| /* |
| * 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 "qemu/log.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 <libslirp.h> |
| #include "chardev/char-fe.h" |
| #include "sysemu/sysemu.h" |
| #include "qemu/cutils.h" |
| #include "qapi/error.h" |
| #include "qapi/qmp/qdict.h" |
| #include "util.h" |
| #include "migration/register.h" |
| #include "migration/qemu-file-types.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 |
| |
| struct slirp_config_str { |
| struct slirp_config_str *next; |
| int flags; |
| char str[1024]; |
| }; |
| |
| struct GuestFwd { |
| CharBackend hd; |
| struct in_addr server; |
| int port; |
| Slirp *slirp; |
| }; |
| |
| typedef struct SlirpState { |
| NetClientState nc; |
| QTAILQ_ENTRY(SlirpState) entry; |
| Slirp *slirp; |
| Notifier poll_notifier; |
| Notifier exit_notifier; |
| #ifndef _WIN32 |
| gchar *smb_dir; |
| #endif |
| GSList *fwd; |
| } SlirpState; |
| |
| static struct slirp_config_str *slirp_configs; |
| static QTAILQ_HEAD(, SlirpState) slirp_stacks = |
| QTAILQ_HEAD_INITIALIZER(slirp_stacks); |
| |
| static int slirp_hostfwd(SlirpState *s, const char *redir_str, Error **errp); |
| static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp); |
| |
| #ifndef _WIN32 |
| static int slirp_smb(SlirpState *s, const char *exported_dir, |
| struct in_addr vserver_addr, Error **errp); |
| static void slirp_smb_cleanup(SlirpState *s); |
| #else |
| static inline void slirp_smb_cleanup(SlirpState *s) { } |
| #endif |
| |
| static ssize_t net_slirp_send_packet(const void *pkt, size_t pkt_len, |
| void *opaque) |
| { |
| SlirpState *s = opaque; |
| |
| return 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 slirp_free_fwd(gpointer data) |
| { |
| struct GuestFwd *fwd = data; |
| |
| qemu_chr_fe_deinit(&fwd->hd, true); |
| g_free(data); |
| } |
| |
| static void net_slirp_cleanup(NetClientState *nc) |
| { |
| SlirpState *s = DO_UPCAST(SlirpState, nc, nc); |
| |
| g_slist_free_full(s->fwd, slirp_free_fwd); |
| main_loop_poll_remove_notifier(&s->poll_notifier); |
| unregister_savevm(NULL, "slirp", s->slirp); |
| 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 void net_slirp_guest_error(const char *msg, void *opaque) |
| { |
| qemu_log_mask(LOG_GUEST_ERROR, "%s", msg); |
| } |
| |
| static int64_t net_slirp_clock_get_ns(void *opaque) |
| { |
| return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
| } |
| |
| static void *net_slirp_timer_new(SlirpTimerCb cb, |
| void *cb_opaque, void *opaque) |
| { |
| return timer_new_full(NULL, QEMU_CLOCK_VIRTUAL, |
| SCALE_MS, QEMU_TIMER_ATTR_EXTERNAL, |
| cb, cb_opaque); |
| } |
| |
| static void net_slirp_timer_free(void *timer, void *opaque) |
| { |
| timer_del(timer); |
| timer_free(timer); |
| } |
| |
| static void net_slirp_timer_mod(void *timer, int64_t expire_timer, |
| void *opaque) |
| { |
| timer_mod(timer, expire_timer); |
| } |
| |
| static void net_slirp_register_poll_fd(int fd, void *opaque) |
| { |
| qemu_fd_register(fd); |
| } |
| |
| static void net_slirp_unregister_poll_fd(int fd, void *opaque) |
| { |
| /* no qemu_fd_unregister */ |
| } |
| |
| static void net_slirp_notify(void *opaque) |
| { |
| qemu_notify_event(); |
| } |
| |
| static const SlirpCb slirp_cb = { |
| .send_packet = net_slirp_send_packet, |
| .guest_error = net_slirp_guest_error, |
| .clock_get_ns = net_slirp_clock_get_ns, |
| .timer_new = net_slirp_timer_new, |
| .timer_free = net_slirp_timer_free, |
| .timer_mod = net_slirp_timer_mod, |
| .register_poll_fd = net_slirp_register_poll_fd, |
| .unregister_poll_fd = net_slirp_unregister_poll_fd, |
| .notify = net_slirp_notify, |
| }; |
| |
| static int slirp_poll_to_gio(int events) |
| { |
| int ret = 0; |
| |
| if (events & SLIRP_POLL_IN) { |
| ret |= G_IO_IN; |
| } |
| if (events & SLIRP_POLL_OUT) { |
| ret |= G_IO_OUT; |
| } |
| if (events & SLIRP_POLL_PRI) { |
| ret |= G_IO_PRI; |
| } |
| if (events & SLIRP_POLL_ERR) { |
| ret |= G_IO_ERR; |
| } |
| if (events & SLIRP_POLL_HUP) { |
| ret |= G_IO_HUP; |
| } |
| |
| return ret; |
| } |
| |
| static int net_slirp_add_poll(int fd, int events, void *opaque) |
| { |
| GArray *pollfds = opaque; |
| GPollFD pfd = { |
| .fd = fd, |
| .events = slirp_poll_to_gio(events), |
| }; |
| int idx = pollfds->len; |
| g_array_append_val(pollfds, pfd); |
| return idx; |
| } |
| |
| static int slirp_gio_to_poll(int events) |
| { |
| int ret = 0; |
| |
| if (events & G_IO_IN) { |
| ret |= SLIRP_POLL_IN; |
| } |
| if (events & G_IO_OUT) { |
| ret |= SLIRP_POLL_OUT; |
| } |
| if (events & G_IO_PRI) { |
| ret |= SLIRP_POLL_PRI; |
| } |
| if (events & G_IO_ERR) { |
| ret |= SLIRP_POLL_ERR; |
| } |
| if (events & G_IO_HUP) { |
| ret |= SLIRP_POLL_HUP; |
| } |
| |
| return ret; |
| } |
| |
| static int net_slirp_get_revents(int idx, void *opaque) |
| { |
| GArray *pollfds = opaque; |
| |
| return slirp_gio_to_poll(g_array_index(pollfds, GPollFD, idx).revents); |
| } |
| |
| static void net_slirp_poll_notify(Notifier *notifier, void *data) |
| { |
| MainLoopPoll *poll = data; |
| SlirpState *s = container_of(notifier, SlirpState, poll_notifier); |
| |
| switch (poll->state) { |
| case MAIN_LOOP_POLL_FILL: |
| slirp_pollfds_fill(s->slirp, &poll->timeout, |
| net_slirp_add_poll, poll->pollfds); |
| break; |
| case MAIN_LOOP_POLL_OK: |
| case MAIN_LOOP_POLL_ERR: |
| slirp_pollfds_poll(s->slirp, poll->state == MAIN_LOOP_POLL_ERR, |
| net_slirp_get_revents, poll->pollfds); |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| |
| static ssize_t |
| net_slirp_stream_read(void *buf, size_t size, void *opaque) |
| { |
| QEMUFile *f = opaque; |
| |
| return qemu_get_buffer(f, buf, size); |
| } |
| |
| static ssize_t |
| net_slirp_stream_write(const void *buf, size_t size, void *opaque) |
| { |
| QEMUFile *f = opaque; |
| |
| qemu_put_buffer(f, buf, size); |
| if (qemu_file_get_error(f)) { |
| return -1; |
| } |
| |
| return size; |
| } |
| |
| static int net_slirp_state_load(QEMUFile *f, void *opaque, int version_id) |
| { |
| Slirp *slirp = opaque; |
| |
| return slirp_state_load(slirp, version_id, net_slirp_stream_read, f); |
| } |
| |
| static void net_slirp_state_save(QEMUFile *f, void *opaque) |
| { |
| Slirp *slirp = opaque; |
| |
| slirp_state_save(slirp, net_slirp_stream_write, f); |
| } |
| |
| static SaveVMHandlers savevm_slirp_state = { |
| .save_state = net_slirp_state_save, |
| .load_state = net_slirp_state_load, |
| }; |
| |
| 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, const char *vdomainname, |
| const char *tftp_server_name, |
| Error **errp) |
| { |
| /* 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)) { |
| error_setg(errp, "IPv4 disabled but netmask/host/dns provided"); |
| return -1; |
| } |
| |
| if (!ipv6 && (vprefix6 || vhost6 || vnameserver6)) { |
| error_setg(errp, "IPv6 disabled but prefix/host6/dns6 provided"); |
| return -1; |
| } |
| |
| if (!ipv4 && !ipv6) { |
| /* It doesn't make sense to disable both */ |
| error_setg(errp, "IPv4 and IPv6 disabled"); |
| return -1; |
| } |
| |
| if (vnetwork) { |
| if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) { |
| if (!inet_aton(vnetwork, &net)) { |
| error_setg(errp, "Failed to parse netmask"); |
| 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)) { |
| error_setg(errp, "Failed to parse netmask"); |
| return -1; |
| } |
| shift = strtol(vnetwork, &end, 10); |
| if (*end != '\0') { |
| if (!inet_aton(vnetwork, &mask)) { |
| error_setg(errp, |
| "Failed to parse netmask (trailing chars)"); |
| return -1; |
| } |
| } else if (shift < 4 || shift > 32) { |
| error_setg(errp, |
| "Invalid netmask provided (must be in range 4-32)"); |
| 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)) { |
| error_setg(errp, "Failed to parse host"); |
| return -1; |
| } |
| if ((host.s_addr & mask.s_addr) != net.s_addr) { |
| error_setg(errp, "Host doesn't belong to network"); |
| return -1; |
| } |
| |
| if (vnameserver && !inet_aton(vnameserver, &dns)) { |
| error_setg(errp, "Failed to parse DNS"); |
| return -1; |
| } |
| if (restricted && (dns.s_addr & mask.s_addr) != net.s_addr) { |
| error_setg(errp, "DNS doesn't belong to network"); |
| return -1; |
| } |
| if (dns.s_addr == host.s_addr) { |
| error_setg(errp, "DNS must be different from host"); |
| return -1; |
| } |
| |
| if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) { |
| error_setg(errp, "Failed to parse DHCP start address"); |
| return -1; |
| } |
| if ((dhcp.s_addr & mask.s_addr) != net.s_addr) { |
| error_setg(errp, "DHCP doesn't belong to network"); |
| return -1; |
| } |
| if (dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) { |
| error_setg(errp, "DNS must be different from host and DNS"); |
| return -1; |
| } |
| |
| #ifndef _WIN32 |
| if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) { |
| error_setg(errp, "Failed to parse SMB address"); |
| return -1; |
| } |
| #endif |
| |
| if (!vprefix6) { |
| vprefix6 = "fec0::"; |
| } |
| if (!inet_pton(AF_INET6, vprefix6, &ip6_prefix)) { |
| error_setg(errp, "Failed to parse IPv6 prefix"); |
| return -1; |
| } |
| |
| if (!vprefix6_len) { |
| vprefix6_len = 64; |
| } |
| if (vprefix6_len < 0 || vprefix6_len > 126) { |
| error_setg(errp, |
| "Invalid IPv6 prefix provided " |
| "(IPv6 prefix length must be between 0 and 126)"); |
| return -1; |
| } |
| |
| if (vhost6) { |
| if (!inet_pton(AF_INET6, vhost6, &ip6_host)) { |
| error_setg(errp, "Failed to parse IPv6 host"); |
| return -1; |
| } |
| if (!in6_equal_net(&ip6_prefix, &ip6_host, vprefix6_len)) { |
| error_setg(errp, "IPv6 Host doesn't belong to network"); |
| return -1; |
| } |
| } else { |
| ip6_host = ip6_prefix; |
| ip6_host.s6_addr[15] |= 2; |
| } |
| |
| if (vnameserver6) { |
| if (!inet_pton(AF_INET6, vnameserver6, &ip6_dns)) { |
| error_setg(errp, "Failed to parse IPv6 DNS"); |
| return -1; |
| } |
| if (restricted && !in6_equal_net(&ip6_prefix, &ip6_dns, vprefix6_len)) { |
| error_setg(errp, "IPv6 DNS doesn't belong to network"); |
| return -1; |
| } |
| } else { |
| ip6_dns = ip6_prefix; |
| ip6_dns.s6_addr[15] |= 3; |
| } |
| |
| if (vdomainname && !*vdomainname) { |
| error_setg(errp, "'domainname' parameter cannot be empty"); |
| return -1; |
| } |
| |
| if (vdomainname && strlen(vdomainname) > 255) { |
| error_setg(errp, "'domainname' parameter cannot exceed 255 bytes"); |
| return -1; |
| } |
| |
| if (vhostname && strlen(vhostname) > 255) { |
| error_setg(errp, "'vhostname' parameter cannot exceed 255 bytes"); |
| return -1; |
| } |
| |
| if (tftp_server_name && strlen(tftp_server_name) > 255) { |
| error_setg(errp, "'tftp-server-name' parameter cannot exceed 255 bytes"); |
| return -1; |
| } |
| |
| 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_server_name, |
| tftp_export, bootfile, dhcp, |
| dns, ip6_dns, dnssearch, vdomainname, |
| &slirp_cb, s); |
| QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry); |
| |
| /* |
| * Make sure the current bitstream version of slirp is 4, to avoid |
| * QEMU migration incompatibilities, if upstream slirp bumped the |
| * version. |
| * |
| * FIXME: use bitfields of features? teach libslirp to save with |
| * specific version? |
| */ |
| g_assert(slirp_state_version() == 4); |
| register_savevm_live("slirp", 0, slirp_state_version(), |
| &savevm_slirp_state, s->slirp); |
| |
| s->poll_notifier.notify = net_slirp_poll_notify; |
| main_loop_poll_add_notifier(&s->poll_notifier); |
| |
| for (config = slirp_configs; config; config = config->next) { |
| if (config->flags & SLIRP_CFG_HOSTFWD) { |
| if (slirp_hostfwd(s, config->str, errp) < 0) { |
| goto error; |
| } |
| } else { |
| if (slirp_guestfwd(s, config->str, errp) < 0) { |
| goto error; |
| } |
| } |
| } |
| #ifndef _WIN32 |
| if (smb_export) { |
| if (slirp_smb(s, smb_export, smbsrv, errp) < 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 *id) |
| { |
| if (id) { |
| NetClientState *nc = qemu_find_netdev(id); |
| if (!nc) { |
| monitor_printf(mon, "unrecognized netdev id '%s'\n", id); |
| 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"); |
| |
| if (arg2) { |
| s = slirp_lookup(mon, arg1); |
| src_str = arg2; |
| } else { |
| s = slirp_lookup(mon, 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; |
| } |
| |
| if (qemu_strtoi(p, NULL, 10, &host_port)) { |
| goto fail_syntax; |
| } |
| |
| 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, Error **errp) |
| { |
| 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; |
| const char *fail_reason = "Unknown reason"; |
| |
| p = redir_str; |
| if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| fail_reason = "No : separators"; |
| goto fail_syntax; |
| } |
| if (!strcmp(buf, "tcp") || buf[0] == '\0') { |
| is_udp = 0; |
| } else if (!strcmp(buf, "udp")) { |
| is_udp = 1; |
| } else { |
| fail_reason = "Bad protocol name"; |
| goto fail_syntax; |
| } |
| |
| if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| fail_reason = "Missing : separator"; |
| goto fail_syntax; |
| } |
| if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) { |
| fail_reason = "Bad host address"; |
| goto fail_syntax; |
| } |
| |
| if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) { |
| fail_reason = "Bad host port separator"; |
| goto fail_syntax; |
| } |
| host_port = strtol(buf, &end, 0); |
| if (*end != '\0' || host_port < 0 || host_port > 65535) { |
| fail_reason = "Bad host port"; |
| goto fail_syntax; |
| } |
| |
| if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| fail_reason = "Missing guest address"; |
| goto fail_syntax; |
| } |
| if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) { |
| fail_reason = "Bad guest address"; |
| goto fail_syntax; |
| } |
| |
| guest_port = strtol(p, &end, 0); |
| if (*end != '\0' || guest_port < 1 || guest_port > 65535) { |
| fail_reason = "Bad guest port"; |
| goto fail_syntax; |
| } |
| |
| if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr, |
| guest_port) < 0) { |
| error_setg(errp, "Could not set up host forwarding rule '%s'", |
| redir_str); |
| return -1; |
| } |
| return 0; |
| |
| fail_syntax: |
| error_setg(errp, "Invalid host forwarding rule '%s' (%s)", redir_str, |
| fail_reason); |
| 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"); |
| |
| if (arg2) { |
| s = slirp_lookup(mon, arg1); |
| redir_str = arg2; |
| } else { |
| s = slirp_lookup(mon, NULL); |
| redir_str = arg1; |
| } |
| if (s) { |
| Error *err = NULL; |
| if (slirp_hostfwd(s, redir_str, &err) < 0) { |
| error_report_err(err); |
| } |
| } |
| |
| } |
| |
| #ifndef _WIN32 |
| |
| /* automatic user mode samba server configuration */ |
| static void slirp_smb_cleanup(SlirpState *s) |
| { |
| int ret; |
| |
| if (s->smb_dir) { |
| gchar *cmd = g_strdup_printf("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)); |
| } |
| g_free(cmd); |
| g_free(s->smb_dir); |
| s->smb_dir = NULL; |
| } |
| } |
| |
| static int slirp_smb(SlirpState* s, const char *exported_dir, |
| struct in_addr vserver_addr, Error **errp) |
| { |
| char *smb_conf; |
| char *smb_cmdline; |
| struct passwd *passwd; |
| FILE *f; |
| |
| passwd = getpwuid(geteuid()); |
| if (!passwd) { |
| error_setg(errp, "Failed to retrieve user name"); |
| return -1; |
| } |
| |
| if (access(CONFIG_SMBD_COMMAND, F_OK)) { |
| error_setg(errp, "Could not find '%s', please install it", |
| CONFIG_SMBD_COMMAND); |
| return -1; |
| } |
| |
| if (access(exported_dir, R_OK | X_OK)) { |
| error_setg(errp, "Error accessing shared directory '%s': %s", |
| exported_dir, strerror(errno)); |
| return -1; |
| } |
| |
| s->smb_dir = g_dir_make_tmp("qemu-smb.XXXXXX", NULL); |
| if (!s->smb_dir) { |
| error_setg(errp, "Could not create samba server dir"); |
| return -1; |
| } |
| smb_conf = g_strdup_printf("%s/%s", s->smb_dir, "smb.conf"); |
| |
| f = fopen(smb_conf, "w"); |
| if (!f) { |
| slirp_smb_cleanup(s); |
| error_setg(errp, |
| "Could not create samba server configuration file '%s'", |
| smb_conf); |
| g_free(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); |
| |
| smb_cmdline = g_strdup_printf("%s -l %s -s %s", |
| CONFIG_SMBD_COMMAND, s->smb_dir, smb_conf); |
| g_free(smb_conf); |
| |
| if (slirp_add_exec(s->slirp, smb_cmdline, &vserver_addr, 139) < 0 || |
| slirp_add_exec(s->slirp, smb_cmdline, &vserver_addr, 445) < 0) { |
| slirp_smb_cleanup(s); |
| g_free(smb_cmdline); |
| error_setg(errp, "Conflicting/invalid smbserver address"); |
| return -1; |
| } |
| g_free(smb_cmdline); |
| return 0; |
| } |
| |
| #endif /* !defined(_WIN32) */ |
| |
| 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 ssize_t guestfwd_write(const void *buf, size_t len, void *chr) |
| { |
| return qemu_chr_fe_write_all(chr, buf, len); |
| } |
| |
| static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp) |
| { |
| /* TODO: IPv6 */ |
| struct in_addr server = { .s_addr = 0 }; |
| struct GuestFwd *fwd; |
| const char *p; |
| char buf[128]; |
| char *end; |
| int port; |
| |
| p = config_str; |
| 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 (g_str_has_prefix(p, "cmd:")) { |
| if (slirp_add_exec(s->slirp, &p[4], &server, port) < 0) { |
| error_setg(errp, "Conflicting/invalid host:port in guest " |
| "forwarding rule '%s'", config_str); |
| return -1; |
| } |
| } else { |
| Error *err = NULL; |
| /* |
| * FIXME: sure we want to support implicit |
| * muxed monitors here? |
| */ |
| Chardev *chr = qemu_chr_new_mux_mon(buf, p, NULL); |
| |
| if (!chr) { |
| error_setg(errp, "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_propagate(errp, err); |
| object_unparent(OBJECT(chr)); |
| g_free(fwd); |
| return -1; |
| } |
| |
| if (slirp_add_guestfwd(s->slirp, guestfwd_write, &fwd->hd, |
| &server, port) < 0) { |
| error_setg(errp, "Conflicting/invalid host:port in guest " |
| "forwarding rule '%s'", config_str); |
| qemu_chr_fe_deinit(&fwd->hd, true); |
| 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, NULL, fwd, NULL, true); |
| s->fwd = g_slist_append(s->fwd, fwd); |
| } |
| return 0; |
| |
| fail_syntax: |
| error_setg(errp, "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_hub_id = net_hub_id_for_client(&s->nc, &id) == 0; |
| char *info = slirp_connection_info(s->slirp); |
| monitor_printf(mon, "Hub %d (%s):\n%s", |
| got_hub_id ? id : -1, |
| s->nc.name, info); |
| g_free(info); |
| } |
| } |
| |
| 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) |
| { |
| 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, user->domainname, |
| user->tftp_server_name, errp); |
| |
| while (slirp_configs) { |
| config = slirp_configs; |
| slirp_configs = config->next; |
| g_free(config); |
| } |
| |
| g_free(vnet); |
| g_free(dnssearch); |
| |
| return ret; |
| } |
