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/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "config-host.h" |
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#include "net.h" |
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#include "net/clients.h" |
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#include "net/hub.h" |
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#include "net/slirp.h" |
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#include "net/util.h" |
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|
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#include "monitor.h" |
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#include "qemu-common.h" |
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#include "qemu_socket.h" |
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#include "qemu-config.h" |
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#include "qmp-commands.h" |
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#include "hw/qdev.h" |
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#include "iov.h" |
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#include "qapi-visit.h" |
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#include "qapi/opts-visitor.h" |
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#include "qapi/qapi-dealloc-visitor.h" |
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/* Net bridge is currently not supported for W32. */
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#if !defined(_WIN32)
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# define CONFIG_NET_BRIDGE
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#endif
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static QTAILQ_HEAD(, NetClientState) net_clients;
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int default_net = 1; |
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|
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/***********************************************************/
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/* network device redirectors */
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|
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#if defined(DEBUG_NET)
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static void hex_dump(FILE *f, const uint8_t *buf, int size) |
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{ |
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int len, i, j, c;
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|
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for(i=0;i<size;i+=16) { |
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len = size - i; |
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if (len > 16) |
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len = 16;
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fprintf(f, "%08x ", i);
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for(j=0;j<16;j++) { |
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if (j < len)
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fprintf(f, " %02x", buf[i+j]);
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else
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fprintf(f, " ");
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} |
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fprintf(f, " ");
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for(j=0;j<len;j++) { |
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c = buf[i+j]; |
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if (c < ' ' || c > '~') |
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c = '.';
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fprintf(f, "%c", c);
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} |
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fprintf(f, "\n");
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} |
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} |
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#endif
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|
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static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) |
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{ |
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const char *p, *p1; |
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int len;
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p = *pp; |
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p1 = strchr(p, sep); |
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if (!p1)
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return -1; |
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len = p1 - p; |
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p1++; |
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if (buf_size > 0) { |
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if (len > buf_size - 1) |
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len = buf_size - 1;
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memcpy(buf, p, len); |
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buf[len] = '\0';
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} |
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*pp = p1; |
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return 0; |
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} |
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|
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int parse_host_port(struct sockaddr_in *saddr, const char *str) |
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{ |
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char buf[512]; |
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struct hostent *he;
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const char *p, *r; |
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int port;
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|
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p = str; |
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if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) |
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return -1; |
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saddr->sin_family = AF_INET; |
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if (buf[0] == '\0') { |
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saddr->sin_addr.s_addr = 0;
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} else {
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if (qemu_isdigit(buf[0])) { |
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if (!inet_aton(buf, &saddr->sin_addr))
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return -1; |
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} else {
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if ((he = gethostbyname(buf)) == NULL) |
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return - 1; |
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saddr->sin_addr = *(struct in_addr *)he->h_addr;
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} |
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} |
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port = strtol(p, (char **)&r, 0); |
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if (r == p)
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return -1; |
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saddr->sin_port = htons(port); |
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return 0; |
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} |
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void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]) |
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{ |
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snprintf(nc->info_str, sizeof(nc->info_str),
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"model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
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nc->model, |
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macaddr[0], macaddr[1], macaddr[2], |
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macaddr[3], macaddr[4], macaddr[5]); |
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} |
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|
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void qemu_macaddr_default_if_unset(MACAddr *macaddr)
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{ |
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static int index = 0; |
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static const MACAddr zero = { .a = { 0,0,0,0,0,0 } }; |
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if (memcmp(macaddr, &zero, sizeof(zero)) != 0) |
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return;
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macaddr->a[0] = 0x52; |
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macaddr->a[1] = 0x54; |
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macaddr->a[2] = 0x00; |
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macaddr->a[3] = 0x12; |
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macaddr->a[4] = 0x34; |
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macaddr->a[5] = 0x56 + index++; |
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} |
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/**
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* Generate a name for net client
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*
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* Only net clients created with the legacy -net option need this. Naming is
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* mandatory for net clients created with -netdev.
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*/
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static char *assign_name(NetClientState *nc1, const char *model) |
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{ |
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NetClientState *nc; |
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char buf[256]; |
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int id = 0; |
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QTAILQ_FOREACH(nc, &net_clients, next) { |
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if (nc == nc1) {
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continue;
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} |
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/* For compatibility only bump id for net clients on a vlan */
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if (strcmp(nc->model, model) == 0 && |
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net_hub_id_for_client(nc, NULL) == 0) { |
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id++; |
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} |
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} |
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snprintf(buf, sizeof(buf), "%s.%d", model, id); |
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return g_strdup(buf);
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} |
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NetClientState *qemu_new_net_client(NetClientInfo *info, |
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NetClientState *peer, |
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const char *model, |
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const char *name) |
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{ |
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NetClientState *nc; |
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assert(info->size >= sizeof(NetClientState));
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nc = g_malloc0(info->size); |
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nc->info = info; |
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nc->model = g_strdup(model); |
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if (name) {
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nc->name = g_strdup(name); |
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} else {
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nc->name = assign_name(nc, model); |
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} |
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if (peer) {
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assert(!peer->peer); |
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nc->peer = peer; |
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peer->peer = nc; |
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} |
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QTAILQ_INSERT_TAIL(&net_clients, nc, next); |
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nc->send_queue = qemu_new_net_queue(nc); |
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return nc;
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} |
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NICState *qemu_new_nic(NetClientInfo *info, |
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NICConf *conf, |
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const char *model, |
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const char *name, |
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void *opaque)
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{ |
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NetClientState *nc; |
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NICState *nic; |
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assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC); |
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assert(info->size >= sizeof(NICState));
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nc = qemu_new_net_client(info, conf->peer, model, name); |
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nic = DO_UPCAST(NICState, nc, nc); |
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nic->conf = conf; |
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nic->opaque = opaque; |
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return nic;
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} |
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static void qemu_cleanup_net_client(NetClientState *nc) |
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{ |
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QTAILQ_REMOVE(&net_clients, nc, next); |
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if (nc->info->cleanup) {
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nc->info->cleanup(nc); |
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} |
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} |
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static void qemu_free_net_client(NetClientState *nc) |
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{ |
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if (nc->send_queue) {
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qemu_del_net_queue(nc->send_queue); |
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} |
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if (nc->peer) {
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nc->peer->peer = NULL;
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} |
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g_free(nc->name); |
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g_free(nc->model); |
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g_free(nc); |
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} |
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void qemu_del_net_client(NetClientState *nc)
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{ |
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/* If there is a peer NIC, delete and cleanup client, but do not free. */
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if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
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NICState *nic = DO_UPCAST(NICState, nc, nc->peer); |
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if (nic->peer_deleted) {
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return;
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} |
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nic->peer_deleted = true;
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/* Let NIC know peer is gone. */
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nc->peer->link_down = true;
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if (nc->peer->info->link_status_changed) {
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nc->peer->info->link_status_changed(nc->peer); |
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} |
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qemu_cleanup_net_client(nc); |
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return;
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} |
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/* If this is a peer NIC and peer has already been deleted, free it now. */
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if (nc->peer && nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
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NICState *nic = DO_UPCAST(NICState, nc, nc); |
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if (nic->peer_deleted) {
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qemu_free_net_client(nc->peer); |
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} |
283 |
} |
284 |
|
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qemu_cleanup_net_client(nc); |
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qemu_free_net_client(nc); |
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} |
288 |
|
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void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) |
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{ |
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NetClientState *nc; |
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|
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QTAILQ_FOREACH(nc, &net_clients, next) { |
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if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
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func(DO_UPCAST(NICState, nc, nc), opaque); |
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} |
297 |
} |
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} |
299 |
|
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int qemu_can_send_packet(NetClientState *sender)
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{ |
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if (!sender->peer) {
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return 1; |
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} |
305 |
|
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if (sender->peer->receive_disabled) {
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return 0; |
308 |
} else if (sender->peer->info->can_receive && |
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!sender->peer->info->can_receive(sender->peer)) { |
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return 0; |
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} |
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return 1; |
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} |
314 |
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ssize_t qemu_deliver_packet(NetClientState *sender, |
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unsigned flags,
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const uint8_t *data,
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size_t size, |
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void *opaque)
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{ |
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NetClientState *nc = opaque; |
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ssize_t ret; |
323 |
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if (nc->link_down) {
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return size;
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} |
327 |
|
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if (nc->receive_disabled) {
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return 0; |
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} |
331 |
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if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) {
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ret = nc->info->receive_raw(nc, data, size); |
334 |
} else {
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ret = nc->info->receive(nc, data, size); |
336 |
} |
337 |
|
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if (ret == 0) { |
339 |
nc->receive_disabled = 1;
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}; |
341 |
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return ret;
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} |
344 |
|
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void qemu_purge_queued_packets(NetClientState *nc)
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{ |
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if (!nc->peer) {
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return;
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} |
350 |
|
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qemu_net_queue_purge(nc->peer->send_queue, nc); |
352 |
} |
353 |
|
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void qemu_flush_queued_packets(NetClientState *nc)
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{ |
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nc->receive_disabled = 0;
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357 |
|
358 |
if (qemu_net_queue_flush(nc->send_queue)) {
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359 |
/* We emptied the queue successfully, signal to the IO thread to repoll
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* the file descriptor (for tap, for example).
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*/
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362 |
qemu_notify_event(); |
363 |
} |
364 |
} |
365 |
|
366 |
static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
|
367 |
unsigned flags,
|
368 |
const uint8_t *buf, int size, |
369 |
NetPacketSent *sent_cb) |
370 |
{ |
371 |
NetQueue *queue; |
372 |
|
373 |
#ifdef DEBUG_NET
|
374 |
printf("qemu_send_packet_async:\n");
|
375 |
hex_dump(stdout, buf, size); |
376 |
#endif
|
377 |
|
378 |
if (sender->link_down || !sender->peer) {
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379 |
return size;
|
380 |
} |
381 |
|
382 |
queue = sender->peer->send_queue; |
383 |
|
384 |
return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
|
385 |
} |
386 |
|
387 |
ssize_t qemu_send_packet_async(NetClientState *sender, |
388 |
const uint8_t *buf, int size, |
389 |
NetPacketSent *sent_cb) |
390 |
{ |
391 |
return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
|
392 |
buf, size, sent_cb); |
393 |
} |
394 |
|
395 |
void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size) |
396 |
{ |
397 |
qemu_send_packet_async(nc, buf, size, NULL);
|
398 |
} |
399 |
|
400 |
ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size) |
401 |
{ |
402 |
return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW,
|
403 |
buf, size, NULL);
|
404 |
} |
405 |
|
406 |
static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov, |
407 |
int iovcnt)
|
408 |
{ |
409 |
uint8_t buffer[4096];
|
410 |
size_t offset; |
411 |
|
412 |
offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer)); |
413 |
|
414 |
return nc->info->receive(nc, buffer, offset);
|
415 |
} |
416 |
|
417 |
ssize_t qemu_deliver_packet_iov(NetClientState *sender, |
418 |
unsigned flags,
|
419 |
const struct iovec *iov, |
420 |
int iovcnt,
|
421 |
void *opaque)
|
422 |
{ |
423 |
NetClientState *nc = opaque; |
424 |
int ret;
|
425 |
|
426 |
if (nc->link_down) {
|
427 |
return iov_size(iov, iovcnt);
|
428 |
} |
429 |
|
430 |
if (nc->receive_disabled) {
|
431 |
return 0; |
432 |
} |
433 |
|
434 |
if (nc->info->receive_iov) {
|
435 |
ret = nc->info->receive_iov(nc, iov, iovcnt); |
436 |
} else {
|
437 |
ret = nc_sendv_compat(nc, iov, iovcnt); |
438 |
} |
439 |
|
440 |
if (ret == 0) { |
441 |
nc->receive_disabled = 1;
|
442 |
} |
443 |
|
444 |
return ret;
|
445 |
} |
446 |
|
447 |
ssize_t qemu_sendv_packet_async(NetClientState *sender, |
448 |
const struct iovec *iov, int iovcnt, |
449 |
NetPacketSent *sent_cb) |
450 |
{ |
451 |
NetQueue *queue; |
452 |
|
453 |
if (sender->link_down || !sender->peer) {
|
454 |
return iov_size(iov, iovcnt);
|
455 |
} |
456 |
|
457 |
queue = sender->peer->send_queue; |
458 |
|
459 |
return qemu_net_queue_send_iov(queue, sender,
|
460 |
QEMU_NET_PACKET_FLAG_NONE, |
461 |
iov, iovcnt, sent_cb); |
462 |
} |
463 |
|
464 |
ssize_t |
465 |
qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt) |
466 |
{ |
467 |
return qemu_sendv_packet_async(nc, iov, iovcnt, NULL); |
468 |
} |
469 |
|
470 |
NetClientState *qemu_find_netdev(const char *id) |
471 |
{ |
472 |
NetClientState *nc; |
473 |
|
474 |
QTAILQ_FOREACH(nc, &net_clients, next) { |
475 |
if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC)
|
476 |
continue;
|
477 |
if (!strcmp(nc->name, id)) {
|
478 |
return nc;
|
479 |
} |
480 |
} |
481 |
|
482 |
return NULL; |
483 |
} |
484 |
|
485 |
static int nic_get_free_idx(void) |
486 |
{ |
487 |
int index;
|
488 |
|
489 |
for (index = 0; index < MAX_NICS; index++) |
490 |
if (!nd_table[index].used)
|
491 |
return index;
|
492 |
return -1; |
493 |
} |
494 |
|
495 |
int qemu_show_nic_models(const char *arg, const char *const *models) |
496 |
{ |
497 |
int i;
|
498 |
|
499 |
if (!arg || !is_help_option(arg)) {
|
500 |
return 0; |
501 |
} |
502 |
|
503 |
fprintf(stderr, "qemu: Supported NIC models: ");
|
504 |
for (i = 0 ; models[i]; i++) |
505 |
fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n'); |
506 |
return 1; |
507 |
} |
508 |
|
509 |
void qemu_check_nic_model(NICInfo *nd, const char *model) |
510 |
{ |
511 |
const char *models[2]; |
512 |
|
513 |
models[0] = model;
|
514 |
models[1] = NULL; |
515 |
|
516 |
if (qemu_show_nic_models(nd->model, models))
|
517 |
exit(0);
|
518 |
if (qemu_find_nic_model(nd, models, model) < 0) |
519 |
exit(1);
|
520 |
} |
521 |
|
522 |
int qemu_find_nic_model(NICInfo *nd, const char * const *models, |
523 |
const char *default_model) |
524 |
{ |
525 |
int i;
|
526 |
|
527 |
if (!nd->model)
|
528 |
nd->model = g_strdup(default_model); |
529 |
|
530 |
for (i = 0 ; models[i]; i++) { |
531 |
if (strcmp(nd->model, models[i]) == 0) |
532 |
return i;
|
533 |
} |
534 |
|
535 |
error_report("Unsupported NIC model: %s", nd->model);
|
536 |
return -1; |
537 |
} |
538 |
|
539 |
static int net_init_nic(const NetClientOptions *opts, const char *name, |
540 |
NetClientState *peer) |
541 |
{ |
542 |
int idx;
|
543 |
NICInfo *nd; |
544 |
const NetLegacyNicOptions *nic;
|
545 |
|
546 |
assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC); |
547 |
nic = opts->nic; |
548 |
|
549 |
idx = nic_get_free_idx(); |
550 |
if (idx == -1 || nb_nics >= MAX_NICS) { |
551 |
error_report("Too Many NICs");
|
552 |
return -1; |
553 |
} |
554 |
|
555 |
nd = &nd_table[idx]; |
556 |
|
557 |
memset(nd, 0, sizeof(*nd)); |
558 |
|
559 |
if (nic->has_netdev) {
|
560 |
nd->netdev = qemu_find_netdev(nic->netdev); |
561 |
if (!nd->netdev) {
|
562 |
error_report("netdev '%s' not found", nic->netdev);
|
563 |
return -1; |
564 |
} |
565 |
} else {
|
566 |
assert(peer); |
567 |
nd->netdev = peer; |
568 |
} |
569 |
if (name) {
|
570 |
nd->name = g_strdup(name); |
571 |
} |
572 |
if (nic->has_model) {
|
573 |
nd->model = g_strdup(nic->model); |
574 |
} |
575 |
if (nic->has_addr) {
|
576 |
nd->devaddr = g_strdup(nic->addr); |
577 |
} |
578 |
|
579 |
if (nic->has_macaddr &&
|
580 |
net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) {
|
581 |
error_report("invalid syntax for ethernet address");
|
582 |
return -1; |
583 |
} |
584 |
qemu_macaddr_default_if_unset(&nd->macaddr); |
585 |
|
586 |
if (nic->has_vectors) {
|
587 |
if (nic->vectors > 0x7ffffff) { |
588 |
error_report("invalid # of vectors: %"PRIu32, nic->vectors);
|
589 |
return -1; |
590 |
} |
591 |
nd->nvectors = nic->vectors; |
592 |
} else {
|
593 |
nd->nvectors = DEV_NVECTORS_UNSPECIFIED; |
594 |
} |
595 |
|
596 |
nd->used = 1;
|
597 |
nb_nics++; |
598 |
|
599 |
return idx;
|
600 |
} |
601 |
|
602 |
|
603 |
static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])( |
604 |
const NetClientOptions *opts,
|
605 |
const char *name, |
606 |
NetClientState *peer) = { |
607 |
[NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic, |
608 |
#ifdef CONFIG_SLIRP
|
609 |
[NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp, |
610 |
#endif
|
611 |
[NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap, |
612 |
[NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket, |
613 |
#ifdef CONFIG_VDE
|
614 |
[NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde, |
615 |
#endif
|
616 |
[NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump, |
617 |
#ifdef CONFIG_NET_BRIDGE
|
618 |
[NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge, |
619 |
#endif
|
620 |
[NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport, |
621 |
}; |
622 |
|
623 |
|
624 |
static int net_client_init1(const void *object, int is_netdev, Error **errp) |
625 |
{ |
626 |
union {
|
627 |
const Netdev *netdev;
|
628 |
const NetLegacy *net;
|
629 |
} u; |
630 |
const NetClientOptions *opts;
|
631 |
const char *name; |
632 |
|
633 |
if (is_netdev) {
|
634 |
u.netdev = object; |
635 |
opts = u.netdev->opts; |
636 |
name = u.netdev->id; |
637 |
|
638 |
switch (opts->kind) {
|
639 |
#ifdef CONFIG_SLIRP
|
640 |
case NET_CLIENT_OPTIONS_KIND_USER:
|
641 |
#endif
|
642 |
case NET_CLIENT_OPTIONS_KIND_TAP:
|
643 |
case NET_CLIENT_OPTIONS_KIND_SOCKET:
|
644 |
#ifdef CONFIG_VDE
|
645 |
case NET_CLIENT_OPTIONS_KIND_VDE:
|
646 |
#endif
|
647 |
#ifdef CONFIG_NET_BRIDGE
|
648 |
case NET_CLIENT_OPTIONS_KIND_BRIDGE:
|
649 |
#endif
|
650 |
case NET_CLIENT_OPTIONS_KIND_HUBPORT:
|
651 |
break;
|
652 |
|
653 |
default:
|
654 |
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type",
|
655 |
"a netdev backend type");
|
656 |
return -1; |
657 |
} |
658 |
} else {
|
659 |
u.net = object; |
660 |
opts = u.net->opts; |
661 |
/* missing optional values have been initialized to "all bits zero" */
|
662 |
name = u.net->has_id ? u.net->id : u.net->name; |
663 |
} |
664 |
|
665 |
if (net_client_init_fun[opts->kind]) {
|
666 |
NetClientState *peer = NULL;
|
667 |
|
668 |
/* Do not add to a vlan if it's a -netdev or a nic with a netdev=
|
669 |
* parameter. */
|
670 |
if (!is_netdev &&
|
671 |
(opts->kind != NET_CLIENT_OPTIONS_KIND_NIC || |
672 |
!opts->nic->has_netdev)) { |
673 |
peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL); |
674 |
} |
675 |
|
676 |
if (net_client_init_fun[opts->kind](opts, name, peer) < 0) { |
677 |
/* TODO push error reporting into init() methods */
|
678 |
error_set(errp, QERR_DEVICE_INIT_FAILED, |
679 |
NetClientOptionsKind_lookup[opts->kind]); |
680 |
return -1; |
681 |
} |
682 |
} |
683 |
return 0; |
684 |
} |
685 |
|
686 |
|
687 |
static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp) |
688 |
{ |
689 |
if (is_netdev) {
|
690 |
visit_type_Netdev(v, (Netdev **)object, NULL, errp);
|
691 |
} else {
|
692 |
visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp);
|
693 |
} |
694 |
} |
695 |
|
696 |
|
697 |
int net_client_init(QemuOpts *opts, int is_netdev, Error **errp) |
698 |
{ |
699 |
void *object = NULL; |
700 |
Error *err = NULL;
|
701 |
int ret = -1; |
702 |
|
703 |
{ |
704 |
OptsVisitor *ov = opts_visitor_new(opts); |
705 |
|
706 |
net_visit(opts_get_visitor(ov), is_netdev, &object, &err); |
707 |
opts_visitor_cleanup(ov); |
708 |
} |
709 |
|
710 |
if (!err) {
|
711 |
ret = net_client_init1(object, is_netdev, &err); |
712 |
} |
713 |
|
714 |
if (object) {
|
715 |
QapiDeallocVisitor *dv = qapi_dealloc_visitor_new(); |
716 |
|
717 |
net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL);
|
718 |
qapi_dealloc_visitor_cleanup(dv); |
719 |
} |
720 |
|
721 |
error_propagate(errp, err); |
722 |
return ret;
|
723 |
} |
724 |
|
725 |
|
726 |
static int net_host_check_device(const char *device) |
727 |
{ |
728 |
int i;
|
729 |
const char *valid_param_list[] = { "tap", "socket", "dump" |
730 |
#ifdef CONFIG_NET_BRIDGE
|
731 |
, "bridge"
|
732 |
#endif
|
733 |
#ifdef CONFIG_SLIRP
|
734 |
,"user"
|
735 |
#endif
|
736 |
#ifdef CONFIG_VDE
|
737 |
,"vde"
|
738 |
#endif
|
739 |
}; |
740 |
for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) { |
741 |
if (!strncmp(valid_param_list[i], device,
|
742 |
strlen(valid_param_list[i]))) |
743 |
return 1; |
744 |
} |
745 |
|
746 |
return 0; |
747 |
} |
748 |
|
749 |
void net_host_device_add(Monitor *mon, const QDict *qdict) |
750 |
{ |
751 |
const char *device = qdict_get_str(qdict, "device"); |
752 |
const char *opts_str = qdict_get_try_str(qdict, "opts"); |
753 |
Error *local_err = NULL;
|
754 |
QemuOpts *opts; |
755 |
|
756 |
if (!net_host_check_device(device)) {
|
757 |
monitor_printf(mon, "invalid host network device %s\n", device);
|
758 |
return;
|
759 |
} |
760 |
|
761 |
opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0); |
762 |
if (!opts) {
|
763 |
return;
|
764 |
} |
765 |
|
766 |
qemu_opt_set(opts, "type", device);
|
767 |
|
768 |
net_client_init(opts, 0, &local_err);
|
769 |
if (error_is_set(&local_err)) {
|
770 |
qerror_report_err(local_err); |
771 |
error_free(local_err); |
772 |
monitor_printf(mon, "adding host network device %s failed\n", device);
|
773 |
} |
774 |
} |
775 |
|
776 |
void net_host_device_remove(Monitor *mon, const QDict *qdict) |
777 |
{ |
778 |
NetClientState *nc; |
779 |
int vlan_id = qdict_get_int(qdict, "vlan_id"); |
780 |
const char *device = qdict_get_str(qdict, "device"); |
781 |
|
782 |
nc = net_hub_find_client_by_name(vlan_id, device); |
783 |
if (!nc) {
|
784 |
return;
|
785 |
} |
786 |
if (!net_host_check_device(nc->model)) {
|
787 |
monitor_printf(mon, "invalid host network device %s\n", device);
|
788 |
return;
|
789 |
} |
790 |
qemu_del_net_client(nc); |
791 |
} |
792 |
|
793 |
void netdev_add(QemuOpts *opts, Error **errp)
|
794 |
{ |
795 |
net_client_init(opts, 1, errp);
|
796 |
} |
797 |
|
798 |
int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret) |
799 |
{ |
800 |
Error *local_err = NULL;
|
801 |
QemuOptsList *opts_list; |
802 |
QemuOpts *opts; |
803 |
|
804 |
opts_list = qemu_find_opts_err("netdev", &local_err);
|
805 |
if (error_is_set(&local_err)) {
|
806 |
goto exit_err;
|
807 |
} |
808 |
|
809 |
opts = qemu_opts_from_qdict(opts_list, qdict, &local_err); |
810 |
if (error_is_set(&local_err)) {
|
811 |
goto exit_err;
|
812 |
} |
813 |
|
814 |
netdev_add(opts, &local_err); |
815 |
if (error_is_set(&local_err)) {
|
816 |
qemu_opts_del(opts); |
817 |
goto exit_err;
|
818 |
} |
819 |
|
820 |
return 0; |
821 |
|
822 |
exit_err:
|
823 |
qerror_report_err(local_err); |
824 |
error_free(local_err); |
825 |
return -1; |
826 |
} |
827 |
|
828 |
void qmp_netdev_del(const char *id, Error **errp) |
829 |
{ |
830 |
NetClientState *nc; |
831 |
QemuOpts *opts; |
832 |
|
833 |
nc = qemu_find_netdev(id); |
834 |
if (!nc) {
|
835 |
error_set(errp, QERR_DEVICE_NOT_FOUND, id); |
836 |
return;
|
837 |
} |
838 |
|
839 |
opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id); |
840 |
if (!opts) {
|
841 |
error_setg(errp, "Device '%s' is not a netdev", id);
|
842 |
return;
|
843 |
} |
844 |
|
845 |
qemu_del_net_client(nc); |
846 |
qemu_opts_del(opts); |
847 |
} |
848 |
|
849 |
void print_net_client(Monitor *mon, NetClientState *nc)
|
850 |
{ |
851 |
monitor_printf(mon, "%s: type=%s,%s\n", nc->name,
|
852 |
NetClientOptionsKind_lookup[nc->info->type], nc->info_str); |
853 |
} |
854 |
|
855 |
void do_info_network(Monitor *mon)
|
856 |
{ |
857 |
NetClientState *nc, *peer; |
858 |
NetClientOptionsKind type; |
859 |
|
860 |
net_hub_info(mon); |
861 |
|
862 |
QTAILQ_FOREACH(nc, &net_clients, next) { |
863 |
peer = nc->peer; |
864 |
type = nc->info->type; |
865 |
|
866 |
/* Skip if already printed in hub info */
|
867 |
if (net_hub_id_for_client(nc, NULL) == 0) { |
868 |
continue;
|
869 |
} |
870 |
|
871 |
if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) {
|
872 |
print_net_client(mon, nc); |
873 |
} /* else it's a netdev connected to a NIC, printed with the NIC */
|
874 |
if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) {
|
875 |
monitor_printf(mon, " \\ ");
|
876 |
print_net_client(mon, peer); |
877 |
} |
878 |
} |
879 |
} |
880 |
|
881 |
void qmp_set_link(const char *name, bool up, Error **errp) |
882 |
{ |
883 |
NetClientState *nc = NULL;
|
884 |
|
885 |
QTAILQ_FOREACH(nc, &net_clients, next) { |
886 |
if (!strcmp(nc->name, name)) {
|
887 |
goto done;
|
888 |
} |
889 |
} |
890 |
done:
|
891 |
if (!nc) {
|
892 |
error_set(errp, QERR_DEVICE_NOT_FOUND, name); |
893 |
return;
|
894 |
} |
895 |
|
896 |
nc->link_down = !up; |
897 |
|
898 |
if (nc->info->link_status_changed) {
|
899 |
nc->info->link_status_changed(nc); |
900 |
} |
901 |
|
902 |
/* Notify peer. Don't update peer link status: this makes it possible to
|
903 |
* disconnect from host network without notifying the guest.
|
904 |
* FIXME: is disconnected link status change operation useful?
|
905 |
*
|
906 |
* Current behaviour is compatible with qemu vlans where there could be
|
907 |
* multiple clients that can still communicate with each other in
|
908 |
* disconnected mode. For now maintain this compatibility. */
|
909 |
if (nc->peer && nc->peer->info->link_status_changed) {
|
910 |
nc->peer->info->link_status_changed(nc->peer); |
911 |
} |
912 |
} |
913 |
|
914 |
void net_cleanup(void) |
915 |
{ |
916 |
NetClientState *nc, *next_vc; |
917 |
|
918 |
QTAILQ_FOREACH_SAFE(nc, &net_clients, next, next_vc) { |
919 |
qemu_del_net_client(nc); |
920 |
} |
921 |
} |
922 |
|
923 |
void net_check_clients(void) |
924 |
{ |
925 |
NetClientState *nc; |
926 |
int i;
|
927 |
|
928 |
/* Don't warn about the default network setup that you get if
|
929 |
* no command line -net or -netdev options are specified. There
|
930 |
* are two cases that we would otherwise complain about:
|
931 |
* (1) board doesn't support a NIC but the implicit "-net nic"
|
932 |
* requested one
|
933 |
* (2) CONFIG_SLIRP not set, in which case the implicit "-net nic"
|
934 |
* sets up a nic that isn't connected to anything.
|
935 |
*/
|
936 |
if (default_net) {
|
937 |
return;
|
938 |
} |
939 |
|
940 |
net_hub_check_clients(); |
941 |
|
942 |
QTAILQ_FOREACH(nc, &net_clients, next) { |
943 |
if (!nc->peer) {
|
944 |
fprintf(stderr, "Warning: %s %s has no peer\n",
|
945 |
nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ? |
946 |
"nic" : "netdev", nc->name); |
947 |
} |
948 |
} |
949 |
|
950 |
/* Check that all NICs requested via -net nic actually got created.
|
951 |
* NICs created via -device don't need to be checked here because
|
952 |
* they are always instantiated.
|
953 |
*/
|
954 |
for (i = 0; i < MAX_NICS; i++) { |
955 |
NICInfo *nd = &nd_table[i]; |
956 |
if (nd->used && !nd->instantiated) {
|
957 |
fprintf(stderr, "Warning: requested NIC (%s, model %s) "
|
958 |
"was not created (not supported by this machine?)\n",
|
959 |
nd->name ? nd->name : "anonymous",
|
960 |
nd->model ? nd->model : "unspecified");
|
961 |
} |
962 |
} |
963 |
} |
964 |
|
965 |
static int net_init_client(QemuOpts *opts, void *dummy) |
966 |
{ |
967 |
Error *local_err = NULL;
|
968 |
|
969 |
net_client_init(opts, 0, &local_err);
|
970 |
if (error_is_set(&local_err)) {
|
971 |
qerror_report_err(local_err); |
972 |
error_free(local_err); |
973 |
return -1; |
974 |
} |
975 |
|
976 |
return 0; |
977 |
} |
978 |
|
979 |
static int net_init_netdev(QemuOpts *opts, void *dummy) |
980 |
{ |
981 |
Error *local_err = NULL;
|
982 |
int ret;
|
983 |
|
984 |
ret = net_client_init(opts, 1, &local_err);
|
985 |
if (error_is_set(&local_err)) {
|
986 |
qerror_report_err(local_err); |
987 |
error_free(local_err); |
988 |
return -1; |
989 |
} |
990 |
|
991 |
return ret;
|
992 |
} |
993 |
|
994 |
int net_init_clients(void) |
995 |
{ |
996 |
QemuOptsList *net = qemu_find_opts("net");
|
997 |
|
998 |
if (default_net) {
|
999 |
/* if no clients, we use a default config */
|
1000 |
qemu_opts_set(net, NULL, "type", "nic"); |
1001 |
#ifdef CONFIG_SLIRP
|
1002 |
qemu_opts_set(net, NULL, "type", "user"); |
1003 |
#endif
|
1004 |
} |
1005 |
|
1006 |
QTAILQ_INIT(&net_clients); |
1007 |
|
1008 |
if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1) |
1009 |
return -1; |
1010 |
|
1011 |
if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) { |
1012 |
return -1; |
1013 |
} |
1014 |
|
1015 |
return 0; |
1016 |
} |
1017 |
|
1018 |
int net_client_parse(QemuOptsList *opts_list, const char *optarg) |
1019 |
{ |
1020 |
#if defined(CONFIG_SLIRP)
|
1021 |
int ret;
|
1022 |
if (net_slirp_parse_legacy(opts_list, optarg, &ret)) {
|
1023 |
return ret;
|
1024 |
} |
1025 |
#endif
|
1026 |
|
1027 |
if (!qemu_opts_parse(opts_list, optarg, 1)) { |
1028 |
return -1; |
1029 |
} |
1030 |
|
1031 |
default_net = 0;
|
1032 |
return 0; |
1033 |
} |
1034 |
|
1035 |
/* From FreeBSD */
|
1036 |
/* XXX: optimize */
|
1037 |
unsigned compute_mcast_idx(const uint8_t *ep) |
1038 |
{ |
1039 |
uint32_t crc; |
1040 |
int carry, i, j;
|
1041 |
uint8_t b; |
1042 |
|
1043 |
crc = 0xffffffff;
|
1044 |
for (i = 0; i < 6; i++) { |
1045 |
b = *ep++; |
1046 |
for (j = 0; j < 8; j++) { |
1047 |
carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); |
1048 |
crc <<= 1;
|
1049 |
b >>= 1;
|
1050 |
if (carry) {
|
1051 |
crc = ((crc ^ POLYNOMIAL) | carry); |
1052 |
} |
1053 |
} |
1054 |
} |
1055 |
return crc >> 26; |
1056 |
} |