#include <unistd.h>

#include <string.h>

#include "alloc.h"
#include "buffer.h"
#include "byte.h"
#include "exit.h"
#include "logmsg.h"
#include "str.h"
#include "stralloc.h"

#include "dns.h"
#include "spf.h"

#define WHO "spfquery"

void die(int e, char *s)
{
  buffer_putsflush(buffer_2, s);
  _exit(e);
}

void die_nomem()
{
  die(111, "fatal: out of memory\n");
}

static stralloc heloin = {0};
static stralloc mfin = {0};
static stralloc spflocal = {0};
static stralloc spfbounce = {0};

int main(int argc, char **argv)
{
  stralloc spfip = {0};
  int flag = 0;
  int r;
  int verbose = 0;
  flagip6 = 1;

  if (argc < 4)
    logmsg(
        WHO,
        100,
        USAGE,
        "spfquery <sender-ip> <sender-helo/ehlo> <envelope-from> [<local rules>] [-v(erbose) ]\n");

  if (!stralloc_copys(&spfip, argv[1])) die_nomem();
  if (!stralloc_0(&spfip)) die_nomem();
  r = byte_chr(spfip.s, spfip.len, ':');
  if (r < spfip.len) flag = 1;

  if (!stralloc_copys(&heloin, argv[2])) die_nomem();
  if (!stralloc_0(&heloin)) die_nomem();

  if (!stralloc_copys(&mfin, argv[3])) die_nomem();
  if (!stralloc_0(&mfin)) die_nomem();

  if (argc > 4) {
    if (!byte_diff(argv[4], 2, "-v"))
      verbose = 1;
    else {
      if (!stralloc_copys(&spflocal, argv[4])) die_nomem();
      if (spflocal.len && !stralloc_0(&spflocal)) die_nomem();
    }
  }

  if (argc > 5) {
    if (!byte_diff(argv[5], 2, "-v")) verbose = 1;
  }

  if (!stralloc_copys(&spfexplain, SPF_DEFEXP)) die_nomem();
  if (!stralloc_0(&spfexplain)) die_nomem();

  DNS_INIT
  r = spf_query(spfip.s, heloin.s, mfin.s, "localhost", flag);
  if (r == SPF_NOMEM) die_nomem();

  buffer_puts(buffer_1, "result=");
  switch (r) {
    case SPF_ME:       buffer_puts(buffer_1, "loopback"); break;
    case SPF_OK:       buffer_puts(buffer_1, "pass"); break;
    case SPF_NONE:     buffer_puts(buffer_1, "none"); break;
    case SPF_UNKNOWN:  buffer_puts(buffer_1, "unknown"); break;
    case SPF_NEUTRAL:  buffer_puts(buffer_1, "neutral"); break;
    case SPF_SOFTFAIL: buffer_puts(buffer_1, "softfail"); break;
    case SPF_FAIL:     buffer_puts(buffer_1, "fail"); break;
    case SPF_ERROR:    buffer_puts(buffer_1, "error"); break;
    case SPF_SYNTAX:   buffer_puts(buffer_1, "IP address syntax error"); break;
    default:           buffer_puts(buffer_1, "undefined"); break;
  }

  buffer_putsflush(buffer_1, "\n");
  if (r == SPF_SYNTAX) _exit(1);

  if (verbose) {
    buffer_puts(buffer_1, "SPF records read: \n");
    buffer_put(buffer_1, spfrecord.s, spfrecord.len);
  }

  buffer_puts(buffer_1, "SPF information evaluated: ");
  buffer_put(buffer_1, spfinfo.s, spfinfo.len);
  buffer_putsflush(buffer_1, "\n");

  if (r == SPF_FAIL) {
    buffer_puts(buffer_1, "SPF results returned: ");
    if (!spf_parse(&spfbounce, spfexpmsg.s, expdomain.s)) die_nomem();
    buffer_put(buffer_1, spfbounce.s, spfbounce.len);
    buffer_putsflush(buffer_1, "\n");
  }

  _exit(0);
}