by doing an IPL. But EUNKNOWN persisted even after
>      doing an IPL.
> 
> 
>      Doubts :
> 
>      1. What does EUNKNOWN mean ?
>      2. Under what conditions does EUNKNOWN occur during bind ? 3. What are
>      the corrective actions for EUNKNOWN ?
>      4. If EUNKNOWN error happens again, what are the steps we should take
>      in order to give more information to you ?
>      5. What do we have to do to prevent EUNKNOWN from happening again ? 6.
>      What do we have to do to prevent EINVAL from happening again ?
>      7. How can we find out whether a particular address (say, "RS2000" for
>      UDP socket) is already in use ? What we would like to know is how   we
>      can find from a program (say A) that a particular address is in  use
>      by a different program (say B).
> 
> 
> 
>      The code is as follows
> 
>      ....
>      ....
> 
>      int CreateUDPSock(char * UDPFile)
>      {
>      struct sockaddr_un servaddr;
>      int servlen, sockfd;
> 
>      memset(&servaddr,'\0', sizeof(servaddr)); servaddr.sun_family =
>      AF_UNIX; strcpy(servaddr.sun_path, UDPFile);
>      servlen = SUN_LEN(&servaddr);
> 
>      if((sockfd=socket(AF_UNIX,SOCK_DGRAM,0)) < 0) { printf("Error opening
>      UDP socket\n"); return -1; }
> 
>      unlink(UDPFile);
>      errno = 0;           /* Ignore the EBADF error */
> 
>      if(bind(sockfd,(struct sockaddr *)&servaddr,servlen) < 0) {
>      perror("error in bind");          /* ERROR noticed here */ return -1;
>      }
> 
>      return sockfd;
>      }
> 
>      void main()
>      {
>      int sockfd;
> 
>      sockfd = CreateUDPSock("RS2000");
>      ....
>      ....
>      }
> 
> 
> 
> 
>      Best regards,
> 
>      Phaniraj
> 
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-- 

Patrick Townsend                       mailto:townsend@patownsend.com
Patrick Townsend & Associates, Inc.    http://www.patownsend.com
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