2372 PDFs parsed:
segfault = 12
parse failed = 16
other fault = 0
ok = 2344

./side "/home/mikal/opensource-stable/mi/i - < %s" 
   ../shdns/sample-response ../shdns/shdns-response  | less

/home/mikal/opensource-stable/mi/i - < ../shdns/sample-response        | /home/mikal/opensource-stable/mi/i - < ../shdns/shdns-response
                                                                       |
0                 135       0x87       0207                            | 0                 135       0x87       0207  
1                 210       0xD2       0322                            | 1                 210       0xD2       0322  
2                 133       0x85       0205                            | 2                  10        0xA        012  
3                 128       0x80       0200                            | 3                  56       0x38        070       '8'  
4                   0        0x0         00                            | 4                   0        0x0         00  
5                   1        0x1         01                            | 5                   0        0x0         00  
6                   0        0x0         00                            | 6                   1        0x1         01  
7                   1        0x1         01                            | 7                   0        0x0         00  
8                   0        0x0         00                            | 8                   1        0x1         01  
9                   1        0x1         01                            | 9                   0        0x0         00  
10                  0        0x0         00                            | 10                  0        0x0         00  
11                  0        0x0         00                            | 11                  0        0x0         00  
12                  3        0x3         03                            | 12                  0        0x0         00  
13                119       0x77       0167       'w'                  | 13                  3        0x3         03  
14                119       0x77       0167       'w'                  | 14                119       0x77       0167       'w'  
15                119       0x77       0167       'w'                  | 15                119       0x77       0167       'w'  
16                  7        0x7         07                            | 16                119       0x77       0167       'w'  
17                115       0x73       0163       's'                  | 17                  7        0x7         07  
18                116       0x74       0164       't'                  | 18                115       0x73       0163       's'  
19                105       0x69       0151       'i'                  | 19                116       0x74       0164       't'  
20                108       0x6C       0154       'l'                  | 20                105       0x69       0151       'i'  
21                108       0x6C       0154       'l'                  | 21                108       0x6C       0154       'l'  
22                104       0x68       0150       'h'                  | 22                108       0x6C       0154       'l'  
23                113       0x71       0161       'q'                  | 23                104       0x68       0150       'h'  
24                  3        0x3         03                            | 24                113       0x71       0161       'q'  
25                 99       0x63       0143       'c'                  | 25                  3        0x3         03  
26                111       0x6F       0157       'o'                  | 26                 99       0x63       0143       'c'  
27                109       0x6D       0155       'm'                  | 27                111       0x6F       0157       'o'  
28                  0        0x0         00                            | 28                109       0x6D       0155       'm'  
29                  0        0x0         00                            | 29                  1        0x1         01  
30                  1        0x1         01                            | 30                  3        0x3         03  
31                  0        0x0         00                            | 31                119       0x77       0167       'w'  
32                  1        0x1         01                            | 32                119       0x77       0167       'w'  
33                192       0xC0       0300                            | 33                119       0x77       0167       'w'  
[snip]

./side "/home/mikal/opensource-stable/mi/i - < %s" 
   ../shdns/sample-response ../shdns/shdns-response  | less

/home/mikal/opensource-stable/mi/i - < ../shdns/sample-response        | /home/mikal/opensource-stable/mi/i - < ../shdns/shdns-response
                                                                       |
0                 135       0x87       0207                            | 0                 135       0x87       0207  
1                 210       0xD2       0322                            | 1                 210       0xD2       0322  
2                 133       0x85       0205                            | 2                  10        0xA        012  
3                 128       0x80       0200                            | 3                  56       0x38        070       '8'  
4                   0        0x0         00                            | 4                   0        0x0         00  
5                   1        0x1         01                            | 5                   0        0x0         00  
6                   0        0x0         00                            | 6                   1        0x1         01  
7                   1        0x1         01                            | 7                   0        0x0         00  
8                   0        0x0         00                            | 8                   1        0x1         01  
9                   1        0x1         01                            | 9                   0        0x0         00  
10                  0        0x0         00                            | 10                  0        0x0         00  
11                  0        0x0         00                            | 11                  0        0x0         00  
12                  3        0x3         03                            | 12                  0        0x0         00  
13                119       0x77       0167       'w'                  | 13                  3        0x3         03  
14                119       0x77       0167       'w'                  | 14                119       0x77       0167       'w'  
15                119       0x77       0167       'w'                  | 15                119       0x77       0167       'w'  
16                  7        0x7         07                            | 16                119       0x77       0167       'w'  
17                115       0x73       0163       's'                  | 17                  7        0x7         07  
18                116       0x74       0164       't'                  | 18                115       0x73       0163       's'  
19                105       0x69       0151       'i'                  | 19                116       0x74       0164       't'  
20                108       0x6C       0154       'l'                  | 20                105       0x69       0151       'i'  
21                108       0x6C       0154       'l'                  | 21                108       0x6C       0154       'l'  
22                104       0x68       0150       'h'                  | 22                108       0x6C       0154       'l'  
23                113       0x71       0161       'q'                  | 23                104       0x68       0150       'h'  
24                  3        0x3         03                            | 24                113       0x71       0161       'q'  
25                 99       0x63       0143       'c'                  | 25                  3        0x3         03  
26                111       0x6F       0157       'o'                  | 26                 99       0x63       0143       'c'  
27                109       0x6D       0155       'm'                  | 27                111       0x6F       0157       'o'  
28                  0        0x0         00                            | 28                109       0x6D       0155       'm'  
29                  0        0x0         00                            | 29                  1        0x1         01  
30                  1        0x1         01                            | 30                  3        0x3         03  
31                  0        0x0         00                            | 31                119       0x77       0167       'w'  
32                  1        0x1         01                            | 32                119       0x77       0167       'w'  
33                192       0xC0       0300                            | 33                119       0x77       0167       'w'  
[snip]

[snip]
cvs server: Logging cvs001/contrib/wxwindows/docs/pdf
cvs server: Logging cvs001/datasets
cvs server: Logging cvs001/docbook
cvs server: Logging cvs001/docbook/guide
cvs server: Logging cvs001/docbook/guide/figures
cvs server: Logging cvs001/lectures
cvs server: Logging cvs001/manuals
cvs server: Logging cvs001/meetings
cvs server: Logging cvs001/presentation
cvs server: Logging cvs001/prototype
cvs server: Logging cvs001/reports
cvs server: Logging cvs001/source
cvs [server aborted]: unrecognized operation '\x20' in /cvs/cvs001/source/cepLs.cpp,v
[root@localhost cvs001]# 

./side "/home/mikal/opensource-stable/mi/i - < %s" 
   ../shdns/sample-response ../shdns/shdns-response  | less

/home/mikal/opensource-stable/mi/i - < ../shdns/sample-response        | /home/mikal/opensource-stable/mi/i - < ../shdns/shdns-response
                                                                       |
0                 135       0x87       0207                            | 0                 135       0x87       0207  
1                 210       0xD2       0322                            | 1                 210       0xD2       0322  
2                 133       0x85       0205                            | 2                  10        0xA        012  
3                 128       0x80       0200                            | 3                  56       0x38        070       '8'  
4                   0        0x0         00                            | 4                   0        0x0         00  
5                   1        0x1         01                            | 5                   0        0x0         00  
6                   0        0x0         00                            | 6                   1        0x1         01  
7                   1        0x1         01                            | 7                   0        0x0         00  
8                   0        0x0         00                            | 8                   1        0x1         01  
9                   1        0x1         01                            | 9                   0        0x0         00  
10                  0        0x0         00                            | 10                  0        0x0         00  
11                  0        0x0         00                            | 11                  0        0x0         00  
12                  3        0x3         03                            | 12                  0        0x0         00  
13                119       0x77       0167       'w'                  | 13                  3        0x3         03  
14                119       0x77       0167       'w'                  | 14                119       0x77       0167       'w'  
15                119       0x77       0167       'w'                  | 15                119       0x77       0167       'w'  
16                  7        0x7         07                            | 16                119       0x77       0167       'w'  
17                115       0x73       0163       's'                  | 17                  7        0x7         07  
18                116       0x74       0164       't'                  | 18                115       0x73       0163       's'  
19                105       0x69       0151       'i'                  | 19                116       0x74       0164       't'  
20                108       0x6C       0154       'l'                  | 20                105       0x69       0151       'i'  
21                108       0x6C       0154       'l'                  | 21                108       0x6C       0154       'l'  
22                104       0x68       0150       'h'                  | 22                108       0x6C       0154       'l'  
23                113       0x71       0161       'q'                  | 23                104       0x68       0150       'h'  
24                  3        0x3         03                            | 24                113       0x71       0161       'q'  
25                 99       0x63       0143       'c'                  | 25                  3        0x3         03  
26                111       0x6F       0157       'o'                  | 26                 99       0x63       0143       'c'  
27                109       0x6D       0155       'm'                  | 27                111       0x6F       0157       'o'  
28                  0        0x0         00                            | 28                109       0x6D       0155       'm'  
29                  0        0x0         00                            | 29                  1        0x1         01  
30                  1        0x1         01                            | 30                  3        0x3         03  
31                  0        0x0         00                            | 31                119       0x77       0167       'w'  
32                  1        0x1         01                            | 32                119       0x77       0167       'w'  
33                192       0xC0       0300                            | 33                119       0x77       0167       'w'  
[snip]

// Disconnected UDP socket example: this example simply reads from clients (there can be more 
// than one), and returns what they said straight back to them. You'll note that we can't use 
// read and write to get to the traffic, as this is not available for disconnected UDP sockets.

#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

int main(int argc, char *argv[]){
  int lfd;
  struct sockaddr_in servaddr;
  struct sockaddr clientaddr;
  char buf[1024];
  size_t len;
  socklen_t clen;
  
  // We will listen with this file descriptor
  if((lfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0){
    fprintf(stderr, "Error whilst starting to listen\n");
    exit(42);
  }

  // Define what we are listening for
  bzero(&servaddr, sizeof(servaddr));
  servaddr.sin_family = AF_INET;
  servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
  servaddr.sin_port = htons(1234);

  // Bind to the address
  if(bind(lfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0){
    perror("Couldn't bind");
    exit(42);
  }
  
  // Do stuff
  while(1){
    len = 1024;
    printf("Reading...\n");
    clen = sizeof(clientaddr);
    if((len = recvfrom(lfd, buf, len, 0, (struct sockaddr *) &clientaddr, 
		       &clen)) < 0){
      perror("Socket read error");
      exit(42);
    }
    if(len == 0) break;

    // The buffer is not null terminated
    buf[len] = '\0';
    printf("Read: %s\n", buf);

    // And send it straight back
    if(sendto(lfd, buf, len, 0, &clientaddr, clen) < 0){
      perror("Socket write error");
      exit(42);
    }
  }
}

// Disconnected UDP socket example: this example simply waits fro traffic, and the starts
// a process to deal with the results. One process per packet, one packet per process.
// This version wont work, because the socket is not connected. In fact, cat is smart enough
// to warn us about this:
//
//           cat: write error: Transport endpoint is not connected

#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/poll.h>
#include <netinet/in.h>

int main(int argc, char *argv[]){
  int lfd;
  struct sockaddr_in servaddr;
  struct pollfd pfd;
  
  // We will listen with this file descriptor
  if((lfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0){
    fprintf(stderr, "Error whilst starting to listen\n");
    exit(42);
  }

  // Define what we are listening for
  bzero(&servaddr, sizeof(servaddr));
  servaddr.sin_family = AF_INET;
  servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
  servaddr.sin_port = htons(1234);

  // Bind to the address
  if(bind(lfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0){
    perror("Couldn't bind");
    exit(42);
  }

  // Setup the list of file descriptors we want to wait for events on
  pfd.fd = lfd;
  pfd.events = POLLIN | POLLPRI;
  
  // Do stuff
  while(1){
    if(poll(&pfd, 1, -1) < 0){
      perror("Waiting for new data failled");
      exit(42);
    }

    printf("Data arrived\n");

    // Spawn a child to handle this packet
    switch(fork()){
    case -1:
      perror("Couldn't spawn child to handle connection");
      exit(42);
      
    case 0:
      // Child process -- setup the file descriptors, and the run the helper application
      dup2(lfd, 0);
      dup2(lfd, 1);

      execl("/bin/cat", "cat", NULL);
      perror("Exec failled");
      exit(42);
      break;

    default:
      // Parent process
      break;
    }
  }
}

// Connected UDP socket example: this example simply reads from clients (there can be more 
// than one), and returns what they said straight back to them. You'll note that we can now use 
// read and write to get to the traffic...

#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

int main(int argc, char *argv[]){
  int lfd;
  struct sockaddr_in servaddr;
  struct sockaddr clientaddr;
  char buf[1024];
  size_t len;
  socklen_t clen;
  
  // We will listen with this file descriptor
  if((lfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0){
    fprintf(stderr, "Error whilst starting to listen\n");
    exit(42);
  }

  // Define what we are listening for
  bzero(&servaddr, sizeof(servaddr));
  servaddr.sin_family = AF_INET;
  servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
  servaddr.sin_port = htons(1234);

  // Bind to the address
  if(bind(lfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0){
    perror("Couldn't bind");
    exit(42);
  }
  
  // Do stuff
  while(1){
    // We need to peek at the first part of the packet to determine who to connect to
    len = 1;
    printf("Reading...\n");
    clen = sizeof(clientaddr);
    if((len = recvfrom(lfd, buf, len, MSG_PEEK, (struct sockaddr *) &clientaddr, 
		       &clen)) < 0){
      perror("Socket peek error");
      exit(42);
    }
    if(len == 0) break;

    // Connect
    if(connect(lfd, &clientaddr, clen) < 0){
      perror("Could not connect");
      exit(42);
    }

    // And now we can just use the normal read and write
    len = 1024;
    if((len = read(lfd, buf, len)) < 0){
      perror("Socket read error");
      exit(42);
    }
    if(write(lfd, buf, len) < 0){
      perror("Socket write error");
      exit(42);
    }
  }
}

// Connected UDP socket example: this example this example simply waits fro traffic, and the 
// starts a process to deal with the results. One process per packet, one packet per process. 
// You'll note that we can now use read and write to get to the traffic, and that this all
// works...

#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

int main(int argc, char *argv[]){
  int lfd;
  struct sockaddr_in servaddr;
  struct sockaddr clientaddr;
  char buf[1024];
  size_t len;
  socklen_t clen;
  
  // We will listen with this file descriptor
  if((lfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0){
    fprintf(stderr, "Error whilst starting to listen\n");
    exit(42);
  }

  // Define what we are listening for
  bzero(&servaddr, sizeof(servaddr));
  servaddr.sin_family = AF_INET;
  servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
  servaddr.sin_port = htons(1234);

  // Bind to the address
  if(bind(lfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0){
    perror("Couldn't bind");
    exit(42);
  }
  
  // Do stuff
  while(1){
    // We need to peek at the first part of the packet to determine who to connect to
    len = 1;
    printf("Reading...\n");
    clen = sizeof(clientaddr);
    if((len = recvfrom(lfd, buf, len, MSG_PEEK, (struct sockaddr *) &clientaddr, 
		       &clen)) < 0){
      perror("Socket peek error");
      exit(42);
    }
    if(len == 0) break;

    // Connect
    if(connect(lfd, &clientaddr, clen) < 0){
      perror("Could not connect");
      exit(42);
    }
    
    printf("Data arrived\n");

    // Spawn a child to handle this packet
    switch(fork()){
    case -1:
      perror("Couldn't spawn child to handle connection");
      exit(42);
      
    case 0:
      // Child process -- setup the file descriptors, and the run the helper application
      dup2(lfd, 0);
      dup2(lfd, 1);

      execl("/bin/cat", "cat", NULL);
      perror("Exec failled");
      exit(42);
      break;

    default:
      // Parent process
      break;
    }
  }
}

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