diff options
author | 2015-08-28 09:58:54 +0800 | |
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committer | 2015-09-01 12:44:00 +0800 | |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/slirp/misc.c | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/slirp/misc.c')
-rw-r--r-- | qemu/slirp/misc.c | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/qemu/slirp/misc.c b/qemu/slirp/misc.c new file mode 100644 index 000000000..578e8b2c1 --- /dev/null +++ b/qemu/slirp/misc.c @@ -0,0 +1,319 @@ +/* + * 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); + } +} |