--- /dev/null
+/*
+ * Copyright (c) 1995 Danny Gasparovski.
+ *
+ * Please read the file COPYRIGHT for the
+ * terms and conditions of the copyright.
+ */
+
+#include <slirp.h>
+#include <libslirp.h>
+
+#include "monitor/monitor.h"
+#include "qemu/error-report.h"
+#include "qemu/main-loop.h"
+
+#ifdef DEBUG
+int slirp_debug = DBG_CALL|DBG_MISC|DBG_ERROR;
+#endif
+
+struct quehead {
+ struct quehead *qh_link;
+ struct quehead *qh_rlink;
+};
+
+inline void
+insque(void *a, void *b)
+{
+ register struct quehead *element = (struct quehead *) a;
+ register struct quehead *head = (struct quehead *) b;
+ element->qh_link = head->qh_link;
+ head->qh_link = (struct quehead *)element;
+ element->qh_rlink = (struct quehead *)head;
+ ((struct quehead *)(element->qh_link))->qh_rlink
+ = (struct quehead *)element;
+}
+
+inline void
+remque(void *a)
+{
+ register struct quehead *element = (struct quehead *) a;
+ ((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink;
+ ((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link;
+ element->qh_rlink = NULL;
+}
+
+int add_exec(struct ex_list **ex_ptr, int do_pty, char *exec,
+ struct in_addr addr, int port)
+{
+ struct ex_list *tmp_ptr;
+
+ /* First, check if the port is "bound" */
+ for (tmp_ptr = *ex_ptr; tmp_ptr; tmp_ptr = tmp_ptr->ex_next) {
+ if (port == tmp_ptr->ex_fport &&
+ addr.s_addr == tmp_ptr->ex_addr.s_addr)
+ return -1;
+ }
+
+ tmp_ptr = *ex_ptr;
+ *ex_ptr = g_new(struct ex_list, 1);
+ (*ex_ptr)->ex_fport = port;
+ (*ex_ptr)->ex_addr = addr;
+ (*ex_ptr)->ex_pty = do_pty;
+ (*ex_ptr)->ex_exec = (do_pty == 3) ? exec : g_strdup(exec);
+ (*ex_ptr)->ex_next = tmp_ptr;
+ return 0;
+}
+
+#ifndef HAVE_STRERROR
+
+/*
+ * For systems with no strerror
+ */
+
+extern int sys_nerr;
+extern char *sys_errlist[];
+
+char *
+strerror(error)
+ int error;
+{
+ if (error < sys_nerr)
+ return sys_errlist[error];
+ else
+ return "Unknown error.";
+}
+
+#endif
+
+
+#ifdef _WIN32
+
+int
+fork_exec(struct socket *so, const char *ex, int do_pty)
+{
+ /* not implemented */
+ return 0;
+}
+
+#else
+
+/*
+ * XXX This is ugly
+ * We create and bind a socket, then fork off to another
+ * process, which connects to this socket, after which we
+ * exec the wanted program. If something (strange) happens,
+ * the accept() call could block us forever.
+ *
+ * do_pty = 0 Fork/exec inetd style
+ * do_pty = 1 Fork/exec using slirp.telnetd
+ * do_ptr = 2 Fork/exec using pty
+ */
+int
+fork_exec(struct socket *so, const char *ex, int do_pty)
+{
+ int s;
+ struct sockaddr_in addr;
+ socklen_t addrlen = sizeof(addr);
+ int opt;
+ const char *argv[256];
+ /* don't want to clobber the original */
+ char *bptr;
+ const char *curarg;
+ int c, i, ret;
+ pid_t pid;
+
+ DEBUG_CALL("fork_exec");
+ DEBUG_ARG("so = %lx", (long)so);
+ DEBUG_ARG("ex = %lx", (long)ex);
+ DEBUG_ARG("do_pty = %lx", (long)do_pty);
+
+ if (do_pty == 2) {
+ return 0;
+ } else {
+ addr.sin_family = AF_INET;
+ addr.sin_port = 0;
+ addr.sin_addr.s_addr = INADDR_ANY;
+
+ if ((s = qemu_socket(AF_INET, SOCK_STREAM, 0)) < 0 ||
+ bind(s, (struct sockaddr *)&addr, addrlen) < 0 ||
+ listen(s, 1) < 0) {
+ error_report("Error: inet socket: %s", strerror(errno));
+ closesocket(s);
+
+ return 0;
+ }
+ }
+
+ pid = fork();
+ switch(pid) {
+ case -1:
+ error_report("Error: fork failed: %s", strerror(errno));
+ close(s);
+ return 0;
+
+ case 0:
+ setsid();
+
+ /* Set the DISPLAY */
+ getsockname(s, (struct sockaddr *)&addr, &addrlen);
+ close(s);
+ /*
+ * Connect to the socket
+ * XXX If any of these fail, we're in trouble!
+ */
+ s = qemu_socket(AF_INET, SOCK_STREAM, 0);
+ addr.sin_addr = loopback_addr;
+ do {
+ ret = connect(s, (struct sockaddr *)&addr, addrlen);
+ } while (ret < 0 && errno == EINTR);
+
+ dup2(s, 0);
+ dup2(s, 1);
+ dup2(s, 2);
+ for (s = getdtablesize() - 1; s >= 3; s--)
+ close(s);
+
+ i = 0;
+ bptr = g_strdup(ex); /* No need to free() this */
+ if (do_pty == 1) {
+ /* Setup "slirp.telnetd -x" */
+ argv[i++] = "slirp.telnetd";
+ argv[i++] = "-x";
+ argv[i++] = bptr;
+ } else
+ do {
+ /* Change the string into argv[] */
+ curarg = bptr;
+ while (*bptr != ' ' && *bptr != (char)0)
+ bptr++;
+ c = *bptr;
+ *bptr++ = (char)0;
+ argv[i++] = g_strdup(curarg);
+ } while (c);
+
+ argv[i] = NULL;
+ execvp(argv[0], (char **)argv);
+
+ /* Ooops, failed, let's tell the user why */
+ fprintf(stderr, "Error: execvp of %s failed: %s\n",
+ argv[0], strerror(errno));
+ close(0); close(1); close(2); /* XXX */
+ exit(1);
+
+ default:
+ qemu_add_child_watch(pid);
+ /*
+ * XXX this could block us...
+ * XXX Should set a timer here, and if accept() doesn't
+ * return after X seconds, declare it a failure
+ * The only reason this will block forever is if socket()
+ * of connect() fail in the child process
+ */
+ do {
+ so->s = accept(s, (struct sockaddr *)&addr, &addrlen);
+ } while (so->s < 0 && errno == EINTR);
+ closesocket(s);
+ socket_set_fast_reuse(so->s);
+ opt = 1;
+ qemu_setsockopt(so->s, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(int));
+ qemu_set_nonblock(so->s);
+
+ /* Append the telnet options now */
+ if (so->so_m != NULL && do_pty == 1) {
+ sbappend(so, so->so_m);
+ so->so_m = NULL;
+ }
+
+ return 1;
+ }
+}
+#endif
+
+void slirp_connection_info(Slirp *slirp, Monitor *mon)
+{
+ const char * const tcpstates[] = {
+ [TCPS_CLOSED] = "CLOSED",
+ [TCPS_LISTEN] = "LISTEN",
+ [TCPS_SYN_SENT] = "SYN_SENT",
+ [TCPS_SYN_RECEIVED] = "SYN_RCVD",
+ [TCPS_ESTABLISHED] = "ESTABLISHED",
+ [TCPS_CLOSE_WAIT] = "CLOSE_WAIT",
+ [TCPS_FIN_WAIT_1] = "FIN_WAIT_1",
+ [TCPS_CLOSING] = "CLOSING",
+ [TCPS_LAST_ACK] = "LAST_ACK",
+ [TCPS_FIN_WAIT_2] = "FIN_WAIT_2",
+ [TCPS_TIME_WAIT] = "TIME_WAIT",
+ };
+ struct in_addr dst_addr;
+ struct sockaddr_in src;
+ socklen_t src_len;
+ uint16_t dst_port;
+ struct socket *so;
+ const char *state;
+ char buf[20];
+
+ monitor_printf(mon, " Protocol[State] FD Source Address Port "
+ "Dest. Address Port RecvQ SendQ\n");
+
+ for (so = slirp->tcb.so_next; so != &slirp->tcb; so = so->so_next) {
+ if (so->so_state & SS_HOSTFWD) {
+ state = "HOST_FORWARD";
+ } else if (so->so_tcpcb) {
+ state = tcpstates[so->so_tcpcb->t_state];
+ } else {
+ state = "NONE";
+ }
+ if (so->so_state & (SS_HOSTFWD | SS_INCOMING)) {
+ src_len = sizeof(src);
+ getsockname(so->s, (struct sockaddr *)&src, &src_len);
+ dst_addr = so->so_laddr;
+ dst_port = so->so_lport;
+ } else {
+ src.sin_addr = so->so_laddr;
+ src.sin_port = so->so_lport;
+ dst_addr = so->so_faddr;
+ dst_port = so->so_fport;
+ }
+ snprintf(buf, sizeof(buf), " TCP[%s]", state);
+ monitor_printf(mon, "%-19s %3d %15s %5d ", buf, so->s,
+ src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
+ ntohs(src.sin_port));
+ monitor_printf(mon, "%15s %5d %5d %5d\n",
+ inet_ntoa(dst_addr), ntohs(dst_port),
+ so->so_rcv.sb_cc, so->so_snd.sb_cc);
+ }
+
+ for (so = slirp->udb.so_next; so != &slirp->udb; so = so->so_next) {
+ if (so->so_state & SS_HOSTFWD) {
+ snprintf(buf, sizeof(buf), " UDP[HOST_FORWARD]");
+ src_len = sizeof(src);
+ getsockname(so->s, (struct sockaddr *)&src, &src_len);
+ dst_addr = so->so_laddr;
+ dst_port = so->so_lport;
+ } else {
+ snprintf(buf, sizeof(buf), " UDP[%d sec]",
+ (so->so_expire - curtime) / 1000);
+ src.sin_addr = so->so_laddr;
+ src.sin_port = so->so_lport;
+ dst_addr = so->so_faddr;
+ dst_port = so->so_fport;
+ }
+ monitor_printf(mon, "%-19s %3d %15s %5d ", buf, so->s,
+ src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
+ ntohs(src.sin_port));
+ monitor_printf(mon, "%15s %5d %5d %5d\n",
+ inet_ntoa(dst_addr), ntohs(dst_port),
+ so->so_rcv.sb_cc, so->so_snd.sb_cc);
+ }
+
+ for (so = slirp->icmp.so_next; so != &slirp->icmp; so = so->so_next) {
+ snprintf(buf, sizeof(buf), " ICMP[%d sec]",
+ (so->so_expire - curtime) / 1000);
+ src.sin_addr = so->so_laddr;
+ dst_addr = so->so_faddr;
+ monitor_printf(mon, "%-19s %3d %15s - ", buf, so->s,
+ src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*");
+ monitor_printf(mon, "%15s - %5d %5d\n", inet_ntoa(dst_addr),
+ so->so_rcv.sb_cc, so->so_snd.sb_cc);
+ }
+}
Code Review / kvmfornfv.git / blobdiff