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icp.c

/*
 * Code contributed by Christian Grimm <grimm@rvs.uni-hannover.de> 
 * and patched by Stephane Bortzmeyer. 
 *
 * $Id: icp.c,v 4.1 2002/09/25 13:00:29 bortz Exp $
 *
 */

#include "echoping.h"

#ifdef ICP


void *
make_icp_sendline (url, shost, opcode, length)
     const char *url;
     u_num32 *shost;
     icp_opcode opcode;
     int *length;

{
  icp_common_t *headerp = NULL;
  char *buf = NULL;
  char *urloffset = NULL;
  u_num32 flags = ICP_FLAG_SRC_RTT;
  u_num32 pad = 0;
  u_num32 reqnum = 4711;
  unsigned short buf_len;

  buf_len = sizeof (icp_common_t) + strlen (url) + 1;
  if (opcode == ICP_OP_QUERY)
    buf_len += sizeof (u_num32);
  buf = calloc (buf_len, 1);
  headerp = (icp_common_t *) buf;
  headerp->opcode = opcode;
  headerp->version = ICP_VERSION_CURRENT;
  headerp->length = htons (buf_len);
  headerp->reqnum = htonl (reqnum);
  headerp->flags = htonl (flags);
  headerp->pad = pad;
  if (shost)
    headerp->shostid = htonl (*shost);
  /* urloffset = (char *) ((int) buf + sizeof(icp_common_t)); */
  urloffset = (char *) (buf + sizeof (icp_common_t));
  if (opcode == ICP_OP_QUERY)
    urloffset += sizeof (u_num32);
  memcpy (urloffset, url, strlen (url));
  *length = buf_len;
  return buf;
}

int
recv_icp (sockfd, buf, retcode)
     int sockfd;
     char *buf;
     char *retcode;

{                       /*
                         * based on draft-wessels-icp-v2-02.txt 
                         */
  icp_common_t *headerp = (icp_common_t *) buf;
  int nr, length;
  unsigned char opcode;
  static char *icp_op_code[] = {
    /*  0 */ "ICP_OP_INVALID",
    /*  1 */ "ICP_OP_QUERY",
    /*  2 */ "ICP_OP_HIT",
    /*  3 */ "ICP_OP_MISS",
    /*  4 */ "ICP_OP_ERR",
    /*  5 */ "",
    /*  6 */ "",
    /*  7 */ "",
    /*  8 */ "",
    /*  9 */ "",
    /* 10 */ "ICP_OP_SECHO",
    /* 11 */ "ICP_OP_DECHO",
    /* 12 */ "",
    /* 13 */ "",
    /* 14 */ "",
    /* 15 */ "",
    /* 16 */ "",
    /* 17 */ "",
    /* 18 */ "",
    /* 19 */ "",
    /* 20 */ "",
    /* 21 */ "ICP_OP_MISS_NOFETCH",
    /* 22 */ "ICP_OP_DENIED",
    /* 23 */ "ICP_OP_HIT_OBJ"
  };


  nr = recvfrom (sockfd, buf, DEFLINE, 0, (struct sockaddr *) 0, (int *) 0);
  if (nr < 0)
    {
      if (timeout_flag)
      err_quit ("Timeout while reading");
      else
      err_sys ("No reply from ICP proxy server");
    }
  opcode = headerp->opcode;
  length = ntohs (headerp->length);
  sprintf (retcode, "ICP reply: \42%s\42", icp_op_code[opcode]);
  return length;
}


#endif /* ICP */

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