1#!/bin/sh 2 3# Based on https://gist.github.com/zonque/7d03568eab14a2bb57cb by 4# Daniel Mack github@zonque.org 5 6# Modified version of sctp.sh by Michael Tuexen <tuexen@freebsd.org>: 7# Basically it is the first test without calling sctp_recvmsg() on 8# the server side and the required cleanups to avoid unused variables. 9# This program triggers pretty quickly the "Queues are not empty when 10# handling SHUTDOWN-COMPLETE" panic. This happened "by accident" with 11# the original sctp.sh, if the flags argument contained the value 12# MSG_DONTWAIT and sctp_recvmsg() returned -1 indicating EAGAIN. This 13# way no successful sctp_recvmsg() call happened. 14 15# "panic: Queues are not empty when handling SHUTDOWN-COMPLETE" seen. 16 17kldstat -v | grep -q sctp || kldload sctp.ko 18cat > /tmp/sctp3.c <<EOF 19#include <sys/types.h> 20#include <sys/socket.h> 21#include <unistd.h> 22#include <arpa/inet.h> 23#include <libgen.h> 24#include <netinet/in.h> 25#include <netinet/sctp.h> 26#include <stdio.h> 27#include <stdlib.h> 28#include <string.h> 29 30static int my_port_num; 31 32static void 33die(const char *s) 34{ 35 perror(s); 36 exit(1); 37} 38 39static void 40server(void) 41{ 42#if 0 43 struct sctp_sndrcvinfo sndrcvinfo; 44#endif 45 struct sockaddr_in servaddr = { 46 .sin_family = AF_INET, 47 .sin_addr.s_addr = htonl(INADDR_LOOPBACK), 48 .sin_port = htons(my_port_num), 49 }; 50 struct sctp_initmsg initmsg = { 51 .sinit_num_ostreams = 1, 52 .sinit_max_instreams = 1, 53 .sinit_max_attempts = 4, 54 }; 55 int listen_fd, conn_fd, ret; 56#if 0 57 int flags, in; 58#endif 59 60 listen_fd = socket(AF_INET, SOCK_STREAM, IPPROTO_SCTP); 61 if (listen_fd < 0) 62 die("socket"); 63 64 ret = bind(listen_fd, (struct sockaddr *) &servaddr, sizeof(servaddr)); 65 if (ret < 0) 66 die("bind"); 67 68 ret = setsockopt(listen_fd, IPPROTO_SCTP, SCTP_INITMSG, &initmsg, 69 sizeof(initmsg)); 70 if (ret < 0) 71 die("setsockopt"); 72 73 ret = listen(listen_fd, 5); 74 if (ret < 0) 75 die("listen"); 76 77 for (;;) { 78#if 0 79 char buffer[1024]; 80#endif 81 printf("Waiting for connection\n"); 82 fflush(stdout); 83 84 conn_fd = accept(listen_fd, (struct sockaddr *) NULL, NULL); 85 if(conn_fd < 0) 86 die("accept()"); 87 88 printf("New client connected\n"); 89 fflush(stdout); 90 91#if 0 92 flags = 0; 93 in = sctp_recvmsg(conn_fd, buffer, sizeof(buffer), NULL, 0, 94 &sndrcvinfo, &flags); 95 if (in > 0) { 96 printf("Received data: %s\n", buffer); 97 fflush(stdout); 98 } 99#endif 100 close(conn_fd); 101 } 102} 103 104static void 105client(void) 106{ 107 struct sockaddr_in servaddr = { 108 .sin_family = AF_INET, 109 .sin_port = htons(my_port_num), 110 .sin_addr.s_addr = htonl(INADDR_LOOPBACK), 111 }; 112 int conn_fd, ret; 113 const char *msg = "Hello, Server!"; 114 115 conn_fd = socket(AF_INET, SOCK_STREAM, IPPROTO_SCTP); 116 if (conn_fd < 0) 117 die("socket()"); 118 119 ret = connect(conn_fd, (struct sockaddr *) &servaddr, sizeof(servaddr)); 120 if (ret < 0) 121 die("connect()"); 122 123 ret = sctp_sendmsg(conn_fd, (void *) msg, strlen(msg) + 1, NULL, 0, 0, 0, 0, 0, 0 ); 124 if (ret < 0) 125 die("sctp_sendmsg"); 126 127 close(conn_fd); 128} 129 130int 131main(int argc __unused, char *argv[]) 132{ 133 134 my_port_num = atoi(argv[1]); 135 if (strstr(basename(argv[0]), "server")) 136 server(); 137 else 138 client(); 139 140 return (0); 141} 142EOF 143 144cc -o /tmp/server -Wall -Wextra -O2 /tmp/sctp3.c || exit 145ln -sf /tmp/server /tmp/client 146 147parallel=100 148for i in `jot $parallel 62324`; do 149 /tmp/server $i > /dev/null & 150done 151(cd ../testcases/swap; ./swap -t 1m -i 20 -l 100) & 152sleep 2 153 154start=`date +%s` 155while [ $((`date +%s` - start)) -lt 60 ]; do 156 pids= 157 for i in `jot 50`; do 158 for j in `jot $parallel 62324`; do 159 /tmp/client $j & 160 pids="$pids $!" 161 done 162 done 163 for i in $pids; do 164 wait $i 165 done 166done 167pkill server 168wait 169while pkill swap; do :; done 170wait 171rm -f /tmp/sctp3.c /tmp/server /tmp/client 172exit 0 173