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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 "net/slirp.h" |
25 |
|
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#include "config-host.h" |
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|
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#ifndef _WIN32
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#include <pwd.h> |
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#include <sys/wait.h> |
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#endif
|
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#include "net/net.h" |
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#include "clients.h" |
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#include "hub.h" |
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#include "monitor/monitor.h" |
36 |
#include "qemu/sockets.h" |
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#include "slirp/libslirp.h" |
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#include "char/char.h" |
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|
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static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) |
41 |
{ |
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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); |
46 |
if (!p1)
|
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return -1; |
48 |
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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/* slirp network adapter */
|
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|
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#define SLIRP_CFG_HOSTFWD 1 |
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#define SLIRP_CFG_LEGACY 2 |
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|
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struct slirp_config_str {
|
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struct slirp_config_str *next;
|
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int flags;
|
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char str[1024]; |
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int legacy_format;
|
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}; |
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|
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typedef struct SlirpState { |
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NetClientState nc; |
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QTAILQ_ENTRY(SlirpState) entry; |
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Slirp *slirp; |
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#ifndef _WIN32
|
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char smb_dir[128]; |
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#endif
|
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} SlirpState; |
80 |
|
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static struct slirp_config_str *slirp_configs; |
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const char *legacy_tftp_prefix; |
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const char *legacy_bootp_filename; |
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static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
|
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QTAILQ_HEAD_INITIALIZER(slirp_stacks); |
86 |
|
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static int slirp_hostfwd(SlirpState *s, const char *redir_str, |
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int legacy_format);
|
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static int slirp_guestfwd(SlirpState *s, const char *config_str, |
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int legacy_format);
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|
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#ifndef _WIN32
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static const char *legacy_smb_export; |
94 |
|
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static int slirp_smb(SlirpState *s, const char *exported_dir, |
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struct in_addr vserver_addr);
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static void slirp_smb_cleanup(SlirpState *s); |
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#else
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static inline void slirp_smb_cleanup(SlirpState *s) { } |
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#endif
|
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|
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void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len) |
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{ |
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SlirpState *s = opaque; |
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|
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qemu_send_packet(&s->nc, pkt, pkt_len); |
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} |
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|
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static ssize_t net_slirp_receive(NetClientState *nc, const uint8_t *buf, size_t size) |
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{ |
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SlirpState *s = DO_UPCAST(SlirpState, nc, nc); |
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|
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slirp_input(s->slirp, buf, size); |
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return size;
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} |
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|
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static void net_slirp_cleanup(NetClientState *nc) |
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{ |
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SlirpState *s = DO_UPCAST(SlirpState, nc, nc); |
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|
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slirp_cleanup(s->slirp); |
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slirp_smb_cleanup(s); |
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QTAILQ_REMOVE(&slirp_stacks, s, entry); |
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} |
126 |
|
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static NetClientInfo net_slirp_info = {
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.type = NET_CLIENT_OPTIONS_KIND_USER, |
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.size = sizeof(SlirpState),
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.receive = net_slirp_receive, |
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.cleanup = net_slirp_cleanup, |
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}; |
133 |
|
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static int net_slirp_init(NetClientState *peer, const char *model, |
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const char *name, int restricted, |
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const char *vnetwork, const char *vhost, |
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const char *vhostname, const char *tftp_export, |
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const char *bootfile, const char *vdhcp_start, |
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const char *vnameserver, const char *smb_export, |
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const char *vsmbserver, const char **dnssearch) |
141 |
{ |
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/* default settings according to historic slirp */
|
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struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */ |
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struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */ |
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struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */ |
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struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */ |
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struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */ |
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#ifndef _WIN32
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struct in_addr smbsrv = { .s_addr = 0 }; |
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#endif
|
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NetClientState *nc; |
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SlirpState *s; |
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char buf[20]; |
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uint32_t addr; |
155 |
int shift;
|
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char *end;
|
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struct slirp_config_str *config;
|
158 |
|
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if (!tftp_export) {
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tftp_export = legacy_tftp_prefix; |
161 |
} |
162 |
if (!bootfile) {
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bootfile = legacy_bootp_filename; |
164 |
} |
165 |
|
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if (vnetwork) {
|
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if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) { |
168 |
if (!inet_aton(vnetwork, &net)) {
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return -1; |
170 |
} |
171 |
addr = ntohl(net.s_addr); |
172 |
if (!(addr & 0x80000000)) { |
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mask.s_addr = htonl(0xff000000); /* class A */ |
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} else if ((addr & 0xfff00000) == 0xac100000) { |
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mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */ |
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} else if ((addr & 0xc0000000) == 0x80000000) { |
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mask.s_addr = htonl(0xffff0000); /* class B */ |
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} else if ((addr & 0xffff0000) == 0xc0a80000) { |
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mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */ |
180 |
} else if ((addr & 0xffff0000) == 0xc6120000) { |
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mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */ |
182 |
} else if ((addr & 0xe0000000) == 0xe0000000) { |
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mask.s_addr = htonl(0xffffff00); /* class C */ |
184 |
} else {
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mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */ |
186 |
} |
187 |
} else {
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if (!inet_aton(buf, &net)) {
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return -1; |
190 |
} |
191 |
shift = strtol(vnetwork, &end, 10);
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if (*end != '\0') { |
193 |
if (!inet_aton(vnetwork, &mask)) {
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return -1; |
195 |
} |
196 |
} else if (shift < 4 || shift > 32) { |
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return -1; |
198 |
} else {
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mask.s_addr = htonl(0xffffffff << (32 - shift)); |
200 |
} |
201 |
} |
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net.s_addr &= mask.s_addr; |
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host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
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dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
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dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
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} |
207 |
|
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if (vhost && !inet_aton(vhost, &host)) {
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return -1; |
210 |
} |
211 |
if ((host.s_addr & mask.s_addr) != net.s_addr) {
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return -1; |
213 |
} |
214 |
|
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if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
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return -1; |
217 |
} |
218 |
if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
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dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) { |
220 |
return -1; |
221 |
} |
222 |
|
223 |
if (vnameserver && !inet_aton(vnameserver, &dns)) {
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return -1; |
225 |
} |
226 |
if ((dns.s_addr & mask.s_addr) != net.s_addr ||
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dns.s_addr == host.s_addr) { |
228 |
return -1; |
229 |
} |
230 |
|
231 |
#ifndef _WIN32
|
232 |
if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
|
233 |
return -1; |
234 |
} |
235 |
#endif
|
236 |
|
237 |
nc = qemu_new_net_client(&net_slirp_info, peer, model, name); |
238 |
|
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snprintf(nc->info_str, sizeof(nc->info_str),
|
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"net=%s,restrict=%s", inet_ntoa(net),
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restricted ? "on" : "off"); |
242 |
|
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s = DO_UPCAST(SlirpState, nc, nc); |
244 |
|
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s->slirp = slirp_init(restricted, net, mask, host, vhostname, |
246 |
tftp_export, bootfile, dhcp, dns, dnssearch, s); |
247 |
QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry); |
248 |
|
249 |
for (config = slirp_configs; config; config = config->next) {
|
250 |
if (config->flags & SLIRP_CFG_HOSTFWD) {
|
251 |
if (slirp_hostfwd(s, config->str,
|
252 |
config->flags & SLIRP_CFG_LEGACY) < 0)
|
253 |
goto error;
|
254 |
} else {
|
255 |
if (slirp_guestfwd(s, config->str,
|
256 |
config->flags & SLIRP_CFG_LEGACY) < 0)
|
257 |
goto error;
|
258 |
} |
259 |
} |
260 |
#ifndef _WIN32
|
261 |
if (!smb_export) {
|
262 |
smb_export = legacy_smb_export; |
263 |
} |
264 |
if (smb_export) {
|
265 |
if (slirp_smb(s, smb_export, smbsrv) < 0) |
266 |
goto error;
|
267 |
} |
268 |
#endif
|
269 |
|
270 |
return 0; |
271 |
|
272 |
error:
|
273 |
qemu_del_net_client(nc); |
274 |
return -1; |
275 |
} |
276 |
|
277 |
static SlirpState *slirp_lookup(Monitor *mon, const char *vlan, |
278 |
const char *stack) |
279 |
{ |
280 |
|
281 |
if (vlan) {
|
282 |
NetClientState *nc; |
283 |
nc = net_hub_find_client_by_name(strtol(vlan, NULL, 0), stack); |
284 |
if (!nc) {
|
285 |
return NULL; |
286 |
} |
287 |
if (strcmp(nc->model, "user")) { |
288 |
monitor_printf(mon, "invalid device specified\n");
|
289 |
return NULL; |
290 |
} |
291 |
return DO_UPCAST(SlirpState, nc, nc);
|
292 |
} else {
|
293 |
if (QTAILQ_EMPTY(&slirp_stacks)) {
|
294 |
monitor_printf(mon, "user mode network stack not in use\n");
|
295 |
return NULL; |
296 |
} |
297 |
return QTAILQ_FIRST(&slirp_stacks);
|
298 |
} |
299 |
} |
300 |
|
301 |
void net_slirp_hostfwd_remove(Monitor *mon, const QDict *qdict) |
302 |
{ |
303 |
struct in_addr host_addr = { .s_addr = INADDR_ANY };
|
304 |
int host_port;
|
305 |
char buf[256]; |
306 |
const char *src_str, *p; |
307 |
SlirpState *s; |
308 |
int is_udp = 0; |
309 |
int err;
|
310 |
const char *arg1 = qdict_get_str(qdict, "arg1"); |
311 |
const char *arg2 = qdict_get_try_str(qdict, "arg2"); |
312 |
const char *arg3 = qdict_get_try_str(qdict, "arg3"); |
313 |
|
314 |
if (arg2) {
|
315 |
s = slirp_lookup(mon, arg1, arg2); |
316 |
src_str = arg3; |
317 |
} else {
|
318 |
s = slirp_lookup(mon, NULL, NULL); |
319 |
src_str = arg1; |
320 |
} |
321 |
if (!s) {
|
322 |
return;
|
323 |
} |
324 |
|
325 |
p = src_str; |
326 |
if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
327 |
goto fail_syntax;
|
328 |
} |
329 |
|
330 |
if (!strcmp(buf, "tcp") || buf[0] == '\0') { |
331 |
is_udp = 0;
|
332 |
} else if (!strcmp(buf, "udp")) { |
333 |
is_udp = 1;
|
334 |
} else {
|
335 |
goto fail_syntax;
|
336 |
} |
337 |
|
338 |
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
339 |
goto fail_syntax;
|
340 |
} |
341 |
if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) { |
342 |
goto fail_syntax;
|
343 |
} |
344 |
|
345 |
host_port = atoi(p); |
346 |
|
347 |
err = slirp_remove_hostfwd(QTAILQ_FIRST(&slirp_stacks)->slirp, is_udp, |
348 |
host_addr, host_port); |
349 |
|
350 |
monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
|
351 |
err ? "not found" : "removed"); |
352 |
return;
|
353 |
|
354 |
fail_syntax:
|
355 |
monitor_printf(mon, "invalid format\n");
|
356 |
} |
357 |
|
358 |
static int slirp_hostfwd(SlirpState *s, const char *redir_str, |
359 |
int legacy_format)
|
360 |
{ |
361 |
struct in_addr host_addr = { .s_addr = INADDR_ANY };
|
362 |
struct in_addr guest_addr = { .s_addr = 0 }; |
363 |
int host_port, guest_port;
|
364 |
const char *p; |
365 |
char buf[256]; |
366 |
int is_udp;
|
367 |
char *end;
|
368 |
|
369 |
p = redir_str; |
370 |
if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
371 |
goto fail_syntax;
|
372 |
} |
373 |
if (!strcmp(buf, "tcp") || buf[0] == '\0') { |
374 |
is_udp = 0;
|
375 |
} else if (!strcmp(buf, "udp")) { |
376 |
is_udp = 1;
|
377 |
} else {
|
378 |
goto fail_syntax;
|
379 |
} |
380 |
|
381 |
if (!legacy_format) {
|
382 |
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
383 |
goto fail_syntax;
|
384 |
} |
385 |
if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) { |
386 |
goto fail_syntax;
|
387 |
} |
388 |
} |
389 |
|
390 |
if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) { |
391 |
goto fail_syntax;
|
392 |
} |
393 |
host_port = strtol(buf, &end, 0);
|
394 |
if (*end != '\0' || host_port < 1 || host_port > 65535) { |
395 |
goto fail_syntax;
|
396 |
} |
397 |
|
398 |
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
399 |
goto fail_syntax;
|
400 |
} |
401 |
if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) { |
402 |
goto fail_syntax;
|
403 |
} |
404 |
|
405 |
guest_port = strtol(p, &end, 0);
|
406 |
if (*end != '\0' || guest_port < 1 || guest_port > 65535) { |
407 |
goto fail_syntax;
|
408 |
} |
409 |
|
410 |
if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
|
411 |
guest_port) < 0) {
|
412 |
error_report("could not set up host forwarding rule '%s'",
|
413 |
redir_str); |
414 |
return -1; |
415 |
} |
416 |
return 0; |
417 |
|
418 |
fail_syntax:
|
419 |
error_report("invalid host forwarding rule '%s'", redir_str);
|
420 |
return -1; |
421 |
} |
422 |
|
423 |
void net_slirp_hostfwd_add(Monitor *mon, const QDict *qdict) |
424 |
{ |
425 |
const char *redir_str; |
426 |
SlirpState *s; |
427 |
const char *arg1 = qdict_get_str(qdict, "arg1"); |
428 |
const char *arg2 = qdict_get_try_str(qdict, "arg2"); |
429 |
const char *arg3 = qdict_get_try_str(qdict, "arg3"); |
430 |
|
431 |
if (arg2) {
|
432 |
s = slirp_lookup(mon, arg1, arg2); |
433 |
redir_str = arg3; |
434 |
} else {
|
435 |
s = slirp_lookup(mon, NULL, NULL); |
436 |
redir_str = arg1; |
437 |
} |
438 |
if (s) {
|
439 |
slirp_hostfwd(s, redir_str, 0);
|
440 |
} |
441 |
|
442 |
} |
443 |
|
444 |
int net_slirp_redir(const char *redir_str) |
445 |
{ |
446 |
struct slirp_config_str *config;
|
447 |
|
448 |
if (QTAILQ_EMPTY(&slirp_stacks)) {
|
449 |
config = g_malloc(sizeof(*config));
|
450 |
pstrcpy(config->str, sizeof(config->str), redir_str);
|
451 |
config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY; |
452 |
config->next = slirp_configs; |
453 |
slirp_configs = config; |
454 |
return 0; |
455 |
} |
456 |
|
457 |
return slirp_hostfwd(QTAILQ_FIRST(&slirp_stacks), redir_str, 1); |
458 |
} |
459 |
|
460 |
#ifndef _WIN32
|
461 |
|
462 |
/* automatic user mode samba server configuration */
|
463 |
static void slirp_smb_cleanup(SlirpState *s) |
464 |
{ |
465 |
char cmd[128]; |
466 |
int ret;
|
467 |
|
468 |
if (s->smb_dir[0] != '\0') { |
469 |
snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir); |
470 |
ret = system(cmd); |
471 |
if (ret == -1 || !WIFEXITED(ret)) { |
472 |
error_report("'%s' failed.", cmd);
|
473 |
} else if (WEXITSTATUS(ret)) { |
474 |
error_report("'%s' failed. Error code: %d",
|
475 |
cmd, WEXITSTATUS(ret)); |
476 |
} |
477 |
s->smb_dir[0] = '\0'; |
478 |
} |
479 |
} |
480 |
|
481 |
static int slirp_smb(SlirpState* s, const char *exported_dir, |
482 |
struct in_addr vserver_addr)
|
483 |
{ |
484 |
static int instance; |
485 |
char smb_conf[128]; |
486 |
char smb_cmdline[128]; |
487 |
struct passwd *passwd;
|
488 |
FILE *f; |
489 |
|
490 |
passwd = getpwuid(geteuid()); |
491 |
if (!passwd) {
|
492 |
error_report("failed to retrieve user name");
|
493 |
return -1; |
494 |
} |
495 |
|
496 |
if (access(CONFIG_SMBD_COMMAND, F_OK)) {
|
497 |
error_report("could not find '%s', please install it",
|
498 |
CONFIG_SMBD_COMMAND); |
499 |
return -1; |
500 |
} |
501 |
|
502 |
if (access(exported_dir, R_OK | X_OK)) {
|
503 |
error_report("error accessing shared directory '%s': %s",
|
504 |
exported_dir, strerror(errno)); |
505 |
return -1; |
506 |
} |
507 |
|
508 |
snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d", |
509 |
(long)getpid(), instance++);
|
510 |
if (mkdir(s->smb_dir, 0700) < 0) { |
511 |
error_report("could not create samba server dir '%s'", s->smb_dir);
|
512 |
return -1; |
513 |
} |
514 |
snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf"); |
515 |
|
516 |
f = fopen(smb_conf, "w");
|
517 |
if (!f) {
|
518 |
slirp_smb_cleanup(s); |
519 |
error_report("could not create samba server configuration file '%s'",
|
520 |
smb_conf); |
521 |
return -1; |
522 |
} |
523 |
fprintf(f, |
524 |
"[global]\n"
|
525 |
"private dir=%s\n"
|
526 |
"socket address=127.0.0.1\n"
|
527 |
"pid directory=%s\n"
|
528 |
"lock directory=%s\n"
|
529 |
"state directory=%s\n"
|
530 |
"log file=%s/log.smbd\n"
|
531 |
"smb passwd file=%s/smbpasswd\n"
|
532 |
"security = share\n"
|
533 |
"[qemu]\n"
|
534 |
"path=%s\n"
|
535 |
"read only=no\n"
|
536 |
"guest ok=yes\n"
|
537 |
"force user=%s\n",
|
538 |
s->smb_dir, |
539 |
s->smb_dir, |
540 |
s->smb_dir, |
541 |
s->smb_dir, |
542 |
s->smb_dir, |
543 |
s->smb_dir, |
544 |
exported_dir, |
545 |
passwd->pw_name |
546 |
); |
547 |
fclose(f); |
548 |
|
549 |
snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s", |
550 |
CONFIG_SMBD_COMMAND, smb_conf); |
551 |
|
552 |
if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0) { |
553 |
slirp_smb_cleanup(s); |
554 |
error_report("conflicting/invalid smbserver address");
|
555 |
return -1; |
556 |
} |
557 |
return 0; |
558 |
} |
559 |
|
560 |
/* automatic user mode samba server configuration (legacy interface) */
|
561 |
int net_slirp_smb(const char *exported_dir) |
562 |
{ |
563 |
struct in_addr vserver_addr = { .s_addr = 0 }; |
564 |
|
565 |
if (legacy_smb_export) {
|
566 |
fprintf(stderr, "-smb given twice\n");
|
567 |
return -1; |
568 |
} |
569 |
legacy_smb_export = exported_dir; |
570 |
if (!QTAILQ_EMPTY(&slirp_stacks)) {
|
571 |
return slirp_smb(QTAILQ_FIRST(&slirp_stacks), exported_dir,
|
572 |
vserver_addr); |
573 |
} |
574 |
return 0; |
575 |
} |
576 |
|
577 |
#endif /* !defined(_WIN32) */ |
578 |
|
579 |
struct GuestFwd {
|
580 |
CharDriverState *hd; |
581 |
struct in_addr server;
|
582 |
int port;
|
583 |
Slirp *slirp; |
584 |
}; |
585 |
|
586 |
static int guestfwd_can_read(void *opaque) |
587 |
{ |
588 |
struct GuestFwd *fwd = opaque;
|
589 |
return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
|
590 |
} |
591 |
|
592 |
static void guestfwd_read(void *opaque, const uint8_t *buf, int size) |
593 |
{ |
594 |
struct GuestFwd *fwd = opaque;
|
595 |
slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size); |
596 |
} |
597 |
|
598 |
static int slirp_guestfwd(SlirpState *s, const char *config_str, |
599 |
int legacy_format)
|
600 |
{ |
601 |
struct in_addr server = { .s_addr = 0 }; |
602 |
struct GuestFwd *fwd;
|
603 |
const char *p; |
604 |
char buf[128]; |
605 |
char *end;
|
606 |
int port;
|
607 |
|
608 |
p = config_str; |
609 |
if (legacy_format) {
|
610 |
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
611 |
goto fail_syntax;
|
612 |
} |
613 |
} else {
|
614 |
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
615 |
goto fail_syntax;
|
616 |
} |
617 |
if (strcmp(buf, "tcp") && buf[0] != '\0') { |
618 |
goto fail_syntax;
|
619 |
} |
620 |
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
621 |
goto fail_syntax;
|
622 |
} |
623 |
if (buf[0] != '\0' && !inet_aton(buf, &server)) { |
624 |
goto fail_syntax;
|
625 |
} |
626 |
if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) { |
627 |
goto fail_syntax;
|
628 |
} |
629 |
} |
630 |
port = strtol(buf, &end, 10);
|
631 |
if (*end != '\0' || port < 1 || port > 65535) { |
632 |
goto fail_syntax;
|
633 |
} |
634 |
|
635 |
fwd = g_malloc(sizeof(struct GuestFwd)); |
636 |
snprintf(buf, sizeof(buf), "guestfwd.tcp.%d", port); |
637 |
|
638 |
if ((strlen(p) > 4) && !strncmp(p, "cmd:", 4)) { |
639 |
if (slirp_add_exec(s->slirp, 0, &p[4], &server, port) < 0) { |
640 |
error_report("conflicting/invalid host:port in guest forwarding "
|
641 |
"rule '%s'", config_str);
|
642 |
g_free(fwd); |
643 |
return -1; |
644 |
} |
645 |
} else {
|
646 |
fwd->hd = qemu_chr_new(buf, p, NULL);
|
647 |
if (!fwd->hd) {
|
648 |
error_report("could not open guest forwarding device '%s'", buf);
|
649 |
g_free(fwd); |
650 |
return -1; |
651 |
} |
652 |
|
653 |
if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) { |
654 |
error_report("conflicting/invalid host:port in guest forwarding "
|
655 |
"rule '%s'", config_str);
|
656 |
g_free(fwd); |
657 |
return -1; |
658 |
} |
659 |
fwd->server = server; |
660 |
fwd->port = port; |
661 |
fwd->slirp = s->slirp; |
662 |
|
663 |
qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read, |
664 |
NULL, fwd);
|
665 |
} |
666 |
return 0; |
667 |
|
668 |
fail_syntax:
|
669 |
error_report("invalid guest forwarding rule '%s'", config_str);
|
670 |
return -1; |
671 |
} |
672 |
|
673 |
void do_info_usernet(Monitor *mon)
|
674 |
{ |
675 |
SlirpState *s; |
676 |
|
677 |
QTAILQ_FOREACH(s, &slirp_stacks, entry) { |
678 |
int id;
|
679 |
bool got_vlan_id = net_hub_id_for_client(&s->nc, &id) == 0; |
680 |
monitor_printf(mon, "VLAN %d (%s):\n",
|
681 |
got_vlan_id ? id : -1,
|
682 |
s->nc.name); |
683 |
slirp_connection_info(s->slirp, mon); |
684 |
} |
685 |
} |
686 |
|
687 |
static void |
688 |
net_init_slirp_configs(const StringList *fwd, int flags) |
689 |
{ |
690 |
while (fwd) {
|
691 |
struct slirp_config_str *config;
|
692 |
|
693 |
config = g_malloc0(sizeof(*config));
|
694 |
pstrcpy(config->str, sizeof(config->str), fwd->value->str);
|
695 |
config->flags = flags; |
696 |
config->next = slirp_configs; |
697 |
slirp_configs = config; |
698 |
|
699 |
fwd = fwd->next; |
700 |
} |
701 |
} |
702 |
|
703 |
static const char **slirp_dnssearch(const StringList *dnsname) |
704 |
{ |
705 |
const StringList *c = dnsname;
|
706 |
size_t i = 0, num_opts = 0; |
707 |
const char **ret; |
708 |
|
709 |
while (c) {
|
710 |
num_opts++; |
711 |
c = c->next; |
712 |
} |
713 |
|
714 |
if (num_opts == 0) { |
715 |
return NULL; |
716 |
} |
717 |
|
718 |
ret = g_malloc((num_opts + 1) * sizeof(*ret)); |
719 |
c = dnsname; |
720 |
while (c) {
|
721 |
ret[i++] = c->value->str; |
722 |
c = c->next; |
723 |
} |
724 |
ret[i] = NULL;
|
725 |
return ret;
|
726 |
} |
727 |
|
728 |
int net_init_slirp(const NetClientOptions *opts, const char *name, |
729 |
NetClientState *peer) |
730 |
{ |
731 |
struct slirp_config_str *config;
|
732 |
char *vnet;
|
733 |
int ret;
|
734 |
const NetdevUserOptions *user;
|
735 |
const char **dnssearch; |
736 |
|
737 |
assert(opts->kind == NET_CLIENT_OPTIONS_KIND_USER); |
738 |
user = opts->user; |
739 |
|
740 |
vnet = user->has_net ? g_strdup(user->net) : |
741 |
user->has_ip ? g_strdup_printf("%s/24", user->ip) :
|
742 |
NULL;
|
743 |
|
744 |
dnssearch = slirp_dnssearch(user->dnssearch); |
745 |
|
746 |
/* all optional fields are initialized to "all bits zero" */
|
747 |
|
748 |
net_init_slirp_configs(user->hostfwd, SLIRP_CFG_HOSTFWD); |
749 |
net_init_slirp_configs(user->guestfwd, 0);
|
750 |
|
751 |
ret = net_slirp_init(peer, "user", name, user->q_restrict, vnet,
|
752 |
user->host, user->hostname, user->tftp, |
753 |
user->bootfile, user->dhcpstart, user->dns, user->smb, |
754 |
user->smbserver, dnssearch); |
755 |
|
756 |
while (slirp_configs) {
|
757 |
config = slirp_configs; |
758 |
slirp_configs = config->next; |
759 |
g_free(config); |
760 |
} |
761 |
|
762 |
g_free(vnet); |
763 |
g_free(dnssearch); |
764 |
|
765 |
return ret;
|
766 |
} |
767 |
|
768 |
int net_slirp_parse_legacy(QemuOptsList *opts_list, const char *optarg, int *ret) |
769 |
{ |
770 |
if (strcmp(opts_list->name, "net") != 0 || |
771 |
strncmp(optarg, "channel,", strlen("channel,")) != 0) { |
772 |
return 0; |
773 |
} |
774 |
|
775 |
/* handle legacy -net channel,port:chr */
|
776 |
optarg += strlen("channel,");
|
777 |
|
778 |
if (QTAILQ_EMPTY(&slirp_stacks)) {
|
779 |
struct slirp_config_str *config;
|
780 |
|
781 |
config = g_malloc(sizeof(*config));
|
782 |
pstrcpy(config->str, sizeof(config->str), optarg);
|
783 |
config->flags = SLIRP_CFG_LEGACY; |
784 |
config->next = slirp_configs; |
785 |
slirp_configs = config; |
786 |
*ret = 0;
|
787 |
} else {
|
788 |
*ret = slirp_guestfwd(QTAILQ_FIRST(&slirp_stacks), optarg, 1);
|
789 |
} |
790 |
|
791 |
return 1; |
792 |
} |
793 |
|