| /* |
| * libslirp |
| * |
| * Copyright (c) 2004-2008 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 "slirp.h" |
| #include "state.h" |
| #include "migration/vmstate.h" |
| #include "migration/qemu-file-types.h" |
| #include "migration/register.h" |
| |
| static int slirp_tcp_post_load(void *opaque, int version) |
| { |
| tcp_template((struct tcpcb *)opaque); |
| |
| return 0; |
| } |
| |
| static const VMStateDescription vmstate_slirp_tcp = { |
| .name = "slirp-tcp", |
| .version_id = 0, |
| .post_load = slirp_tcp_post_load, |
| .fields = (VMStateField[]) { |
| VMSTATE_INT16(t_state, struct tcpcb), |
| VMSTATE_INT16_ARRAY(t_timer, struct tcpcb, TCPT_NTIMERS), |
| VMSTATE_INT16(t_rxtshift, struct tcpcb), |
| VMSTATE_INT16(t_rxtcur, struct tcpcb), |
| VMSTATE_INT16(t_dupacks, struct tcpcb), |
| VMSTATE_UINT16(t_maxseg, struct tcpcb), |
| VMSTATE_UINT8(t_force, struct tcpcb), |
| VMSTATE_UINT16(t_flags, struct tcpcb), |
| VMSTATE_UINT32(snd_una, struct tcpcb), |
| VMSTATE_UINT32(snd_nxt, struct tcpcb), |
| VMSTATE_UINT32(snd_up, struct tcpcb), |
| VMSTATE_UINT32(snd_wl1, struct tcpcb), |
| VMSTATE_UINT32(snd_wl2, struct tcpcb), |
| VMSTATE_UINT32(iss, struct tcpcb), |
| VMSTATE_UINT32(snd_wnd, struct tcpcb), |
| VMSTATE_UINT32(rcv_wnd, struct tcpcb), |
| VMSTATE_UINT32(rcv_nxt, struct tcpcb), |
| VMSTATE_UINT32(rcv_up, struct tcpcb), |
| VMSTATE_UINT32(irs, struct tcpcb), |
| VMSTATE_UINT32(rcv_adv, struct tcpcb), |
| VMSTATE_UINT32(snd_max, struct tcpcb), |
| VMSTATE_UINT32(snd_cwnd, struct tcpcb), |
| VMSTATE_UINT32(snd_ssthresh, struct tcpcb), |
| VMSTATE_INT16(t_idle, struct tcpcb), |
| VMSTATE_INT16(t_rtt, struct tcpcb), |
| VMSTATE_UINT32(t_rtseq, struct tcpcb), |
| VMSTATE_INT16(t_srtt, struct tcpcb), |
| VMSTATE_INT16(t_rttvar, struct tcpcb), |
| VMSTATE_UINT16(t_rttmin, struct tcpcb), |
| VMSTATE_UINT32(max_sndwnd, struct tcpcb), |
| VMSTATE_UINT8(t_oobflags, struct tcpcb), |
| VMSTATE_UINT8(t_iobc, struct tcpcb), |
| VMSTATE_INT16(t_softerror, struct tcpcb), |
| VMSTATE_UINT8(snd_scale, struct tcpcb), |
| VMSTATE_UINT8(rcv_scale, struct tcpcb), |
| VMSTATE_UINT8(request_r_scale, struct tcpcb), |
| VMSTATE_UINT8(requested_s_scale, struct tcpcb), |
| VMSTATE_UINT32(ts_recent, struct tcpcb), |
| VMSTATE_UINT32(ts_recent_age, struct tcpcb), |
| VMSTATE_UINT32(last_ack_sent, struct tcpcb), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| /* The sbuf has a pair of pointers that are migrated as offsets; |
| * we calculate the offsets and restore the pointers using |
| * pre_save/post_load on a tmp structure. |
| */ |
| struct sbuf_tmp { |
| struct sbuf *parent; |
| uint32_t roff, woff; |
| }; |
| |
| static int sbuf_tmp_pre_save(void *opaque) |
| { |
| struct sbuf_tmp *tmp = opaque; |
| tmp->woff = tmp->parent->sb_wptr - tmp->parent->sb_data; |
| tmp->roff = tmp->parent->sb_rptr - tmp->parent->sb_data; |
| |
| return 0; |
| } |
| |
| static int sbuf_tmp_post_load(void *opaque, int version) |
| { |
| struct sbuf_tmp *tmp = opaque; |
| uint32_t requested_len = tmp->parent->sb_datalen; |
| |
| /* Allocate the buffer space used by the field after the tmp */ |
| sbreserve(tmp->parent, tmp->parent->sb_datalen); |
| |
| if (tmp->parent->sb_datalen != requested_len) { |
| return -ENOMEM; |
| } |
| if (tmp->woff >= requested_len || |
| tmp->roff >= requested_len) { |
| g_critical("invalid sbuf offsets r/w=%u/%u len=%u", |
| tmp->roff, tmp->woff, requested_len); |
| return -EINVAL; |
| } |
| |
| tmp->parent->sb_wptr = tmp->parent->sb_data + tmp->woff; |
| tmp->parent->sb_rptr = tmp->parent->sb_data + tmp->roff; |
| |
| return 0; |
| } |
| |
| |
| static const VMStateDescription vmstate_slirp_sbuf_tmp = { |
| .name = "slirp-sbuf-tmp", |
| .post_load = sbuf_tmp_post_load, |
| .pre_save = sbuf_tmp_pre_save, |
| .version_id = 0, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(woff, struct sbuf_tmp), |
| VMSTATE_UINT32(roff, struct sbuf_tmp), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static const VMStateDescription vmstate_slirp_sbuf = { |
| .name = "slirp-sbuf", |
| .version_id = 0, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(sb_cc, struct sbuf), |
| VMSTATE_UINT32(sb_datalen, struct sbuf), |
| VMSTATE_WITH_TMP(struct sbuf, struct sbuf_tmp, vmstate_slirp_sbuf_tmp), |
| VMSTATE_VBUFFER_UINT32(sb_data, struct sbuf, 0, NULL, sb_datalen), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static bool slirp_older_than_v4(void *opaque, int version_id) |
| { |
| return version_id < 4; |
| } |
| |
| static bool slirp_family_inet(void *opaque, int version_id) |
| { |
| union slirp_sockaddr *ssa = (union slirp_sockaddr *)opaque; |
| return ssa->ss.ss_family == AF_INET; |
| } |
| |
| static int slirp_socket_pre_load(void *opaque) |
| { |
| struct socket *so = opaque; |
| if (tcp_attach(so) < 0) { |
| return -ENOMEM; |
| } |
| /* Older versions don't load these fields */ |
| so->so_ffamily = AF_INET; |
| so->so_lfamily = AF_INET; |
| return 0; |
| } |
| |
| #ifndef _WIN32 |
| #define VMSTATE_SIN4_ADDR(f, s, t) VMSTATE_UINT32_TEST(f, s, t) |
| #else |
| /* Win uses u_long rather than uint32_t - but it's still 32bits long */ |
| #define VMSTATE_SIN4_ADDR(f, s, t) VMSTATE_SINGLE_TEST(f, s, t, 0, \ |
| vmstate_info_uint32, u_long) |
| #endif |
| |
| /* The OS provided ss_family field isn't that portable; it's size |
| * and type varies (16/8 bit, signed, unsigned) |
| * and the values it contains aren't fully portable. |
| */ |
| typedef struct SS_FamilyTmpStruct { |
| union slirp_sockaddr *parent; |
| uint16_t portable_family; |
| } SS_FamilyTmpStruct; |
| |
| #define SS_FAMILY_MIG_IPV4 2 /* Linux, BSD, Win... */ |
| #define SS_FAMILY_MIG_IPV6 10 /* Linux */ |
| #define SS_FAMILY_MIG_OTHER 0xffff |
| |
| static int ss_family_pre_save(void *opaque) |
| { |
| SS_FamilyTmpStruct *tss = opaque; |
| |
| tss->portable_family = SS_FAMILY_MIG_OTHER; |
| |
| if (tss->parent->ss.ss_family == AF_INET) { |
| tss->portable_family = SS_FAMILY_MIG_IPV4; |
| } else if (tss->parent->ss.ss_family == AF_INET6) { |
| tss->portable_family = SS_FAMILY_MIG_IPV6; |
| } |
| |
| return 0; |
| } |
| |
| static int ss_family_post_load(void *opaque, int version_id) |
| { |
| SS_FamilyTmpStruct *tss = opaque; |
| |
| switch (tss->portable_family) { |
| case SS_FAMILY_MIG_IPV4: |
| tss->parent->ss.ss_family = AF_INET; |
| break; |
| case SS_FAMILY_MIG_IPV6: |
| case 23: /* compatibility: AF_INET6 from mingw */ |
| case 28: /* compatibility: AF_INET6 from FreeBSD sys/socket.h */ |
| tss->parent->ss.ss_family = AF_INET6; |
| break; |
| default: |
| g_critical("invalid ss_family type %x", tss->portable_family); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static const VMStateDescription vmstate_slirp_ss_family = { |
| .name = "slirp-socket-addr/ss_family", |
| .pre_save = ss_family_pre_save, |
| .post_load = ss_family_post_load, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT16(portable_family, SS_FamilyTmpStruct), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static const VMStateDescription vmstate_slirp_socket_addr = { |
| .name = "slirp-socket-addr", |
| .version_id = 4, |
| .fields = (VMStateField[]) { |
| VMSTATE_WITH_TMP(union slirp_sockaddr, SS_FamilyTmpStruct, |
| vmstate_slirp_ss_family), |
| VMSTATE_SIN4_ADDR(sin.sin_addr.s_addr, union slirp_sockaddr, |
| slirp_family_inet), |
| VMSTATE_UINT16_TEST(sin.sin_port, union slirp_sockaddr, |
| slirp_family_inet), |
| |
| #if 0 |
| /* Untested: Needs checking by someone with IPv6 test */ |
| VMSTATE_BUFFER_TEST(sin6.sin6_addr, union slirp_sockaddr, |
| slirp_family_inet6), |
| VMSTATE_UINT16_TEST(sin6.sin6_port, union slirp_sockaddr, |
| slirp_family_inet6), |
| VMSTATE_UINT32_TEST(sin6.sin6_flowinfo, union slirp_sockaddr, |
| slirp_family_inet6), |
| VMSTATE_UINT32_TEST(sin6.sin6_scope_id, union slirp_sockaddr, |
| slirp_family_inet6), |
| #endif |
| |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static const VMStateDescription vmstate_slirp_socket = { |
| .name = "slirp-socket", |
| .version_id = 4, |
| .pre_load = slirp_socket_pre_load, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(so_urgc, struct socket), |
| /* Pre-v4 versions */ |
| VMSTATE_SIN4_ADDR(so_faddr.s_addr, struct socket, |
| slirp_older_than_v4), |
| VMSTATE_SIN4_ADDR(so_laddr.s_addr, struct socket, |
| slirp_older_than_v4), |
| VMSTATE_UINT16_TEST(so_fport, struct socket, slirp_older_than_v4), |
| VMSTATE_UINT16_TEST(so_lport, struct socket, slirp_older_than_v4), |
| /* v4 and newer */ |
| VMSTATE_STRUCT(fhost, struct socket, 4, vmstate_slirp_socket_addr, |
| union slirp_sockaddr), |
| VMSTATE_STRUCT(lhost, struct socket, 4, vmstate_slirp_socket_addr, |
| union slirp_sockaddr), |
| |
| VMSTATE_UINT8(so_iptos, struct socket), |
| VMSTATE_UINT8(so_emu, struct socket), |
| VMSTATE_UINT8(so_type, struct socket), |
| VMSTATE_INT32(so_state, struct socket), |
| VMSTATE_STRUCT(so_rcv, struct socket, 0, vmstate_slirp_sbuf, |
| struct sbuf), |
| VMSTATE_STRUCT(so_snd, struct socket, 0, vmstate_slirp_sbuf, |
| struct sbuf), |
| VMSTATE_STRUCT_POINTER(so_tcpcb, struct socket, vmstate_slirp_tcp, |
| struct tcpcb), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static const VMStateDescription vmstate_slirp_bootp_client = { |
| .name = "slirp_bootpclient", |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT16(allocated, BOOTPClient), |
| VMSTATE_BUFFER(macaddr, BOOTPClient), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static const VMStateDescription vmstate_slirp = { |
| .name = "slirp", |
| .version_id = 4, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT16_V(ip_id, Slirp, 2), |
| VMSTATE_STRUCT_ARRAY(bootp_clients, Slirp, NB_BOOTP_CLIENTS, 3, |
| vmstate_slirp_bootp_client, BOOTPClient), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static void slirp_state_save(QEMUFile *f, void *opaque) |
| { |
| Slirp *slirp = opaque; |
| struct gfwd_list *ex_ptr; |
| |
| for (ex_ptr = slirp->guestfwd_list; ex_ptr; ex_ptr = ex_ptr->ex_next) |
| if (ex_ptr->write_cb) { |
| struct socket *so; |
| so = slirp_find_ctl_socket(slirp, ex_ptr->ex_addr, |
| ntohs(ex_ptr->ex_fport)); |
| if (!so) { |
| continue; |
| } |
| |
| qemu_put_byte(f, 42); |
| vmstate_save_state(f, &vmstate_slirp_socket, so, NULL); |
| } |
| qemu_put_byte(f, 0); |
| |
| vmstate_save_state(f, &vmstate_slirp, slirp, NULL); |
| } |
| |
| |
| static int slirp_state_load(QEMUFile *f, void *opaque, int version_id) |
| { |
| Slirp *slirp = opaque; |
| struct gfwd_list *ex_ptr; |
| |
| while (qemu_get_byte(f)) { |
| int ret; |
| struct socket *so = socreate(slirp); |
| |
| ret = vmstate_load_state(f, &vmstate_slirp_socket, so, version_id); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) != |
| slirp->vnetwork_addr.s_addr) { |
| return -EINVAL; |
| } |
| for (ex_ptr = slirp->guestfwd_list; ex_ptr; ex_ptr = ex_ptr->ex_next) { |
| if (ex_ptr->write_cb && |
| so->so_faddr.s_addr == ex_ptr->ex_addr.s_addr && |
| so->so_fport == ex_ptr->ex_fport) { |
| break; |
| } |
| } |
| if (!ex_ptr) { |
| return -EINVAL; |
| } |
| } |
| |
| return vmstate_load_state(f, &vmstate_slirp, slirp, version_id); |
| } |
| |
| void slirp_state_register(Slirp *slirp) |
| { |
| static SaveVMHandlers savevm_slirp_state = { |
| .save_state = slirp_state_save, |
| .load_state = slirp_state_load, |
| }; |
| |
| register_savevm_live(NULL, "slirp", 0, 4, &savevm_slirp_state, slirp); |
| } |
| |
| void slirp_state_unregister(Slirp *slirp) |
| { |
| unregister_savevm(NULL, "slirp", slirp); |
| } |
