BSD 4_3_Tahoe development

Work on file usr/guest/karels/tests/udpsrcrt.c

Synthesized-from: CSRG/cd2/4.3tahoe

diff --git a/usr/guest/karels/tests/udpsrcrt.c b/usr/guest/karels/tests/udpsrcrt.c
new file mode 100644 (file)
index 0000000..3a1a529
--- /dev/null
+++ b/usr/guest/karels/tests/udpsrcrt.c
@@ -0,0 +1,186 @@
+#include <stdio.h>
+#include <netdb.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/signal.h>
+#include <sys/time.h>
+#include <sys/errno.h>
+
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+
+#define MAXHOPS        10
+char srcrt[4 + MAXHOPS * sizeof(struct in_addr)];
+struct sockaddr_in dst = { AF_INET };
+
+int    nhops;
+int    sock;
+int    send();
+int    sent, recvd;
+extern int errno;
+char   *service = "echo";
+
+struct {
+       struct timeval t;
+       int n;
+       char sbuf[100];
+} rbuf, sbuf = { {0}, "Hi there"};
+
+main(argc, argv)
+       char *argv[];
+{
+       int n, i;
+       struct hostent *hp;
+       struct servent *sp;
+       struct protoent *pp;
+       char buf[4096];
+       char *cp = srcrt;
+       struct sockaddr_in from;
+       struct in_addr in;
+       struct timeval now;
+       int noopt = 0, loose = 0;
+       
+       argc--, argv++;
+       while (argc && argv[0][0] == '-') {
+               switch (argv[0][1]) {
+
+               case 'l':
+                       loose++;
+                       break;
+               case 'n':
+                       noopt++;
+                       break;
+               default:
+                       goto usage;
+               }
+               argc--, argv++;
+       }
+       if (argc == 0) {
+usage:
+               fprintf(stderr, "usage: ipsrcrt [ -n ] [ gateway ... ] dest\n");
+               exit(1);
+       }
+       *cp++ = IPOPT_NOP;
+       if (loose)
+               *cp++ = IPOPT_LSRR;
+       else
+               *cp++ = IPOPT_SSRR;
+       *cp++ = 3;
+       *cp++ = IPOPT_MINOFF;
+       while (argc) {
+               if (nhops == MAXHOPS) {
+                       fprintf(stderr, "too many hops, limit %d\n", MAXHOPS);
+                       exit(1);
+               }
+               if ((in.s_addr = inet_addr(*argv)) != -1)
+                       bcopy((char *)&in, cp, sizeof(struct in_addr));
+               else {
+                       hp = gethostbyname(*argv);
+                       if (hp == 0) {
+                               fprintf(stderr, "%s: unknown host\n", *argv);
+                               exit(1);
+                       }
+                       bcopy(hp->h_addr, cp, sizeof(struct in_addr));
+               }
+               cp += sizeof(struct in_addr);
+               nhops++;
+               argc--; argv++;
+       }
+       if ((sp = getservbyname(service, "udp")) == 0) {
+               fprintf(stderr, "%s: unknown service\n", service);
+               exit(10);
+       }
+       dst.sin_port = sp->s_port;
+       sock = socket(AF_INET, SOCK_DGRAM, 0);
+       if (sock < 0) {
+               perror("socket");
+               exit(10);
+       }
+       if ((pp = getprotobyname("ip")) == 0) {
+               fprintf(stderr, "ip: unknown protocol\n");
+               exit(10);
+       }
+       srcrt[IPOPT_OLEN + 1] = cp - srcrt - 1;         /* -1 is NOP */
+/*     *cp++ = IPOPT_EOL; */
+       if (!noopt) {
+               n = 4 + nhops * sizeof(struct in_addr);
+               printf("options %d long\n", n);
+               for (i = 0; i < (n+3)/4; i++)
+                       printf("%x ", ((int *)srcrt)[i]);
+               printf("\n");
+               if (setsockopt(sock, pp->p_proto, IP_OPTIONS, srcrt,
+                   4 + nhops * sizeof(struct in_addr)) < 0) {
+                       perror("setsockopt");
+                       exit(10);
+               }
+               n = sizeof(buf);
+               if (getsockopt(sock, pp->p_proto, IP_OPTIONS, buf, &n) < 0)
+                       perror("getsockopt");
+               else {
+                       printf("options now %d long\n", n);
+                       for (i = 0; i < (n+3)/4; i++)
+                               printf("%x ", ((int *)buf)[i]);
+                       printf("\n");
+               }
+       }
+               
+       bcopy(cp - sizeof(struct in_addr), &dst.sin_addr,
+           sizeof(struct in_addr));
+       signal(SIGALRM, send);
+       send();
+
+       for (;;) {
+               if ((n = recvfrom(sock, &rbuf, sizeof(rbuf), 0, &from,
+                   sizeof(from))) < 0) {
+                       if (errno != EINTR)
+                               perror("recvfrom");
+               } else {
+                       gettimeofday(&now);
+                       recvd++;
+                       printf("%d bytes from %s: seq=%d. time=", n,
+                               inet_ntoa(from.sin_addr), rbuf.n);
+                       timevalsub(&now, &rbuf.t);
+                       if (now.tv_sec)
+                               printf("%d.%03d sec.\n", now.tv_sec,
+                                       now.tv_usec/1000);
+                       else
+                               printf("%d.%d ms\n", now.tv_usec/1000,
+                                       now.tv_usec/10000);
+               }
+       }
+}
+
+send()
+{
+
+       alarm(1);
+       sbuf.n = sent++;
+       gettimeofday(&sbuf.t);
+       if (sendto(sock, &sbuf, sizeof(sbuf), 0, &dst, sizeof(dst)) < 0)
+               perror("sendto");
+}
+
+timevalsub(t1, t2)
+       struct timeval *t1, *t2;
+{
+
+       t1->tv_sec -= t2->tv_sec;
+       t1->tv_usec -= t2->tv_usec;
+       timevalfix(t1);
+}
+
+timevalfix(t1)
+       struct timeval *t1;
+{
+
+       if (t1->tv_usec < 0) {
+               t1->tv_sec--;
+               t1->tv_usec += 1000000;
+       }
+       while (t1->tv_usec >= 1000000) {
+               t1->tv_sec++;
+               t1->tv_usec -= 1000000;
+       }
+}