sockopt.c

Apache V2.0.15 Alpha For Linuxhttpd-2_0_15-alpha.tar.Z

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 * The Apache Software License, Version 1.1
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 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
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 *    if and wherever such third-party acknowledgments normally appear.
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 *
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 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
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 */

#include "networkio.h"
#include "apr_strings.h"

static int is_option_set(apr_int32_t mask, apr_int32_t option)
{
    return (mask & option) == option;
}

static void set_option(apr_int32_t *mask, apr_int32_t option, int on)
{
    if (on)
        *mask |= option;
    else
        *mask &= ~option;
}

static apr_status_t soblock(int sd)
{
/* BeOS uses setsockopt at present for non blocking... */
#ifndef BEOS
    int fd_flags;

    fd_flags = fcntl(sd, F_GETFL, 0);
#if defined(O_NONBLOCK)
    fd_flags &= ~O_NONBLOCK;
#elif defined(O_NDELAY)
    fd_flags &= ~O_NDELAY;
#elif defined(FNDELAY)
    fd_flags &= ~O_FNDELAY;
#else
    /* XXXX: this breaks things, but an alternative isn't obvious...*/
    return -1;
#endif
    if (fcntl(sd, F_SETFL, fd_flags) == -1) {
        return errno;
    }
#else
    int on = 0;
    if (setsockopt(sd, SOL_SOCKET, SO_NONBLOCK, &on, sizeof(int)) < 0)
        return errno;
#endif /* BEOS */
    return APR_SUCCESS;
}

static apr_status_t sononblock(int sd)
{
#ifndef BEOS
    int fd_flags;

    fd_flags = fcntl(sd, F_GETFL, 0);
#if defined(O_NONBLOCK)
    fd_flags |= O_NONBLOCK;
#elif defined(O_NDELAY)
    fd_flags |= O_NDELAY;
#elif defined(FNDELAY)
    fd_flags |= O_FNDELAY;
#else
    /* XXXX: this breaks things, but an alternative isn't obvious...*/
    return -1;
#endif
    if (fcntl(sd, F_SETFL, fd_flags) == -1) {
        return errno;
    }
#else
    int on = 1;
    if (setsockopt(sd, SOL_SOCKET, SO_NONBLOCK, &on, sizeof(int)) < 0)
        return errno;
#endif /* BEOS */
    return APR_SUCCESS;
}

apr_status_t apr_setsocketopt(apr_socket_t *sock, apr_int32_t opt, apr_int32_t on)
{
    int one;
    apr_status_t stat;

    if (on)
        one = 1;
    else
        one = 0;
    if (opt & APR_SO_KEEPALIVE) {
#ifdef SO_KEEPALIVE
        if (on != is_option_set(sock->netmask, APR_SO_KEEPALIVE)){
            if (setsockopt(sock->socketdes, SOL_SOCKET, SO_KEEPALIVE, (void *)&one, sizeof(int)) == -1) {
                return errno;
            }
            set_option(&sock->netmask,APR_SO_KEEPALIVE, on);
        }
#else
        return APR_ENOTIMPL;
#endif
    }
    if (opt & APR_SO_DEBUG) {
        if (on != is_option_set(sock->netmask, APR_SO_DEBUG)){
            if (setsockopt(sock->socketdes, SOL_SOCKET, SO_DEBUG, (void *)&one, sizeof(int)) == -1) {
                return errno;
            }
            set_option(&sock->netmask, APR_SO_DEBUG, on);
        }
    }
    if (opt & APR_SO_REUSEADDR) {
        if (on != is_option_set(sock->netmask, APR_SO_REUSEADDR)){
            if (setsockopt(sock->socketdes, SOL_SOCKET, SO_REUSEADDR, (void *)&one, sizeof(int)) == -1) {
                return errno;
            }
            set_option(&sock->netmask, APR_SO_REUSEADDR, on);
        }
    }
    if (opt & APR_SO_SNDBUF) {
#ifdef SO_SNDBUF
        if (is_option_set(sock->netmask, APR_SO_SNDBUF) != on){
            if (setsockopt(sock->socketdes, SOL_SOCKET, SO_SNDBUF, (void *)&on, sizeof(int)) == -1) {
                return errno;
            }
            set_option(&sock->netmask, APR_SO_SNDBUF, on);
        }
#else
        return APR_ENOTIMPL;
#endif
    }
    if (opt & APR_SO_NONBLOCK) {
        if (is_option_set(sock->netmask, APR_SO_NONBLOCK) != on){
            if (on) {
                if ((stat = sononblock(sock->socketdes)) != APR_SUCCESS) 
                    return stat;
            }
            else {
                if ((stat = soblock(sock->socketdes)) != APR_SUCCESS)
                    return stat;
            }
            set_option(&sock->netmask, APR_SO_NONBLOCK, on);
        }
    }
    if (opt & APR_SO_LINGER) {
#ifdef SO_LINGER
        if (is_option_set(sock->netmask, APR_SO_LINGER) != on){
            struct linger li;
            li.l_onoff = on;
            li.l_linger = MAX_SECS_TO_LINGER;
            if (setsockopt(sock->socketdes, SOL_SOCKET, SO_LINGER, (char *) &li, sizeof(struct linger)) == -1) {
                return errno;
            }
            set_option(&sock->netmask, APR_SO_LINGER, on);
        }
#else
        return APR_ENOTIMPL;
#endif
    }
    if (opt & APR_SO_TIMEOUT) { 
        /* don't do the fcntl foo more than needed */ 
        if (on >= 0 && sock->timeout < 0){
            if (is_option_set(sock->netmask, APR_SO_NONBLOCK) != 1){
                if ((stat = sononblock(sock->socketdes)) != APR_SUCCESS){
                    return stat;
                }
            }
        } 
        else if (on < 0 && sock->timeout >= 0){
            if (is_option_set(sock->netmask, APR_SO_NONBLOCK) != 0){ 
                if ((stat = soblock(sock->socketdes)) != APR_SUCCESS) { 
                    return stat; 
                }
            } 
        }
        sock->timeout = on; 
        set_option(&sock->netmask, APR_SO_TIMEOUT, on);
    } 
    if (opt & APR_TCP_NODELAY) {
#if defined(TCP_NODELAY)
        if (is_option_set(sock->netmask, APR_TCP_NODELAY) != on){
            if (setsockopt(sock->socketdes, IPPROTO_TCP, TCP_NODELAY, (void *)&on, sizeof(int)) == -1) {
                return errno;
            }
            set_option(&sock->netmask, APR_TCP_NODELAY, on);
        }
#else
        /* BeOS pre-BONE has TCP_NODELAY set by default.
         * As it can't be turned off we might as well check if they're asking
         * for it to be turned on!
         */
#ifdef BEOS
        if (on == 1)
            return APR_SUCCESS;
        else
#endif
        return APR_ENOTIMPL;
#endif
    }
    if (opt & APR_TCP_NOPUSH){
#if APR_TCP_NOPUSH_FLAG
        if (is_option_set(sock->netmask, APR_TCP_NOPUSH) != on){
            /* OK we're going to change some settings here... */
            /* TCP_NODELAY is mutually exclusive, so do we have it set? */
            if (is_option_set(sock->netmask, APR_TCP_NODELAY) == 1 && on){
                /* If we want to set NOPUSH then if we have the TCP_NODELAY
                 * flag set we need to switch it off...
                 */
                int tmpflag = 0;
                if (setsockopt(sock->socketdes, IPPROTO_TCP, TCP_NODELAY,
                               (void*)&tmpflag, sizeof(int)) == -1){
                    return errno;
                }
                set_option(&sock->netmask, APR_RESET_NODELAY, 1);
                set_option(&sock->netmask, APR_TCP_NODELAY, 0);
            } else if (on){
                set_option(&sock->netmask, APR_RESET_NODELAY, 0);
            }
            /* OK, now we can just set the TCP_NOPUSH flag accordingly...*/
            if (setsockopt(sock->socketdes, IPPROTO_TCP, APR_TCP_NOPUSH_FLAG,
                           (void*)&on, sizeof(int)) == -1){
                return errno;
            }
            set_option(&sock->netmask, APR_TCP_NOPUSH, on);
            if (!on && is_option_set(sock->netmask, APR_RESET_NODELAY)){
                int tmpflag = 1;
                if (setsockopt(sock->socketdes, IPPROTO_TCP, TCP_NODELAY,
                               (void*)&tmpflag, sizeof(int)) == -1){
                    return errno;
                }
                set_option(&sock->netmask, APR_RESET_NODELAY,0);
                set_option(&sock->netmask, APR_TCP_NODELAY, 1);
            }
        }
#else
        return APR_ENOTIMPL;
#endif
    }

    return APR_SUCCESS; 
}         

apr_status_t apr_getsocketopt(apr_socket_t *sock, apr_int32_t opt, apr_int32_t *on)
{
    switch(opt) {
        case APR_SO_TIMEOUT:
            *on = sock->timeout;
            break;
        default:
            *on = is_option_set(sock->netmask, opt);
    }
    return APR_SUCCESS;
}

apr_status_t apr_gethostname(char *buf, apr_int32_t len, apr_pool_t *cont)
{
    if (gethostname(buf, len) == -1)
        return errno;
    else
        return APR_SUCCESS;
}