X-Git-Url: http://git.grml.org/?p=grml-scripts.git;a=blobdiff_plain;f=compile%2Fpong.c;fp=compile%2Fpong.c;h=0000000000000000000000000000000000000000;hp=0ca49e27af2a86aa2e8ea356931e933b09f5bb47;hb=c08b156abb0b2b1b1335cb1ada0c08758553238b;hpb=b0c3e5ff760f99d6ff7721852bc1a0d73c5ea201

diff --git a/compile/pong.c b/compile/pong.c
deleted file mode 100644
index 0ca49e2..0000000
--- a/compile/pong.c
+++ /dev/null
@@ -1,160 +0,0 @@
-/*
- * By Patrick Reynolds <reynolds@cs.duke.edu>
- * Distributed under GPL.
- *
- * Build instructions
- *   gcc pong.c -o pong
- *
- * Usage:
- *   pong 1.2.3.0     # as root!
- */
-
-#include <errno.h>
-#include <signal.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include <arpa/inet.h>
-#include <netinet/in.h>
-#include <netinet/ip_icmp.h>
-#include <sys/socket.h>
-
-#define PONG_DEAD 0
-#define PONG_BROKEN 1
-#define PONG_OKAY 2
-
-#undef I_CARE_ABOUT_BAD_RETURN_PACKETS
-
-int id, sock;
-int datalen = 0;
-int nhosts = 256;
-int vec[256];
-int foo_set = 0;
-struct sockaddr_in dest;
-
-void pong();
-void catch();
-int in_cksum(u_short *addr, int len);
-void print();
-void foo(int i) { foo_set = 1; }
-
-int main(int argc, char **argv) {
-  id = getpid();
-  if ((sock = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) {
-    perror("pong: socket");
-    return -1;
-  }
-  if (argc != 2) {
-    fprintf(stderr, "Usage:\n  %s aaa.bbb.ccc.0\n\n", argv[0]);
-    return -1;
-  }
-  bzero(&dest, sizeof(dest));
-  dest.sin_family = AF_INET;
-  inet_aton(argv[1], &dest.sin_addr);
-  pong();
-  catch();
-  print();
-  return 0;
-}
-
-void pong() {
-  unsigned char buf[sizeof(struct icmphdr)];
-  struct icmphdr *p = (struct icmphdr *)buf;
-  int ret, i;
-
-	fprintf(stderr, "Sending packets");
-
-  p->type = ICMP_ECHO;
-  p->code = 0;
-  p->checksum = 0;
-  p->un.echo.sequence = 0;
-  p->un.echo.id = id;
-
-  p->checksum = in_cksum((u_short *)p, datalen + 8);
-
-  dest.sin_addr.s_addr &= 0xffffff;
-  for (i=1; i<=254; i++) {
-		fputc('.', stderr);
-		fflush(stderr);
-    dest.sin_addr.s_addr &= 0xffffff;
-    dest.sin_addr.s_addr |= (i<<24);
-    ret = sendto(sock, (char *)buf, 8 + datalen, 0,
-      (struct sockaddr *)&dest, sizeof(struct sockaddr_in));
-    if (ret != 8 + datalen) {
-      if (ret < 0)
-        perror("pong: sendto");
-      printf("pong: wrote %d chars, ret=%d\n", 8+datalen, ret);
-    }
-  }
-	fputc('\n', stderr);
-}
-
-void catch() {
-  int ret;
-  char incoming[128];
-	fprintf(stderr, "Gathering responses");
-  bzero(vec, nhosts*sizeof(int));
-  alarm(5);
-  signal(SIGALRM, foo);
-  signal(SIGINT, foo);
-  while (!foo_set) {
-    struct sockaddr_in from;
-		fd_set rfds;
-		struct timeval tv = { 1, 0 };
-    socklen_t fromlen = sizeof(from);
-		FD_ZERO(&rfds);
-		FD_SET(sock, &rfds);
-		if (select(sock+1, &rfds, NULL, NULL, &tv) <= 0) continue;
-    ret = recvfrom(sock, (char *)incoming, 128, 0, (struct sockaddr *)&from,
-      &fromlen);
-#ifdef I_CARE_ABOUT_BAD_RETURN_PACKETS
-    if (ret != datalen + 16 && (ret >= 0 || errno != EINTR)) {
-      if (ret < 0)
-        perror("pong: recvfrom");
-      else
-        vec[from.sin_addr.s_addr >> 24] = PONG_BROKEN;
-      printf("pong: read %d chars, ret=%d, host=%d\n", 16+datalen, ret,
-        from.sin_addr.s_addr>>24);
-    }
-    else
-#endif
-		{
-			fputc('.', stderr);
-			fflush(stderr);
-      vec[from.sin_addr.s_addr >> 24] = PONG_OKAY;
-		}
-  }
-	fputc('\n', stderr);
-}
-
-int in_cksum(u_short *addr, int len) {
-  register int nleft = len;
-  register u_short *w = addr;
-  register int sum = 0;
-  u_short answer = 0;
-        
-  while (nleft > 1)  {
-    sum += *w++;
-    nleft -= 2;
-  }
-  if (nleft == 1) {
-    *(u_char *)(&answer) = *(u_char *)w ;
-    sum += answer;
-  }
-  sum = (sum >> 16) + (sum & 0xffff);
-  sum += (sum >> 16);
-  answer = ~sum;
-  return(answer);
-}
-
-void print() {
-  int i, count = 0;
-  for (i=0; i<=255; i++)
-    if (vec[i]) {
-      unsigned int ip = ntohl(dest.sin_addr.s_addr);
-      count++;
-      printf("%d.%d.%d.%d: %s\n", ip>>24, (ip>>16)&0xff, (ip>>8)&0xff, i,
-        vec[i]==PONG_OKAY ? "found" : "broken");
-    }
-  printf("\nTotal hosts: %d\n", count);
-}