| /* |
| * 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 "qemu/osdep.h" |
| #include "net/slirp.h" |
| |
| |
| #ifndef _WIN32 |
| #include <pwd.h> |
| #include <sys/wait.h> |
| #endif |
| #include "net/net.h" |
| #include "clients.h" |
| #include "hub.h" |
| #include "monitor/monitor.h" |
| #include "qemu/error-report.h" |
| #include "qemu/sockets.h" |
| #include "slirp/libslirp.h" |
| #include "slirp/ip6.h" |
| #include "sysemu/char.h" |
| #include "sysemu/sysemu.h" |
| #include "qemu/cutils.h" |
| #include "qapi/error.h" |
| |
| 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; |
| } |
| |
| /* slirp network adapter */ |
| |
| #define SLIRP_CFG_HOSTFWD 1 |
| #define SLIRP_CFG_LEGACY 2 |
| |
| struct slirp_config_str { |
| struct slirp_config_str *next; |
| int flags; |
| char str[1024]; |
| int legacy_format; |
| }; |
| |
| typedef struct SlirpState { |
| NetClientState nc; |
| QTAILQ_ENTRY(SlirpState) entry; |
| Slirp *slirp; |
| Notifier exit_notifier; |
| #ifndef _WIN32 |
| char smb_dir[128]; |
| #endif |
| } SlirpState; |
| |
| static struct slirp_config_str *slirp_configs; |
| const char *legacy_tftp_prefix; |
| const char *legacy_bootp_filename; |
| static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks = |
| QTAILQ_HEAD_INITIALIZER(slirp_stacks); |
| |
| static int slirp_hostfwd(SlirpState *s, const char *redir_str, |
| int legacy_format); |
| static int slirp_guestfwd(SlirpState *s, const char *config_str, |
| int legacy_format); |
| |
| #ifndef _WIN32 |
| static const char *legacy_smb_export; |
| |
| static int slirp_smb(SlirpState *s, const char *exported_dir, |
| struct in_addr vserver_addr); |
| static void slirp_smb_cleanup(SlirpState *s); |
| #else |
| static inline void slirp_smb_cleanup(SlirpState *s) { } |
| #endif |
| |
| void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len) |
| { |
| SlirpState *s = opaque; |
| |
| qemu_send_packet(&s->nc, pkt, pkt_len); |
| } |
| |
| static ssize_t net_slirp_receive(NetClientState *nc, const uint8_t *buf, size_t size) |
| { |
| SlirpState *s = DO_UPCAST(SlirpState, nc, nc); |
| |
| slirp_input(s->slirp, buf, size); |
| |
| return size; |
| } |
| |
| static void slirp_smb_exit(Notifier *n, void *data) |
| { |
| SlirpState *s = container_of(n, SlirpState, exit_notifier); |
| slirp_smb_cleanup(s); |
| } |
| |
| static void net_slirp_cleanup(NetClientState *nc) |
| { |
| SlirpState *s = DO_UPCAST(SlirpState, nc, nc); |
| |
| slirp_cleanup(s->slirp); |
| if (s->exit_notifier.notify) { |
| qemu_remove_exit_notifier(&s->exit_notifier); |
| } |
| slirp_smb_cleanup(s); |
| QTAILQ_REMOVE(&slirp_stacks, s, entry); |
| } |
| |
| static NetClientInfo net_slirp_info = { |
| .type = NET_CLIENT_DRIVER_USER, |
| .size = sizeof(SlirpState), |
| .receive = net_slirp_receive, |
| .cleanup = net_slirp_cleanup, |
| }; |
| |
| static int net_slirp_init(NetClientState *peer, const char *model, |
| const char *name, int restricted, |
| bool ipv4, const char *vnetwork, const char *vhost, |
| bool ipv6, const char *vprefix6, int vprefix6_len, |
| const char *vhost6, |
| const char *vhostname, const char *tftp_export, |
| const char *bootfile, const char *vdhcp_start, |
| const char *vnameserver, const char *vnameserver6, |
| const char *smb_export, const char *vsmbserver, |
| const char **dnssearch) |
| { |
| /* default settings according to historic slirp */ |
| struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */ |
| struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */ |
| struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */ |
| struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */ |
| struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */ |
| struct in6_addr ip6_prefix; |
| struct in6_addr ip6_host; |
| struct in6_addr ip6_dns; |
| #ifndef _WIN32 |
| struct in_addr smbsrv = { .s_addr = 0 }; |
| #endif |
| NetClientState *nc; |
| SlirpState *s; |
| char buf[20]; |
| uint32_t addr; |
| int shift; |
| char *end; |
| struct slirp_config_str *config; |
| |
| if (!ipv4 && (vnetwork || vhost || vnameserver)) { |
| return -1; |
| } |
| |
| if (!ipv6 && (vprefix6 || vhost6 || vnameserver6)) { |
| return -1; |
| } |
| |
| if (!ipv4 && !ipv6) { |
| /* It doesn't make sense to disable both */ |
| return -1; |
| } |
| |
| if (!tftp_export) { |
| tftp_export = legacy_tftp_prefix; |
| } |
| if (!bootfile) { |
| bootfile = legacy_bootp_filename; |
| } |
| |
| if (vnetwork) { |
| if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) { |
| if (!inet_aton(vnetwork, &net)) { |
| return -1; |
| } |
| addr = ntohl(net.s_addr); |
| if (!(addr & 0x80000000)) { |
| mask.s_addr = htonl(0xff000000); /* class A */ |
| } else if ((addr & 0xfff00000) == 0xac100000) { |
| mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */ |
| } else if ((addr & 0xc0000000) == 0x80000000) { |
| mask.s_addr = htonl(0xffff0000); /* class B */ |
| } else if ((addr & 0xffff0000) == 0xc0a80000) { |
| mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */ |
| } else if ((addr & 0xffff0000) == 0xc6120000) { |
| mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */ |
| } else if ((addr & 0xe0000000) == 0xe0000000) { |
| mask.s_addr = htonl(0xffffff00); /* class C */ |
| } else { |
| mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */ |
| } |
| } else { |
| if (!inet_aton(buf, &net)) { |
| return -1; |
| } |
| shift = strtol(vnetwork, &end, 10); |
| if (*end != '\0') { |
| if (!inet_aton(vnetwork, &mask)) { |
| return -1; |
| } |
| } else if (shift < 4 || shift > 32) { |
| return -1; |
| } else { |
| mask.s_addr = htonl(0xffffffff << (32 - shift)); |
| } |
| } |
| net.s_addr &= mask.s_addr; |
| host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr); |
| dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr); |
| dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr); |
| } |
| |
| if (vhost && !inet_aton(vhost, &host)) { |
| return -1; |
| } |
| if ((host.s_addr & mask.s_addr) != net.s_addr) { |
| return -1; |
| } |
| |
| if (vnameserver && !inet_aton(vnameserver, &dns)) { |
| return -1; |
| } |
| if ((dns.s_addr & mask.s_addr) != net.s_addr || |
| dns.s_addr == host.s_addr) { |
| return -1; |
| } |
| |
| if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) { |
| return -1; |
| } |
| if ((dhcp.s_addr & mask.s_addr) != net.s_addr || |
| dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) { |
| return -1; |
| } |
| |
| #ifndef _WIN32 |
| if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) { |
| return -1; |
| } |
| #endif |
| |
| #if defined(_WIN32) && (_WIN32_WINNT < 0x0600) |
| /* No inet_pton helper before Vista... */ |
| if (vprefix6) { |
| /* Unsupported */ |
| return -1; |
| } |
| memset(&ip6_prefix, 0, sizeof(ip6_prefix)); |
| ip6_prefix.s6_addr[0] = 0xfe; |
| ip6_prefix.s6_addr[1] = 0xc0; |
| #else |
| if (!vprefix6) { |
| vprefix6 = "fec0::"; |
| } |
| if (!inet_pton(AF_INET6, vprefix6, &ip6_prefix)) { |
| return -1; |
| } |
| #endif |
| |
| if (!vprefix6_len) { |
| vprefix6_len = 64; |
| } |
| if (vprefix6_len < 0 || vprefix6_len > 126) { |
| return -1; |
| } |
| |
| if (vhost6) { |
| #if defined(_WIN32) && (_WIN32_WINNT < 0x0600) |
| return -1; |
| #else |
| if (!inet_pton(AF_INET6, vhost6, &ip6_host)) { |
| return -1; |
| } |
| if (!in6_equal_net(&ip6_prefix, &ip6_host, vprefix6_len)) { |
| return -1; |
| } |
| #endif |
| } else { |
| ip6_host = ip6_prefix; |
| ip6_host.s6_addr[15] |= 2; |
| } |
| |
| if (vnameserver6) { |
| #if defined(_WIN32) && (_WIN32_WINNT < 0x0600) |
| return -1; |
| #else |
| if (!inet_pton(AF_INET6, vnameserver6, &ip6_dns)) { |
| return -1; |
| } |
| if (!in6_equal_net(&ip6_prefix, &ip6_dns, vprefix6_len)) { |
| return -1; |
| } |
| #endif |
| } else { |
| ip6_dns = ip6_prefix; |
| ip6_dns.s6_addr[15] |= 3; |
| } |
| |
| |
| nc = qemu_new_net_client(&net_slirp_info, peer, model, name); |
| |
| snprintf(nc->info_str, sizeof(nc->info_str), |
| "net=%s,restrict=%s", inet_ntoa(net), |
| restricted ? "on" : "off"); |
| |
| s = DO_UPCAST(SlirpState, nc, nc); |
| |
| s->slirp = slirp_init(restricted, ipv4, net, mask, host, |
| ipv6, ip6_prefix, vprefix6_len, ip6_host, |
| vhostname, tftp_export, bootfile, dhcp, |
| dns, ip6_dns, dnssearch, s); |
| QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry); |
| |
| for (config = slirp_configs; config; config = config->next) { |
| if (config->flags & SLIRP_CFG_HOSTFWD) { |
| if (slirp_hostfwd(s, config->str, |
| config->flags & SLIRP_CFG_LEGACY) < 0) |
| goto error; |
| } else { |
| if (slirp_guestfwd(s, config->str, |
| config->flags & SLIRP_CFG_LEGACY) < 0) |
| goto error; |
| } |
| } |
| #ifndef _WIN32 |
| if (!smb_export) { |
| smb_export = legacy_smb_export; |
| } |
| if (smb_export) { |
| if (slirp_smb(s, smb_export, smbsrv) < 0) |
| goto error; |
| } |
| #endif |
| |
| s->exit_notifier.notify = slirp_smb_exit; |
| qemu_add_exit_notifier(&s->exit_notifier); |
| return 0; |
| |
| error: |
| qemu_del_net_client(nc); |
| return -1; |
| } |
| |
| static SlirpState *slirp_lookup(Monitor *mon, const char *vlan, |
| const char *stack) |
| { |
| |
| if (vlan) { |
| NetClientState *nc; |
| nc = net_hub_find_client_by_name(strtol(vlan, NULL, 0), stack); |
| if (!nc) { |
| monitor_printf(mon, "unrecognized (vlan-id, stackname) pair\n"); |
| return NULL; |
| } |
| if (strcmp(nc->model, "user")) { |
| monitor_printf(mon, "invalid device specified\n"); |
| return NULL; |
| } |
| return DO_UPCAST(SlirpState, nc, nc); |
| } else { |
| if (QTAILQ_EMPTY(&slirp_stacks)) { |
| monitor_printf(mon, "user mode network stack not in use\n"); |
| return NULL; |
| } |
| return QTAILQ_FIRST(&slirp_stacks); |
| } |
| } |
| |
| void hmp_hostfwd_remove(Monitor *mon, const QDict *qdict) |
| { |
| struct in_addr host_addr = { .s_addr = INADDR_ANY }; |
| int host_port; |
| char buf[256]; |
| const char *src_str, *p; |
| SlirpState *s; |
| int is_udp = 0; |
| int err; |
| const char *arg1 = qdict_get_str(qdict, "arg1"); |
| const char *arg2 = qdict_get_try_str(qdict, "arg2"); |
| const char *arg3 = qdict_get_try_str(qdict, "arg3"); |
| |
| if (arg2) { |
| s = slirp_lookup(mon, arg1, arg2); |
| src_str = arg3; |
| } else { |
| s = slirp_lookup(mon, NULL, NULL); |
| src_str = arg1; |
| } |
| if (!s) { |
| return; |
| } |
| |
| p = src_str; |
| if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| goto fail_syntax; |
| } |
| |
| if (!strcmp(buf, "tcp") || buf[0] == '\0') { |
| is_udp = 0; |
| } else if (!strcmp(buf, "udp")) { |
| is_udp = 1; |
| } else { |
| goto fail_syntax; |
| } |
| |
| if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| goto fail_syntax; |
| } |
| if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) { |
| goto fail_syntax; |
| } |
| |
| host_port = atoi(p); |
| |
| err = slirp_remove_hostfwd(s->slirp, is_udp, host_addr, host_port); |
| |
| monitor_printf(mon, "host forwarding rule for %s %s\n", src_str, |
| err ? "not found" : "removed"); |
| return; |
| |
| fail_syntax: |
| monitor_printf(mon, "invalid format\n"); |
| } |
| |
| static int slirp_hostfwd(SlirpState *s, const char *redir_str, |
| int legacy_format) |
| { |
| struct in_addr host_addr = { .s_addr = INADDR_ANY }; |
| struct in_addr guest_addr = { .s_addr = 0 }; |
| int host_port, guest_port; |
| const char *p; |
| char buf[256]; |
| int is_udp; |
| char *end; |
| |
| p = redir_str; |
| if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| goto fail_syntax; |
| } |
| if (!strcmp(buf, "tcp") || buf[0] == '\0') { |
| is_udp = 0; |
| } else if (!strcmp(buf, "udp")) { |
| is_udp = 1; |
| } else { |
| goto fail_syntax; |
| } |
| |
| if (!legacy_format) { |
| if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| goto fail_syntax; |
| } |
| if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) { |
| goto fail_syntax; |
| } |
| } |
| |
| if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) { |
| goto fail_syntax; |
| } |
| host_port = strtol(buf, &end, 0); |
| if (*end != '\0' || host_port < 1 || host_port > 65535) { |
| goto fail_syntax; |
| } |
| |
| if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| goto fail_syntax; |
| } |
| if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) { |
| goto fail_syntax; |
| } |
| |
| guest_port = strtol(p, &end, 0); |
| if (*end != '\0' || guest_port < 1 || guest_port > 65535) { |
| goto fail_syntax; |
| } |
| |
| if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr, |
| guest_port) < 0) { |
| error_report("could not set up host forwarding rule '%s'", |
| redir_str); |
| return -1; |
| } |
| return 0; |
| |
| fail_syntax: |
| error_report("invalid host forwarding rule '%s'", redir_str); |
| return -1; |
| } |
| |
| void hmp_hostfwd_add(Monitor *mon, const QDict *qdict) |
| { |
| const char *redir_str; |
| SlirpState *s; |
| const char *arg1 = qdict_get_str(qdict, "arg1"); |
| const char *arg2 = qdict_get_try_str(qdict, "arg2"); |
| const char *arg3 = qdict_get_try_str(qdict, "arg3"); |
| |
| if (arg2) { |
| s = slirp_lookup(mon, arg1, arg2); |
| redir_str = arg3; |
| } else { |
| s = slirp_lookup(mon, NULL, NULL); |
| redir_str = arg1; |
| } |
| if (s) { |
| slirp_hostfwd(s, redir_str, 0); |
| } |
| |
| } |
| |
| int net_slirp_redir(const char *redir_str) |
| { |
| struct slirp_config_str *config; |
| |
| if (QTAILQ_EMPTY(&slirp_stacks)) { |
| config = g_malloc(sizeof(*config)); |
| pstrcpy(config->str, sizeof(config->str), redir_str); |
| config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY; |
| config->next = slirp_configs; |
| slirp_configs = config; |
| return 0; |
| } |
| |
| return slirp_hostfwd(QTAILQ_FIRST(&slirp_stacks), redir_str, 1); |
| } |
| |
| #ifndef _WIN32 |
| |
| /* automatic user mode samba server configuration */ |
| static void slirp_smb_cleanup(SlirpState *s) |
| { |
| char cmd[128]; |
| int ret; |
| |
| if (s->smb_dir[0] != '\0') { |
| snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir); |
| ret = system(cmd); |
| if (ret == -1 || !WIFEXITED(ret)) { |
| error_report("'%s' failed.", cmd); |
| } else if (WEXITSTATUS(ret)) { |
| error_report("'%s' failed. Error code: %d", |
| cmd, WEXITSTATUS(ret)); |
| } |
| s->smb_dir[0] = '\0'; |
| } |
| } |
| |
| static int slirp_smb(SlirpState* s, const char *exported_dir, |
| struct in_addr vserver_addr) |
| { |
| char smb_conf[128]; |
| char smb_cmdline[128]; |
| struct passwd *passwd; |
| FILE *f; |
| |
| passwd = getpwuid(geteuid()); |
| if (!passwd) { |
| error_report("failed to retrieve user name"); |
| return -1; |
| } |
| |
| if (access(CONFIG_SMBD_COMMAND, F_OK)) { |
| error_report("could not find '%s', please install it", |
| CONFIG_SMBD_COMMAND); |
| return -1; |
| } |
| |
| if (access(exported_dir, R_OK | X_OK)) { |
| error_report("error accessing shared directory '%s': %s", |
| exported_dir, strerror(errno)); |
| return -1; |
| } |
| |
| snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.XXXXXX"); |
| if (!mkdtemp(s->smb_dir)) { |
| error_report("could not create samba server dir '%s'", s->smb_dir); |
| s->smb_dir[0] = 0; |
| return -1; |
| } |
| snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf"); |
| |
| f = fopen(smb_conf, "w"); |
| if (!f) { |
| slirp_smb_cleanup(s); |
| error_report("could not create samba server configuration file '%s'", |
| smb_conf); |
| return -1; |
| } |
| fprintf(f, |
| "[global]\n" |
| "private dir=%s\n" |
| "interfaces=127.0.0.1\n" |
| "bind interfaces only=yes\n" |
| "pid directory=%s\n" |
| "lock directory=%s\n" |
| "state directory=%s\n" |
| "cache directory=%s\n" |
| "ncalrpc dir=%s/ncalrpc\n" |
| "log file=%s/log.smbd\n" |
| "smb passwd file=%s/smbpasswd\n" |
| "security = user\n" |
| "map to guest = Bad User\n" |
| "load printers = no\n" |
| "printing = bsd\n" |
| "disable spoolss = yes\n" |
| "usershare max shares = 0\n" |
| "[qemu]\n" |
| "path=%s\n" |
| "read only=no\n" |
| "guest ok=yes\n" |
| "force user=%s\n", |
| s->smb_dir, |
| s->smb_dir, |
| s->smb_dir, |
| s->smb_dir, |
| s->smb_dir, |
| s->smb_dir, |
| s->smb_dir, |
| s->smb_dir, |
| exported_dir, |
| passwd->pw_name |
| ); |
| fclose(f); |
| |
| snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -l %s -s %s", |
| CONFIG_SMBD_COMMAND, s->smb_dir, smb_conf); |
| |
| if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0 || |
| slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 445) < 0) { |
| slirp_smb_cleanup(s); |
| error_report("conflicting/invalid smbserver address"); |
| return -1; |
| } |
| return 0; |
| } |
| |
| /* automatic user mode samba server configuration (legacy interface) */ |
| int net_slirp_smb(const char *exported_dir) |
| { |
| struct in_addr vserver_addr = { .s_addr = 0 }; |
| |
| if (legacy_smb_export) { |
| fprintf(stderr, "-smb given twice\n"); |
| return -1; |
| } |
| legacy_smb_export = exported_dir; |
| if (!QTAILQ_EMPTY(&slirp_stacks)) { |
| return slirp_smb(QTAILQ_FIRST(&slirp_stacks), exported_dir, |
| vserver_addr); |
| } |
| return 0; |
| } |
| |
| #endif /* !defined(_WIN32) */ |
| |
| struct GuestFwd { |
| CharBackend hd; |
| struct in_addr server; |
| int port; |
| Slirp *slirp; |
| }; |
| |
| static int guestfwd_can_read(void *opaque) |
| { |
| struct GuestFwd *fwd = opaque; |
| return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port); |
| } |
| |
| static void guestfwd_read(void *opaque, const uint8_t *buf, int size) |
| { |
| struct GuestFwd *fwd = opaque; |
| slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size); |
| } |
| |
| static int slirp_guestfwd(SlirpState *s, const char *config_str, |
| int legacy_format) |
| { |
| struct in_addr server = { .s_addr = 0 }; |
| struct GuestFwd *fwd; |
| const char *p; |
| char buf[128]; |
| char *end; |
| int port; |
| |
| p = config_str; |
| if (legacy_format) { |
| if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| goto fail_syntax; |
| } |
| } else { |
| if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| goto fail_syntax; |
| } |
| if (strcmp(buf, "tcp") && buf[0] != '\0') { |
| goto fail_syntax; |
| } |
| if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| goto fail_syntax; |
| } |
| if (buf[0] != '\0' && !inet_aton(buf, &server)) { |
| goto fail_syntax; |
| } |
| if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) { |
| goto fail_syntax; |
| } |
| } |
| port = strtol(buf, &end, 10); |
| if (*end != '\0' || port < 1 || port > 65535) { |
| goto fail_syntax; |
| } |
| |
| snprintf(buf, sizeof(buf), "guestfwd.tcp.%d", port); |
| |
| if ((strlen(p) > 4) && !strncmp(p, "cmd:", 4)) { |
| if (slirp_add_exec(s->slirp, 0, &p[4], &server, port) < 0) { |
| error_report("conflicting/invalid host:port in guest forwarding " |
| "rule '%s'", config_str); |
| return -1; |
| } |
| } else { |
| Error *err = NULL; |
| CharDriverState *chr = qemu_chr_new(buf, p); |
| |
| if (!chr) { |
| error_report("could not open guest forwarding device '%s'", buf); |
| return -1; |
| } |
| |
| fwd = g_new(struct GuestFwd, 1); |
| qemu_chr_fe_init(&fwd->hd, chr, &err); |
| if (err) { |
| error_report_err(err); |
| g_free(fwd); |
| return -1; |
| } |
| |
| if (slirp_add_exec(s->slirp, 3, qemu_chr_fe_get_driver(&fwd->hd), |
| &server, port) < 0) { |
| error_report("conflicting/invalid host:port in guest forwarding " |
| "rule '%s'", config_str); |
| g_free(fwd); |
| return -1; |
| } |
| fwd->server = server; |
| fwd->port = port; |
| fwd->slirp = s->slirp; |
| |
| qemu_chr_fe_set_handlers(&fwd->hd, guestfwd_can_read, guestfwd_read, |
| NULL, fwd, NULL, true); |
| } |
| return 0; |
| |
| fail_syntax: |
| error_report("invalid guest forwarding rule '%s'", config_str); |
| return -1; |
| } |
| |
| void hmp_info_usernet(Monitor *mon, const QDict *qdict) |
| { |
| SlirpState *s; |
| |
| QTAILQ_FOREACH(s, &slirp_stacks, entry) { |
| int id; |
| bool got_vlan_id = net_hub_id_for_client(&s->nc, &id) == 0; |
| monitor_printf(mon, "VLAN %d (%s):\n", |
| got_vlan_id ? id : -1, |
| s->nc.name); |
| slirp_connection_info(s->slirp, mon); |
| } |
| } |
| |
| static void |
| net_init_slirp_configs(const StringList *fwd, int flags) |
| { |
| while (fwd) { |
| struct slirp_config_str *config; |
| |
| config = g_malloc0(sizeof(*config)); |
| pstrcpy(config->str, sizeof(config->str), fwd->value->str); |
| config->flags = flags; |
| config->next = slirp_configs; |
| slirp_configs = config; |
| |
| fwd = fwd->next; |
| } |
| } |
| |
| static const char **slirp_dnssearch(const StringList *dnsname) |
| { |
| const StringList *c = dnsname; |
| size_t i = 0, num_opts = 0; |
| const char **ret; |
| |
| while (c) { |
| num_opts++; |
| c = c->next; |
| } |
| |
| if (num_opts == 0) { |
| return NULL; |
| } |
| |
| ret = g_malloc((num_opts + 1) * sizeof(*ret)); |
| c = dnsname; |
| while (c) { |
| ret[i++] = c->value->str; |
| c = c->next; |
| } |
| ret[i] = NULL; |
| return ret; |
| } |
| |
| int net_init_slirp(const Netdev *netdev, const char *name, |
| NetClientState *peer, Error **errp) |
| { |
| /* FIXME error_setg(errp, ...) on failure */ |
| struct slirp_config_str *config; |
| char *vnet; |
| int ret; |
| const NetdevUserOptions *user; |
| const char **dnssearch; |
| bool ipv4 = true, ipv6 = true; |
| |
| assert(netdev->type == NET_CLIENT_DRIVER_USER); |
| user = &netdev->u.user; |
| |
| if ((user->has_ipv6 && user->ipv6 && !user->has_ipv4) || |
| (user->has_ipv4 && !user->ipv4)) { |
| ipv4 = 0; |
| } |
| if ((user->has_ipv4 && user->ipv4 && !user->has_ipv6) || |
| (user->has_ipv6 && !user->ipv6)) { |
| ipv6 = 0; |
| } |
| |
| vnet = user->has_net ? g_strdup(user->net) : |
| user->has_ip ? g_strdup_printf("%s/24", user->ip) : |
| NULL; |
| |
| dnssearch = slirp_dnssearch(user->dnssearch); |
| |
| /* all optional fields are initialized to "all bits zero" */ |
| |
| net_init_slirp_configs(user->hostfwd, SLIRP_CFG_HOSTFWD); |
| net_init_slirp_configs(user->guestfwd, 0); |
| |
| ret = net_slirp_init(peer, "user", name, user->q_restrict, |
| ipv4, vnet, user->host, |
| ipv6, user->ipv6_prefix, user->ipv6_prefixlen, |
| user->ipv6_host, user->hostname, user->tftp, |
| user->bootfile, user->dhcpstart, |
| user->dns, user->ipv6_dns, user->smb, |
| user->smbserver, dnssearch); |
| |
| while (slirp_configs) { |
| config = slirp_configs; |
| slirp_configs = config->next; |
| g_free(config); |
| } |
| |
| g_free(vnet); |
| g_free(dnssearch); |
| |
| return ret; |
| } |
| |
| int net_slirp_parse_legacy(QemuOptsList *opts_list, const char *optarg, int *ret) |
| { |
| if (strcmp(opts_list->name, "net") != 0 || |
| strncmp(optarg, "channel,", strlen("channel,")) != 0) { |
| return 0; |
| } |
| |
| error_report("The '-net channel' option is deprecated. " |
| "Please use '-netdev user,guestfwd=...' instead."); |
| |
| /* handle legacy -net channel,port:chr */ |
| optarg += strlen("channel,"); |
| |
| if (QTAILQ_EMPTY(&slirp_stacks)) { |
| struct slirp_config_str *config; |
| |
| config = g_malloc(sizeof(*config)); |
| pstrcpy(config->str, sizeof(config->str), optarg); |
| config->flags = SLIRP_CFG_LEGACY; |
| config->next = slirp_configs; |
| slirp_configs = config; |
| *ret = 0; |
| } else { |
| *ret = slirp_guestfwd(QTAILQ_FIRST(&slirp_stacks), optarg, 1); |
| } |
| |
| return 1; |
| } |
| |
