pop3.c

     * POP3 over HTTP and thus we accidentally avoid setting this value
     * otherwise.
     */
    conn->bits.close = FALSE;
#else
    failf(data, "POP3 over http proxy requires HTTP support built-in!");
    return CURLE_UNSUPPORTED_PROTOCOL;
#endif
  }

  data->state.path++;   /* don't include the initial slash */

  return CURLE_OK;
}

/* this is the 5-bytes End-Of-Body marker for POP3 */
#define POP3_EOB "\x0d\x0a\x2e\x0d\x0a"
#define POP3_EOB_LEN 5

/*
 * This function scans the body after the end-of-body and writes everything
 * until the end is found.
 */
CURLcode Curl_pop3_write(struct connectdata *conn,
                         char *str,
                         size_t nread)
{
  /* This code could be made into a special function in the handler struct. */
  CURLcode result;
  struct SessionHandle *data = conn->data;
  struct SingleRequest *k = &data->req;

  /* Detect the end-of-body marker, which is 5 bytes:
     0d 0a 2e 0d 0a. This marker can of course be spread out
     over up to 5 different data chunks. Deal with it! */
  struct pop3_conn *pop3c = &conn->proto.pop3c;
  size_t checkmax = (nread >= POP3_EOB_LEN?POP3_EOB_LEN:nread);
  size_t checkleft = POP3_EOB_LEN-pop3c->eob;
  size_t check = (checkmax >= checkleft?checkleft:checkmax);

  if(!memcmp(POP3_EOB, &str[nread - check], check)) {
    /* substring match */
    pop3c->eob += check;
    if(pop3c->eob == POP3_EOB_LEN) {
      /* full match, the transfer is done! */
      str[nread - check] = '\0';
      nread -= check;
      k->keepon &= ~KEEP_RECV;
      pop3c->eob = 0;
    }
  }
  else if(pop3c->eob) {
    /* not a match, but we matched a piece before so we must now
       send that part as body first, before we move on and send
       this buffer */
    result = Curl_client_write(conn, CLIENTWRITE_BODY,
                               (char *)POP3_EOB, pop3c->eob);
    if(result)
      return result;
    pop3c->eob = 0;
  }

  result = Curl_client_write(conn, CLIENTWRITE_BODY, str, nread);

  return result;
}

#endif /* CURL_DISABLE_POP3 */