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/*
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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-common.h" |
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#include "qemu-char.h" |
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#include "slirp.h" |
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#include "hw/hw.h" |
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|
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/* host address */
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struct in_addr our_addr;
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/* host dns address */
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struct in_addr dns_addr;
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/* host loopback address */
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struct in_addr loopback_addr;
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|
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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[6] = { |
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0x52, 0x55, 0x00, 0x00, 0x00, 0x00 |
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}; |
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|
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static const uint8_t zero_ethaddr[6] = { 0, 0, 0, 0, 0, 0 }; |
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|
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int link_up; // FIXME: kill this |
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|
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/* XXX: suppress those select globals */
|
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fd_set *global_readfds, *global_writefds, *global_xfds; |
| 47 |
|
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u_int curtime; |
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static u_int time_fasttimo, last_slowtimo;
|
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static int do_slowtimo; |
| 51 |
|
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Slirp slirp_instance; |
| 53 |
|
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#ifdef _WIN32
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|
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static 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; |
| 60 |
DWORD ret; |
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IP_ADDR_STRING *pIPAddr; |
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struct in_addr tmp_addr;
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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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|
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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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} |
| 74 |
|
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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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|
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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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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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|
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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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|
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#else
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|
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static int get_dns_addr(struct in_addr *pdns_addr) |
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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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struct in_addr tmp_addr;
|
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|
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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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|
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#ifdef DEBUG
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lprint("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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if (!inet_aton(buff2, &tmp_addr))
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continue;
|
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if (tmp_addr.s_addr == loopback_addr.s_addr)
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tmp_addr = our_addr; |
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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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*pdns_addr = tmp_addr; |
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#ifdef DEBUG
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else
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lprint(", ");
|
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#endif
|
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if (++found > 3) { |
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#ifdef DEBUG
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lprint("(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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lprint("%s", inet_ntoa(tmp_addr));
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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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|
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#endif
|
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|
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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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struct hostent *he;
|
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char our_name[256]; |
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#ifdef _WIN32
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WSADATA Data; |
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#endif
|
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|
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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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|
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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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|
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loopback_addr.s_addr = htonl(INADDR_LOOPBACK); |
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|
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/* FIXME: This address may change during runtime */
|
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if (gethostname(our_name, sizeof(our_name)) == 0) { |
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he = gethostbyname(our_name); |
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if (he) {
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our_addr = *(struct in_addr *)he->h_addr;
|
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} |
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} |
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if (our_addr.s_addr == 0) { |
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our_addr = loopback_addr; |
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} |
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|
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/* FIXME: This address may change during runtime */
|
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if (get_dns_addr(&dns_addr) < 0) { |
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dns_addr = loopback_addr; |
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} |
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} |
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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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|
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void slirp_init(int restricted, struct in_addr vnetwork, |
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struct in_addr vnetmask, struct in_addr vhost, |
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const char *vhostname, const char *tftp_path, |
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const char *bootfile, struct in_addr vdhcp_start, |
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struct in_addr vnameserver)
|
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{
|
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Slirp *slirp = &slirp_instance; |
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|
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slirp_init_once(); |
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|
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link_up = 1;
|
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slirp->restricted = restricted; |
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|
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if_init(slirp); |
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ip_init(slirp); |
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|
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/* Initialise mbufs *after* setting the MTU */
|
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m_init(slirp); |
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|
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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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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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qemu_free(slirp->tftp_prefix); |
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slirp->tftp_prefix = NULL;
|
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if (tftp_path) {
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slirp->tftp_prefix = qemu_strdup(tftp_path); |
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} |
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qemu_free(slirp->bootp_filename); |
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slirp->bootp_filename = NULL;
|
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if (bootfile) {
|
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slirp->bootp_filename = qemu_strdup(bootfile); |
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} |
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slirp->vdhcp_startaddr = vdhcp_start; |
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slirp->vnameserver_addr = vnameserver; |
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|
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register_savevm("slirp", 0, 2, slirp_state_save, slirp_state_load, slirp); |
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} |
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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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#define UPD_NFDS(x) if (nfds < (x)) nfds = (x) |
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|
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/*
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* curtime kept to an accuracy of 1ms
|
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*/
|
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#ifdef _WIN32
|
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static void updtime(void) |
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{
|
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struct _timeb tb;
|
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|
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_ftime(&tb); |
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|
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curtime = tb.time * 1000 + tb.millitm;
|
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} |
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#else
|
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static void updtime(void) |
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{
|
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struct timeval tv;
|
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|
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gettimeofday(&tv, NULL);
|
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|
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curtime = tv.tv_sec * 1000 + tv.tv_usec / 1000; |
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} |
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#endif
|
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|
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void slirp_select_fill(int *pnfds, |
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fd_set *readfds, fd_set *writefds, fd_set *xfds) |
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{
|
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Slirp *slirp = &slirp_instance; |
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struct socket *so, *so_next;
|
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int nfds;
|
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|
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if (!link_up) {
|
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return;
|
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} |
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|
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/* fail safe */
|
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global_readfds = NULL;
|
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global_writefds = NULL;
|
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global_xfds = NULL;
|
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|
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nfds = *pnfds; |
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/*
|
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* First, TCP sockets
|
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*/
|
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do_slowtimo = 0;
|
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|
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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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do_slowtimo = ((slirp->tcb.so_next != &slirp->tcb) || |
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(&slirp->ipq.ip_link != slirp->ipq.ip_link.next)); |
| 287 |
|
| 288 |
for (so = slirp->tcb.so_next; so != &slirp->tcb;
|
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so = so_next) {
|
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so_next = so->so_next; |
| 291 |
|
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/*
|
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* See if we need a tcp_fasttimo
|
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*/
|
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if (time_fasttimo == 0 && so->so_tcpcb->t_flags & TF_DELACK) |
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time_fasttimo = curtime; /* Flag when we want a fasttimo */
|
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|
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/*
|
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* NOFDREF can include still connecting to local-host,
|
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* newly socreated() sockets etc. Don't want to select these.
|
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*/
|
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if (so->so_state & SS_NOFDREF || so->s == -1) |
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continue;
|
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|
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/*
|
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* Set for reading sockets which are accepting
|
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*/
|
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if (so->so_state & SS_FACCEPTCONN) {
|
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FD_SET(so->s, readfds); |
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UPD_NFDS(so->s); |
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continue;
|
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} |
| 313 |
|
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/*
|
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* Set for writing sockets which are connecting
|
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*/
|
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if (so->so_state & SS_ISFCONNECTING) {
|
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FD_SET(so->s, writefds); |
| 319 |
UPD_NFDS(so->s); |
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continue;
|
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} |
| 322 |
|
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/*
|
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* Set for writing if we are connected, can send more, and
|
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* we have something to send
|
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*/
|
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if (CONN_CANFSEND(so) && so->so_rcv.sb_cc) {
|
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FD_SET(so->s, writefds); |
| 329 |
UPD_NFDS(so->s); |
| 330 |
} |
| 331 |
|
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/*
|
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* Set for reading (and urgent data) if we are connected, can
|
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* receive more, and we have room for it XXX /2 ?
|
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*/
|
| 336 |
if (CONN_CANFRCV(so) && (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2))) { |
| 337 |
FD_SET(so->s, readfds); |
| 338 |
FD_SET(so->s, xfds); |
| 339 |
UPD_NFDS(so->s); |
| 340 |
} |
| 341 |
} |
| 342 |
|
| 343 |
/*
|
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* UDP sockets
|
| 345 |
*/
|
| 346 |
for (so = slirp->udb.so_next; so != &slirp->udb;
|
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so = so_next) {
|
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so_next = so->so_next; |
| 349 |
|
| 350 |
/*
|
| 351 |
* See if it's timed out
|
| 352 |
*/
|
| 353 |
if (so->so_expire) {
|
| 354 |
if (so->so_expire <= curtime) {
|
| 355 |
udp_detach(so); |
| 356 |
continue;
|
| 357 |
} else
|
| 358 |
do_slowtimo = 1; /* Let socket expire */ |
| 359 |
} |
| 360 |
|
| 361 |
/*
|
| 362 |
* When UDP packets are received from over the
|
| 363 |
* link, they're sendto()'d straight away, so
|
| 364 |
* no need for setting for writing
|
| 365 |
* Limit the number of packets queued by this session
|
| 366 |
* to 4. Note that even though we try and limit this
|
| 367 |
* to 4 packets, the session could have more queued
|
| 368 |
* if the packets needed to be fragmented
|
| 369 |
* (XXX <= 4 ?)
|
| 370 |
*/
|
| 371 |
if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4) { |
| 372 |
FD_SET(so->s, readfds); |
| 373 |
UPD_NFDS(so->s); |
| 374 |
} |
| 375 |
} |
| 376 |
|
| 377 |
*pnfds = nfds; |
| 378 |
} |
| 379 |
|
| 380 |
void slirp_select_poll(fd_set *readfds, fd_set *writefds, fd_set *xfds,
|
| 381 |
int select_error)
|
| 382 |
{
|
| 383 |
Slirp *slirp = &slirp_instance; |
| 384 |
struct socket *so, *so_next;
|
| 385 |
int ret;
|
| 386 |
|
| 387 |
if (!link_up) {
|
| 388 |
return;
|
| 389 |
} |
| 390 |
|
| 391 |
global_readfds = readfds; |
| 392 |
global_writefds = writefds; |
| 393 |
global_xfds = xfds; |
| 394 |
|
| 395 |
/* Update time */
|
| 396 |
updtime(); |
| 397 |
|
| 398 |
/*
|
| 399 |
* See if anything has timed out
|
| 400 |
*/
|
| 401 |
if (time_fasttimo && ((curtime - time_fasttimo) >= 2)) { |
| 402 |
tcp_fasttimo(slirp); |
| 403 |
time_fasttimo = 0;
|
| 404 |
} |
| 405 |
if (do_slowtimo && ((curtime - last_slowtimo) >= 499)) { |
| 406 |
ip_slowtimo(slirp); |
| 407 |
tcp_slowtimo(slirp); |
| 408 |
last_slowtimo = curtime; |
| 409 |
} |
| 410 |
|
| 411 |
/*
|
| 412 |
* Check sockets
|
| 413 |
*/
|
| 414 |
if (!select_error) {
|
| 415 |
/*
|
| 416 |
* Check TCP sockets
|
| 417 |
*/
|
| 418 |
for (so = slirp->tcb.so_next; so != &slirp->tcb;
|
| 419 |
so = so_next) {
|
| 420 |
so_next = so->so_next; |
| 421 |
|
| 422 |
/*
|
| 423 |
* FD_ISSET is meaningless on these sockets
|
| 424 |
* (and they can crash the program)
|
| 425 |
*/
|
| 426 |
if (so->so_state & SS_NOFDREF || so->s == -1) |
| 427 |
continue;
|
| 428 |
|
| 429 |
/*
|
| 430 |
* Check for URG data
|
| 431 |
* This will soread as well, so no need to
|
| 432 |
* test for readfds below if this succeeds
|
| 433 |
*/
|
| 434 |
if (FD_ISSET(so->s, xfds))
|
| 435 |
sorecvoob(so); |
| 436 |
/*
|
| 437 |
* Check sockets for reading
|
| 438 |
*/
|
| 439 |
else if (FD_ISSET(so->s, readfds)) { |
| 440 |
/*
|
| 441 |
* Check for incoming connections
|
| 442 |
*/
|
| 443 |
if (so->so_state & SS_FACCEPTCONN) {
|
| 444 |
tcp_connect(so); |
| 445 |
continue;
|
| 446 |
} /* else */
|
| 447 |
ret = soread(so); |
| 448 |
|
| 449 |
/* Output it if we read something */
|
| 450 |
if (ret > 0) |
| 451 |
tcp_output(sototcpcb(so)); |
| 452 |
} |
| 453 |
|
| 454 |
/*
|
| 455 |
* Check sockets for writing
|
| 456 |
*/
|
| 457 |
if (FD_ISSET(so->s, writefds)) {
|
| 458 |
/*
|
| 459 |
* Check for non-blocking, still-connecting sockets
|
| 460 |
*/
|
| 461 |
if (so->so_state & SS_ISFCONNECTING) {
|
| 462 |
/* Connected */
|
| 463 |
so->so_state &= ~SS_ISFCONNECTING; |
| 464 |
|
| 465 |
ret = send(so->s, (const void *) &ret, 0, 0); |
| 466 |
if (ret < 0) { |
| 467 |
/* XXXXX Must fix, zero bytes is a NOP */
|
| 468 |
if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
| 469 |
errno == EINPROGRESS || errno == ENOTCONN) |
| 470 |
continue;
|
| 471 |
|
| 472 |
/* else failed */
|
| 473 |
so->so_state &= SS_PERSISTENT_MASK; |
| 474 |
so->so_state |= SS_NOFDREF; |
| 475 |
} |
| 476 |
/* else so->so_state &= ~SS_ISFCONNECTING; */
|
| 477 |
|
| 478 |
/*
|
| 479 |
* Continue tcp_input
|
| 480 |
*/
|
| 481 |
tcp_input((struct mbuf *)NULL, sizeof(struct ip), so); |
| 482 |
/* continue; */
|
| 483 |
} else
|
| 484 |
ret = sowrite(so); |
| 485 |
/*
|
| 486 |
* XXXXX If we wrote something (a lot), there
|
| 487 |
* could be a need for a window update.
|
| 488 |
* In the worst case, the remote will send
|
| 489 |
* a window probe to get things going again
|
| 490 |
*/
|
| 491 |
} |
| 492 |
|
| 493 |
/*
|
| 494 |
* Probe a still-connecting, non-blocking socket
|
| 495 |
* to check if it's still alive
|
| 496 |
*/
|
| 497 |
#ifdef PROBE_CONN
|
| 498 |
if (so->so_state & SS_ISFCONNECTING) {
|
| 499 |
ret = recv(so->s, (char *)&ret, 0,0); |
| 500 |
|
| 501 |
if (ret < 0) { |
| 502 |
/* XXX */
|
| 503 |
if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
| 504 |
errno == EINPROGRESS || errno == ENOTCONN) |
| 505 |
continue; /* Still connecting, continue */ |
| 506 |
|
| 507 |
/* else failed */
|
| 508 |
so->so_state &= SS_PERSISTENT_MASK; |
| 509 |
so->so_state |= SS_NOFDREF; |
| 510 |
|
| 511 |
/* tcp_input will take care of it */
|
| 512 |
} else {
|
| 513 |
ret = send(so->s, &ret, 0,0); |
| 514 |
if (ret < 0) { |
| 515 |
/* XXX */
|
| 516 |
if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
| 517 |
errno == EINPROGRESS || errno == ENOTCONN) |
| 518 |
continue;
|
| 519 |
/* else failed */
|
| 520 |
so->so_state &= SS_PERSISTENT_MASK; |
| 521 |
so->so_state |= SS_NOFDREF; |
| 522 |
} else
|
| 523 |
so->so_state &= ~SS_ISFCONNECTING; |
| 524 |
|
| 525 |
} |
| 526 |
tcp_input((struct mbuf *)NULL, sizeof(struct ip),so); |
| 527 |
} /* SS_ISFCONNECTING */
|
| 528 |
#endif
|
| 529 |
} |
| 530 |
|
| 531 |
/*
|
| 532 |
* Now UDP sockets.
|
| 533 |
* Incoming packets are sent straight away, they're not buffered.
|
| 534 |
* Incoming UDP data isn't buffered either.
|
| 535 |
*/
|
| 536 |
for (so = slirp->udb.so_next; so != &slirp->udb;
|
| 537 |
so = so_next) {
|
| 538 |
so_next = so->so_next; |
| 539 |
|
| 540 |
if (so->s != -1 && FD_ISSET(so->s, readfds)) { |
| 541 |
sorecvfrom(so); |
| 542 |
} |
| 543 |
} |
| 544 |
} |
| 545 |
|
| 546 |
/*
|
| 547 |
* See if we can start outputting
|
| 548 |
*/
|
| 549 |
if (slirp->if_queued) {
|
| 550 |
if_start(slirp); |
| 551 |
} |
| 552 |
|
| 553 |
/* clear global file descriptor sets.
|
| 554 |
* these reside on the stack in vl.c
|
| 555 |
* so they're unusable if we're not in
|
| 556 |
* slirp_select_fill or slirp_select_poll.
|
| 557 |
*/
|
| 558 |
global_readfds = NULL;
|
| 559 |
global_writefds = NULL;
|
| 560 |
global_xfds = NULL;
|
| 561 |
} |
| 562 |
|
| 563 |
#define ETH_ALEN 6 |
| 564 |
#define ETH_HLEN 14 |
| 565 |
|
| 566 |
#define ETH_P_IP 0x0800 /* Internet Protocol packet */ |
| 567 |
#define ETH_P_ARP 0x0806 /* Address Resolution packet */ |
| 568 |
|
| 569 |
#define ARPOP_REQUEST 1 /* ARP request */ |
| 570 |
#define ARPOP_REPLY 2 /* ARP reply */ |
| 571 |
|
| 572 |
struct ethhdr
|
| 573 |
{
|
| 574 |
unsigned char h_dest[ETH_ALEN]; /* destination eth addr */ |
| 575 |
unsigned char h_source[ETH_ALEN]; /* source ether addr */ |
| 576 |
unsigned short h_proto; /* packet type ID field */ |
| 577 |
}; |
| 578 |
|
| 579 |
struct arphdr
|
| 580 |
{
|
| 581 |
unsigned short ar_hrd; /* format of hardware address */ |
| 582 |
unsigned short ar_pro; /* format of protocol address */ |
| 583 |
unsigned char ar_hln; /* length of hardware address */ |
| 584 |
unsigned char ar_pln; /* length of protocol address */ |
| 585 |
unsigned short ar_op; /* ARP opcode (command) */ |
| 586 |
|
| 587 |
/*
|
| 588 |
* Ethernet looks like this : This bit is variable sized however...
|
| 589 |
*/
|
| 590 |
unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ |
| 591 |
uint32_t ar_sip; /* sender IP address */
|
| 592 |
unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ |
| 593 |
uint32_t ar_tip ; /* target IP address */
|
| 594 |
} __attribute__((packed)); |
| 595 |
|
| 596 |
static void arp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len) |
| 597 |
{
|
| 598 |
struct ethhdr *eh = (struct ethhdr *)pkt; |
| 599 |
struct arphdr *ah = (struct arphdr *)(pkt + ETH_HLEN); |
| 600 |
uint8_t arp_reply[ETH_HLEN + sizeof(struct arphdr)]; |
| 601 |
struct ethhdr *reh = (struct ethhdr *)arp_reply; |
| 602 |
struct arphdr *rah = (struct arphdr *)(arp_reply + ETH_HLEN); |
| 603 |
int ar_op;
|
| 604 |
struct ex_list *ex_ptr;
|
| 605 |
|
| 606 |
ar_op = ntohs(ah->ar_op); |
| 607 |
switch(ar_op) {
|
| 608 |
case ARPOP_REQUEST:
|
| 609 |
if ((ah->ar_tip & slirp->vnetwork_mask.s_addr) ==
|
| 610 |
slirp->vnetwork_addr.s_addr) {
|
| 611 |
if (ah->ar_tip == slirp->vnameserver_addr.s_addr ||
|
| 612 |
ah->ar_tip == slirp->vhost_addr.s_addr) |
| 613 |
goto arp_ok;
|
| 614 |
for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) {
|
| 615 |
if (ex_ptr->ex_addr.s_addr == ah->ar_tip)
|
| 616 |
goto arp_ok;
|
| 617 |
} |
| 618 |
return;
|
| 619 |
arp_ok:
|
| 620 |
/* XXX: make an ARP request to have the client address */
|
| 621 |
memcpy(slirp->client_ethaddr, eh->h_source, ETH_ALEN); |
| 622 |
|
| 623 |
/* ARP request for alias/dns mac address */
|
| 624 |
memcpy(reh->h_dest, pkt + ETH_ALEN, ETH_ALEN); |
| 625 |
memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 4);
|
| 626 |
memcpy(&reh->h_source[2], &ah->ar_tip, 4); |
| 627 |
reh->h_proto = htons(ETH_P_ARP); |
| 628 |
|
| 629 |
rah->ar_hrd = htons(1);
|
| 630 |
rah->ar_pro = htons(ETH_P_IP); |
| 631 |
rah->ar_hln = ETH_ALEN; |
| 632 |
rah->ar_pln = 4;
|
| 633 |
rah->ar_op = htons(ARPOP_REPLY); |
| 634 |
memcpy(rah->ar_sha, reh->h_source, ETH_ALEN); |
| 635 |
rah->ar_sip = ah->ar_tip; |
| 636 |
memcpy(rah->ar_tha, ah->ar_sha, ETH_ALEN); |
| 637 |
rah->ar_tip = ah->ar_sip; |
| 638 |
slirp_output(arp_reply, sizeof(arp_reply));
|
| 639 |
} |
| 640 |
break;
|
| 641 |
case ARPOP_REPLY:
|
| 642 |
/* reply to request of client mac address ? */
|
| 643 |
if (!memcmp(slirp->client_ethaddr, zero_ethaddr, ETH_ALEN) &&
|
| 644 |
ah->ar_sip == slirp->client_ipaddr.s_addr) {
|
| 645 |
memcpy(slirp->client_ethaddr, ah->ar_sha, ETH_ALEN); |
| 646 |
} |
| 647 |
break;
|
| 648 |
default:
|
| 649 |
break;
|
| 650 |
} |
| 651 |
} |
| 652 |
|
| 653 |
void slirp_input(const uint8_t *pkt, int pkt_len) |
| 654 |
{
|
| 655 |
Slirp *slirp = &slirp_instance; |
| 656 |
struct mbuf *m;
|
| 657 |
int proto;
|
| 658 |
|
| 659 |
if (pkt_len < ETH_HLEN)
|
| 660 |
return;
|
| 661 |
|
| 662 |
proto = ntohs(*(uint16_t *)(pkt + 12));
|
| 663 |
switch(proto) {
|
| 664 |
case ETH_P_ARP:
|
| 665 |
arp_input(slirp, pkt, pkt_len); |
| 666 |
break;
|
| 667 |
case ETH_P_IP:
|
| 668 |
m = m_get(slirp); |
| 669 |
if (!m)
|
| 670 |
return;
|
| 671 |
/* Note: we add to align the IP header */
|
| 672 |
if (M_FREEROOM(m) < pkt_len + 2) { |
| 673 |
m_inc(m, pkt_len + 2);
|
| 674 |
} |
| 675 |
m->m_len = pkt_len + 2;
|
| 676 |
memcpy(m->m_data + 2, pkt, pkt_len);
|
| 677 |
|
| 678 |
m->m_data += 2 + ETH_HLEN;
|
| 679 |
m->m_len -= 2 + ETH_HLEN;
|
| 680 |
|
| 681 |
ip_input(m); |
| 682 |
break;
|
| 683 |
default:
|
| 684 |
break;
|
| 685 |
} |
| 686 |
} |
| 687 |
|
| 688 |
/* output the IP packet to the ethernet device */
|
| 689 |
void if_encap(Slirp *slirp, const uint8_t *ip_data, int ip_data_len) |
| 690 |
{
|
| 691 |
uint8_t buf[1600];
|
| 692 |
struct ethhdr *eh = (struct ethhdr *)buf; |
| 693 |
|
| 694 |
if (ip_data_len + ETH_HLEN > sizeof(buf)) |
| 695 |
return;
|
| 696 |
|
| 697 |
if (!memcmp(slirp->client_ethaddr, zero_ethaddr, ETH_ALEN)) {
|
| 698 |
uint8_t arp_req[ETH_HLEN + sizeof(struct arphdr)]; |
| 699 |
struct ethhdr *reh = (struct ethhdr *)arp_req; |
| 700 |
struct arphdr *rah = (struct arphdr *)(arp_req + ETH_HLEN); |
| 701 |
const struct ip *iph = (const struct ip *)ip_data; |
| 702 |
|
| 703 |
/* If the client addr is not known, there is no point in
|
| 704 |
sending the packet to it. Normally the sender should have
|
| 705 |
done an ARP request to get its MAC address. Here we do it
|
| 706 |
in place of sending the packet and we hope that the sender
|
| 707 |
will retry sending its packet. */
|
| 708 |
memset(reh->h_dest, 0xff, ETH_ALEN);
|
| 709 |
memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 4);
|
| 710 |
memcpy(&reh->h_source[2], &slirp->vhost_addr, 4); |
| 711 |
reh->h_proto = htons(ETH_P_ARP); |
| 712 |
rah->ar_hrd = htons(1);
|
| 713 |
rah->ar_pro = htons(ETH_P_IP); |
| 714 |
rah->ar_hln = ETH_ALEN; |
| 715 |
rah->ar_pln = 4;
|
| 716 |
rah->ar_op = htons(ARPOP_REQUEST); |
| 717 |
/* source hw addr */
|
| 718 |
memcpy(rah->ar_sha, special_ethaddr, ETH_ALEN - 4);
|
| 719 |
memcpy(&rah->ar_sha[2], &slirp->vhost_addr, 4); |
| 720 |
/* source IP */
|
| 721 |
rah->ar_sip = slirp->vhost_addr.s_addr; |
| 722 |
/* target hw addr (none) */
|
| 723 |
memset(rah->ar_tha, 0, ETH_ALEN);
|
| 724 |
/* target IP */
|
| 725 |
rah->ar_tip = iph->ip_dst.s_addr; |
| 726 |
slirp->client_ipaddr = iph->ip_dst; |
| 727 |
slirp_output(arp_req, sizeof(arp_req));
|
| 728 |
} else {
|
| 729 |
memcpy(eh->h_dest, slirp->client_ethaddr, ETH_ALEN); |
| 730 |
memcpy(eh->h_source, special_ethaddr, ETH_ALEN - 4);
|
| 731 |
/* XXX: not correct */
|
| 732 |
memcpy(&eh->h_source[2], &slirp->vhost_addr, 4); |
| 733 |
eh->h_proto = htons(ETH_P_IP); |
| 734 |
memcpy(buf + sizeof(struct ethhdr), ip_data, ip_data_len); |
| 735 |
slirp_output(buf, ip_data_len + ETH_HLEN); |
| 736 |
} |
| 737 |
} |
| 738 |
|
| 739 |
/* Drop host forwarding rule, return 0 if found. */
|
| 740 |
int slirp_remove_hostfwd(int is_udp, struct in_addr host_addr, int host_port) |
| 741 |
{
|
| 742 |
Slirp *slirp = &slirp_instance; |
| 743 |
struct socket *so;
|
| 744 |
struct socket *head = (is_udp ? &slirp->udb : &slirp->tcb);
|
| 745 |
struct sockaddr_in addr;
|
| 746 |
int port = htons(host_port);
|
| 747 |
socklen_t addr_len; |
| 748 |
|
| 749 |
for (so = head->so_next; so != head; so = so->so_next) {
|
| 750 |
addr_len = sizeof(addr);
|
| 751 |
if ((so->so_state & SS_HOSTFWD) &&
|
| 752 |
getsockname(so->s, (struct sockaddr *)&addr, &addr_len) == 0 && |
| 753 |
addr.sin_addr.s_addr == host_addr.s_addr && |
| 754 |
addr.sin_port == port) {
|
| 755 |
close(so->s); |
| 756 |
sofree(so); |
| 757 |
return 0; |
| 758 |
} |
| 759 |
} |
| 760 |
|
| 761 |
return -1; |
| 762 |
} |
| 763 |
|
| 764 |
int slirp_add_hostfwd(int is_udp, struct in_addr host_addr, int host_port, |
| 765 |
struct in_addr guest_addr, int guest_port) |
| 766 |
{
|
| 767 |
Slirp *slirp = &slirp_instance; |
| 768 |
|
| 769 |
if (!guest_addr.s_addr) {
|
| 770 |
guest_addr = slirp->vdhcp_startaddr; |
| 771 |
} |
| 772 |
if (is_udp) {
|
| 773 |
if (!udp_listen(slirp, host_addr.s_addr, htons(host_port),
|
| 774 |
guest_addr.s_addr, htons(guest_port), SS_HOSTFWD)) |
| 775 |
return -1; |
| 776 |
} else {
|
| 777 |
if (!tcp_listen(slirp, host_addr.s_addr, htons(host_port),
|
| 778 |
guest_addr.s_addr, htons(guest_port), SS_HOSTFWD)) |
| 779 |
return -1; |
| 780 |
} |
| 781 |
return 0; |
| 782 |
} |
| 783 |
|
| 784 |
int slirp_add_exec(int do_pty, const void *args, struct in_addr guest_addr, |
| 785 |
int guest_port)
|
| 786 |
{
|
| 787 |
Slirp *slirp = &slirp_instance; |
| 788 |
|
| 789 |
if (!guest_addr.s_addr) {
|
| 790 |
guest_addr.s_addr = slirp->vnetwork_addr.s_addr | |
| 791 |
(htonl(0x0204) & ~slirp->vnetwork_mask.s_addr);
|
| 792 |
} |
| 793 |
if ((guest_addr.s_addr & slirp->vnetwork_mask.s_addr) !=
|
| 794 |
slirp->vnetwork_addr.s_addr || |
| 795 |
guest_addr.s_addr == slirp->vhost_addr.s_addr || |
| 796 |
guest_addr.s_addr == slirp->vnameserver_addr.s_addr) {
|
| 797 |
return -1; |
| 798 |
} |
| 799 |
return add_exec(&slirp->exec_list, do_pty, (char *)args, guest_addr, |
| 800 |
htons(guest_port)); |
| 801 |
} |
| 802 |
|
| 803 |
ssize_t slirp_send(struct socket *so, const void *buf, size_t len, int flags) |
| 804 |
{
|
| 805 |
if (so->s == -1 && so->extra) { |
| 806 |
qemu_chr_write(so->extra, buf, len); |
| 807 |
return len;
|
| 808 |
} |
| 809 |
|
| 810 |
return send(so->s, buf, len, flags);
|
| 811 |
} |
| 812 |
|
| 813 |
static struct socket * |
| 814 |
slirp_find_ctl_socket(Slirp *slirp, struct in_addr guest_addr, int guest_port) |
| 815 |
{
|
| 816 |
struct socket *so;
|
| 817 |
|
| 818 |
for (so = slirp->tcb.so_next; so != &slirp->tcb; so = so->so_next) {
|
| 819 |
if (so->so_faddr.s_addr == guest_addr.s_addr &&
|
| 820 |
htons(so->so_fport) == guest_port) {
|
| 821 |
return so;
|
| 822 |
} |
| 823 |
} |
| 824 |
return NULL; |
| 825 |
} |
| 826 |
|
| 827 |
size_t slirp_socket_can_recv(struct in_addr guest_addr, int guest_port) |
| 828 |
{
|
| 829 |
Slirp *slirp = &slirp_instance; |
| 830 |
struct iovec iov[2]; |
| 831 |
struct socket *so;
|
| 832 |
|
| 833 |
so = slirp_find_ctl_socket(slirp, guest_addr, guest_port); |
| 834 |
|
| 835 |
if (!so || so->so_state & SS_NOFDREF)
|
| 836 |
return 0; |
| 837 |
|
| 838 |
if (!CONN_CANFRCV(so) || so->so_snd.sb_cc >= (so->so_snd.sb_datalen/2)) |
| 839 |
return 0; |
| 840 |
|
| 841 |
return sopreprbuf(so, iov, NULL); |
| 842 |
} |
| 843 |
|
| 844 |
void slirp_socket_recv(struct in_addr guest_addr, int guest_port, |
| 845 |
const uint8_t *buf, int size) |
| 846 |
{
|
| 847 |
Slirp *slirp = &slirp_instance; |
| 848 |
int ret;
|
| 849 |
struct socket *so = slirp_find_ctl_socket(slirp, guest_addr, guest_port);
|
| 850 |
|
| 851 |
if (!so)
|
| 852 |
return;
|
| 853 |
|
| 854 |
ret = soreadbuf(so, (const char *)buf, size); |
| 855 |
|
| 856 |
if (ret > 0) |
| 857 |
tcp_output(sototcpcb(so)); |
| 858 |
} |
| 859 |
|
| 860 |
static void slirp_tcp_save(QEMUFile *f, struct tcpcb *tp) |
| 861 |
{
|
| 862 |
int i;
|
| 863 |
|
| 864 |
qemu_put_sbe16(f, tp->t_state); |
| 865 |
for (i = 0; i < TCPT_NTIMERS; i++) |
| 866 |
qemu_put_sbe16(f, tp->t_timer[i]); |
| 867 |
qemu_put_sbe16(f, tp->t_rxtshift); |
| 868 |
qemu_put_sbe16(f, tp->t_rxtcur); |
| 869 |
qemu_put_sbe16(f, tp->t_dupacks); |
| 870 |
qemu_put_be16(f, tp->t_maxseg); |
| 871 |
qemu_put_sbyte(f, tp->t_force); |
| 872 |
qemu_put_be16(f, tp->t_flags); |
| 873 |
qemu_put_be32(f, tp->snd_una); |
| 874 |
qemu_put_be32(f, tp->snd_nxt); |
| 875 |
qemu_put_be32(f, tp->snd_up); |
| 876 |
qemu_put_be32(f, tp->snd_wl1); |
| 877 |
qemu_put_be32(f, tp->snd_wl2); |
| 878 |
qemu_put_be32(f, tp->iss); |
| 879 |
qemu_put_be32(f, tp->snd_wnd); |
| 880 |
qemu_put_be32(f, tp->rcv_wnd); |
| 881 |
qemu_put_be32(f, tp->rcv_nxt); |
| 882 |
qemu_put_be32(f, tp->rcv_up); |
| 883 |
qemu_put_be32(f, tp->irs); |
| 884 |
qemu_put_be32(f, tp->rcv_adv); |
| 885 |
qemu_put_be32(f, tp->snd_max); |
| 886 |
qemu_put_be32(f, tp->snd_cwnd); |
| 887 |
qemu_put_be32(f, tp->snd_ssthresh); |
| 888 |
qemu_put_sbe16(f, tp->t_idle); |
| 889 |
qemu_put_sbe16(f, tp->t_rtt); |
| 890 |
qemu_put_be32(f, tp->t_rtseq); |
| 891 |
qemu_put_sbe16(f, tp->t_srtt); |
| 892 |
qemu_put_sbe16(f, tp->t_rttvar); |
| 893 |
qemu_put_be16(f, tp->t_rttmin); |
| 894 |
qemu_put_be32(f, tp->max_sndwnd); |
| 895 |
qemu_put_byte(f, tp->t_oobflags); |
| 896 |
qemu_put_byte(f, tp->t_iobc); |
| 897 |
qemu_put_sbe16(f, tp->t_softerror); |
| 898 |
qemu_put_byte(f, tp->snd_scale); |
| 899 |
qemu_put_byte(f, tp->rcv_scale); |
| 900 |
qemu_put_byte(f, tp->request_r_scale); |
| 901 |
qemu_put_byte(f, tp->requested_s_scale); |
| 902 |
qemu_put_be32(f, tp->ts_recent); |
| 903 |
qemu_put_be32(f, tp->ts_recent_age); |
| 904 |
qemu_put_be32(f, tp->last_ack_sent); |
| 905 |
} |
| 906 |
|
| 907 |
static void slirp_sbuf_save(QEMUFile *f, struct sbuf *sbuf) |
| 908 |
{
|
| 909 |
uint32_t off; |
| 910 |
|
| 911 |
qemu_put_be32(f, sbuf->sb_cc); |
| 912 |
qemu_put_be32(f, sbuf->sb_datalen); |
| 913 |
off = (uint32_t)(sbuf->sb_wptr - sbuf->sb_data); |
| 914 |
qemu_put_sbe32(f, off); |
| 915 |
off = (uint32_t)(sbuf->sb_rptr - sbuf->sb_data); |
| 916 |
qemu_put_sbe32(f, off); |
| 917 |
qemu_put_buffer(f, (unsigned char*)sbuf->sb_data, sbuf->sb_datalen); |
| 918 |
} |
| 919 |
|
| 920 |
static void slirp_socket_save(QEMUFile *f, struct socket *so) |
| 921 |
{
|
| 922 |
qemu_put_be32(f, so->so_urgc); |
| 923 |
qemu_put_be32(f, so->so_faddr.s_addr); |
| 924 |
qemu_put_be32(f, so->so_laddr.s_addr); |
| 925 |
qemu_put_be16(f, so->so_fport); |
| 926 |
qemu_put_be16(f, so->so_lport); |
| 927 |
qemu_put_byte(f, so->so_iptos); |
| 928 |
qemu_put_byte(f, so->so_emu); |
| 929 |
qemu_put_byte(f, so->so_type); |
| 930 |
qemu_put_be32(f, so->so_state); |
| 931 |
slirp_sbuf_save(f, &so->so_rcv); |
| 932 |
slirp_sbuf_save(f, &so->so_snd); |
| 933 |
slirp_tcp_save(f, so->so_tcpcb); |
| 934 |
} |
| 935 |
|
| 936 |
static void slirp_state_save(QEMUFile *f, void *opaque) |
| 937 |
{
|
| 938 |
Slirp *slirp = opaque; |
| 939 |
struct ex_list *ex_ptr;
|
| 940 |
|
| 941 |
for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next)
|
| 942 |
if (ex_ptr->ex_pty == 3) { |
| 943 |
struct socket *so;
|
| 944 |
so = slirp_find_ctl_socket(slirp, ex_ptr->ex_addr, |
| 945 |
ntohs(ex_ptr->ex_fport)); |
| 946 |
if (!so)
|
| 947 |
continue;
|
| 948 |
|
| 949 |
qemu_put_byte(f, 42);
|
| 950 |
slirp_socket_save(f, so); |
| 951 |
} |
| 952 |
qemu_put_byte(f, 0);
|
| 953 |
|
| 954 |
qemu_put_be16(f, slirp->ip_id); |
| 955 |
} |
| 956 |
|
| 957 |
static void slirp_tcp_load(QEMUFile *f, struct tcpcb *tp) |
| 958 |
{
|
| 959 |
int i;
|
| 960 |
|
| 961 |
tp->t_state = qemu_get_sbe16(f); |
| 962 |
for (i = 0; i < TCPT_NTIMERS; i++) |
| 963 |
tp->t_timer[i] = qemu_get_sbe16(f); |
| 964 |
tp->t_rxtshift = qemu_get_sbe16(f); |
| 965 |
tp->t_rxtcur = qemu_get_sbe16(f); |
| 966 |
tp->t_dupacks = qemu_get_sbe16(f); |
| 967 |
tp->t_maxseg = qemu_get_be16(f); |
| 968 |
tp->t_force = qemu_get_sbyte(f); |
| 969 |
tp->t_flags = qemu_get_be16(f); |
| 970 |
tp->snd_una = qemu_get_be32(f); |
| 971 |
tp->snd_nxt = qemu_get_be32(f); |
| 972 |
tp->snd_up = qemu_get_be32(f); |
| 973 |
tp->snd_wl1 = qemu_get_be32(f); |
| 974 |
tp->snd_wl2 = qemu_get_be32(f); |
| 975 |
tp->iss = qemu_get_be32(f); |
| 976 |
tp->snd_wnd = qemu_get_be32(f); |
| 977 |
tp->rcv_wnd = qemu_get_be32(f); |
| 978 |
tp->rcv_nxt = qemu_get_be32(f); |
| 979 |
tp->rcv_up = qemu_get_be32(f); |
| 980 |
tp->irs = qemu_get_be32(f); |
| 981 |
tp->rcv_adv = qemu_get_be32(f); |
| 982 |
tp->snd_max = qemu_get_be32(f); |
| 983 |
tp->snd_cwnd = qemu_get_be32(f); |
| 984 |
tp->snd_ssthresh = qemu_get_be32(f); |
| 985 |
tp->t_idle = qemu_get_sbe16(f); |
| 986 |
tp->t_rtt = qemu_get_sbe16(f); |
| 987 |
tp->t_rtseq = qemu_get_be32(f); |
| 988 |
tp->t_srtt = qemu_get_sbe16(f); |
| 989 |
tp->t_rttvar = qemu_get_sbe16(f); |
| 990 |
tp->t_rttmin = qemu_get_be16(f); |
| 991 |
tp->max_sndwnd = qemu_get_be32(f); |
| 992 |
tp->t_oobflags = qemu_get_byte(f); |
| 993 |
tp->t_iobc = qemu_get_byte(f); |
| 994 |
tp->t_softerror = qemu_get_sbe16(f); |
| 995 |
tp->snd_scale = qemu_get_byte(f); |
| 996 |
tp->rcv_scale = qemu_get_byte(f); |
| 997 |
tp->request_r_scale = qemu_get_byte(f); |
| 998 |
tp->requested_s_scale = qemu_get_byte(f); |
| 999 |
tp->ts_recent = qemu_get_be32(f); |
| 1000 |
tp->ts_recent_age = qemu_get_be32(f); |
| 1001 |
tp->last_ack_sent = qemu_get_be32(f); |
| 1002 |
tcp_template(tp); |
| 1003 |
} |
| 1004 |
|
| 1005 |
static int slirp_sbuf_load(QEMUFile *f, struct sbuf *sbuf) |
| 1006 |
{
|
| 1007 |
uint32_t off, sb_cc, sb_datalen; |
| 1008 |
|
| 1009 |
sb_cc = qemu_get_be32(f); |
| 1010 |
sb_datalen = qemu_get_be32(f); |
| 1011 |
|
| 1012 |
sbreserve(sbuf, sb_datalen); |
| 1013 |
|
| 1014 |
if (sbuf->sb_datalen != sb_datalen)
|
| 1015 |
return -ENOMEM;
|
| 1016 |
|
| 1017 |
sbuf->sb_cc = sb_cc; |
| 1018 |
|
| 1019 |
off = qemu_get_sbe32(f); |
| 1020 |
sbuf->sb_wptr = sbuf->sb_data + off; |
| 1021 |
off = qemu_get_sbe32(f); |
| 1022 |
sbuf->sb_rptr = sbuf->sb_data + off; |
| 1023 |
qemu_get_buffer(f, (unsigned char*)sbuf->sb_data, sbuf->sb_datalen); |
| 1024 |
|
| 1025 |
return 0; |
| 1026 |
} |
| 1027 |
|
| 1028 |
static int slirp_socket_load(QEMUFile *f, struct socket *so) |
| 1029 |
{
|
| 1030 |
if (tcp_attach(so) < 0) |
| 1031 |
return -ENOMEM;
|
| 1032 |
|
| 1033 |
so->so_urgc = qemu_get_be32(f); |
| 1034 |
so->so_faddr.s_addr = qemu_get_be32(f); |
| 1035 |
so->so_laddr.s_addr = qemu_get_be32(f); |
| 1036 |
so->so_fport = qemu_get_be16(f); |
| 1037 |
so->so_lport = qemu_get_be16(f); |
| 1038 |
so->so_iptos = qemu_get_byte(f); |
| 1039 |
so->so_emu = qemu_get_byte(f); |
| 1040 |
so->so_type = qemu_get_byte(f); |
| 1041 |
so->so_state = qemu_get_be32(f); |
| 1042 |
if (slirp_sbuf_load(f, &so->so_rcv) < 0) |
| 1043 |
return -ENOMEM;
|
| 1044 |
if (slirp_sbuf_load(f, &so->so_snd) < 0) |
| 1045 |
return -ENOMEM;
|
| 1046 |
slirp_tcp_load(f, so->so_tcpcb); |
| 1047 |
|
| 1048 |
return 0; |
| 1049 |
} |
| 1050 |
|
| 1051 |
static int slirp_state_load(QEMUFile *f, void *opaque, int version_id) |
| 1052 |
{
|
| 1053 |
Slirp *slirp = opaque; |
| 1054 |
struct ex_list *ex_ptr;
|
| 1055 |
int r;
|
| 1056 |
|
| 1057 |
while ((r = qemu_get_byte(f))) {
|
| 1058 |
int ret;
|
| 1059 |
struct socket *so = socreate(slirp);
|
| 1060 |
|
| 1061 |
if (!so)
|
| 1062 |
return -ENOMEM;
|
| 1063 |
|
| 1064 |
ret = slirp_socket_load(f, so); |
| 1065 |
|
| 1066 |
if (ret < 0) |
| 1067 |
return ret;
|
| 1068 |
|
| 1069 |
if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) !=
|
| 1070 |
slirp->vnetwork_addr.s_addr) {
|
| 1071 |
return -EINVAL;
|
| 1072 |
} |
| 1073 |
for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) {
|
| 1074 |
if (ex_ptr->ex_pty == 3 && |
| 1075 |
so->so_faddr.s_addr == ex_ptr->ex_addr.s_addr && |
| 1076 |
so->so_fport == ex_ptr->ex_fport) {
|
| 1077 |
break;
|
| 1078 |
} |
| 1079 |
} |
| 1080 |
if (!ex_ptr)
|
| 1081 |
return -EINVAL;
|
| 1082 |
|
| 1083 |
so->extra = (void *)ex_ptr->ex_exec;
|
| 1084 |
} |
| 1085 |
|
| 1086 |
if (version_id >= 2) { |
| 1087 |
slirp->ip_id = qemu_get_be16(f); |
| 1088 |
} |
| 1089 |
|
| 1090 |
return 0; |
| 1091 |
} |