/*-
 * Copyright (c) 2004 Free (Olivier Beyssac)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */
#include <stdio.h>
#include <unistd.h>
#include <ctype.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/types.h>
#include <string.h>
#include <errno.h>
#include "options.h"
#include "client.h"
#include "utils.h"
#include "net.h"


#define timeout_read(sd,buf,rd,errorcode) \
  do {                                                   \
    struct timeval tv;                                   \
    fd_set rset;                                         \
                                                         \
    /* Handle timeout */                                 \
    tv.tv_sec = opt.notify_timeout;                      \
    tv.tv_usec = 0;                                      \
    FD_ZERO(&rset);                                      \
    FD_SET(sd, &rset);                                   \
    net_socket_set_nb(sd);                               \
    if ((select(sd + 1, &rset, NULL, NULL, &tv)) <= 0) { \
      close(sd);                                         \
      return errorcode;                                  \
    }                                                    \
                                                         \
    if ((rd = read(sd, &buf, sizeof(buf))) <= 0) {       \
      close(sd);                                         \
      return errorcode;                                  \
    }                                                    \
  } while (0)


extern struct options opt;

/* Connect to host:port and return a socket descriptor if success,
   -1 otherwise */
extern int client_connect(const char *host, const char *port)
{
  int sd;
  char buf[MAX_CMD_LEN];
  ssize_t rd;
  
  if ((sd = net_client_sock_create(host, port)) == -1)
    return -1;

  /* Read banner and return -1 if error/timeout */
  timeout_read(sd, buf, rd, -1);
  
  return sd;
}


/* Send a command and return the result code or -1 */
extern int client_send_cmdi(const int sd, const int cmd, const char *value)
{
  char *buf;

  if ((buf = client_send_cmdc(sd, cmd, value)) == NULL)
    return -1;

  if (!isdigit(buf[0]) || !isdigit(buf[1]) || !isdigit(buf[2]))
    return -1;

  return (buf[0] - '0') * 100 + (buf[1] - '0') * 10 + buf[2] - '0';
}


/* Send a command and return the resulting message line or NULL */
extern char *client_send_cmdc(const int sd, const int cmd, const char *value)
{
  static char buf[MAX_CMD_LEN];
  ssize_t rd;

  switch (cmd) {
  case CMD_SUBMIT:
    sprintf(buf, "ip=%s\r\n", value);
    break;
  case CMD_INSERT:
    sprintf(buf, "ipbl=%s\r\n", value);
    break;
  case CMD_DECR:
    sprintf(buf, "ipdecr=%s\r\n", value);
    break;
  case CMD_QUERY:
  default:
    sprintf(buf, "ip?=%s\r\n", value);
  }
  
  write(sd, buf, strlen(buf));

  /* Read and return NULL if timeout/error */
  timeout_read(sd, buf, rd, NULL);
  
  if (rd < 2) {
    return NULL;
  }
  buf[rd-2] = '\0';

  return buf;
}