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Solved:

I was not specifiying the sstat_assoc_id in addrinfo before calling
getsockopt.

Thanks all.

>-- Original Message --
>Date: Wed, 5 Dec 2007 12:29:15 +0000
>From:
>john.fitzpatrick4 AT mail.dcu.ie
>To:
>discussion AT sctp.de
>Subject: [SCTP-Discussion] getsockopt() returning invalid argument
>
>
>Hi all,
>
>I am writing an application using LK-SCTP and the one-to-many style
>sockets using SOCK_SEQPACKET. The problem I am having is when I am
>calling getsockopt() it returns with an error saying invalid argument. I
>have used the same call with the same parameters while using SOCK_STREAM
>with no problems. The function call is -
>getsockopt(sd, IPPROTO_SCTP, SCTP_STATUS, &addrinfo, &lenaddr)
>
>Specifically I am going to use the getsockopt function to obtain an srtt
>value, is this possible while using UPD style one-to-many sockets.
>
>I have included sample code for both a Client/Server so that you can
>recreate the problem to show the problem I am having, any help is
>greatly appreciated.
>
>Kind Regards,
>John Fitzpatrick
>
>//Client Start **************************************************
>#include <stdio.h>
>#include <sys/types.h>
>#include <sys/socket.h>
>#include <netinet/in.h>
>#include <arpa/inet.h>
>#include <stdlib.h>
>#include <unistd.h>
>#include <netinet/sctp.h>
>#include <sys/uio.h>
>
>int main(int argc, char **argv)
>{
> //Define Variables
> int sd, port;
> struct sockaddr_in sin;
> struct sctp_event_subscribe event;
>
> //Check Usage
> if(argc != 3){
> printf("\nUsage: <Server> <port>\n");
> return -1;
> }
>
> //Create Socket
> sd = socket(PF_INET, SOCK_SEQPACKET, IPPROTO_SCTP);
> if(sd < 0){
> perror("Socket");
> exit(1);
> }
>
> sin.sin_family = PF_INET;
> port = atoi(argv[2]);
> sin.sin_port = htons(port);
> sin.sin_addr.s_addr = inet_addr(argv[1]);
>
> //Set Socket Options
> /* Enable all events */
> event.sctp_data_io_event = 1;
> event.sctp_association_event = 1;
> event.sctp_address_event = 1;
> event.sctp_send_failure_event = 1;
> event.sctp_peer_error_event = 1;
> event.sctp_shutdown_event = 1;
> event.sctp_partial_delivery_event = 1;
> event.sctp_adaption_layer_event = 1;
>
> if (setsockopt(sd, IPPROTO_SCTP, SCTP_EVENTS, &event,
>sizeof(event)) !=
>0) {
> perror("setevent failed");
> exit(1);
> }
>
> //Connect
> if(connect(sd, (struct sockaddr *) &sin, sizeof(sin)) < 0){
> perror("Connect");
> exit(1);
> }
>
> struct sctp_status addrinfo;
> int lenaddr = sizeof(addrinfo);
> int send_packet = 1;
> int sz;
> while(1){
> sz = sctp_sendmsg(sd, (int *) &send_packet, sizeof(int),
>(struct
>sockaddr *) &sin, sizeof(struct sockaddr_in), 0, 0, 0, 100, 0);
> send_packet++;
>
> if(getsockopt(sd, IPPROTO_SCTP, SCTP_STATUS, &addrinfo,
>&lenaddr) < 0){
> perror("getsockopt");
> }
> }
>}
>//Client End **************************************************
>
>//Server Start ************************************************
>#include <stdio.h>
>#include <sys/types.h>
>#include <sys/socket.h>
>#include <netinet/in.h>
>#include <arpa/inet.h>
>#include <stdlib.h>
>#include <unistd.h>
>#include <netinet/sctp.h>
>#include <sys/uio.h>
>
>int main(int argc, char **argv)
>{
> //Define Variables
> int sd, bound, port;
> struct sockaddr_in cli_addr, sin;
> struct sctp_event_subscribe event;
>
> //Check Usage
> if(argc != 3){
> printf("\nUsage: <Server> <port>\n");
> return -1;
> }
>
> //Create Socket
> sd = socket(PF_INET, SOCK_SEQPACKET, IPPROTO_SCTP);
> if(sd < 0){
> perror("Socket");
> exit(1);
> }
>
> sin.sin_family = PF_INET;
> port = atoi(argv[2]);
> sin.sin_port = htons(port);
> sin.sin_addr.s_addr = inet_addr(argv[1]);
>
> //Bind
> bound = bind(sd, (struct sockaddr *) &sin, sizeof(sin));
> printf("Bound = %d\n", bound);
> if(bound < 0){
> perror("Bind");
> exit(1);
> }
>
> //Set Socket Options
> /* Enable all events */
> event.sctp_data_io_event = 1;
> event.sctp_association_event = 1;
> event.sctp_address_event = 1;
> event.sctp_send_failure_event = 1;
> event.sctp_peer_error_event = 1;
> event.sctp_shutdown_event = 1;
> event.sctp_partial_delivery_event = 1;
> event.sctp_adaption_layer_event = 1;
>
> if (setsockopt(sd, IPPROTO_SCTP, SCTP_EVENTS, &event,
>sizeof(event)) !=
>0) {
> perror("setevent failed");
> exit(1);
> }
>
> /* Listen to socket */
> if(listen(sd, 4) < 0){
> perror("Listen");
> }
>
> //Receive Message
> int recv;
> int recv_packet;
> int lenaddress = sizeof(struct sockaddr_in);
> while(1){
> if(sctp_recvmsg(sd, (int*)&recv_packet,
>sizeof(recv_packet),
>&cli_addr, &lenaddress, NULL, 0) < 0)
> perror("sctp_recvmsg");
> printf("Recv: %d\n", recv_packet);
> }
>}
>//Server End ************************************************
>
>
>_______________________________________________
>sctp-discussion mailing list
>sctp-discussion AT sctp.de
>http://www.sctp.de/mailman/listinfo/sctp-discussion

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• [SCTP-Discussion] getsockopt() returning invalid argument, john . fitzpatrick4, 12/05/2007
  • RE: [SCTP-Discussion] getsockopt() returning invalid argument, john . fitzpatrick4, 12/05/2007

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