Now that socreate() can never fail, we can remove the code that was trying to handle that situation. In particular this removes code in tcp_connect() that provoked Coverity to complain (CID 1005724): in closesocket(accept(inso->s, (struct sockaddr *)&addr, &addrlen)); if the accept() call fails then we pass closesocket() -1 instead of a valid file descriptor. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
1504 lines
46 KiB
C
1504 lines
46 KiB
C
/*
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* libslirp glue
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*
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* Copyright (c) 2004-2008 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 "qemu/osdep.h"
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#include "qemu-common.h"
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#include "qemu/timer.h"
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#include "qemu/error-report.h"
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#include "chardev/char-fe.h"
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#include "migration/register.h"
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#include "slirp.h"
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#include "hw/hw.h"
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#include "qemu/cutils.h"
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#ifndef _WIN32
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#include <net/if.h>
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#endif
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/* host loopback address */
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struct in_addr loopback_addr;
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/* host loopback network mask */
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unsigned long loopback_mask;
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/* emulated hosts use the MAC addr 52:55:IP:IP:IP:IP */
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static const uint8_t special_ethaddr[ETH_ALEN] = {
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0x52, 0x55, 0x00, 0x00, 0x00, 0x00
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};
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u_int curtime;
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static QTAILQ_HEAD(slirp_instances, Slirp) slirp_instances =
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QTAILQ_HEAD_INITIALIZER(slirp_instances);
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static struct in_addr dns_addr;
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#ifndef _WIN32
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static struct in6_addr dns6_addr;
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#endif
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static u_int dns_addr_time;
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#ifndef _WIN32
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static u_int dns6_addr_time;
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#endif
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#define TIMEOUT_FAST 2 /* milliseconds */
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#define TIMEOUT_SLOW 499 /* milliseconds */
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/* for the aging of certain requests like DNS */
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#define TIMEOUT_DEFAULT 1000 /* milliseconds */
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#ifdef _WIN32
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int get_dns_addr(struct in_addr *pdns_addr)
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{
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FIXED_INFO *FixedInfo=NULL;
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ULONG BufLen;
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DWORD ret;
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IP_ADDR_STRING *pIPAddr;
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struct in_addr tmp_addr;
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if (dns_addr.s_addr != 0 && (curtime - dns_addr_time) < TIMEOUT_DEFAULT) {
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*pdns_addr = dns_addr;
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return 0;
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}
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FixedInfo = (FIXED_INFO *)GlobalAlloc(GPTR, sizeof(FIXED_INFO));
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BufLen = sizeof(FIXED_INFO);
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if (ERROR_BUFFER_OVERFLOW == GetNetworkParams(FixedInfo, &BufLen)) {
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if (FixedInfo) {
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GlobalFree(FixedInfo);
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FixedInfo = NULL;
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}
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FixedInfo = GlobalAlloc(GPTR, BufLen);
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}
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if ((ret = GetNetworkParams(FixedInfo, &BufLen)) != ERROR_SUCCESS) {
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printf("GetNetworkParams failed. ret = %08x\n", (u_int)ret );
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if (FixedInfo) {
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GlobalFree(FixedInfo);
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FixedInfo = NULL;
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}
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return -1;
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}
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pIPAddr = &(FixedInfo->DnsServerList);
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inet_aton(pIPAddr->IpAddress.String, &tmp_addr);
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*pdns_addr = tmp_addr;
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dns_addr = tmp_addr;
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dns_addr_time = curtime;
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if (FixedInfo) {
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GlobalFree(FixedInfo);
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FixedInfo = NULL;
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}
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return 0;
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}
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int get_dns6_addr(struct in6_addr *pdns6_addr, uint32_t *scope_id)
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{
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return -1;
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}
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static void winsock_cleanup(void)
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{
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WSACleanup();
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}
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#else
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static int get_dns_addr_cached(void *pdns_addr, void *cached_addr,
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socklen_t addrlen,
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struct stat *cached_stat, u_int *cached_time)
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{
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struct stat old_stat;
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if (curtime - *cached_time < TIMEOUT_DEFAULT) {
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memcpy(pdns_addr, cached_addr, addrlen);
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return 0;
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}
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old_stat = *cached_stat;
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if (stat("/etc/resolv.conf", cached_stat) != 0) {
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return -1;
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}
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if (cached_stat->st_dev == old_stat.st_dev
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&& cached_stat->st_ino == old_stat.st_ino
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&& cached_stat->st_size == old_stat.st_size
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&& cached_stat->st_mtime == old_stat.st_mtime) {
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memcpy(pdns_addr, cached_addr, addrlen);
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return 0;
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}
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return 1;
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}
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static int get_dns_addr_resolv_conf(int af, void *pdns_addr, void *cached_addr,
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socklen_t addrlen, uint32_t *scope_id,
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u_int *cached_time)
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{
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char buff[512];
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char buff2[257];
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FILE *f;
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int found = 0;
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void *tmp_addr = alloca(addrlen);
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unsigned if_index;
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f = fopen("/etc/resolv.conf", "r");
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if (!f)
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return -1;
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#ifdef DEBUG
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fprintf(stderr, "IP address of your DNS(s): ");
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#endif
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while (fgets(buff, 512, f) != NULL) {
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if (sscanf(buff, "nameserver%*[ \t]%256s", buff2) == 1) {
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char *c = strchr(buff2, '%');
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if (c) {
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if_index = if_nametoindex(c + 1);
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*c = '\0';
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} else {
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if_index = 0;
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}
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if (!inet_pton(af, buff2, tmp_addr)) {
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continue;
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}
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/* If it's the first one, set it to dns_addr */
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if (!found) {
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memcpy(pdns_addr, tmp_addr, addrlen);
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memcpy(cached_addr, tmp_addr, addrlen);
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if (scope_id) {
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*scope_id = if_index;
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}
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*cached_time = curtime;
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}
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#ifdef DEBUG
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else
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fprintf(stderr, ", ");
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#endif
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if (++found > 3) {
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#ifdef DEBUG
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fprintf(stderr, "(more)");
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#endif
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break;
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}
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#ifdef DEBUG
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else {
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char s[INET6_ADDRSTRLEN];
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const char *res = inet_ntop(af, tmp_addr, s, sizeof(s));
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if (!res) {
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res = "(string conversion error)";
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}
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fprintf(stderr, "%s", res);
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}
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#endif
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}
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}
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fclose(f);
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if (!found)
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return -1;
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return 0;
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}
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int get_dns_addr(struct in_addr *pdns_addr)
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{
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static struct stat dns_addr_stat;
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if (dns_addr.s_addr != 0) {
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int ret;
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ret = get_dns_addr_cached(pdns_addr, &dns_addr, sizeof(dns_addr),
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&dns_addr_stat, &dns_addr_time);
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if (ret <= 0) {
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return ret;
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}
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}
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return get_dns_addr_resolv_conf(AF_INET, pdns_addr, &dns_addr,
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sizeof(dns_addr), NULL, &dns_addr_time);
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}
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int get_dns6_addr(struct in6_addr *pdns6_addr, uint32_t *scope_id)
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{
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static struct stat dns6_addr_stat;
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if (!in6_zero(&dns6_addr)) {
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int ret;
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ret = get_dns_addr_cached(pdns6_addr, &dns6_addr, sizeof(dns6_addr),
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&dns6_addr_stat, &dns6_addr_time);
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if (ret <= 0) {
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return ret;
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}
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}
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return get_dns_addr_resolv_conf(AF_INET6, pdns6_addr, &dns6_addr,
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sizeof(dns6_addr),
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scope_id, &dns6_addr_time);
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}
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#endif
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static void slirp_init_once(void)
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{
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static int initialized;
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#ifdef _WIN32
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WSADATA Data;
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#endif
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if (initialized) {
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return;
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}
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initialized = 1;
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#ifdef _WIN32
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WSAStartup(MAKEWORD(2,0), &Data);
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atexit(winsock_cleanup);
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#endif
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loopback_addr.s_addr = htonl(INADDR_LOOPBACK);
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loopback_mask = htonl(IN_CLASSA_NET);
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}
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static void slirp_state_save(QEMUFile *f, void *opaque);
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static int slirp_state_load(QEMUFile *f, void *opaque, int version_id);
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static SaveVMHandlers savevm_slirp_state = {
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.save_state = slirp_state_save,
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.load_state = slirp_state_load,
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};
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Slirp *slirp_init(int restricted, bool in_enabled, struct in_addr vnetwork,
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struct in_addr vnetmask, struct in_addr vhost,
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bool in6_enabled,
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struct in6_addr vprefix_addr6, uint8_t vprefix_len,
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struct in6_addr vhost6, const char *vhostname,
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const char *tftp_server_name,
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const char *tftp_path, const char *bootfile,
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struct in_addr vdhcp_start, struct in_addr vnameserver,
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struct in6_addr vnameserver6, const char **vdnssearch,
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const char *vdomainname, void *opaque)
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{
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Slirp *slirp = g_malloc0(sizeof(Slirp));
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slirp_init_once();
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slirp->grand = g_rand_new();
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slirp->restricted = restricted;
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slirp->in_enabled = in_enabled;
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slirp->in6_enabled = in6_enabled;
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if_init(slirp);
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ip_init(slirp);
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ip6_init(slirp);
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/* Initialise mbufs *after* setting the MTU */
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m_init(slirp);
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slirp->vnetwork_addr = vnetwork;
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slirp->vnetwork_mask = vnetmask;
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slirp->vhost_addr = vhost;
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slirp->vprefix_addr6 = vprefix_addr6;
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slirp->vprefix_len = vprefix_len;
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slirp->vhost_addr6 = vhost6;
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if (vhostname) {
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pstrcpy(slirp->client_hostname, sizeof(slirp->client_hostname),
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vhostname);
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}
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slirp->tftp_prefix = g_strdup(tftp_path);
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slirp->bootp_filename = g_strdup(bootfile);
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slirp->vdomainname = g_strdup(vdomainname);
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slirp->vdhcp_startaddr = vdhcp_start;
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slirp->vnameserver_addr = vnameserver;
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slirp->vnameserver_addr6 = vnameserver6;
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slirp->tftp_server_name = g_strdup(tftp_server_name);
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if (vdnssearch) {
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translate_dnssearch(slirp, vdnssearch);
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}
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slirp->opaque = opaque;
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register_savevm_live(NULL, "slirp", 0, 4, &savevm_slirp_state, slirp);
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QTAILQ_INSERT_TAIL(&slirp_instances, slirp, entry);
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return slirp;
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}
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void slirp_cleanup(Slirp *slirp)
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{
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QTAILQ_REMOVE(&slirp_instances, slirp, entry);
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unregister_savevm(NULL, "slirp", slirp);
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ip_cleanup(slirp);
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ip6_cleanup(slirp);
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m_cleanup(slirp);
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g_rand_free(slirp->grand);
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g_free(slirp->vdnssearch);
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g_free(slirp->tftp_prefix);
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g_free(slirp->bootp_filename);
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g_free(slirp->vdomainname);
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g_free(slirp);
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}
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#define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
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#define CONN_CANFRCV(so) (((so)->so_state & (SS_FCANTRCVMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
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static void slirp_update_timeout(uint32_t *timeout)
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{
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Slirp *slirp;
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uint32_t t;
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if (*timeout <= TIMEOUT_FAST) {
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return;
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}
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t = MIN(1000, *timeout);
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/* If we have tcp timeout with slirp, then we will fill @timeout with
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* more precise value.
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*/
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QTAILQ_FOREACH(slirp, &slirp_instances, entry) {
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if (slirp->time_fasttimo) {
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*timeout = TIMEOUT_FAST;
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return;
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}
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if (slirp->do_slowtimo) {
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t = MIN(TIMEOUT_SLOW, t);
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}
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}
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*timeout = t;
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}
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|
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void slirp_pollfds_fill(GArray *pollfds, uint32_t *timeout)
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{
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Slirp *slirp;
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struct socket *so, *so_next;
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|
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if (QTAILQ_EMPTY(&slirp_instances)) {
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return;
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}
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/*
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* First, TCP sockets
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*/
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QTAILQ_FOREACH(slirp, &slirp_instances, entry) {
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/*
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* *_slowtimo needs calling if there are IP fragments
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* in the fragment queue, or there are TCP connections active
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*/
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slirp->do_slowtimo = ((slirp->tcb.so_next != &slirp->tcb) ||
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(&slirp->ipq.ip_link != slirp->ipq.ip_link.next));
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for (so = slirp->tcb.so_next; so != &slirp->tcb;
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so = so_next) {
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int events = 0;
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so_next = so->so_next;
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|
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so->pollfds_idx = -1;
|
|
|
|
/*
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|
* See if we need a tcp_fasttimo
|
|
*/
|
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if (slirp->time_fasttimo == 0 &&
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so->so_tcpcb->t_flags & TF_DELACK) {
|
|
slirp->time_fasttimo = curtime; /* Flag when want a fasttimo */
|
|
}
|
|
|
|
/*
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|
* NOFDREF can include still connecting to local-host,
|
|
* newly socreated() sockets etc. Don't want to select these.
|
|
*/
|
|
if (so->so_state & SS_NOFDREF || so->s == -1) {
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|
continue;
|
|
}
|
|
|
|
/*
|
|
* Set for reading sockets which are accepting
|
|
*/
|
|
if (so->so_state & SS_FACCEPTCONN) {
|
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GPollFD pfd = {
|
|
.fd = so->s,
|
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.events = G_IO_IN | G_IO_HUP | G_IO_ERR,
|
|
};
|
|
so->pollfds_idx = pollfds->len;
|
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g_array_append_val(pollfds, pfd);
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continue;
|
|
}
|
|
|
|
/*
|
|
* Set for writing sockets which are connecting
|
|
*/
|
|
if (so->so_state & SS_ISFCONNECTING) {
|
|
GPollFD pfd = {
|
|
.fd = so->s,
|
|
.events = G_IO_OUT | G_IO_ERR,
|
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};
|
|
so->pollfds_idx = pollfds->len;
|
|
g_array_append_val(pollfds, pfd);
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|
continue;
|
|
}
|
|
|
|
/*
|
|
* Set for writing if we are connected, can send more, and
|
|
* we have something to send
|
|
*/
|
|
if (CONN_CANFSEND(so) && so->so_rcv.sb_cc) {
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|
events |= G_IO_OUT | G_IO_ERR;
|
|
}
|
|
|
|
/*
|
|
* Set for reading (and urgent data) if we are connected, can
|
|
* receive more, and we have room for it XXX /2 ?
|
|
*/
|
|
if (CONN_CANFRCV(so) &&
|
|
(so->so_snd.sb_cc < (so->so_snd.sb_datalen/2))) {
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events |= G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_PRI;
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}
|
|
|
|
if (events) {
|
|
GPollFD pfd = {
|
|
.fd = so->s,
|
|
.events = events,
|
|
};
|
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so->pollfds_idx = pollfds->len;
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g_array_append_val(pollfds, pfd);
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}
|
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}
|
|
|
|
/*
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|
* UDP sockets
|
|
*/
|
|
for (so = slirp->udb.so_next; so != &slirp->udb;
|
|
so = so_next) {
|
|
so_next = so->so_next;
|
|
|
|
so->pollfds_idx = -1;
|
|
|
|
/*
|
|
* See if it's timed out
|
|
*/
|
|
if (so->so_expire) {
|
|
if (so->so_expire <= curtime) {
|
|
udp_detach(so);
|
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continue;
|
|
} else {
|
|
slirp->do_slowtimo = true; /* Let socket expire */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* When UDP packets are received from over the
|
|
* link, they're sendto()'d straight away, so
|
|
* no need for setting for writing
|
|
* Limit the number of packets queued by this session
|
|
* to 4. Note that even though we try and limit this
|
|
* to 4 packets, the session could have more queued
|
|
* if the packets needed to be fragmented
|
|
* (XXX <= 4 ?)
|
|
*/
|
|
if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4) {
|
|
GPollFD pfd = {
|
|
.fd = so->s,
|
|
.events = G_IO_IN | G_IO_HUP | G_IO_ERR,
|
|
};
|
|
so->pollfds_idx = pollfds->len;
|
|
g_array_append_val(pollfds, pfd);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* ICMP sockets
|
|
*/
|
|
for (so = slirp->icmp.so_next; so != &slirp->icmp;
|
|
so = so_next) {
|
|
so_next = so->so_next;
|
|
|
|
so->pollfds_idx = -1;
|
|
|
|
/*
|
|
* See if it's timed out
|
|
*/
|
|
if (so->so_expire) {
|
|
if (so->so_expire <= curtime) {
|
|
icmp_detach(so);
|
|
continue;
|
|
} else {
|
|
slirp->do_slowtimo = true; /* Let socket expire */
|
|
}
|
|
}
|
|
|
|
if (so->so_state & SS_ISFCONNECTED) {
|
|
GPollFD pfd = {
|
|
.fd = so->s,
|
|
.events = G_IO_IN | G_IO_HUP | G_IO_ERR,
|
|
};
|
|
so->pollfds_idx = pollfds->len;
|
|
g_array_append_val(pollfds, pfd);
|
|
}
|
|
}
|
|
}
|
|
slirp_update_timeout(timeout);
|
|
}
|
|
|
|
void slirp_pollfds_poll(GArray *pollfds, int select_error)
|
|
{
|
|
Slirp *slirp;
|
|
struct socket *so, *so_next;
|
|
int ret;
|
|
|
|
if (QTAILQ_EMPTY(&slirp_instances)) {
|
|
return;
|
|
}
|
|
|
|
curtime = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
|
|
|
|
QTAILQ_FOREACH(slirp, &slirp_instances, entry) {
|
|
/*
|
|
* See if anything has timed out
|
|
*/
|
|
if (slirp->time_fasttimo &&
|
|
((curtime - slirp->time_fasttimo) >= TIMEOUT_FAST)) {
|
|
tcp_fasttimo(slirp);
|
|
slirp->time_fasttimo = 0;
|
|
}
|
|
if (slirp->do_slowtimo &&
|
|
((curtime - slirp->last_slowtimo) >= TIMEOUT_SLOW)) {
|
|
ip_slowtimo(slirp);
|
|
tcp_slowtimo(slirp);
|
|
slirp->last_slowtimo = curtime;
|
|
}
|
|
|
|
/*
|
|
* Check sockets
|
|
*/
|
|
if (!select_error) {
|
|
/*
|
|
* Check TCP sockets
|
|
*/
|
|
for (so = slirp->tcb.so_next; so != &slirp->tcb;
|
|
so = so_next) {
|
|
int revents;
|
|
|
|
so_next = so->so_next;
|
|
|
|
revents = 0;
|
|
if (so->pollfds_idx != -1) {
|
|
revents = g_array_index(pollfds, GPollFD,
|
|
so->pollfds_idx).revents;
|
|
}
|
|
|
|
if (so->so_state & SS_NOFDREF || so->s == -1) {
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Check for URG data
|
|
* This will soread as well, so no need to
|
|
* test for G_IO_IN below if this succeeds
|
|
*/
|
|
if (revents & G_IO_PRI) {
|
|
ret = sorecvoob(so);
|
|
if (ret < 0) {
|
|
/* Socket error might have resulted in the socket being
|
|
* removed, do not try to do anything more with it. */
|
|
continue;
|
|
}
|
|
}
|
|
/*
|
|
* Check sockets for reading
|
|
*/
|
|
else if (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR)) {
|
|
/*
|
|
* Check for incoming connections
|
|
*/
|
|
if (so->so_state & SS_FACCEPTCONN) {
|
|
tcp_connect(so);
|
|
continue;
|
|
} /* else */
|
|
ret = soread(so);
|
|
|
|
/* Output it if we read something */
|
|
if (ret > 0) {
|
|
tcp_output(sototcpcb(so));
|
|
}
|
|
if (ret < 0) {
|
|
/* Socket error might have resulted in the socket being
|
|
* removed, do not try to do anything more with it. */
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check sockets for writing
|
|
*/
|
|
if (!(so->so_state & SS_NOFDREF) &&
|
|
(revents & (G_IO_OUT | G_IO_ERR))) {
|
|
/*
|
|
* Check for non-blocking, still-connecting sockets
|
|
*/
|
|
if (so->so_state & SS_ISFCONNECTING) {
|
|
/* Connected */
|
|
so->so_state &= ~SS_ISFCONNECTING;
|
|
|
|
ret = send(so->s, (const void *) &ret, 0, 0);
|
|
if (ret < 0) {
|
|
/* XXXXX Must fix, zero bytes is a NOP */
|
|
if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
|
errno == EINPROGRESS || errno == ENOTCONN) {
|
|
continue;
|
|
}
|
|
|
|
/* else failed */
|
|
so->so_state &= SS_PERSISTENT_MASK;
|
|
so->so_state |= SS_NOFDREF;
|
|
}
|
|
/* else so->so_state &= ~SS_ISFCONNECTING; */
|
|
|
|
/*
|
|
* Continue tcp_input
|
|
*/
|
|
tcp_input((struct mbuf *)NULL, sizeof(struct ip), so,
|
|
so->so_ffamily);
|
|
/* continue; */
|
|
} else {
|
|
ret = sowrite(so);
|
|
if (ret > 0) {
|
|
/* Call tcp_output in case we need to send a window
|
|
* update to the guest, otherwise it will be stuck
|
|
* until it sends a window probe. */
|
|
tcp_output(sototcpcb(so));
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Probe a still-connecting, non-blocking socket
|
|
* to check if it's still alive
|
|
*/
|
|
#ifdef PROBE_CONN
|
|
if (so->so_state & SS_ISFCONNECTING) {
|
|
ret = qemu_recv(so->s, &ret, 0, 0);
|
|
|
|
if (ret < 0) {
|
|
/* XXX */
|
|
if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
|
errno == EINPROGRESS || errno == ENOTCONN) {
|
|
continue; /* Still connecting, continue */
|
|
}
|
|
|
|
/* else failed */
|
|
so->so_state &= SS_PERSISTENT_MASK;
|
|
so->so_state |= SS_NOFDREF;
|
|
|
|
/* tcp_input will take care of it */
|
|
} else {
|
|
ret = send(so->s, &ret, 0, 0);
|
|
if (ret < 0) {
|
|
/* XXX */
|
|
if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
|
errno == EINPROGRESS || errno == ENOTCONN) {
|
|
continue;
|
|
}
|
|
/* else failed */
|
|
so->so_state &= SS_PERSISTENT_MASK;
|
|
so->so_state |= SS_NOFDREF;
|
|
} else {
|
|
so->so_state &= ~SS_ISFCONNECTING;
|
|
}
|
|
|
|
}
|
|
tcp_input((struct mbuf *)NULL, sizeof(struct ip), so,
|
|
so->so_ffamily);
|
|
} /* SS_ISFCONNECTING */
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Now UDP sockets.
|
|
* Incoming packets are sent straight away, they're not buffered.
|
|
* Incoming UDP data isn't buffered either.
|
|
*/
|
|
for (so = slirp->udb.so_next; so != &slirp->udb;
|
|
so = so_next) {
|
|
int revents;
|
|
|
|
so_next = so->so_next;
|
|
|
|
revents = 0;
|
|
if (so->pollfds_idx != -1) {
|
|
revents = g_array_index(pollfds, GPollFD,
|
|
so->pollfds_idx).revents;
|
|
}
|
|
|
|
if (so->s != -1 &&
|
|
(revents & (G_IO_IN | G_IO_HUP | G_IO_ERR))) {
|
|
sorecvfrom(so);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check incoming ICMP relies.
|
|
*/
|
|
for (so = slirp->icmp.so_next; so != &slirp->icmp;
|
|
so = so_next) {
|
|
int revents;
|
|
|
|
so_next = so->so_next;
|
|
|
|
revents = 0;
|
|
if (so->pollfds_idx != -1) {
|
|
revents = g_array_index(pollfds, GPollFD,
|
|
so->pollfds_idx).revents;
|
|
}
|
|
|
|
if (so->s != -1 &&
|
|
(revents & (G_IO_IN | G_IO_HUP | G_IO_ERR))) {
|
|
icmp_receive(so);
|
|
}
|
|
}
|
|
}
|
|
|
|
if_start(slirp);
|
|
}
|
|
}
|
|
|
|
static void arp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len)
|
|
{
|
|
struct slirp_arphdr *ah = (struct slirp_arphdr *)(pkt + ETH_HLEN);
|
|
uint8_t arp_reply[MAX(ETH_HLEN + sizeof(struct slirp_arphdr), 64)];
|
|
struct ethhdr *reh = (struct ethhdr *)arp_reply;
|
|
struct slirp_arphdr *rah = (struct slirp_arphdr *)(arp_reply + ETH_HLEN);
|
|
int ar_op;
|
|
struct ex_list *ex_ptr;
|
|
|
|
if (!slirp->in_enabled) {
|
|
return;
|
|
}
|
|
|
|
ar_op = ntohs(ah->ar_op);
|
|
switch(ar_op) {
|
|
case ARPOP_REQUEST:
|
|
if (ah->ar_tip == ah->ar_sip) {
|
|
/* Gratuitous ARP */
|
|
arp_table_add(slirp, ah->ar_sip, ah->ar_sha);
|
|
return;
|
|
}
|
|
|
|
if ((ah->ar_tip & slirp->vnetwork_mask.s_addr) ==
|
|
slirp->vnetwork_addr.s_addr) {
|
|
if (ah->ar_tip == slirp->vnameserver_addr.s_addr ||
|
|
ah->ar_tip == slirp->vhost_addr.s_addr)
|
|
goto arp_ok;
|
|
for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) {
|
|
if (ex_ptr->ex_addr.s_addr == ah->ar_tip)
|
|
goto arp_ok;
|
|
}
|
|
return;
|
|
arp_ok:
|
|
memset(arp_reply, 0, sizeof(arp_reply));
|
|
|
|
arp_table_add(slirp, ah->ar_sip, ah->ar_sha);
|
|
|
|
/* ARP request for alias/dns mac address */
|
|
memcpy(reh->h_dest, pkt + ETH_ALEN, ETH_ALEN);
|
|
memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 4);
|
|
memcpy(&reh->h_source[2], &ah->ar_tip, 4);
|
|
reh->h_proto = htons(ETH_P_ARP);
|
|
|
|
rah->ar_hrd = htons(1);
|
|
rah->ar_pro = htons(ETH_P_IP);
|
|
rah->ar_hln = ETH_ALEN;
|
|
rah->ar_pln = 4;
|
|
rah->ar_op = htons(ARPOP_REPLY);
|
|
memcpy(rah->ar_sha, reh->h_source, ETH_ALEN);
|
|
rah->ar_sip = ah->ar_tip;
|
|
memcpy(rah->ar_tha, ah->ar_sha, ETH_ALEN);
|
|
rah->ar_tip = ah->ar_sip;
|
|
slirp_output(slirp->opaque, arp_reply, sizeof(arp_reply));
|
|
}
|
|
break;
|
|
case ARPOP_REPLY:
|
|
arp_table_add(slirp, ah->ar_sip, ah->ar_sha);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
void slirp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len)
|
|
{
|
|
struct mbuf *m;
|
|
int proto;
|
|
|
|
if (pkt_len < ETH_HLEN)
|
|
return;
|
|
|
|
proto = ntohs(*(uint16_t *)(pkt + 12));
|
|
switch(proto) {
|
|
case ETH_P_ARP:
|
|
arp_input(slirp, pkt, pkt_len);
|
|
break;
|
|
case ETH_P_IP:
|
|
case ETH_P_IPV6:
|
|
m = m_get(slirp);
|
|
if (!m)
|
|
return;
|
|
/* Note: we add 2 to align the IP header on 4 bytes,
|
|
* and add the margin for the tcpiphdr overhead */
|
|
if (M_FREEROOM(m) < pkt_len + TCPIPHDR_DELTA + 2) {
|
|
m_inc(m, pkt_len + TCPIPHDR_DELTA + 2);
|
|
}
|
|
m->m_len = pkt_len + TCPIPHDR_DELTA + 2;
|
|
memcpy(m->m_data + TCPIPHDR_DELTA + 2, pkt, pkt_len);
|
|
|
|
m->m_data += TCPIPHDR_DELTA + 2 + ETH_HLEN;
|
|
m->m_len -= TCPIPHDR_DELTA + 2 + ETH_HLEN;
|
|
|
|
if (proto == ETH_P_IP) {
|
|
ip_input(m);
|
|
} else if (proto == ETH_P_IPV6) {
|
|
ip6_input(m);
|
|
}
|
|
break;
|
|
|
|
case ETH_P_NCSI:
|
|
ncsi_input(slirp, pkt, pkt_len);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Prepare the IPv4 packet to be sent to the ethernet device. Returns 1 if no
|
|
* packet should be sent, 0 if the packet must be re-queued, 2 if the packet
|
|
* is ready to go.
|
|
*/
|
|
static int if_encap4(Slirp *slirp, struct mbuf *ifm, struct ethhdr *eh,
|
|
uint8_t ethaddr[ETH_ALEN])
|
|
{
|
|
const struct ip *iph = (const struct ip *)ifm->m_data;
|
|
|
|
if (iph->ip_dst.s_addr == 0) {
|
|
/* 0.0.0.0 can not be a destination address, something went wrong,
|
|
* avoid making it worse */
|
|
return 1;
|
|
}
|
|
if (!arp_table_search(slirp, iph->ip_dst.s_addr, ethaddr)) {
|
|
uint8_t arp_req[ETH_HLEN + sizeof(struct slirp_arphdr)];
|
|
struct ethhdr *reh = (struct ethhdr *)arp_req;
|
|
struct slirp_arphdr *rah = (struct slirp_arphdr *)(arp_req + ETH_HLEN);
|
|
|
|
if (!ifm->resolution_requested) {
|
|
/* If the client addr is not known, send an ARP request */
|
|
memset(reh->h_dest, 0xff, ETH_ALEN);
|
|
memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 4);
|
|
memcpy(&reh->h_source[2], &slirp->vhost_addr, 4);
|
|
reh->h_proto = htons(ETH_P_ARP);
|
|
rah->ar_hrd = htons(1);
|
|
rah->ar_pro = htons(ETH_P_IP);
|
|
rah->ar_hln = ETH_ALEN;
|
|
rah->ar_pln = 4;
|
|
rah->ar_op = htons(ARPOP_REQUEST);
|
|
|
|
/* source hw addr */
|
|
memcpy(rah->ar_sha, special_ethaddr, ETH_ALEN - 4);
|
|
memcpy(&rah->ar_sha[2], &slirp->vhost_addr, 4);
|
|
|
|
/* source IP */
|
|
rah->ar_sip = slirp->vhost_addr.s_addr;
|
|
|
|
/* target hw addr (none) */
|
|
memset(rah->ar_tha, 0, ETH_ALEN);
|
|
|
|
/* target IP */
|
|
rah->ar_tip = iph->ip_dst.s_addr;
|
|
slirp->client_ipaddr = iph->ip_dst;
|
|
slirp_output(slirp->opaque, arp_req, sizeof(arp_req));
|
|
ifm->resolution_requested = true;
|
|
|
|
/* Expire request and drop outgoing packet after 1 second */
|
|
ifm->expiration_date = qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + 1000000000ULL;
|
|
}
|
|
return 0;
|
|
} else {
|
|
memcpy(eh->h_source, special_ethaddr, ETH_ALEN - 4);
|
|
/* XXX: not correct */
|
|
memcpy(&eh->h_source[2], &slirp->vhost_addr, 4);
|
|
eh->h_proto = htons(ETH_P_IP);
|
|
|
|
/* Send this */
|
|
return 2;
|
|
}
|
|
}
|
|
|
|
/* Prepare the IPv6 packet to be sent to the ethernet device. Returns 1 if no
|
|
* packet should be sent, 0 if the packet must be re-queued, 2 if the packet
|
|
* is ready to go.
|
|
*/
|
|
static int if_encap6(Slirp *slirp, struct mbuf *ifm, struct ethhdr *eh,
|
|
uint8_t ethaddr[ETH_ALEN])
|
|
{
|
|
const struct ip6 *ip6h = mtod(ifm, const struct ip6 *);
|
|
if (!ndp_table_search(slirp, ip6h->ip_dst, ethaddr)) {
|
|
if (!ifm->resolution_requested) {
|
|
ndp_send_ns(slirp, ip6h->ip_dst);
|
|
ifm->resolution_requested = true;
|
|
ifm->expiration_date =
|
|
qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + 1000000000ULL;
|
|
}
|
|
return 0;
|
|
} else {
|
|
eh->h_proto = htons(ETH_P_IPV6);
|
|
in6_compute_ethaddr(ip6h->ip_src, eh->h_source);
|
|
|
|
/* Send this */
|
|
return 2;
|
|
}
|
|
}
|
|
|
|
/* Output the IP packet to the ethernet device. Returns 0 if the packet must be
|
|
* re-queued.
|
|
*/
|
|
int if_encap(Slirp *slirp, struct mbuf *ifm)
|
|
{
|
|
uint8_t buf[1600];
|
|
struct ethhdr *eh = (struct ethhdr *)buf;
|
|
uint8_t ethaddr[ETH_ALEN];
|
|
const struct ip *iph = (const struct ip *)ifm->m_data;
|
|
int ret;
|
|
|
|
if (ifm->m_len + ETH_HLEN > sizeof(buf)) {
|
|
return 1;
|
|
}
|
|
|
|
switch (iph->ip_v) {
|
|
case IPVERSION:
|
|
ret = if_encap4(slirp, ifm, eh, ethaddr);
|
|
if (ret < 2) {
|
|
return ret;
|
|
}
|
|
break;
|
|
|
|
case IP6VERSION:
|
|
ret = if_encap6(slirp, ifm, eh, ethaddr);
|
|
if (ret < 2) {
|
|
return ret;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
break;
|
|
}
|
|
|
|
memcpy(eh->h_dest, ethaddr, ETH_ALEN);
|
|
DEBUG_ARGS((dfd, " src = %02x:%02x:%02x:%02x:%02x:%02x\n",
|
|
eh->h_source[0], eh->h_source[1], eh->h_source[2],
|
|
eh->h_source[3], eh->h_source[4], eh->h_source[5]));
|
|
DEBUG_ARGS((dfd, " dst = %02x:%02x:%02x:%02x:%02x:%02x\n",
|
|
eh->h_dest[0], eh->h_dest[1], eh->h_dest[2],
|
|
eh->h_dest[3], eh->h_dest[4], eh->h_dest[5]));
|
|
memcpy(buf + sizeof(struct ethhdr), ifm->m_data, ifm->m_len);
|
|
slirp_output(slirp->opaque, buf, ifm->m_len + ETH_HLEN);
|
|
return 1;
|
|
}
|
|
|
|
/* Drop host forwarding rule, return 0 if found. */
|
|
int slirp_remove_hostfwd(Slirp *slirp, int is_udp, struct in_addr host_addr,
|
|
int host_port)
|
|
{
|
|
struct socket *so;
|
|
struct socket *head = (is_udp ? &slirp->udb : &slirp->tcb);
|
|
struct sockaddr_in addr;
|
|
int port = htons(host_port);
|
|
socklen_t addr_len;
|
|
|
|
for (so = head->so_next; so != head; so = so->so_next) {
|
|
addr_len = sizeof(addr);
|
|
if ((so->so_state & SS_HOSTFWD) &&
|
|
getsockname(so->s, (struct sockaddr *)&addr, &addr_len) == 0 &&
|
|
addr.sin_addr.s_addr == host_addr.s_addr &&
|
|
addr.sin_port == port) {
|
|
close(so->s);
|
|
sofree(so);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
int slirp_add_hostfwd(Slirp *slirp, int is_udp, struct in_addr host_addr,
|
|
int host_port, struct in_addr guest_addr, int guest_port)
|
|
{
|
|
if (!guest_addr.s_addr) {
|
|
guest_addr = slirp->vdhcp_startaddr;
|
|
}
|
|
if (is_udp) {
|
|
if (!udp_listen(slirp, host_addr.s_addr, htons(host_port),
|
|
guest_addr.s_addr, htons(guest_port), SS_HOSTFWD))
|
|
return -1;
|
|
} else {
|
|
if (!tcp_listen(slirp, host_addr.s_addr, htons(host_port),
|
|
guest_addr.s_addr, htons(guest_port), SS_HOSTFWD))
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int slirp_add_exec(Slirp *slirp, int do_pty, const void *args,
|
|
struct in_addr *guest_addr, int guest_port)
|
|
{
|
|
if (!guest_addr->s_addr) {
|
|
guest_addr->s_addr = slirp->vnetwork_addr.s_addr |
|
|
(htonl(0x0204) & ~slirp->vnetwork_mask.s_addr);
|
|
}
|
|
if ((guest_addr->s_addr & slirp->vnetwork_mask.s_addr) !=
|
|
slirp->vnetwork_addr.s_addr ||
|
|
guest_addr->s_addr == slirp->vhost_addr.s_addr ||
|
|
guest_addr->s_addr == slirp->vnameserver_addr.s_addr) {
|
|
return -1;
|
|
}
|
|
return add_exec(&slirp->exec_list, do_pty, (char *)args, *guest_addr,
|
|
htons(guest_port));
|
|
}
|
|
|
|
ssize_t slirp_send(struct socket *so, const void *buf, size_t len, int flags)
|
|
{
|
|
if (so->s == -1 && so->extra) {
|
|
/* XXX this blocks entire thread. Rewrite to use
|
|
* qemu_chr_fe_write and background I/O callbacks */
|
|
qemu_chr_fe_write_all(so->extra, buf, len);
|
|
return len;
|
|
}
|
|
|
|
if (so->s == -1) {
|
|
/*
|
|
* This should in theory not happen but it is hard to be
|
|
* sure because some code paths will end up with so->s == -1
|
|
* on a failure but don't dispose of the struct socket.
|
|
* Check specifically, so we don't pass -1 to send().
|
|
*/
|
|
errno = EBADF;
|
|
return -1;
|
|
}
|
|
|
|
return send(so->s, buf, len, flags);
|
|
}
|
|
|
|
static struct socket *
|
|
slirp_find_ctl_socket(Slirp *slirp, struct in_addr guest_addr, int guest_port)
|
|
{
|
|
struct socket *so;
|
|
|
|
for (so = slirp->tcb.so_next; so != &slirp->tcb; so = so->so_next) {
|
|
if (so->so_faddr.s_addr == guest_addr.s_addr &&
|
|
htons(so->so_fport) == guest_port) {
|
|
return so;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
size_t slirp_socket_can_recv(Slirp *slirp, struct in_addr guest_addr,
|
|
int guest_port)
|
|
{
|
|
struct iovec iov[2];
|
|
struct socket *so;
|
|
|
|
so = slirp_find_ctl_socket(slirp, guest_addr, guest_port);
|
|
|
|
if (!so || so->so_state & SS_NOFDREF) {
|
|
return 0;
|
|
}
|
|
|
|
if (!CONN_CANFRCV(so) || so->so_snd.sb_cc >= (so->so_snd.sb_datalen/2)) {
|
|
return 0;
|
|
}
|
|
|
|
return sopreprbuf(so, iov, NULL);
|
|
}
|
|
|
|
void slirp_socket_recv(Slirp *slirp, struct in_addr guest_addr, int guest_port,
|
|
const uint8_t *buf, int size)
|
|
{
|
|
int ret;
|
|
struct socket *so = slirp_find_ctl_socket(slirp, guest_addr, guest_port);
|
|
|
|
if (!so)
|
|
return;
|
|
|
|
ret = soreadbuf(so, (const char *)buf, size);
|
|
|
|
if (ret > 0)
|
|
tcp_output(sototcpcb(so));
|
|
}
|
|
|
|
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) {
|
|
error_report("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:
|
|
error_report("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 ex_list *ex_ptr;
|
|
|
|
for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next)
|
|
if (ex_ptr->ex_pty == 3) {
|
|
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 ex_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->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) {
|
|
if (ex_ptr->ex_pty == 3 &&
|
|
so->so_faddr.s_addr == ex_ptr->ex_addr.s_addr &&
|
|
so->so_fport == ex_ptr->ex_fport) {
|
|
break;
|
|
}
|
|
}
|
|
if (!ex_ptr)
|
|
return -EINVAL;
|
|
|
|
so->extra = (void *)ex_ptr->ex_exec;
|
|
}
|
|
|
|
return vmstate_load_state(f, &vmstate_slirp, slirp, version_id);
|
|
}
|