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4ffa6325d1
qemu/slirp/misc.c
Samuel Thibault 4ffa6325d1 slirp: Move g_spawn_async_with_fds_qemu compatibility to slirp/ 
Only slirp actually needs it, and will need it along in libslirp.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2019-02-07 15:49:08 +02:00

323 lines
9.4 KiB
C
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/*
* Copyright (c) 1995 Danny Gasparovski.
*
* Please read the file COPYRIGHT for the
* terms and conditions of the copyright.
*/
#include "qemu/osdep.h"
#include "slirp.h"
#include "libslirp.h"
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;
}
struct gfwd_list *
add_guestfwd(struct gfwd_list **ex_ptr,
SlirpWriteCb write_cb, void *opaque,
struct in_addr addr, int port)
{
struct gfwd_list *f = g_new0(struct gfwd_list, 1);
f->write_cb = write_cb;
f->opaque = opaque;
f->ex_fport = port;
f->ex_addr = addr;
f->ex_next = *ex_ptr;
*ex_ptr = f;
return f;
}
struct gfwd_list *
add_exec(struct gfwd_list **ex_ptr, const char *cmdline,
struct in_addr addr, int port)
{
struct gfwd_list *f = add_guestfwd(ex_ptr, NULL, NULL, addr, port);
f->ex_exec = g_strdup(cmdline);
return f;
}
static int
slirp_socketpair_with_oob(int sv[2])
{
struct sockaddr_in addr = {
.sin_family = AF_INET,
.sin_port = 0,
.sin_addr.s_addr = INADDR_ANY,
};
socklen_t addrlen = sizeof(addr);
int ret, s;
sv[1] = -1;
s = slirp_socket(AF_INET, SOCK_STREAM, 0);
if (s < 0 || bind(s, (struct sockaddr *)&addr, addrlen) < 0 ||
listen(s, 1) < 0 ||
getsockname(s, (struct sockaddr *)&addr, &addrlen) < 0) {
goto err;
}
sv[1] = slirp_socket(AF_INET, SOCK_STREAM, 0);
if (sv[1] < 0) {
goto err;
}
/*
* This connect won't block because we've already listen()ed on
* the server end (even though we won't accept() the connection
* until later on).
*/
do {
ret = connect(sv[1], (struct sockaddr *)&addr, addrlen);
} while (ret < 0 && errno == EINTR);
if (ret < 0) {
goto err;
}
do {
sv[0] = accept(s, (struct sockaddr *)&addr, &addrlen);
} while (sv[0] < 0 && errno == EINTR);
if (sv[0] < 0) {
goto err;
}
slirp_closesocket(s);
return 0;
err:
g_critical("slirp_socketpair(): %s", strerror(errno));
if (s >= 0) {
slirp_closesocket(s);
}
if (sv[1] >= 0) {
slirp_closesocket(sv[1]);
}
return -1;
}
static void
fork_exec_child_setup(gpointer data)
{
#ifndef _WIN32
setsid();
#endif
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#if !GLIB_CHECK_VERSION(2, 58, 0)
typedef struct SlirpGSpawnFds {
GSpawnChildSetupFunc child_setup;
gpointer user_data;
gint stdin_fd;
gint stdout_fd;
gint stderr_fd;
} SlirpGSpawnFds;
static inline void
slirp_gspawn_fds_setup(gpointer user_data)
{
SlirpGSpawnFds *q = (SlirpGSpawnFds *)user_data;
dup2(q->stdin_fd, 0);
dup2(q->stdout_fd, 1);
dup2(q->stderr_fd, 2);
q->child_setup(q->user_data);
}
#endif
static inline gboolean
g_spawn_async_with_fds_slirp(const gchar *working_directory,
gchar **argv,
gchar **envp,
GSpawnFlags flags,
GSpawnChildSetupFunc child_setup,
gpointer user_data,
GPid *child_pid,
gint stdin_fd,
gint stdout_fd,
gint stderr_fd,
GError **error)
{
#if GLIB_CHECK_VERSION(2, 58, 0)
return g_spawn_async_with_fds(working_directory, argv, envp, flags,
child_setup, user_data,
child_pid, stdin_fd, stdout_fd, stderr_fd,
error);
#else
SlirpGSpawnFds setup = {
.child_setup = child_setup,
.user_data = user_data,
.stdin_fd = stdin_fd,
.stdout_fd = stdout_fd,
.stderr_fd = stderr_fd,
};
return g_spawn_async(working_directory, argv, envp, flags,
slirp_gspawn_fds_setup, &setup,
child_pid, error);
#endif
}
#define g_spawn_async_with_fds(wd, argv, env, f, c, d, p, ifd, ofd, efd, err) \
g_spawn_async_with_fds_slirp(wd, argv, env, f, c, d, p, ifd, ofd, efd, err)
#pragma GCC diagnostic pop
int
fork_exec(struct socket *so, const char *ex)
{
GError *err = NULL;
char **argv;
int opt, sp[2];
DEBUG_CALL("fork_exec");
DEBUG_ARG("so = %p", so);
DEBUG_ARG("ex = %p", ex);
if (slirp_socketpair_with_oob(sp) < 0) {
return 0;
}
argv = g_strsplit(ex, " ", -1);
g_spawn_async_with_fds(NULL /* cwd */,
argv,
NULL /* env */,
G_SPAWN_SEARCH_PATH,
fork_exec_child_setup, NULL /* data */,
NULL /* child_pid */,
sp[1], sp[1], sp[1],
&err);
g_strfreev(argv);
if (err) {
g_critical("fork_exec: %s", err->message);
g_error_free(err);
slirp_closesocket(sp[0]);
slirp_closesocket(sp[1]);
return 0;
}
so->s = sp[0];
slirp_closesocket(sp[1]);
slirp_socket_set_fast_reuse(so->s);
opt = 1;
slirp_setsockopt(so->s, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(int));
slirp_set_nonblock(so->s);
so->slirp->cb->register_poll_fd(so->s);
return 1;
}
char *slirp_connection_info(Slirp *slirp)
{
GString *str = g_string_new(NULL);
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];
g_string_append_printf(str,
" 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);
g_string_append_printf(str, "%-19s %3d %15s %5d ", buf, so->s,
src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
ntohs(src.sin_port));
g_string_append_printf(str, "%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;
}
g_string_append_printf(str, "%-19s %3d %15s %5d ", buf, so->s,
src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
ntohs(src.sin_port));
g_string_append_printf(str, "%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;
g_string_append_printf(str, "%-19s %3d %15s - ", buf, so->s,
src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*");
g_string_append_printf(str, "%15s - %5d %5d\n", inet_ntoa(dst_addr),
so->so_rcv.sb_cc, so->so_snd.sb_cc);
}
return g_string_free(str, FALSE);
}
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