net.c 58.0 KB
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/*
 * QEMU System Emulator
 *
 * Copyright (c) 2003-2008 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <time.h>
#include <errno.h>
#include <sys/time.h>
#include <zlib.h>

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/* Needed early for HOST_BSD etc. */
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#include "config-host.h"

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#ifndef _WIN32
#include <sys/times.h>
#include <sys/wait.h>
#include <termios.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
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#include <sys/resource.h>
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#include <sys/socket.h>
#include <netinet/in.h>
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#include <net/if.h>
#ifdef __NetBSD__
#include <net/if_tap.h>
#endif
#ifdef __linux__
#include <linux/if_tun.h>
#endif
#include <arpa/inet.h>
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#include <dirent.h>
#include <netdb.h>
#include <sys/select.h>
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#ifdef HOST_BSD
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#include <sys/stat.h>
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#if defined(__FreeBSD__) || defined(__DragonFly__)
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#include <libutil.h>
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#else
#include <util.h>
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#endif
#elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
#include <freebsd/stdlib.h>
#else
#ifdef __linux__
#include <pty.h>
#include <malloc.h>
#include <linux/rtc.h>

/* For the benefit of older linux systems which don't supply it,
   we use a local copy of hpet.h. */
/* #include <linux/hpet.h> */
#include "hpet.h"

#include <linux/ppdev.h>
#include <linux/parport.h>
#endif
#ifdef __sun__
#include <sys/stat.h>
#include <sys/ethernet.h>
#include <sys/sockio.h>
#include <netinet/arp.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h> // must come after ip.h
#include <netinet/udp.h>
#include <netinet/tcp.h>
#include <net/if.h>
#include <syslog.h>
#include <stropts.h>
#endif
#endif
#endif

#if defined(__OpenBSD__)
#include <util.h>
#endif

#if defined(CONFIG_VDE)
#include <libvdeplug.h>
#endif

#ifdef _WIN32
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#include <windows.h>
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#include <malloc.h>
#include <sys/timeb.h>
#include <mmsystem.h>
#define getopt_long_only getopt_long
#define memalign(align, size) malloc(size)
#endif

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#include "qemu-common.h"
#include "net.h"
#include "monitor.h"
#include "sysemu.h"
#include "qemu-timer.h"
#include "qemu-char.h"
#include "audio/audio.h"
#include "qemu_socket.h"
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#include "qemu-log.h"
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#if defined(CONFIG_SLIRP)
#include "libslirp.h"
#endif


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static VLANState *first_vlan;

/***********************************************************/
/* network device redirectors */

#if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
static void hex_dump(FILE *f, const uint8_t *buf, int size)
{
    int len, i, j, c;

    for(i=0;i<size;i+=16) {
        len = size - i;
        if (len > 16)
            len = 16;
        fprintf(f, "%08x ", i);
        for(j=0;j<16;j++) {
            if (j < len)
                fprintf(f, " %02x", buf[i+j]);
            else
                fprintf(f, "   ");
        }
        fprintf(f, " ");
        for(j=0;j<len;j++) {
            c = buf[i+j];
            if (c < ' ' || c > '~')
                c = '.';
            fprintf(f, "%c", c);
        }
        fprintf(f, "\n");
    }
}
#endif

static int parse_macaddr(uint8_t *macaddr, const char *p)
{
    int i;
    char *last_char;
    long int offset;

    errno = 0;
    offset = strtol(p, &last_char, 0);    
    if (0 == errno && '\0' == *last_char &&
            offset >= 0 && offset <= 0xFFFFFF) {
        macaddr[3] = (offset & 0xFF0000) >> 16;
        macaddr[4] = (offset & 0xFF00) >> 8;
        macaddr[5] = offset & 0xFF;
        return 0;
    } else {
        for(i = 0; i < 6; i++) {
            macaddr[i] = strtol(p, (char **)&p, 16);
            if (i == 5) {
                if (*p != '\0')
                    return -1;
            } else {
                if (*p != ':' && *p != '-')
                    return -1;
                p++;
            }
        }
        return 0;    
    }

    return -1;
}

static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
{
    const char *p, *p1;
    int len;
    p = *pp;
    p1 = strchr(p, sep);
    if (!p1)
        return -1;
    len = p1 - p;
    p1++;
    if (buf_size > 0) {
        if (len > buf_size - 1)
            len = buf_size - 1;
        memcpy(buf, p, len);
        buf[len] = '\0';
    }
    *pp = p1;
    return 0;
}

int parse_host_src_port(struct sockaddr_in *haddr,
                        struct sockaddr_in *saddr,
                        const char *input_str)
{
    char *str = strdup(input_str);
    char *host_str = str;
    char *src_str;
    const char *src_str2;
    char *ptr;

    /*
     * Chop off any extra arguments at the end of the string which
     * would start with a comma, then fill in the src port information
     * if it was provided else use the "any address" and "any port".
     */
    if ((ptr = strchr(str,',')))
        *ptr = '\0';

    if ((src_str = strchr(input_str,'@'))) {
        *src_str = '\0';
        src_str++;
    }

    if (parse_host_port(haddr, host_str) < 0)
        goto fail;

    src_str2 = src_str;
    if (!src_str || *src_str == '\0')
        src_str2 = ":0";

    if (parse_host_port(saddr, src_str2) < 0)
        goto fail;

    free(str);
    return(0);

fail:
    free(str);
    return -1;
}

int parse_host_port(struct sockaddr_in *saddr, const char *str)
{
    char buf[512];
    struct hostent *he;
    const char *p, *r;
    int port;

    p = str;
    if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
        return -1;
    saddr->sin_family = AF_INET;
    if (buf[0] == '\0') {
        saddr->sin_addr.s_addr = 0;
    } else {
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        if (qemu_isdigit(buf[0])) {
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            if (!inet_aton(buf, &saddr->sin_addr))
                return -1;
        } else {
            if ((he = gethostbyname(buf)) == NULL)
                return - 1;
            saddr->sin_addr = *(struct in_addr *)he->h_addr;
        }
    }
    port = strtol(p, (char **)&r, 0);
    if (r == p)
        return -1;
    saddr->sin_port = htons(port);
    return 0;
}

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#if !defined(_WIN32) && 0
static int parse_unix_path(struct sockaddr_un *uaddr, const char *str)
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{
    const char *p;
    int len;

    len = MIN(108, strlen(str));
    p = strchr(str, ',');
    if (p)
	len = MIN(len, p - str);

    memset(uaddr, 0, sizeof(*uaddr));

    uaddr->sun_family = AF_UNIX;
    memcpy(uaddr->sun_path, str, len);

    return 0;
}
#endif

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void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
{
    snprintf(vc->info_str, sizeof(vc->info_str),
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             "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
             vc->model,
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             macaddr[0], macaddr[1], macaddr[2],
             macaddr[3], macaddr[4], macaddr[5]);
}

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static char *assign_name(VLANClientState *vc1, const char *model)
{
    VLANState *vlan;
    char buf[256];
    int id = 0;

    for (vlan = first_vlan; vlan; vlan = vlan->next) {
        VLANClientState *vc;

        for (vc = vlan->first_client; vc; vc = vc->next)
            if (vc != vc1 && strcmp(vc->model, model) == 0)
                id++;
    }

    snprintf(buf, sizeof(buf), "%s.%d", model, id);

    return strdup(buf);
}

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VLANClientState *qemu_new_vlan_client(VLANState *vlan,
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                                      const char *model,
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                                      const char *name,
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                                      IOReadHandler *fd_read,
                                      IOCanRWHandler *fd_can_read,
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                                      NetCleanup *cleanup,
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                                      void *opaque)
{
    VLANClientState *vc, **pvc;
    vc = qemu_mallocz(sizeof(VLANClientState));
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    vc->model = strdup(model);
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    if (name)
        vc->name = strdup(name);
    else
        vc->name = assign_name(vc, model);
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    vc->fd_read = fd_read;
    vc->fd_can_read = fd_can_read;
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    vc->cleanup = cleanup;
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    vc->opaque = opaque;
    vc->vlan = vlan;

    vc->next = NULL;
    pvc = &vlan->first_client;
    while (*pvc != NULL)
        pvc = &(*pvc)->next;
    *pvc = vc;
    return vc;
}

void qemu_del_vlan_client(VLANClientState *vc)
{
    VLANClientState **pvc = &vc->vlan->first_client;

    while (*pvc != NULL)
        if (*pvc == vc) {
            *pvc = vc->next;
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            if (vc->cleanup) {
                vc->cleanup(vc);
            }
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            free(vc->name);
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            free(vc->model);
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            qemu_free(vc);
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            break;
        } else
            pvc = &(*pvc)->next;
}

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VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
{
    VLANClientState **pvc = &vlan->first_client;

    while (*pvc != NULL)
        if ((*pvc)->opaque == opaque)
            return *pvc;
        else
            pvc = &(*pvc)->next;

    return NULL;
}

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int qemu_can_send_packet(VLANClientState *vc1)
{
    VLANState *vlan = vc1->vlan;
    VLANClientState *vc;

    for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
        if (vc != vc1) {
            if (vc->fd_can_read && vc->fd_can_read(vc->opaque))
                return 1;
        }
    }
    return 0;
}

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static void
qemu_deliver_packet(VLANClientState *sender, const uint8_t *buf, int size)
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{
    VLANClientState *vc;

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    for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
        if (vc != sender && !vc->link_down) {
            vc->fd_read(vc->opaque, buf, size);
        }
    }
}

void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
{
    VLANState *vlan = vc->vlan;
    VLANPacket *packet;

    if (vc->link_down)
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        return;

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#ifdef DEBUG_NET
    printf("vlan %d send:\n", vlan->id);
    hex_dump(stdout, buf, size);
#endif
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    if (vlan->delivering) {
        packet = qemu_malloc(sizeof(VLANPacket) + size);
        packet->next = vlan->send_queue;
        packet->sender = vc;
        packet->size = size;
        memcpy(packet->data, buf, size);
        vlan->send_queue = packet;
    } else {
        vlan->delivering = 1;
        qemu_deliver_packet(vc, buf, size);
        while ((packet = vlan->send_queue) != NULL) {
            qemu_deliver_packet(packet->sender, packet->data, packet->size);
            vlan->send_queue = packet->next;
            qemu_free(packet);
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        }
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        vlan->delivering = 0;
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    }
}

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static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
                               int iovcnt)
{
    uint8_t buffer[4096];
    size_t offset = 0;
    int i;

    for (i = 0; i < iovcnt; i++) {
        size_t len;

        len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
        memcpy(buffer + offset, iov[i].iov_base, len);
        offset += len;
    }

    vc->fd_read(vc->opaque, buffer, offset);

    return offset;
}

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static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
{
    size_t offset = 0;
    int i;

    for (i = 0; i < iovcnt; i++)
        offset += iov[i].iov_len;
    return offset;
}

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ssize_t qemu_sendv_packet(VLANClientState *vc1, const struct iovec *iov,
                          int iovcnt)
{
    VLANState *vlan = vc1->vlan;
    VLANClientState *vc;
    ssize_t max_len = 0;

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    if (vc1->link_down)
        return calc_iov_length(iov, iovcnt);

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    for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
        ssize_t len = 0;

        if (vc == vc1)
            continue;

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        if (vc->link_down)
            len = calc_iov_length(iov, iovcnt);
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        if (vc->fd_readv)
            len = vc->fd_readv(vc->opaque, iov, iovcnt);
        else if (vc->fd_read)
            len = vc_sendv_compat(vc, iov, iovcnt);

        max_len = MAX(max_len, len);
    }

    return max_len;
}

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#if defined(CONFIG_SLIRP)

/* slirp network adapter */

static int slirp_inited;
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static int slirp_restrict;
static char *slirp_ip;
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static VLANClientState *slirp_vc;

int slirp_can_output(void)
{
    return !slirp_vc || qemu_can_send_packet(slirp_vc);
}

void slirp_output(const uint8_t *pkt, int pkt_len)
{
#ifdef DEBUG_SLIRP
    printf("slirp output:\n");
    hex_dump(stdout, pkt, pkt_len);
#endif
    if (!slirp_vc)
        return;
    qemu_send_packet(slirp_vc, pkt, pkt_len);
}

int slirp_is_inited(void)
{
    return slirp_inited;
}

static void slirp_receive(void *opaque, const uint8_t *buf, int size)
{
#ifdef DEBUG_SLIRP
    printf("slirp input:\n");
    hex_dump(stdout, buf, size);
#endif
    slirp_input(buf, size);
}

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static int slirp_in_use;

static void net_slirp_cleanup(VLANClientState *vc)
{
    slirp_in_use = 0;
}

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static int net_slirp_init(VLANState *vlan, const char *model, const char *name)
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{
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    if (slirp_in_use) {
        /* slirp only supports a single instance so far */
        return -1;
    }
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    if (!slirp_inited) {
        slirp_inited = 1;
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        slirp_init(slirp_restrict, slirp_ip);
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    }
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    slirp_vc = qemu_new_vlan_client(vlan, model, name,
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                                    slirp_receive, NULL, net_slirp_cleanup, NULL);
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    slirp_vc->info_str[0] = '\0';
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    slirp_in_use = 1;
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    return 0;
}

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void net_slirp_redir(Monitor *mon, const char *redir_str)
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{
    int is_udp;
    char buf[256], *r;
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    const char *p, *errmsg;
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    struct in_addr guest_addr;
    int host_port, guest_port;

    if (!slirp_inited) {
        slirp_inited = 1;
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        slirp_init(slirp_restrict, slirp_ip);
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    }

    p = redir_str;
    if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
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        goto fail_syntax;
    if (!strcmp(buf, "tcp") || buf[0] == '\0') {
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        is_udp = 0;
    } else if (!strcmp(buf, "udp")) {
        is_udp = 1;
    } else {
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        goto fail_syntax;
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    }

    if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
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        goto fail_syntax;
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    host_port = strtol(buf, &r, 0);
    if (r == buf)
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        goto fail_syntax;
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    if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
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        goto fail_syntax;
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    if (buf[0] == '\0') {
        pstrcpy(buf, sizeof(buf), "10.0.2.15");
    }
    if (!inet_aton(buf, &guest_addr))
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        goto fail_syntax;
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    guest_port = strtol(p, &r, 0);
    if (r == p)
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        goto fail_syntax;
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    if (slirp_redir(is_udp, host_port, guest_addr, guest_port) < 0) {
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        errmsg = "could not set up redirection\n";
        goto fail;
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    }
    return;
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 fail_syntax:
    errmsg = "invalid redirection format\n";
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 fail:
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    if (mon) {
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        monitor_printf(mon, "%s", errmsg);
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    } else {
        fprintf(stderr, "qemu: %s", errmsg);
        exit(1);
    }
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}

#ifndef _WIN32

static char smb_dir[1024];

static void erase_dir(char *dir_name)
{
    DIR *d;
    struct dirent *de;
    char filename[1024];

    /* erase all the files in the directory */
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    if ((d = opendir(dir_name)) != NULL) {
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        for(;;) {
            de = readdir(d);
            if (!de)
                break;
            if (strcmp(de->d_name, ".") != 0 &&
                strcmp(de->d_name, "..") != 0) {
                snprintf(filename, sizeof(filename), "%s/%s",
                         smb_dir, de->d_name);
                if (unlink(filename) != 0)  /* is it a directory? */
                    erase_dir(filename);
            }
        }
        closedir(d);
        rmdir(dir_name);
    }
}

/* automatic user mode samba server configuration */
static void smb_exit(void)
{
    erase_dir(smb_dir);
}

/* automatic user mode samba server configuration */
void net_slirp_smb(const char *exported_dir)
{
    char smb_conf[1024];
    char smb_cmdline[1024];
    FILE *f;

    if (!slirp_inited) {
        slirp_inited = 1;
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        slirp_init(slirp_restrict, slirp_ip);
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    }

    /* XXX: better tmp dir construction */
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    snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%ld", (long)getpid());
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    if (mkdir(smb_dir, 0700) < 0) {
        fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
        exit(1);
    }
    snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");

    f = fopen(smb_conf, "w");
    if (!f) {
        fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
        exit(1);
    }
    fprintf(f,
            "[global]\n"
            "private dir=%s\n"
            "smb ports=0\n"
            "socket address=127.0.0.1\n"
            "pid directory=%s\n"
            "lock directory=%s\n"
            "log file=%s/log.smbd\n"
            "smb passwd file=%s/smbpasswd\n"
            "security = share\n"
            "[qemu]\n"
            "path=%s\n"
            "read only=no\n"
            "guest ok=yes\n",
            smb_dir,
            smb_dir,
            smb_dir,
            smb_dir,
            smb_dir,
            exported_dir
            );
    fclose(f);
    atexit(smb_exit);

    snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
             SMBD_COMMAND, smb_conf);

    slirp_add_exec(0, smb_cmdline, 4, 139);
}

#endif /* !defined(_WIN32) */
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void do_info_slirp(Monitor *mon)
722 723 724 725
{
    slirp_stats();
}

726 727 728
struct VMChannel {
    CharDriverState *hd;
    int port;
729
};
730 731 732 733 734 735 736 737 738 739 740 741 742

static int vmchannel_can_read(void *opaque)
{
    struct VMChannel *vmc = (struct VMChannel*)opaque;
    return slirp_socket_can_recv(4, vmc->port);
}

static void vmchannel_read(void *opaque, const uint8_t *buf, int size)
{
    struct VMChannel *vmc = (struct VMChannel*)opaque;
    slirp_socket_recv(4, vmc->port, buf, size);
}

743 744 745 746 747 748 749 750
#endif /* CONFIG_SLIRP */

#if !defined(_WIN32)

typedef struct TAPState {
    VLANClientState *vc;
    int fd;
    char down_script[1024];
751
    char down_script_arg[128];
752 753
} TAPState;

754 755
static int launch_script(const char *setup_script, const char *ifname, int fd);

A
aliguori 已提交
756 757 758 759 760 761 762 763 764 765 766 767 768
static ssize_t tap_receive_iov(void *opaque, const struct iovec *iov,
                               int iovcnt)
{
    TAPState *s = opaque;
    ssize_t len;

    do {
        len = writev(s->fd, iov, iovcnt);
    } while (len == -1 && (errno == EINTR || errno == EAGAIN));

    return len;
}

769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791
static void tap_receive(void *opaque, const uint8_t *buf, int size)
{
    TAPState *s = opaque;
    int ret;
    for(;;) {
        ret = write(s->fd, buf, size);
        if (ret < 0 && (errno == EINTR || errno == EAGAIN)) {
        } else {
            break;
        }
    }
}

static void tap_send(void *opaque)
{
    TAPState *s = opaque;
    uint8_t buf[4096];
    int size;

#ifdef __sun__
    struct strbuf sbuf;
    int f = 0;
    sbuf.maxlen = sizeof(buf);
792
    sbuf.buf = (char *)buf;
793 794 795 796 797 798 799 800 801
    size = getmsg(s->fd, NULL, &sbuf, &f) >=0 ? sbuf.len : -1;
#else
    size = read(s->fd, buf, sizeof(buf));
#endif
    if (size > 0) {
        qemu_send_packet(s->vc, buf, size);
    }
}

802 803 804 805 806 807 808 809 810 811 812 813
static void tap_cleanup(VLANClientState *vc)
{
    TAPState *s = vc->opaque;

    if (s->down_script[0])
        launch_script(s->down_script, s->down_script_arg, s->fd);

    qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
    close(s->fd);
    qemu_free(s);
}

814 815
/* fd support */

816 817 818 819
static TAPState *net_tap_fd_init(VLANState *vlan,
                                 const char *model,
                                 const char *name,
                                 int fd)
820 821 822 823 824
{
    TAPState *s;

    s = qemu_mallocz(sizeof(TAPState));
    s->fd = fd;
825 826
    s->vc = qemu_new_vlan_client(vlan, model, name, tap_receive,
                                 NULL, tap_cleanup, s);
A
aliguori 已提交
827
    s->vc->fd_readv = tap_receive_iov;
828
    qemu_set_fd_handler(s->fd, tap_send, NULL, s);
829
    snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
830 831 832
    return s;
}

833
#if defined (HOST_BSD) || defined (__FreeBSD_kernel__)
834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858
static int tap_open(char *ifname, int ifname_size)
{
    int fd;
    char *dev;
    struct stat s;

    TFR(fd = open("/dev/tap", O_RDWR));
    if (fd < 0) {
        fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
        return -1;
    }

    fstat(fd, &s);
    dev = devname(s.st_rdev, S_IFCHR);
    pstrcpy(ifname, ifname_size, dev);

    fcntl(fd, F_SETFL, O_NONBLOCK);
    return fd;
}
#elif defined(__sun__)
#define TUNNEWPPA       (('T'<<16) | 0x0001)
/*
 * Allocate TAP device, returns opened fd.
 * Stores dev name in the first arg(must be large enough).
 */
859
static int tap_alloc(char *dev, size_t dev_size)
860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875
{
    int tap_fd, if_fd, ppa = -1;
    static int ip_fd = 0;
    char *ptr;

    static int arp_fd = 0;
    int ip_muxid, arp_muxid;
    struct strioctl  strioc_if, strioc_ppa;
    int link_type = I_PLINK;;
    struct lifreq ifr;
    char actual_name[32] = "";

    memset(&ifr, 0x0, sizeof(ifr));

    if( *dev ){
       ptr = dev;
876
       while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987
       ppa = atoi(ptr);
    }

    /* Check if IP device was opened */
    if( ip_fd )
       close(ip_fd);

    TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
    if (ip_fd < 0) {
       syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
       return -1;
    }

    TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
    if (tap_fd < 0) {
       syslog(LOG_ERR, "Can't open /dev/tap");
       return -1;
    }

    /* Assign a new PPA and get its unit number. */
    strioc_ppa.ic_cmd = TUNNEWPPA;
    strioc_ppa.ic_timout = 0;
    strioc_ppa.ic_len = sizeof(ppa);
    strioc_ppa.ic_dp = (char *)&ppa;
    if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
       syslog (LOG_ERR, "Can't assign new interface");

    TFR(if_fd = open("/dev/tap", O_RDWR, 0));
    if (if_fd < 0) {
       syslog(LOG_ERR, "Can't open /dev/tap (2)");
       return -1;
    }
    if(ioctl(if_fd, I_PUSH, "ip") < 0){
       syslog(LOG_ERR, "Can't push IP module");
       return -1;
    }

    if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
	syslog(LOG_ERR, "Can't get flags\n");

    snprintf (actual_name, 32, "tap%d", ppa);
    pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);

    ifr.lifr_ppa = ppa;
    /* Assign ppa according to the unit number returned by tun device */

    if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
        syslog (LOG_ERR, "Can't set PPA %d", ppa);
    if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
        syslog (LOG_ERR, "Can't get flags\n");
    /* Push arp module to if_fd */
    if (ioctl (if_fd, I_PUSH, "arp") < 0)
        syslog (LOG_ERR, "Can't push ARP module (2)");

    /* Push arp module to ip_fd */
    if (ioctl (ip_fd, I_POP, NULL) < 0)
        syslog (LOG_ERR, "I_POP failed\n");
    if (ioctl (ip_fd, I_PUSH, "arp") < 0)
        syslog (LOG_ERR, "Can't push ARP module (3)\n");
    /* Open arp_fd */
    TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
    if (arp_fd < 0)
       syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");

    /* Set ifname to arp */
    strioc_if.ic_cmd = SIOCSLIFNAME;
    strioc_if.ic_timout = 0;
    strioc_if.ic_len = sizeof(ifr);
    strioc_if.ic_dp = (char *)&ifr;
    if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
        syslog (LOG_ERR, "Can't set ifname to arp\n");
    }

    if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
       syslog(LOG_ERR, "Can't link TAP device to IP");
       return -1;
    }

    if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
        syslog (LOG_ERR, "Can't link TAP device to ARP");

    close (if_fd);

    memset(&ifr, 0x0, sizeof(ifr));
    pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
    ifr.lifr_ip_muxid  = ip_muxid;
    ifr.lifr_arp_muxid = arp_muxid;

    if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
    {
      ioctl (ip_fd, I_PUNLINK , arp_muxid);
      ioctl (ip_fd, I_PUNLINK, ip_muxid);
      syslog (LOG_ERR, "Can't set multiplexor id");
    }

    snprintf(dev, dev_size, "tap%d", ppa);
    return tap_fd;
}

static int tap_open(char *ifname, int ifname_size)
{
    char  dev[10]="";
    int fd;
    if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
       fprintf(stderr, "Cannot allocate TAP device\n");
       return -1;
    }
    pstrcpy(ifname, ifname_size, dev);
    fcntl(fd, F_SETFL, O_NONBLOCK);
    return fd;
}
M
malc 已提交
988 989 990 991 992 993
#elif defined (_AIX)
static int tap_open(char *ifname, int ifname_size)
{
    fprintf (stderr, "no tap on AIX\n");
    return -1;
}
994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058
#else
static int tap_open(char *ifname, int ifname_size)
{
    struct ifreq ifr;
    int fd, ret;

    TFR(fd = open("/dev/net/tun", O_RDWR));
    if (fd < 0) {
        fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
        return -1;
    }
    memset(&ifr, 0, sizeof(ifr));
    ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
    if (ifname[0] != '\0')
        pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
    else
        pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
    ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
    if (ret != 0) {
        fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
        close(fd);
        return -1;
    }
    pstrcpy(ifname, ifname_size, ifr.ifr_name);
    fcntl(fd, F_SETFL, O_NONBLOCK);
    return fd;
}
#endif

static int launch_script(const char *setup_script, const char *ifname, int fd)
{
    int pid, status;
    char *args[3];
    char **parg;

        /* try to launch network script */
        pid = fork();
        if (pid >= 0) {
            if (pid == 0) {
                int open_max = sysconf (_SC_OPEN_MAX), i;
                for (i = 0; i < open_max; i++)
                    if (i != STDIN_FILENO &&
                        i != STDOUT_FILENO &&
                        i != STDERR_FILENO &&
                        i != fd)
                        close(i);

                parg = args;
                *parg++ = (char *)setup_script;
                *parg++ = (char *)ifname;
                *parg++ = NULL;
                execv(setup_script, args);
                _exit(1);
            }
            while (waitpid(pid, &status, 0) != pid);
            if (!WIFEXITED(status) ||
                WEXITSTATUS(status) != 0) {
                fprintf(stderr, "%s: could not launch network script\n",
                        setup_script);
                return -1;
            }
        }
    return 0;
}

1059 1060
static int net_tap_init(VLANState *vlan, const char *model,
                        const char *name, const char *ifname1,
1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080
                        const char *setup_script, const char *down_script)
{
    TAPState *s;
    int fd;
    char ifname[128];

    if (ifname1 != NULL)
        pstrcpy(ifname, sizeof(ifname), ifname1);
    else
        ifname[0] = '\0';
    TFR(fd = tap_open(ifname, sizeof(ifname)));
    if (fd < 0)
        return -1;

    if (!setup_script || !strcmp(setup_script, "no"))
        setup_script = "";
    if (setup_script[0] != '\0') {
	if (launch_script(setup_script, ifname, fd))
	    return -1;
    }
1081
    s = net_tap_fd_init(vlan, model, name, fd);
1082
    snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1083 1084
             "ifname=%s,script=%s,downscript=%s",
             ifname, setup_script, down_script);
1085
    if (down_script && strcmp(down_script, "no")) {
1086
        snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1087 1088
        snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
    }
1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124
    return 0;
}

#endif /* !_WIN32 */

#if defined(CONFIG_VDE)
typedef struct VDEState {
    VLANClientState *vc;
    VDECONN *vde;
} VDEState;

static void vde_to_qemu(void *opaque)
{
    VDEState *s = opaque;
    uint8_t buf[4096];
    int size;

    size = vde_recv(s->vde, buf, sizeof(buf), 0);
    if (size > 0) {
        qemu_send_packet(s->vc, buf, size);
    }
}

static void vde_from_qemu(void *opaque, const uint8_t *buf, int size)
{
    VDEState *s = opaque;
    int ret;
    for(;;) {
        ret = vde_send(s->vde, buf, size, 0);
        if (ret < 0 && errno == EINTR) {
        } else {
            break;
        }
    }
}

1125 1126 1127 1128 1129 1130 1131 1132
static void vde_cleanup(VLANClientState *vc)
{
    VDEState *s = vc->opaque;
    qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
    vde_close(s->vde);
    qemu_free(s);
}

1133 1134
static int net_vde_init(VLANState *vlan, const char *model,
                        const char *name, const char *sock,
1135
                        int port, const char *group, int mode)
1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152
{
    VDEState *s;
    char *init_group = strlen(group) ? (char *)group : NULL;
    char *init_sock = strlen(sock) ? (char *)sock : NULL;

    struct vde_open_args args = {
        .port = port,
        .group = init_group,
        .mode = mode,
    };

    s = qemu_mallocz(sizeof(VDEState));
    s->vde = vde_open(init_sock, "QEMU", &args);
    if (!s->vde){
        free(s);
        return -1;
    }
1153 1154
    s->vc = qemu_new_vlan_client(vlan, model, name, vde_from_qemu,
                                 NULL, vde_cleanup, s);
1155
    qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1156
    snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1157 1158 1159 1160 1161 1162 1163 1164 1165 1166
             sock, vde_datafd(s->vde));
    return 0;
}
#endif

/* network connection */
typedef struct NetSocketState {
    VLANClientState *vc;
    int fd;
    int state; /* 0 = getting length, 1 = getting data */
1167 1168
    unsigned int index;
    unsigned int packet_len;
1169 1170 1171 1172 1173 1174
    uint8_t buf[4096];
    struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
} NetSocketState;

typedef struct NetSocketListenState {
    VLANState *vlan;
1175
    char *model;
1176
    char *name;
1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200
    int fd;
} NetSocketListenState;

/* XXX: we consider we can send the whole packet without blocking */
static void net_socket_receive(void *opaque, const uint8_t *buf, int size)
{
    NetSocketState *s = opaque;
    uint32_t len;
    len = htonl(size);

    send_all(s->fd, (const uint8_t *)&len, sizeof(len));
    send_all(s->fd, buf, size);
}

static void net_socket_receive_dgram(void *opaque, const uint8_t *buf, int size)
{
    NetSocketState *s = opaque;
    sendto(s->fd, buf, size, 0,
           (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
}

static void net_socket_send(void *opaque)
{
    NetSocketState *s = opaque;
1201 1202
    int size, err;
    unsigned l;
1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240
    uint8_t buf1[4096];
    const uint8_t *buf;

    size = recv(s->fd, buf1, sizeof(buf1), 0);
    if (size < 0) {
        err = socket_error();
        if (err != EWOULDBLOCK)
            goto eoc;
    } else if (size == 0) {
        /* end of connection */
    eoc:
        qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
        closesocket(s->fd);
        return;
    }
    buf = buf1;
    while (size > 0) {
        /* reassemble a packet from the network */
        switch(s->state) {
        case 0:
            l = 4 - s->index;
            if (l > size)
                l = size;
            memcpy(s->buf + s->index, buf, l);
            buf += l;
            size -= l;
            s->index += l;
            if (s->index == 4) {
                /* got length */
                s->packet_len = ntohl(*(uint32_t *)s->buf);
                s->index = 0;
                s->state = 1;
            }
            break;
        case 1:
            l = s->packet_len - s->index;
            if (l > size)
                l = size;
1241 1242 1243 1244 1245 1246 1247 1248 1249
            if (s->index + l <= sizeof(s->buf)) {
                memcpy(s->buf + s->index, buf, l);
            } else {
                fprintf(stderr, "serious error: oversized packet received,"
                    "connection terminated.\n");
                s->state = 0;
                goto eoc;
            }

1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338
            s->index += l;
            buf += l;
            size -= l;
            if (s->index >= s->packet_len) {
                qemu_send_packet(s->vc, s->buf, s->packet_len);
                s->index = 0;
                s->state = 0;
            }
            break;
        }
    }
}

static void net_socket_send_dgram(void *opaque)
{
    NetSocketState *s = opaque;
    int size;

    size = recv(s->fd, s->buf, sizeof(s->buf), 0);
    if (size < 0)
        return;
    if (size == 0) {
        /* end of connection */
        qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
        return;
    }
    qemu_send_packet(s->vc, s->buf, size);
}

static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
{
    struct ip_mreq imr;
    int fd;
    int val, ret;
    if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
	fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
		inet_ntoa(mcastaddr->sin_addr),
                (int)ntohl(mcastaddr->sin_addr.s_addr));
	return -1;

    }
    fd = socket(PF_INET, SOCK_DGRAM, 0);
    if (fd < 0) {
        perror("socket(PF_INET, SOCK_DGRAM)");
        return -1;
    }

    val = 1;
    ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
                   (const char *)&val, sizeof(val));
    if (ret < 0) {
	perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
	goto fail;
    }

    ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
    if (ret < 0) {
        perror("bind");
        goto fail;
    }

    /* Add host to multicast group */
    imr.imr_multiaddr = mcastaddr->sin_addr;
    imr.imr_interface.s_addr = htonl(INADDR_ANY);

    ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
                     (const char *)&imr, sizeof(struct ip_mreq));
    if (ret < 0) {
	perror("setsockopt(IP_ADD_MEMBERSHIP)");
	goto fail;
    }

    /* Force mcast msgs to loopback (eg. several QEMUs in same host */
    val = 1;
    ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
                   (const char *)&val, sizeof(val));
    if (ret < 0) {
	perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
	goto fail;
    }

    socket_set_nonblock(fd);
    return fd;
fail:
    if (fd >= 0)
        closesocket(fd);
    return -1;
}

1339 1340 1341 1342 1343 1344 1345 1346
static void net_socket_cleanup(VLANClientState *vc)
{
    NetSocketState *s = vc->opaque;
    qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
    close(s->fd);
    qemu_free(s);
}

1347 1348 1349
static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
                                                const char *model,
                                                const char *name,
1350
                                                int fd, int is_connected)
1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390
{
    struct sockaddr_in saddr;
    int newfd;
    socklen_t saddr_len;
    NetSocketState *s;

    /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
     * Because this may be "shared" socket from a "master" process, datagrams would be recv()
     * by ONLY ONE process: we must "clone" this dgram socket --jjo
     */

    if (is_connected) {
	if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
	    /* must be bound */
	    if (saddr.sin_addr.s_addr==0) {
		fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
			fd);
		return NULL;
	    }
	    /* clone dgram socket */
	    newfd = net_socket_mcast_create(&saddr);
	    if (newfd < 0) {
		/* error already reported by net_socket_mcast_create() */
		close(fd);
		return NULL;
	    }
	    /* clone newfd to fd, close newfd */
	    dup2(newfd, fd);
	    close(newfd);

	} else {
	    fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
		    fd, strerror(errno));
	    return NULL;
	}
    }

    s = qemu_mallocz(sizeof(NetSocketState));
    s->fd = fd;

1391 1392
    s->vc = qemu_new_vlan_client(vlan, model, name, net_socket_receive_dgram,
                                 NULL, net_socket_cleanup, s);
1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410
    qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);

    /* mcast: save bound address as dst */
    if (is_connected) s->dgram_dst=saddr;

    snprintf(s->vc->info_str, sizeof(s->vc->info_str),
	    "socket: fd=%d (%s mcast=%s:%d)",
	    fd, is_connected? "cloned" : "",
	    inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
    return s;
}

static void net_socket_connect(void *opaque)
{
    NetSocketState *s = opaque;
    qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
}

1411 1412 1413
static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
                                                 const char *model,
                                                 const char *name,
1414
                                                 int fd, int is_connected)
1415 1416 1417 1418
{
    NetSocketState *s;
    s = qemu_mallocz(sizeof(NetSocketState));
    s->fd = fd;
1419 1420
    s->vc = qemu_new_vlan_client(vlan, model, name, net_socket_receive,
                                 NULL, net_socket_cleanup, s);
1421 1422 1423 1424 1425 1426 1427 1428 1429 1430
    snprintf(s->vc->info_str, sizeof(s->vc->info_str),
             "socket: fd=%d", fd);
    if (is_connected) {
        net_socket_connect(s);
    } else {
        qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
    }
    return s;
}

1431 1432
static NetSocketState *net_socket_fd_init(VLANState *vlan,
                                          const char *model, const char *name,
1433
                                          int fd, int is_connected)
1434 1435 1436 1437 1438 1439 1440 1441 1442 1443
{
    int so_type=-1, optlen=sizeof(so_type);

    if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
        (socklen_t *)&optlen)< 0) {
	fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
	return NULL;
    }
    switch(so_type) {
    case SOCK_DGRAM:
1444
        return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1445
    case SOCK_STREAM:
1446
        return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1447 1448 1449
    default:
        /* who knows ... this could be a eg. a pty, do warn and continue as stream */
        fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1450
        return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471
    }
    return NULL;
}

static void net_socket_accept(void *opaque)
{
    NetSocketListenState *s = opaque;
    NetSocketState *s1;
    struct sockaddr_in saddr;
    socklen_t len;
    int fd;

    for(;;) {
        len = sizeof(saddr);
        fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
        if (fd < 0 && errno != EINTR) {
            return;
        } else if (fd >= 0) {
            break;
        }
    }
1472
    s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
1473 1474 1475 1476 1477 1478 1479 1480 1481
    if (!s1) {
        closesocket(fd);
    } else {
        snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
                 "socket: connection from %s:%d",
                 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
    }
}

1482 1483 1484
static int net_socket_listen_init(VLANState *vlan,
                                  const char *model,
                                  const char *name,
1485
                                  const char *host_str)
1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517
{
    NetSocketListenState *s;
    int fd, val, ret;
    struct sockaddr_in saddr;

    if (parse_host_port(&saddr, host_str) < 0)
        return -1;

    s = qemu_mallocz(sizeof(NetSocketListenState));

    fd = socket(PF_INET, SOCK_STREAM, 0);
    if (fd < 0) {
        perror("socket");
        return -1;
    }
    socket_set_nonblock(fd);

    /* allow fast reuse */
    val = 1;
    setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));

    ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
    if (ret < 0) {
        perror("bind");
        return -1;
    }
    ret = listen(fd, 0);
    if (ret < 0) {
        perror("listen");
        return -1;
    }
    s->vlan = vlan;
1518
    s->model = strdup(model);
1519
    s->name = name ? strdup(name) : NULL;
1520 1521 1522 1523 1524
    s->fd = fd;
    qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
    return 0;
}

1525 1526 1527
static int net_socket_connect_init(VLANState *vlan,
                                   const char *model,
                                   const char *name,
1528
                                   const char *host_str)
1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565
{
    NetSocketState *s;
    int fd, connected, ret, err;
    struct sockaddr_in saddr;

    if (parse_host_port(&saddr, host_str) < 0)
        return -1;

    fd = socket(PF_INET, SOCK_STREAM, 0);
    if (fd < 0) {
        perror("socket");
        return -1;
    }
    socket_set_nonblock(fd);

    connected = 0;
    for(;;) {
        ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
        if (ret < 0) {
            err = socket_error();
            if (err == EINTR || err == EWOULDBLOCK) {
            } else if (err == EINPROGRESS) {
                break;
#ifdef _WIN32
            } else if (err == WSAEALREADY) {
                break;
#endif
            } else {
                perror("connect");
                closesocket(fd);
                return -1;
            }
        } else {
            connected = 1;
            break;
        }
    }
1566
    s = net_socket_fd_init(vlan, model, name, fd, connected);
1567 1568 1569 1570 1571 1572 1573 1574
    if (!s)
        return -1;
    snprintf(s->vc->info_str, sizeof(s->vc->info_str),
             "socket: connect to %s:%d",
             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
    return 0;
}

1575 1576 1577
static int net_socket_mcast_init(VLANState *vlan,
                                 const char *model,
                                 const char *name,
1578
                                 const char *host_str)
1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591
{
    NetSocketState *s;
    int fd;
    struct sockaddr_in saddr;

    if (parse_host_port(&saddr, host_str) < 0)
        return -1;


    fd = net_socket_mcast_create(&saddr);
    if (fd < 0)
	return -1;

1592
    s = net_socket_fd_init(vlan, model, name, fd, 0);
1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604
    if (!s)
        return -1;

    s->dgram_dst = saddr;

    snprintf(s->vc->info_str, sizeof(s->vc->info_str),
             "socket: mcast=%s:%d",
             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
    return 0;

}

1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704
typedef struct DumpState {
    VLANClientState *pcap_vc;
    int fd;
    int pcap_caplen;
} DumpState;

#define PCAP_MAGIC 0xa1b2c3d4

struct pcap_file_hdr {
    uint32_t magic;
    uint16_t version_major;
    uint16_t version_minor;
    int32_t thiszone;
    uint32_t sigfigs;
    uint32_t snaplen;
    uint32_t linktype;
};

struct pcap_sf_pkthdr {
    struct {
        int32_t tv_sec;
        int32_t tv_usec;
    } ts;
    uint32_t caplen;
    uint32_t len;
};

static void dump_receive(void *opaque, const uint8_t *buf, int size)
{
    DumpState *s = opaque;
    struct pcap_sf_pkthdr hdr;
    int64_t ts;
    int caplen;

    /* Early return in case of previous error. */
    if (s->fd < 0) {
        return;
    }

    ts = muldiv64 (qemu_get_clock(vm_clock),1000000, ticks_per_sec);
    caplen = size > s->pcap_caplen ? s->pcap_caplen : size;

    hdr.ts.tv_sec = ts / 1000000000LL;
    hdr.ts.tv_usec = ts % 1000000;
    hdr.caplen = caplen;
    hdr.len = size;
    if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
        write(s->fd, buf, caplen) != caplen) {
        qemu_log("-net dump write error - stop dump\n");
        close(s->fd);
        s->fd = -1;
    }
}

static void net_dump_cleanup(VLANClientState *vc)
{
    DumpState *s = vc->opaque;

    close(s->fd);
    qemu_free(s);
}

static int net_dump_init(VLANState *vlan, const char *device,
                         const char *name, const char *filename, int len)
{
    struct pcap_file_hdr hdr;
    DumpState *s;

    s = qemu_malloc(sizeof(DumpState));

    s->fd = open(filename, O_CREAT | O_WRONLY, 0644);
    if (s->fd < 0) {
        fprintf(stderr, "-net dump: can't open %s\n", filename);
        return -1;
    }

    s->pcap_caplen = len;

    hdr.magic = PCAP_MAGIC;
    hdr.version_major = 2;
    hdr.version_minor = 4;
    hdr.thiszone = 0;
    hdr.sigfigs = 0;
    hdr.snaplen = s->pcap_caplen;
    hdr.linktype = 1;

    if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
        perror("-net dump write error");
        close(s->fd);
        qemu_free(s);
        return -1;
    }

    s->pcap_vc = qemu_new_vlan_client(vlan, device, name, dump_receive, NULL,
                                      net_dump_cleanup, s);
    snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
             "dump to %s (len=%d)", filename, len);
    return 0;
}

1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722
/* find or alloc a new VLAN */
VLANState *qemu_find_vlan(int id)
{
    VLANState **pvlan, *vlan;
    for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
        if (vlan->id == id)
            return vlan;
    }
    vlan = qemu_mallocz(sizeof(VLANState));
    vlan->id = id;
    vlan->next = NULL;
    pvlan = &first_vlan;
    while (*pvlan != NULL)
        pvlan = &(*pvlan)->next;
    *pvlan = vlan;
    return vlan;
}

1723 1724 1725 1726 1727 1728 1729 1730 1731 1732
static int nic_get_free_idx(void)
{
    int index;

    for (index = 0; index < MAX_NICS; index++)
        if (!nd_table[index].used)
            return index;
    return -1;
}

1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766
void qemu_check_nic_model(NICInfo *nd, const char *model)
{
    const char *models[2];

    models[0] = model;
    models[1] = NULL;

    qemu_check_nic_model_list(nd, models, model);
}

void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
                               const char *default_model)
{
    int i, exit_status = 0;

    if (!nd->model)
        nd->model = strdup(default_model);

    if (strcmp(nd->model, "?") != 0) {
        for (i = 0 ; models[i]; i++)
            if (strcmp(nd->model, models[i]) == 0)
                return;

        fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
        exit_status = 1;
    }

    fprintf(stderr, "qemu: Supported NIC models: ");
    for (i = 0 ; models[i]; i++)
        fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');

    exit(exit_status);
}

1767 1768
int net_client_init(const char *device, const char *p)
{
1769 1770 1771
    static const char * const fd_params[] = {
        "vlan", "name", "fd", NULL
    };
1772 1773 1774
    char buf[1024];
    int vlan_id, ret;
    VLANState *vlan;
1775
    char *name = NULL;
1776 1777 1778 1779 1780 1781

    vlan_id = 0;
    if (get_param_value(buf, sizeof(buf), "vlan", p)) {
        vlan_id = strtol(buf, NULL, 0);
    }
    vlan = qemu_find_vlan(vlan_id);
1782

1783 1784 1785
    if (get_param_value(buf, sizeof(buf), "name", p)) {
        name = strdup(buf);
    }
1786
    if (!strcmp(device, "nic")) {
1787 1788 1789
        static const char * const nic_params[] = {
            "vlan", "name", "macaddr", "model", NULL
        };
1790 1791
        NICInfo *nd;
        uint8_t *macaddr;
1792
        int idx = nic_get_free_idx();
1793

1794 1795 1796 1797 1798
        if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
            fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
                    buf, p);
            return -1;
        }
1799
        if (idx == -1 || nb_nics >= MAX_NICS) {
1800
            fprintf(stderr, "Too Many NICs\n");
1801 1802
            ret = -1;
            goto out;
1803
        }
1804
        nd = &nd_table[idx];
1805 1806 1807 1808 1809 1810
        macaddr = nd->macaddr;
        macaddr[0] = 0x52;
        macaddr[1] = 0x54;
        macaddr[2] = 0x00;
        macaddr[3] = 0x12;
        macaddr[4] = 0x34;
1811
        macaddr[5] = 0x56 + idx;
1812 1813 1814 1815

        if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
            if (parse_macaddr(macaddr, buf) < 0) {
                fprintf(stderr, "invalid syntax for ethernet address\n");
1816 1817
                ret = -1;
                goto out;
1818 1819 1820 1821 1822 1823
            }
        }
        if (get_param_value(buf, sizeof(buf), "model", p)) {
            nd->model = strdup(buf);
        }
        nd->vlan = vlan;
1824
        nd->name = name;
1825
        nd->used = 1;
1826
        name = NULL;
1827 1828
        nb_nics++;
        vlan->nb_guest_devs++;
1829
        ret = idx;
1830 1831
    } else
    if (!strcmp(device, "none")) {
1832 1833 1834 1835
        if (*p != '\0') {
            fprintf(stderr, "qemu: 'none' takes no parameters\n");
            return -1;
        }
1836 1837 1838 1839 1840 1841
        /* does nothing. It is needed to signal that no network cards
           are wanted */
        ret = 0;
    } else
#ifdef CONFIG_SLIRP
    if (!strcmp(device, "user")) {
1842 1843 1844 1845 1846 1847 1848 1849
        static const char * const slirp_params[] = {
            "vlan", "name", "hostname", "restrict", "ip", NULL
        };
        if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
            fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
                    buf, p);
            return -1;
        }
1850 1851 1852
        if (get_param_value(buf, sizeof(buf), "hostname", p)) {
            pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
        }
1853 1854 1855 1856 1857 1858
        if (get_param_value(buf, sizeof(buf), "restrict", p)) {
            slirp_restrict = (buf[0] == 'y') ? 1 : 0;
        }
        if (get_param_value(buf, sizeof(buf), "ip", p)) {
            slirp_ip = strdup(buf);
        }
1859
        vlan->nb_host_devs++;
1860
        ret = net_slirp_init(vlan, device, name);
1861 1862 1863 1864 1865 1866 1867 1868
    } else if (!strcmp(device, "channel")) {
        long port;
        char name[20], *devname;
        struct VMChannel *vmc;

        port = strtol(p, &devname, 10);
        devname++;
        if (port < 1 || port > 65535) {
1869 1870 1871
            fprintf(stderr, "vmchannel wrong port number\n");
            ret = -1;
            goto out;
1872 1873 1874 1875 1876 1877 1878
        }
        vmc = malloc(sizeof(struct VMChannel));
        snprintf(name, 20, "vmchannel%ld", port);
        vmc->hd = qemu_chr_open(name, devname, NULL);
        if (!vmc->hd) {
            fprintf(stderr, "qemu: could not open vmchannel device"
                    "'%s'\n", devname);
1879 1880
            ret = -1;
            goto out;
1881 1882 1883 1884 1885 1886
        }
        vmc->port = port;
        slirp_add_exec(3, vmc->hd, 4, port);
        qemu_chr_add_handlers(vmc->hd, vmchannel_can_read, vmchannel_read,
                NULL, vmc);
        ret = 0;
1887 1888 1889 1890
    } else
#endif
#ifdef _WIN32
    if (!strcmp(device, "tap")) {
1891 1892 1893
        static const char * const tap_params[] = {
            "vlan", "name", "ifname", NULL
        };
1894
        char ifname[64];
1895 1896 1897 1898 1899 1900

        if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
            fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
                    buf, p);
            return -1;
        }
1901 1902
        if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
            fprintf(stderr, "tap: no interface name\n");
1903 1904
            ret = -1;
            goto out;
1905 1906
        }
        vlan->nb_host_devs++;
1907
        ret = tap_win32_init(vlan, device, name, ifname);
1908
    } else
M
malc 已提交
1909
#elif defined (_AIX)
1910 1911 1912 1913 1914 1915 1916
#else
    if (!strcmp(device, "tap")) {
        char ifname[64];
        char setup_script[1024], down_script[1024];
        int fd;
        vlan->nb_host_devs++;
        if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1917 1918 1919 1920 1921
            if (check_params(buf, sizeof(buf), fd_params, p) < 0) {
                fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
                        buf, p);
                return -1;
            }
1922 1923
            fd = strtol(buf, NULL, 0);
            fcntl(fd, F_SETFL, O_NONBLOCK);
1924 1925
            net_tap_fd_init(vlan, device, name, fd);
            ret = 0;
1926
        } else {
1927 1928 1929 1930 1931 1932 1933 1934
            static const char * const tap_params[] = {
                "vlan", "name", "ifname", "script", "downscript", NULL
            };
            if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
                fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
                        buf, p);
                return -1;
            }
1935 1936 1937 1938 1939 1940 1941 1942 1943
            if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
                ifname[0] = '\0';
            }
            if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
                pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
            }
            if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
                pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
            }
1944
            ret = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
1945 1946 1947 1948 1949 1950
        }
    } else
#endif
    if (!strcmp(device, "socket")) {
        if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
            int fd;
1951 1952 1953 1954 1955
            if (check_params(buf, sizeof(buf), fd_params, p) < 0) {
                fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
                        buf, p);
                return -1;
            }
1956 1957
            fd = strtol(buf, NULL, 0);
            ret = -1;
1958
            if (net_socket_fd_init(vlan, device, name, fd, 1))
1959 1960
                ret = 0;
        } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
1961 1962 1963 1964 1965 1966 1967 1968
            static const char * const listen_params[] = {
                "vlan", "name", "listen", NULL
            };
            if (check_params(buf, sizeof(buf), listen_params, p) < 0) {
                fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
                        buf, p);
                return -1;
            }
1969
            ret = net_socket_listen_init(vlan, device, name, buf);
1970
        } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
1971 1972 1973 1974 1975 1976 1977 1978
            static const char * const connect_params[] = {
                "vlan", "name", "connect", NULL
            };
            if (check_params(buf, sizeof(buf), connect_params, p) < 0) {
                fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
                        buf, p);
                return -1;
            }
1979
            ret = net_socket_connect_init(vlan, device, name, buf);
1980
        } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
1981 1982 1983 1984 1985 1986 1987 1988
            static const char * const mcast_params[] = {
                "vlan", "name", "mcast", NULL
            };
            if (check_params(buf, sizeof(buf), mcast_params, p) < 0) {
                fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
                        buf, p);
                return -1;
            }
1989
            ret = net_socket_mcast_init(vlan, device, name, buf);
1990 1991
        } else {
            fprintf(stderr, "Unknown socket options: %s\n", p);
1992 1993
            ret = -1;
            goto out;
1994 1995 1996 1997 1998
        }
        vlan->nb_host_devs++;
    } else
#ifdef CONFIG_VDE
    if (!strcmp(device, "vde")) {
1999 2000 2001
        static const char * const vde_params[] = {
            "vlan", "name", "sock", "port", "group", "mode", NULL
        };
2002 2003
        char vde_sock[1024], vde_group[512];
	int vde_port, vde_mode;
2004 2005 2006 2007 2008 2009

        if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
            fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
                    buf, p);
            return -1;
        }
2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026
        vlan->nb_host_devs++;
        if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
	    vde_sock[0] = '\0';
	}
	if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
	    vde_port = strtol(buf, NULL, 10);
	} else {
	    vde_port = 0;
	}
	if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
	    vde_group[0] = '\0';
	}
	if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
	    vde_mode = strtol(buf, NULL, 8);
	} else {
	    vde_mode = 0700;
	}
2027
	ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2028 2029
    } else
#endif
2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040
    if (!strcmp(device, "dump")) {
        int len = 65536;

        if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
            len = strtol(buf, NULL, 0);
        }
        if (!get_param_value(buf, sizeof(buf), "file", p)) {
            snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
        }
        ret = net_dump_init(vlan, device, name, buf, len);
    } else {
2041
        fprintf(stderr, "Unknown network device: %s\n", device);
2042 2043
        ret = -1;
        goto out;
2044 2045 2046 2047
    }
    if (ret < 0) {
        fprintf(stderr, "Could not initialize device '%s'\n", device);
    }
2048
out:
2049 2050
    if (name)
        free(name);
2051 2052 2053
    return ret;
}

2054 2055 2056 2057 2058 2059 2060 2061
void net_client_uninit(NICInfo *nd)
{
    nd->vlan->nb_guest_devs--;
    nb_nics--;
    nd->used = 0;
    free((void *)nd->model);
}

2062 2063 2064
static int net_host_check_device(const char *device)
{
    int i;
2065
    const char *valid_param_list[] = { "tap", "socket", "dump"
2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081
#ifdef CONFIG_SLIRP
                                       ,"user"
#endif
#ifdef CONFIG_VDE
                                       ,"vde"
#endif
    };
    for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
        if (!strncmp(valid_param_list[i], device,
                     strlen(valid_param_list[i])))
            return 1;
    }

    return 0;
}

A
aliguori 已提交
2082
void net_host_device_add(Monitor *mon, const char *device, const char *opts)
2083 2084
{
    if (!net_host_check_device(device)) {
A
aliguori 已提交
2085
        monitor_printf(mon, "invalid host network device %s\n", device);
2086 2087
        return;
    }
2088 2089 2090
    if (net_client_init(device, opts ? : "") < 0) {
        monitor_printf(mon, "adding host network device %s failed\n", device);
    }
2091 2092
}

A
aliguori 已提交
2093
void net_host_device_remove(Monitor *mon, int vlan_id, const char *device)
2094 2095 2096 2097 2098 2099
{
    VLANState *vlan;
    VLANClientState *vc;

    vlan = qemu_find_vlan(vlan_id);

2100 2101
    for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
        if (!strcmp(vc->name, device)) {
2102
            break;
2103 2104
        }
    }
2105 2106

    if (!vc) {
A
aliguori 已提交
2107
        monitor_printf(mon, "can't find device %s\n", device);
2108 2109
        return;
    }
2110 2111 2112 2113
    if (!net_host_check_device(vc->model)) {
        monitor_printf(mon, "invalid host network device %s\n", device);
        return;
    }
2114 2115 2116
    qemu_del_vlan_client(vc);
}

2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136
int net_client_parse(const char *str)
{
    const char *p;
    char *q;
    char device[64];

    p = str;
    q = device;
    while (*p != '\0' && *p != ',') {
        if ((q - device) < sizeof(device) - 1)
            *q++ = *p;
        p++;
    }
    *q = '\0';
    if (*p == ',')
        p++;

    return net_client_init(device, p);
}

A
aliguori 已提交
2137
void do_info_network(Monitor *mon)
2138 2139 2140 2141 2142
{
    VLANState *vlan;
    VLANClientState *vc;

    for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
A
aliguori 已提交
2143
        monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2144
        for(vc = vlan->first_client; vc != NULL; vc = vc->next)
A
aliguori 已提交
2145
            monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
2146 2147 2148
    }
}

A
aliguori 已提交
2149
int do_set_link(Monitor *mon, const char *name, const char *up_or_down)
2150 2151 2152 2153 2154 2155 2156
{
    VLANState *vlan;
    VLANClientState *vc = NULL;

    for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
        for (vc = vlan->first_client; vc != NULL; vc = vc->next)
            if (strcmp(vc->name, name) == 0)
2157 2158
                goto done;
done:
2159 2160

    if (!vc) {
A
aliguori 已提交
2161
        monitor_printf(mon, "could not find network device '%s'", name);
2162 2163 2164 2165 2166 2167 2168 2169
        return 0;
    }

    if (strcmp(up_or_down, "up") == 0)
        vc->link_down = 0;
    else if (strcmp(up_or_down, "down") == 0)
        vc->link_down = 1;
    else
A
aliguori 已提交
2170 2171
        monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
                       "valid\n", up_or_down);
2172

2173 2174 2175
    if (vc->link_status_changed)
        vc->link_status_changed(vc);

2176 2177 2178
    return 1;
}

2179 2180 2181 2182 2183 2184
void net_cleanup(void)
{
    VLANState *vlan;

    /* close network clients */
    for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2185
        VLANClientState *vc = vlan->first_client;
2186

2187 2188
        while (vc) {
            VLANClientState *next = vc->next;
2189

2190 2191 2192
            qemu_del_vlan_client(vc);

            vc = next;
2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211
        }
    }
}

void net_client_check(void)
{
    VLANState *vlan;

    for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
        if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
            continue;
        if (vlan->nb_guest_devs == 0)
            fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
        if (vlan->nb_host_devs == 0)
            fprintf(stderr,
                    "Warning: vlan %d is not connected to host network\n",
                    vlan->id);
    }
}