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/*
* Copyright (c) 2009, Giampaolo Rodola'.
* All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Retrieves per-process open socket connections.
*/
#include <Python.h>
#include <sys/param.h>
#include <sys/user.h>
#include <sys/socketvar.h> // for struct xsocket
#include <sys/un.h>
#include <sys/sysctl.h>
#include <netinet/in.h> // for xinpcb struct
#include <netinet/in_pcb.h>
#include <netinet/tcp_var.h> // for struct xtcpcb
#include <arpa/inet.h> // for inet_ntop()
#include <libutil.h>
#include "../../_psutil_common.h"
#include "../../_psutil_posix.h"
// The tcplist fetching and walking is borrowed from netstat/inet.c.
static char *
psutil_fetch_tcplist(void) {
char *buf;
size_t len;
for (;;) {
if (sysctlbyname("net.inet.tcp.pcblist", NULL, &len, NULL, 0) < 0) {
PyErr_SetFromErrno(PyExc_OSError);
return NULL;
}
buf = malloc(len);
if (buf == NULL) {
PyErr_NoMemory();
return NULL;
}
if (sysctlbyname("net.inet.tcp.pcblist", buf, &len, NULL, 0) < 0) {
free(buf);
PyErr_SetFromErrno(PyExc_OSError);
return NULL;
}
return buf;
}
}
static int
psutil_sockaddr_port(int family, struct sockaddr_storage *ss) {
struct sockaddr_in6 *sin6;
struct sockaddr_in *sin;
if (family == AF_INET) {
sin = (struct sockaddr_in *)ss;
return (sin->sin_port);
}
else {
sin6 = (struct sockaddr_in6 *)ss;
return (sin6->sin6_port);
}
}
static void *
psutil_sockaddr_addr(int family, struct sockaddr_storage *ss) {
struct sockaddr_in6 *sin6;
struct sockaddr_in *sin;
if (family == AF_INET) {
sin = (struct sockaddr_in *)ss;
return (&sin->sin_addr);
}
else {
sin6 = (struct sockaddr_in6 *)ss;
return (&sin6->sin6_addr);
}
}
static socklen_t
psutil_sockaddr_addrlen(int family) {
if (family == AF_INET)
return (sizeof(struct in_addr));
else
return (sizeof(struct in6_addr));
}
static int
psutil_sockaddr_matches(int family, int port, void *pcb_addr,
struct sockaddr_storage *ss) {
if (psutil_sockaddr_port(family, ss) != port)
return (0);
return (memcmp(psutil_sockaddr_addr(family, ss), pcb_addr,
psutil_sockaddr_addrlen(family)) == 0);
}
#if __FreeBSD_version >= 1200026
static struct xtcpcb *
psutil_search_tcplist(char *buf, struct kinfo_file *kif) {
struct xtcpcb *tp;
struct xinpcb *inp;
#else
static struct tcpcb *
psutil_search_tcplist(char *buf, struct kinfo_file *kif) {
struct tcpcb *tp;
struct inpcb *inp;
#endif
struct xinpgen *xig, *oxig;
struct xsocket *so;
oxig = xig = (struct xinpgen *)buf;
for (xig = (struct xinpgen *)((char *)xig + xig->xig_len);
xig->xig_len > sizeof(struct xinpgen);
xig = (struct xinpgen *)((char *)xig + xig->xig_len)) {
#if __FreeBSD_version >= 1200026
tp = (struct xtcpcb *)xig;
inp = &tp->xt_inp;
so = &inp->xi_socket;
#else
tp = &((struct xtcpcb *)xig)->xt_tp;
inp = &((struct xtcpcb *)xig)->xt_inp;
so = &((struct xtcpcb *)xig)->xt_socket;
#endif
if (so->so_type != kif->kf_sock_type ||
so->xso_family != kif->kf_sock_domain ||
so->xso_protocol != kif->kf_sock_protocol)
continue;
if (kif->kf_sock_domain == AF_INET) {
if (!psutil_sockaddr_matches(
AF_INET, inp->inp_lport, &inp->inp_laddr,
#if __FreeBSD_version < 1200031
&kif->kf_sa_local))
#else
&kif->kf_un.kf_sock.kf_sa_local))
#endif
continue;
if (!psutil_sockaddr_matches(
AF_INET, inp->inp_fport, &inp->inp_faddr,
#if __FreeBSD_version < 1200031
&kif->kf_sa_peer))
#else
&kif->kf_un.kf_sock.kf_sa_peer))
#endif
continue;
} else {
if (!psutil_sockaddr_matches(
AF_INET6, inp->inp_lport, &inp->in6p_laddr,
#if __FreeBSD_version < 1200031
&kif->kf_sa_local))
#else
&kif->kf_un.kf_sock.kf_sa_local))
#endif
continue;
if (!psutil_sockaddr_matches(
AF_INET6, inp->inp_fport, &inp->in6p_faddr,
#if __FreeBSD_version < 1200031
&kif->kf_sa_peer))
#else
&kif->kf_un.kf_sock.kf_sa_peer))
#endif
continue;
}
return (tp);
}
return NULL;
}
PyObject *
psutil_proc_net_connections(PyObject *self, PyObject *args) {
// Return connections opened by process.
pid_t pid;
int i;
int cnt;
struct kinfo_file *freep = NULL;
struct kinfo_file *kif;
char *tcplist = NULL;
#if __FreeBSD_version >= 1200026
struct xtcpcb *tcp;
#else
struct tcpcb *tcp;
#endif
PyObject *py_retlist = PyList_New(0);
PyObject *py_tuple = NULL;
PyObject *py_laddr = NULL;
PyObject *py_raddr = NULL;
PyObject *py_af_filter = NULL;
PyObject *py_type_filter = NULL;
PyObject *py_family = NULL;
PyObject *py_type = NULL;
if (py_retlist == NULL)
return NULL;
if (! PyArg_ParseTuple(args, _Py_PARSE_PID "OO", &pid,
&py_af_filter, &py_type_filter))
{
goto error;
}
if (!PySequence_Check(py_af_filter) || !PySequence_Check(py_type_filter)) {
PyErr_SetString(PyExc_TypeError, "arg 2 or 3 is not a sequence");
goto error;
}
errno = 0;
freep = kinfo_getfile(pid, &cnt);
if (freep == NULL) {
psutil_raise_for_pid(pid, "kinfo_getfile()");
goto error;
}
tcplist = psutil_fetch_tcplist();
if (tcplist == NULL) {
PyErr_SetFromErrno(PyExc_OSError);
goto error;
}
for (i = 0; i < cnt; i++) {
int lport, rport, state;
char lip[200], rip[200];
char path[PATH_MAX];
int inseq;
py_tuple = NULL;
py_laddr = NULL;
py_raddr = NULL;
kif = &freep[i];
if (kif->kf_type == KF_TYPE_SOCKET) {
// apply filters
py_family = PyLong_FromLong((long)kif->kf_sock_domain);
inseq = PySequence_Contains(py_af_filter, py_family);
Py_DECREF(py_family);
if (inseq == 0)
continue;
py_type = PyLong_FromLong((long)kif->kf_sock_type);
inseq = PySequence_Contains(py_type_filter, py_type);
Py_DECREF(py_type);
if (inseq == 0)
continue;
// IPv4 / IPv6 socket
if ((kif->kf_sock_domain == AF_INET) ||
(kif->kf_sock_domain == AF_INET6)) {
// fill status
state = PSUTIL_CONN_NONE;
if (kif->kf_sock_type == SOCK_STREAM) {
tcp = psutil_search_tcplist(tcplist, kif);
if (tcp != NULL)
state = (int)tcp->t_state;
}
// build addr and port
inet_ntop(
kif->kf_sock_domain,
psutil_sockaddr_addr(kif->kf_sock_domain,
#if __FreeBSD_version < 1200031
&kif->kf_sa_local),
#else
&kif->kf_un.kf_sock.kf_sa_local),
#endif
lip,
sizeof(lip));
inet_ntop(
kif->kf_sock_domain,
psutil_sockaddr_addr(kif->kf_sock_domain,
#if __FreeBSD_version < 1200031
&kif->kf_sa_peer),
#else
&kif->kf_un.kf_sock.kf_sa_peer),
#endif
rip,
sizeof(rip));
lport = htons(psutil_sockaddr_port(kif->kf_sock_domain,
#if __FreeBSD_version < 1200031
&kif->kf_sa_local));
#else
&kif->kf_un.kf_sock.kf_sa_local));
#endif
rport = htons(psutil_sockaddr_port(kif->kf_sock_domain,
#if __FreeBSD_version < 1200031
&kif->kf_sa_peer));
#else
&kif->kf_un.kf_sock.kf_sa_peer));
#endif
// construct python tuple/list
py_laddr = Py_BuildValue("(si)", lip, lport);
if (!py_laddr)
goto error;
if (rport != 0)
py_raddr = Py_BuildValue("(si)", rip, rport);
else
py_raddr = Py_BuildValue("()");
if (!py_raddr)
goto error;
py_tuple = Py_BuildValue(
"(iiiNNi)",
kif->kf_fd,
kif->kf_sock_domain,
kif->kf_sock_type,
py_laddr,
py_raddr,
state
);
if (!py_tuple)
goto error;
if (PyList_Append(py_retlist, py_tuple))
goto error;
Py_DECREF(py_tuple);
}
// UNIX socket.
// Note: remote path cannot be determined.
else if (kif->kf_sock_domain == AF_UNIX) {
struct sockaddr_un *sun;
#if __FreeBSD_version < 1200031
sun = (struct sockaddr_un *)&kif->kf_sa_local;
#else
sun = (struct sockaddr_un *)&kif->kf_un.kf_sock.kf_sa_local;
#endif
snprintf(
path, sizeof(path), "%.*s",
(int)(sun->sun_len - (sizeof(*sun) - sizeof(sun->sun_path))),
sun->sun_path);
py_laddr = PyUnicode_DecodeFSDefault(path);
if (! py_laddr)
goto error;
py_tuple = Py_BuildValue(
"(iiiOsi)",
kif->kf_fd,
kif->kf_sock_domain,
kif->kf_sock_type,
py_laddr,
"", // raddr can't be determined
PSUTIL_CONN_NONE
);
if (!py_tuple)
goto error;
if (PyList_Append(py_retlist, py_tuple))
goto error;
Py_DECREF(py_tuple);
Py_DECREF(py_laddr);
}
}
}
free(freep);
free(tcplist);
return py_retlist;
error:
Py_XDECREF(py_tuple);
Py_XDECREF(py_laddr);
Py_XDECREF(py_raddr);
Py_DECREF(py_retlist);
if (freep != NULL)
free(freep);
if (tcplist != NULL)
free(tcplist);
return NULL;
}
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