2008-10-17 21:31:57 +04:00
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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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2004-04-22 04:10:48 +04:00
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#include "slirp.h"
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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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/* address for slirp virtual addresses */
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struct in_addr special_addr;
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2006-05-03 23:58:17 +04:00
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/* virtual address alias for host */
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struct in_addr alias_addr;
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2004-04-22 04:10:48 +04:00
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2007-10-26 23:01:16 +04:00
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static const uint8_t special_ethaddr[6] = {
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2004-04-22 04:10:48 +04:00
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0x52, 0x54, 0x00, 0x12, 0x35, 0x00
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};
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2008-10-17 21:28:58 +04:00
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/* ARP cache for the guest IP addresses (XXX: allow many entries) */
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2004-04-22 04:10:48 +04:00
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uint8_t client_ethaddr[6];
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2008-10-17 21:28:58 +04:00
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static struct in_addr client_ipaddr;
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static const uint8_t zero_ethaddr[6] = { 0, 0, 0, 0, 0, 0 };
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2004-04-22 04:10:48 +04:00
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int do_slowtimo;
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int link_up;
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struct timeval tt;
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FILE *lfd;
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2004-09-06 03:10:26 +04:00
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struct ex_list *exec_list;
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2004-04-22 04:10:48 +04:00
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/* XXX: suppress those select globals */
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fd_set *global_readfds, *global_writefds, *global_xfds;
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2006-05-01 01:34:15 +04:00
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char slirp_hostname[33];
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2006-04-16 15:06:58 +04:00
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2004-04-22 04:10:48 +04:00
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#ifdef _WIN32
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static int get_dns_addr(struct in_addr *pdns_addr)
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{
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2004-07-13 02:33:07 +04:00
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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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2007-09-17 12:09:54 +04:00
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2004-07-13 02:33:07 +04:00
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FixedInfo = (FIXED_INFO *)GlobalAlloc(GPTR, sizeof(FIXED_INFO));
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BufLen = sizeof(FIXED_INFO);
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2007-09-17 12:09:54 +04:00
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2004-07-13 02:33:07 +04:00
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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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2007-09-17 01:08:06 +04:00
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2004-07-13 02:33:07 +04:00
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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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2007-09-17 12:09:54 +04:00
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2004-07-13 02:33:07 +04:00
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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 0
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printf( "DNS Servers:\n" );
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printf( "DNS Addr:%s\n", pIPAddr->IpAddress.String );
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2007-09-17 12:09:54 +04:00
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2004-07-13 02:33:07 +04:00
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pIPAddr = FixedInfo -> DnsServerList.Next;
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while ( pIPAddr ) {
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printf( "DNS Addr:%s\n", pIPAddr ->IpAddress.String );
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pIPAddr = pIPAddr ->Next;
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}
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#endif
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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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2004-04-22 04:10:48 +04:00
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}
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#else
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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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2008-08-21 21:58:08 +04:00
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char buff2[257];
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2004-04-22 04:10:48 +04:00
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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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2007-09-17 12:09:54 +04:00
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2004-04-22 04:10:48 +04:00
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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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2007-10-26 22:42:59 +04:00
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#ifdef DEBUG
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2004-04-22 04:10:48 +04:00
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lprint("IP address of your DNS(s): ");
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2007-10-26 22:42:59 +04:00
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#endif
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2004-04-22 04:10:48 +04:00
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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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2007-10-26 22:42:59 +04:00
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#ifdef DEBUG
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2004-04-22 04:10:48 +04:00
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else
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lprint(", ");
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2007-10-26 22:42:59 +04:00
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#endif
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2004-04-22 04:10:48 +04:00
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if (++found > 3) {
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2007-10-26 22:42:59 +04:00
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#ifdef DEBUG
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2004-04-22 04:10:48 +04:00
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lprint("(more)");
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2007-10-26 22:42:59 +04:00
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#endif
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2004-04-22 04:10:48 +04:00
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break;
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2007-10-26 22:42:59 +04:00
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}
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#ifdef DEBUG
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else
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2004-04-22 04:10:48 +04:00
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lprint("%s", inet_ntoa(tmp_addr));
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2007-10-26 22:42:59 +04:00
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#endif
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2004-04-22 04:10:48 +04:00
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}
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}
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2004-07-06 01:18:42 +04:00
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fclose(f);
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2004-04-22 04:10:48 +04:00
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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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#endif
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2004-07-13 02:33:07 +04:00
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#ifdef _WIN32
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2007-10-26 23:01:16 +04:00
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static void slirp_cleanup(void)
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2004-07-13 02:33:07 +04:00
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{
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WSACleanup();
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}
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#endif
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2004-04-22 04:10:48 +04:00
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void slirp_init(void)
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{
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2004-05-04 07:14:47 +04:00
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// debug_init("/tmp/slirp.log", DEBUG_DEFAULT);
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2007-09-17 12:09:54 +04:00
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2004-07-13 02:33:07 +04:00
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#ifdef _WIN32
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{
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WSADATA Data;
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WSAStartup(MAKEWORD(2,0), &Data);
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atexit(slirp_cleanup);
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}
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#endif
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2004-04-22 04:10:48 +04:00
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link_up = 1;
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if_init();
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ip_init();
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/* Initialise mbufs *after* setting the MTU */
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m_init();
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/* set default addresses */
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inet_aton("127.0.0.1", &loopback_addr);
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if (get_dns_addr(&dns_addr) < 0) {
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2006-04-16 17:02:00 +04:00
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dns_addr = loopback_addr;
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fprintf (stderr, "Warning: No DNS servers found\n");
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2004-04-22 04:10:48 +04:00
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}
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inet_aton(CTL_SPECIAL, &special_addr);
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2006-05-03 23:58:17 +04:00
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alias_addr.s_addr = special_addr.s_addr | htonl(CTL_ALIAS);
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2006-04-23 23:41:17 +04:00
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getouraddr();
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2004-04-22 04:10:48 +04:00
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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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* curtime kept to an accuracy of 1ms
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*/
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2004-07-13 02:33:07 +04:00
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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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_ftime(&tb);
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curtime = (u_int)tb.time * (u_int)1000;
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curtime += (u_int)tb.millitm;
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}
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#else
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2004-04-22 04:10:48 +04:00
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static void updtime(void)
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{
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gettimeofday(&tt, 0);
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2007-09-17 01:08:06 +04:00
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2004-04-22 04:10:48 +04:00
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curtime = (u_int)tt.tv_sec * (u_int)1000;
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curtime += (u_int)tt.tv_usec / (u_int)1000;
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2007-09-17 01:08:06 +04:00
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2004-04-22 04:10:48 +04:00
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if ((tt.tv_usec % 1000) >= 500)
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curtime++;
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}
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2004-07-13 02:33:07 +04:00
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#endif
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2004-04-22 04:10:48 +04:00
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2007-09-17 01:08:06 +04:00
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void slirp_select_fill(int *pnfds,
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2004-04-22 04:10:48 +04:00
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fd_set *readfds, fd_set *writefds, fd_set *xfds)
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{
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struct socket *so, *so_next;
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struct timeval timeout;
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int nfds;
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int tmp_time;
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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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2007-09-17 12:09:54 +04:00
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2004-04-22 04:10:48 +04:00
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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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if (link_up) {
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2007-09-17 01:08:06 +04:00
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/*
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2004-04-22 04:10:48 +04:00
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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 = ((tcb.so_next != &tcb) ||
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((struct ipasfrag *)&ipq != (struct ipasfrag *)ipq.next));
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2007-09-17 12:09:54 +04:00
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2004-04-22 04:10:48 +04:00
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for (so = tcb.so_next; so != &tcb; so = so_next) {
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so_next = so->so_next;
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2007-09-17 12:09:54 +04:00
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2004-04-22 04:10:48 +04:00
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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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2007-09-17 12:09:54 +04:00
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2004-04-22 04:10:48 +04:00
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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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2007-09-17 12:09:54 +04:00
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2004-04-22 04:10:48 +04:00
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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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}
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2007-09-17 12:09:54 +04:00
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2004-04-22 04:10:48 +04:00
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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);
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UPD_NFDS(so->s);
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continue;
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}
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2007-09-17 12:09:54 +04:00
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2004-04-22 04:10:48 +04:00
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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);
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UPD_NFDS(so->s);
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}
|
2007-09-17 12:09:54 +04:00
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2004-04-22 04:10:48 +04:00
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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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*/
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if (CONN_CANFRCV(so) && (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2))) {
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FD_SET(so->s, readfds);
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FD_SET(so->s, xfds);
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UPD_NFDS(so->s);
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}
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}
|
2007-09-17 12:09:54 +04:00
|
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|
2004-04-22 04:10:48 +04:00
|
|
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/*
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* UDP sockets
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*/
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|
for (so = udb.so_next; so != &udb; so = so_next) {
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so_next = so->so_next;
|
2007-09-17 12:09:54 +04:00
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2004-04-22 04:10:48 +04:00
|
|
|
/*
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|
* See if it's timed out
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|
|
|
*/
|
|
|
|
if (so->so_expire) {
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|
|
if (so->so_expire <= curtime) {
|
|
|
|
udp_detach(so);
|
|
|
|
continue;
|
|
|
|
} else
|
|
|
|
do_slowtimo = 1; /* Let socket expire */
|
|
|
|
}
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/*
|
|
|
|
* 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) {
|
|
|
|
FD_SET(so->s, readfds);
|
|
|
|
UPD_NFDS(so->s);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2007-09-17 01:08:06 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/*
|
|
|
|
* Setup timeout to use minimum CPU usage, especially when idle
|
|
|
|
*/
|
2007-09-17 01:08:06 +04:00
|
|
|
|
|
|
|
/*
|
2004-04-22 04:10:48 +04:00
|
|
|
* First, see the timeout needed by *timo
|
|
|
|
*/
|
|
|
|
timeout.tv_sec = 0;
|
|
|
|
timeout.tv_usec = -1;
|
|
|
|
/*
|
|
|
|
* If a slowtimo is needed, set timeout to 500ms from the last
|
|
|
|
* slow timeout. If a fast timeout is needed, set timeout within
|
|
|
|
* 200ms of when it was requested.
|
|
|
|
*/
|
|
|
|
if (do_slowtimo) {
|
|
|
|
/* XXX + 10000 because some select()'s aren't that accurate */
|
|
|
|
timeout.tv_usec = ((500 - (curtime - last_slowtimo)) * 1000) + 10000;
|
|
|
|
if (timeout.tv_usec < 0)
|
|
|
|
timeout.tv_usec = 0;
|
|
|
|
else if (timeout.tv_usec > 510000)
|
|
|
|
timeout.tv_usec = 510000;
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/* Can only fasttimo if we also slowtimo */
|
|
|
|
if (time_fasttimo) {
|
|
|
|
tmp_time = (200 - (curtime - time_fasttimo)) * 1000;
|
|
|
|
if (tmp_time < 0)
|
|
|
|
tmp_time = 0;
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/* Choose the smallest of the 2 */
|
|
|
|
if (tmp_time < timeout.tv_usec)
|
|
|
|
timeout.tv_usec = (u_int)tmp_time;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
*pnfds = nfds;
|
2007-09-17 01:08:06 +04:00
|
|
|
}
|
2004-04-22 04:10:48 +04:00
|
|
|
|
|
|
|
void slirp_select_poll(fd_set *readfds, fd_set *writefds, fd_set *xfds)
|
|
|
|
{
|
|
|
|
struct socket *so, *so_next;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
global_readfds = readfds;
|
|
|
|
global_writefds = writefds;
|
|
|
|
global_xfds = xfds;
|
|
|
|
|
|
|
|
/* Update time */
|
|
|
|
updtime();
|
2007-09-17 01:08:06 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/*
|
2007-09-17 01:08:06 +04:00
|
|
|
* See if anything has timed out
|
2004-04-22 04:10:48 +04:00
|
|
|
*/
|
|
|
|
if (link_up) {
|
2005-09-03 14:45:09 +04:00
|
|
|
if (time_fasttimo && ((curtime - time_fasttimo) >= 2)) {
|
2004-04-22 04:10:48 +04:00
|
|
|
tcp_fasttimo();
|
|
|
|
time_fasttimo = 0;
|
|
|
|
}
|
|
|
|
if (do_slowtimo && ((curtime - last_slowtimo) >= 499)) {
|
|
|
|
ip_slowtimo();
|
|
|
|
tcp_slowtimo();
|
|
|
|
last_slowtimo = curtime;
|
|
|
|
}
|
|
|
|
}
|
2007-09-17 01:08:06 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/*
|
|
|
|
* Check sockets
|
|
|
|
*/
|
|
|
|
if (link_up) {
|
|
|
|
/*
|
|
|
|
* Check TCP sockets
|
|
|
|
*/
|
|
|
|
for (so = tcb.so_next; so != &tcb; so = so_next) {
|
|
|
|
so_next = so->so_next;
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/*
|
|
|
|
* FD_ISSET is meaningless on these sockets
|
|
|
|
* (and they can crash the program)
|
|
|
|
*/
|
|
|
|
if (so->so_state & SS_NOFDREF || so->s == -1)
|
|
|
|
continue;
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/*
|
|
|
|
* Check for URG data
|
|
|
|
* This will soread as well, so no need to
|
|
|
|
* test for readfds below if this succeeds
|
|
|
|
*/
|
|
|
|
if (FD_ISSET(so->s, xfds))
|
|
|
|
sorecvoob(so);
|
|
|
|
/*
|
|
|
|
* Check sockets for reading
|
|
|
|
*/
|
|
|
|
else if (FD_ISSET(so->s, readfds)) {
|
|
|
|
/*
|
|
|
|
* Check for incoming connections
|
|
|
|
*/
|
|
|
|
if (so->so_state & SS_FACCEPTCONN) {
|
|
|
|
tcp_connect(so);
|
|
|
|
continue;
|
|
|
|
} /* else */
|
|
|
|
ret = soread(so);
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/* Output it if we read something */
|
|
|
|
if (ret > 0)
|
|
|
|
tcp_output(sototcpcb(so));
|
|
|
|
}
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/*
|
|
|
|
* Check sockets for writing
|
|
|
|
*/
|
|
|
|
if (FD_ISSET(so->s, writefds)) {
|
|
|
|
/*
|
|
|
|
* Check for non-blocking, still-connecting sockets
|
|
|
|
*/
|
|
|
|
if (so->so_state & SS_ISFCONNECTING) {
|
|
|
|
/* Connected */
|
|
|
|
so->so_state &= ~SS_ISFCONNECTING;
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-10-08 03:27:35 +04:00
|
|
|
ret = send(so->s, &ret, 0, 0);
|
2004-04-22 04:10:48 +04:00
|
|
|
if (ret < 0) {
|
|
|
|
/* XXXXX Must fix, zero bytes is a NOP */
|
|
|
|
if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
|
|
|
errno == EINPROGRESS || errno == ENOTCONN)
|
|
|
|
continue;
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/* else failed */
|
|
|
|
so->so_state = SS_NOFDREF;
|
|
|
|
}
|
|
|
|
/* else so->so_state &= ~SS_ISFCONNECTING; */
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/*
|
|
|
|
* Continue tcp_input
|
|
|
|
*/
|
|
|
|
tcp_input((struct mbuf *)NULL, sizeof(struct ip), so);
|
|
|
|
/* continue; */
|
|
|
|
} else
|
|
|
|
ret = sowrite(so);
|
|
|
|
/*
|
2007-09-17 01:08:06 +04:00
|
|
|
* XXXXX If we wrote something (a lot), there
|
2004-04-22 04:10:48 +04:00
|
|
|
* could be a need for a window update.
|
|
|
|
* In the worst case, the remote will send
|
|
|
|
* a window probe to get things going again
|
|
|
|
*/
|
|
|
|
}
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/*
|
|
|
|
* Probe a still-connecting, non-blocking socket
|
|
|
|
* to check if it's still alive
|
|
|
|
*/
|
|
|
|
#ifdef PROBE_CONN
|
|
|
|
if (so->so_state & SS_ISFCONNECTING) {
|
2004-10-08 03:27:35 +04:00
|
|
|
ret = recv(so->s, (char *)&ret, 0,0);
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
if (ret < 0) {
|
|
|
|
/* XXX */
|
|
|
|
if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
|
|
|
errno == EINPROGRESS || errno == ENOTCONN)
|
|
|
|
continue; /* Still connecting, continue */
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/* else failed */
|
|
|
|
so->so_state = SS_NOFDREF;
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/* tcp_input will take care of it */
|
|
|
|
} else {
|
2004-10-08 03:27:35 +04:00
|
|
|
ret = send(so->s, &ret, 0,0);
|
2004-04-22 04:10:48 +04:00
|
|
|
if (ret < 0) {
|
|
|
|
/* XXX */
|
|
|
|
if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
|
|
|
errno == EINPROGRESS || errno == ENOTCONN)
|
|
|
|
continue;
|
|
|
|
/* else failed */
|
|
|
|
so->so_state = SS_NOFDREF;
|
|
|
|
} else
|
|
|
|
so->so_state &= ~SS_ISFCONNECTING;
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
}
|
|
|
|
tcp_input((struct mbuf *)NULL, sizeof(struct ip),so);
|
|
|
|
} /* SS_ISFCONNECTING */
|
|
|
|
#endif
|
|
|
|
}
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/*
|
|
|
|
* Now UDP sockets.
|
|
|
|
* Incoming packets are sent straight away, they're not buffered.
|
|
|
|
* Incoming UDP data isn't buffered either.
|
|
|
|
*/
|
|
|
|
for (so = udb.so_next; so != &udb; so = so_next) {
|
|
|
|
so_next = so->so_next;
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
if (so->s != -1 && FD_ISSET(so->s, readfds)) {
|
|
|
|
sorecvfrom(so);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2007-09-17 01:08:06 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
/*
|
|
|
|
* See if we can start outputting
|
|
|
|
*/
|
|
|
|
if (if_queued && link_up)
|
|
|
|
if_start();
|
2004-10-08 03:27:35 +04:00
|
|
|
|
|
|
|
/* clear global file descriptor sets.
|
|
|
|
* these reside on the stack in vl.c
|
|
|
|
* so they're unusable if we're not in
|
|
|
|
* slirp_select_fill or slirp_select_poll.
|
|
|
|
*/
|
|
|
|
global_readfds = NULL;
|
|
|
|
global_writefds = NULL;
|
|
|
|
global_xfds = NULL;
|
2004-04-22 04:10:48 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
#define ETH_ALEN 6
|
|
|
|
#define ETH_HLEN 14
|
|
|
|
|
|
|
|
#define ETH_P_IP 0x0800 /* Internet Protocol packet */
|
|
|
|
#define ETH_P_ARP 0x0806 /* Address Resolution packet */
|
|
|
|
|
|
|
|
#define ARPOP_REQUEST 1 /* ARP request */
|
|
|
|
#define ARPOP_REPLY 2 /* ARP reply */
|
|
|
|
|
2007-09-17 01:08:06 +04:00
|
|
|
struct ethhdr
|
2004-04-22 04:10:48 +04:00
|
|
|
{
|
|
|
|
unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
|
|
|
|
unsigned char h_source[ETH_ALEN]; /* source ether addr */
|
|
|
|
unsigned short h_proto; /* packet type ID field */
|
|
|
|
};
|
|
|
|
|
|
|
|
struct arphdr
|
|
|
|
{
|
|
|
|
unsigned short ar_hrd; /* format of hardware address */
|
|
|
|
unsigned short ar_pro; /* format of protocol address */
|
|
|
|
unsigned char ar_hln; /* length of hardware address */
|
|
|
|
unsigned char ar_pln; /* length of protocol address */
|
|
|
|
unsigned short ar_op; /* ARP opcode (command) */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Ethernet looks like this : This bit is variable sized however...
|
|
|
|
*/
|
|
|
|
unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
|
|
|
|
unsigned char ar_sip[4]; /* sender IP address */
|
|
|
|
unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
|
|
|
|
unsigned char ar_tip[4]; /* target IP address */
|
|
|
|
};
|
|
|
|
|
2008-08-18 00:26:25 +04:00
|
|
|
static void arp_input(const uint8_t *pkt, int pkt_len)
|
2004-04-22 04:10:48 +04:00
|
|
|
{
|
|
|
|
struct ethhdr *eh = (struct ethhdr *)pkt;
|
|
|
|
struct arphdr *ah = (struct arphdr *)(pkt + ETH_HLEN);
|
|
|
|
uint8_t arp_reply[ETH_HLEN + sizeof(struct arphdr)];
|
|
|
|
struct ethhdr *reh = (struct ethhdr *)arp_reply;
|
|
|
|
struct arphdr *rah = (struct arphdr *)(arp_reply + ETH_HLEN);
|
|
|
|
int ar_op;
|
2004-09-06 03:10:26 +04:00
|
|
|
struct ex_list *ex_ptr;
|
2004-04-22 04:10:48 +04:00
|
|
|
|
|
|
|
ar_op = ntohs(ah->ar_op);
|
|
|
|
switch(ar_op) {
|
|
|
|
case ARPOP_REQUEST:
|
2004-09-06 03:10:26 +04:00
|
|
|
if (!memcmp(ah->ar_tip, &special_addr, 3)) {
|
2007-09-17 01:08:06 +04:00
|
|
|
if (ah->ar_tip[3] == CTL_DNS || ah->ar_tip[3] == CTL_ALIAS)
|
2004-09-06 03:10:26 +04:00
|
|
|
goto arp_ok;
|
|
|
|
for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) {
|
|
|
|
if (ex_ptr->ex_addr == ah->ar_tip[3])
|
|
|
|
goto arp_ok;
|
|
|
|
}
|
|
|
|
return;
|
|
|
|
arp_ok:
|
2004-04-22 04:10:48 +04:00
|
|
|
/* XXX: make an ARP request to have the client address */
|
|
|
|
memcpy(client_ethaddr, eh->h_source, ETH_ALEN);
|
|
|
|
|
|
|
|
/* ARP request for alias/dns mac address */
|
|
|
|
memcpy(reh->h_dest, pkt + ETH_ALEN, ETH_ALEN);
|
|
|
|
memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 1);
|
|
|
|
reh->h_source[5] = ah->ar_tip[3];
|
|
|
|
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);
|
|
|
|
memcpy(rah->ar_sip, ah->ar_tip, 4);
|
|
|
|
memcpy(rah->ar_tha, ah->ar_sha, ETH_ALEN);
|
|
|
|
memcpy(rah->ar_tip, ah->ar_sip, 4);
|
|
|
|
slirp_output(arp_reply, sizeof(arp_reply));
|
|
|
|
}
|
|
|
|
break;
|
2008-10-17 21:28:58 +04:00
|
|
|
case ARPOP_REPLY:
|
|
|
|
/* reply to request of client mac address ? */
|
|
|
|
if (!memcmp(client_ethaddr, zero_ethaddr, ETH_ALEN) &&
|
|
|
|
!memcmp(ah->ar_sip, &client_ipaddr.s_addr, 4)) {
|
|
|
|
memcpy(client_ethaddr, ah->ar_sha, ETH_ALEN);
|
|
|
|
}
|
|
|
|
break;
|
2004-04-22 04:10:48 +04:00
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void slirp_input(const uint8_t *pkt, int pkt_len)
|
|
|
|
{
|
|
|
|
struct mbuf *m;
|
|
|
|
int proto;
|
|
|
|
|
|
|
|
if (pkt_len < ETH_HLEN)
|
|
|
|
return;
|
2007-09-17 12:09:54 +04:00
|
|
|
|
2004-04-22 04:10:48 +04:00
|
|
|
proto = ntohs(*(uint16_t *)(pkt + 12));
|
|
|
|
switch(proto) {
|
|
|
|
case ETH_P_ARP:
|
|
|
|
arp_input(pkt, pkt_len);
|
|
|
|
break;
|
|
|
|
case ETH_P_IP:
|
|
|
|
m = m_get();
|
|
|
|
if (!m)
|
|
|
|
return;
|
2006-05-10 23:21:58 +04:00
|
|
|
/* Note: we add to align the IP header */
|
|
|
|
m->m_len = pkt_len + 2;
|
|
|
|
memcpy(m->m_data + 2, pkt, pkt_len);
|
2004-04-22 04:10:48 +04:00
|
|
|
|
2006-05-10 23:21:58 +04:00
|
|
|
m->m_data += 2 + ETH_HLEN;
|
|
|
|
m->m_len -= 2 + ETH_HLEN;
|
2004-04-22 04:10:48 +04:00
|
|
|
|
|
|
|
ip_input(m);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* output the IP packet to the ethernet device */
|
|
|
|
void if_encap(const uint8_t *ip_data, int ip_data_len)
|
|
|
|
{
|
|
|
|
uint8_t buf[1600];
|
|
|
|
struct ethhdr *eh = (struct ethhdr *)buf;
|
|
|
|
|
|
|
|
if (ip_data_len + ETH_HLEN > sizeof(buf))
|
|
|
|
return;
|
2008-10-17 21:28:58 +04:00
|
|
|
|
|
|
|
if (!memcmp(client_ethaddr, zero_ethaddr, ETH_ALEN)) {
|
|
|
|
uint8_t arp_req[ETH_HLEN + sizeof(struct arphdr)];
|
|
|
|
struct ethhdr *reh = (struct ethhdr *)arp_req;
|
|
|
|
struct arphdr *rah = (struct arphdr *)(arp_req + ETH_HLEN);
|
|
|
|
const struct ip *iph = (const struct ip *)ip_data;
|
|
|
|
|
|
|
|
/* If the client addr is not known, there is no point in
|
|
|
|
sending the packet to it. Normally the sender should have
|
|
|
|
done an ARP request to get its MAC address. Here we do it
|
|
|
|
in place of sending the packet and we hope that the sender
|
|
|
|
will retry sending its packet. */
|
|
|
|
memset(reh->h_dest, 0xff, ETH_ALEN);
|
|
|
|
memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 1);
|
|
|
|
reh->h_source[5] = CTL_ALIAS;
|
|
|
|
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 - 1);
|
|
|
|
rah->ar_sha[5] = CTL_ALIAS;
|
|
|
|
/* source IP */
|
|
|
|
memcpy(rah->ar_sip, &alias_addr, 4);
|
|
|
|
/* target hw addr (none) */
|
|
|
|
memset(rah->ar_tha, 0, ETH_ALEN);
|
|
|
|
/* target IP */
|
|
|
|
memcpy(rah->ar_tip, &iph->ip_dst, 4);
|
|
|
|
client_ipaddr = iph->ip_dst;
|
|
|
|
slirp_output(arp_req, sizeof(arp_req));
|
|
|
|
} else {
|
|
|
|
memcpy(eh->h_dest, client_ethaddr, ETH_ALEN);
|
|
|
|
memcpy(eh->h_source, special_ethaddr, ETH_ALEN - 1);
|
|
|
|
/* XXX: not correct */
|
|
|
|
eh->h_source[5] = CTL_ALIAS;
|
|
|
|
eh->h_proto = htons(ETH_P_IP);
|
|
|
|
memcpy(buf + sizeof(struct ethhdr), ip_data, ip_data_len);
|
|
|
|
slirp_output(buf, ip_data_len + ETH_HLEN);
|
|
|
|
}
|
2004-04-22 04:10:48 +04:00
|
|
|
}
|
2004-08-26 02:12:49 +04:00
|
|
|
|
2007-09-17 01:08:06 +04:00
|
|
|
int slirp_redir(int is_udp, int host_port,
|
2004-08-26 02:12:49 +04:00
|
|
|
struct in_addr guest_addr, int guest_port)
|
|
|
|
{
|
|
|
|
if (is_udp) {
|
2007-09-17 01:08:06 +04:00
|
|
|
if (!udp_listen(htons(host_port), guest_addr.s_addr,
|
2004-08-26 02:12:49 +04:00
|
|
|
htons(guest_port), 0))
|
|
|
|
return -1;
|
|
|
|
} else {
|
2007-09-17 01:08:06 +04:00
|
|
|
if (!solisten(htons(host_port), guest_addr.s_addr,
|
2004-08-26 02:12:49 +04:00
|
|
|
htons(guest_port), 0))
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
2004-09-06 03:10:26 +04:00
|
|
|
|
2007-09-17 01:08:06 +04:00
|
|
|
int slirp_add_exec(int do_pty, const char *args, int addr_low_byte,
|
2004-09-06 03:10:26 +04:00
|
|
|
int guest_port)
|
|
|
|
{
|
2007-09-17 01:08:06 +04:00
|
|
|
return add_exec(&exec_list, do_pty, (char *)args,
|
2004-09-06 03:10:26 +04:00
|
|
|
addr_low_byte, htons(guest_port));
|
|
|
|
}
|