/*
 * Copyright (c) 1995 Danny Gasparovski.
 *
 * Please read the file COPYRIGHT for the
 * terms and conditions of the copyright.
 */

#define WANT_SYS_IOCTL_H
#include <slirp.h>

#ifndef HAVE_INET_ATON
int
inet_aton(const char *cp, struct in_addr *ia)
{
    u_int32_t addr = inet_addr(cp);
    if (addr == 0xffffffff)
        return 0;
    ia->s_addr = addr;
    return 1;
}
#endif

/*
 * Get our IP address and put it in our_addr
 */
void
getouraddr(PNATState pData)
{
    our_addr.s_addr = loopback_addr.s_addr;
}

struct quehead
{
    struct quehead *qh_link;
    struct quehead *qh_rlink;
};

void
insque(PNATState pData, void *a, void *b)
{
    register struct quehead *element = (struct quehead *) a;
    register struct quehead *head = (struct quehead *) b;
    element->qh_link = head->qh_link;
    head->qh_link = (struct quehead *)element;
    element->qh_rlink = (struct quehead *)head;
    ((struct quehead *)(element->qh_link))->qh_rlink = (struct quehead *)element;
}

void
remque(PNATState pData, void *a)
{
    register struct quehead *element = (struct quehead *) a;
    ((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink;
    ((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link;
    element->qh_rlink = NULL;
    /*  element->qh_link = NULL;  TCP FIN1 crashes if you do this.  Why ? */
}

int
add_exec(struct ex_list **ex_ptr, int do_pty, char *exec, int addr, int port)
{
    struct ex_list *tmp_ptr;

    /* First, check if the port is "bound" */
    for (tmp_ptr = *ex_ptr; tmp_ptr; tmp_ptr = tmp_ptr->ex_next)
    {
        if (port == tmp_ptr->ex_fport && addr == tmp_ptr->ex_addr)
            return -1;
    }

    tmp_ptr = *ex_ptr;
    *ex_ptr = (struct ex_list *)malloc(sizeof(struct ex_list));
    (*ex_ptr)->ex_fport = port;
    (*ex_ptr)->ex_addr = addr;
    (*ex_ptr)->ex_pty = do_pty;
    (*ex_ptr)->ex_exec = strdup(exec);
    (*ex_ptr)->ex_next = tmp_ptr;
    return 0;
}


/*
 * Set fd blocking and non-blocking
 */
void
fd_nonblock(int fd)
{
#ifdef FIONBIO
    int opt = 1;

    ioctlsocket(fd, FIONBIO, &opt);
#else
    int opt;

    opt = fcntl(fd, F_GETFL, 0);
    opt |= O_NONBLOCK;
    fcntl(fd, F_SETFL, opt);
#endif
}

void
fd_block(int fd)
{
#ifdef FIONBIO
    int opt = 0;

    ioctlsocket(fd, FIONBIO, &opt);
#else
    int opt;

    opt = fcntl(fd, F_GETFL, 0);
    opt &= ~O_NONBLOCK;
    fcntl(fd, F_SETFL, opt);
#endif
}