/**
* Unpack a message whack received
*
* @param wp The whack message
* @return err_t
*/
err_t unpack_whack_msg (struct whackpacker *wp)
{
err_t ugh = NULL;
if (wp->str_next > wp->str_roof)
{
ugh = builddiag("ignoring truncated message from whack: got %d bytes; expected %u"
, (int) wp->n, (unsigned) sizeof(wp->msg));
}
if (!unpack_str(wp, &wp->msg->name) /* string 1 */
|| !unpack_str(wp, &wp->msg->left.id) /* string 2 */
|| !unpack_str(wp, &wp->msg->left.cert) /* string 3 */
|| !unpack_str(wp, &wp->msg->left.ca) /* string 4 */
|| !unpack_str(wp, &wp->msg->left.groups) /* string 5 */
|| !unpack_str(wp, &wp->msg->left.updown) /* string 6 */
|| !unpack_str(wp, &wp->msg->left.virt) /* string 7 */
|| !unpack_str(wp, &wp->msg->right.id) /* string 8 */
|| !unpack_str(wp, &wp->msg->right.cert) /* string 9 */
|| !unpack_str(wp, &wp->msg->right.ca) /* string 10 */
|| !unpack_str(wp, &wp->msg->right.groups)/* string 11 */
|| !unpack_str(wp, &wp->msg->right.updown)/* string 12 */
|| !unpack_str(wp, &wp->msg->right.virt) /* string 13 */
|| !unpack_str(wp, &wp->msg->keyid) /* string 14 */
|| !unpack_str(wp, &wp->msg->myid) /* string 15 */
|| !unpack_str(wp, &wp->msg->ike) /* string 16 */
|| !unpack_str(wp, &wp->msg->esp) /* string 17 */
|| !unpack_str(wp, &wp->msg->tpmeval) /* string 18 */
|| !unpack_str(wp, &wp->msg->left.xauth_name) /* string 19 */
|| !unpack_str(wp, &wp->msg->right.xauth_name) /* string 20 */
|| !unpack_str(wp, &wp->msg->connalias) /* string 21 */
|| !unpack_str(wp, &wp->msg->left.host_addr_name) /* string 22 */
|| !unpack_str(wp, &wp->msg->right.host_addr_name) /* string 23 */
|| !unpack_str(wp, &wp->msg->string1) /* string 24 */
|| !unpack_str(wp, &wp->msg->string2) /* string 25 */
|| !unpack_str(wp, &wp->msg->string3) /* string 26 */
|| !unpack_str(wp, &wp->msg->dnshostname) /* string 27 ? */
#ifdef HAVE_LABELED_IPSEC
|| !unpack_str(wp, &wp->msg->policy_label) /* string 28 */
#endif
|| wp->str_roof - wp->str_next != (ptrdiff_t)wp->msg->keyval.len) /* check chunk */
{
ugh = "message from whack contains bad string";
}
return ugh;
}
/*******************************************************************************
函数名称: init_ws_ctl_socket
功能描述: 初始化web_services control套接字
输入参数:
输出参数: 无
返 回 值 : err_t:返回错误信息,成功返回NULL
--------------------------------------------------------------------------------
最近一次修改记录 :
修改作者: tiangu
修改目的: 创建新函数
修改日期: 2010-4-20
*******************************************************************************/
err_t init_ws_ctl_socket(void)
{
err_t failed = NULL;
delete_ws_ctl_socket(); /* preventative medicine */
ws_ctl_fd = safe_socket(AF_UNIX, SOCK_STREAM, 0);
int size = offsetof(struct sockaddr_un, sun_path) + strlen(ws_ctl_addr.sun_path);
if (ws_ctl_fd == -1)
{
failed = "create";
}
else if (setsockopt(ws_ctl_fd, SOL_SOCKET, SO_REUSEADDR, (const void *)&on, sizeof(on)) < 0)
{
failed = "setsockopt";
}
else
{
mode_t ou = umask(0);
if (bind(ws_ctl_fd, (struct sockaddr *)&ws_ctl_addr, size) < 0)
{
failed = "bind";
}
umask(ou);
}
if (failed == NULL && listen(ws_ctl_fd, 5) < 0)
{
failed = "listen() on";
}
return failed == NULL? NULL : builddiag("could not %s ws_ctl socket: %d %s"
, failed, errno, strerror(errno));
}
/**
* Unpack a message whack received
*
* @param wp The whack message
* @return err_t
*/
err_t unpack_whack_msg (struct whackpacker *wp)
{
err_t ugh = NULL;
if (wp->str_next > wp->str_roof)
{
ugh = builddiag("ignoring truncated message from whack: got %d bytes; expected %u"
, (int) wp->n, (unsigned) sizeof(wp->msg));
}
if (!unpack_str(wp, &wp->msg->name) /* string 1 */
|| !unpack_str(wp, &wp->msg->left.id) /* string 2 */
|| !unpack_str(wp, &wp->msg->left.cert) /* string 3 */
|| !unpack_str(wp, &wp->msg->left.ca) /* string 4 */
|| !unpack_str(wp, &wp->msg->left.groups) /* string 5 */
|| !unpack_str(wp, &wp->msg->left.updown) /* string 6 */
#ifdef VIRTUAL_IP
|| !unpack_str(wp,&wp->msg->left.virt) /* string 7 */
#endif
|| !unpack_str(wp, &wp->msg->right.id) /* string 8 */
|| !unpack_str(wp, &wp->msg->right.cert) /* string 9 */
|| !unpack_str(wp, &wp->msg->right.ca) /* string 10 */
|| !unpack_str(wp, &wp->msg->right.groups)/* string 11 */
|| !unpack_str(wp, &wp->msg->right.updown)/* string 12 */
#ifdef VIRTUAL_IP
|| !unpack_str(wp, &wp->msg->right.virt) /* string 13 */
#endif
|| !unpack_str(wp, &wp->msg->keyid) /* string 14 */
|| !unpack_str(wp, &wp->msg->myid) /* string 15 */
|| !unpack_str(wp, &wp->msg->ike) /* string 16 */
|| !unpack_str(wp, &wp->msg->esp) /* string 17 */
|| wp->str_roof - wp->str_next != (ptrdiff_t)wp->msg->keyval.len) /* check chunk */
{
ugh = "message from whack contains bad string";
}
return ugh;
}
bool
in_struct(void *struct_ptr, struct_desc *sd
, pb_stream *ins, pb_stream *obj_pbs)
{
err_t ugh = NULL;
u_int8_t *cur = ins->cur;
if (ins->roof - cur < (ptrdiff_t)sd->size) {
ugh = builddiag("not enough room in input packet for %s", sd->name);
} else {
u_int8_t *roof = cur + sd->size; /* may be changed by a length field */
u_int8_t *outp = struct_ptr;
bool immediate = FALSE;
field_desc *fp;
for (fp = sd->fields; ugh == NULL; fp++) {
size_t i = fp->size;
passert(ins->roof - cur >= (ptrdiff_t)i);
passert(cur - ins->cur <= (ptrdiff_t)(sd->size - i));
passert(outp - (cur - ins->cur) == struct_ptr);
#if 0
DBG(DBG_PARSING, DBG_log("%d %s"
, (int) (cur - ins->cur), fp->name == NULL? "" : fp->name));
#endif
switch (fp->field_type) {
case ft_mbz: /* must be zero */
for (; i != 0; i--) {
if (*cur++ != 0) {
ugh = builddiag("byte %d of %s must be zero, but is not"
, (int) (cur - ins->cur), sd->name);
break;
}
*outp++ = '\0'; /* probably redundant */
}
break;
case ft_nat: /* natural number (may be 0) */
case ft_len: /* length of this struct and any following crud */
case ft_lv: /* length/value field of attribute */
case ft_enum: /* value from an enumeration */
case ft_loose_enum: /* value from an enumeration with only some names known */
case ft_af_enum: /* Attribute Format + value from an enumeration */
case ft_set: /* bits representing set */
{
u_int32_t n = 0;
for (; i != 0; i--)
n = (n << BITS_PER_BYTE) | *cur++;
switch (fp->field_type) {
case ft_len: /* length of this struct and any following crud */
case ft_lv: /* length/value field of attribute */
{
u_int32_t len = fp->field_type == ft_len? n
: immediate? sd->size : n + sd->size;
if (len < sd->size) {
ugh = builddiag("%s of %s is smaller than minimum"
, fp->name, sd->name);
} else if (pbs_left(ins) < len) {
ugh = builddiag("%s of %s is larger than can fit"
, fp->name, sd->name);
} else {
roof = ins->cur + len;
}
break;
}
case ft_af_enum: /* Attribute Format + value from an enumeration */
if ((n & ISAKMP_ATTR_AF_MASK) == ISAKMP_ATTR_AF_TV)
immediate = TRUE;
/* FALL THROUGH */
case ft_enum: /* value from an enumeration */
if (enum_name(fp->desc, n) == NULL) {
ugh = builddiag("%s of %s has an unknown value: %lu"
, fp->name, sd->name, (unsigned long)n);
}
/* FALL THROUGH */
case ft_loose_enum: /* value from an enumeration with only some names known */
break;
case ft_set: /* bits representing set */
if (!testset(fp->desc, n)) {
ugh = builddiag("bitset %s of %s has unknown member(s): %s"
, fp->name, sd->name, bitnamesof(fp->desc, n));
}
break;
default:
break;
}
i = fp->size;
switch (i) {
case 8/BITS_PER_BYTE:
*(u_int8_t *)outp = n;
break;
case 16/BITS_PER_BYTE:
*(u_int16_t *)outp = n;
break;
case 32/BITS_PER_BYTE:
*(u_int32_t *)outp = n;
break;
default:
impossible();
}
outp += i;
break;
}
case ft_raw: /* bytes to be left in network-order */
for (; i != 0; i--) {
*outp++ = *cur++;
}
break;
case ft_end: /* end of field list */
passert(cur == ins->cur + sd->size);
if (obj_pbs != NULL) {
init_pbs(obj_pbs, ins->cur, roof - ins->cur, sd->name);
obj_pbs->container = ins;
obj_pbs->desc = sd;
obj_pbs->cur = cur;
}
ins->cur = roof;
DBG(DBG_PARSING
, DBG_prefix_print_struct(ins, "parse ", struct_ptr, sd, TRUE));
return TRUE;
default:
impossible();
}
}
}
/* some failure got us here: report it */
loglog(RC_LOG_SERIOUS, ugh);
return FALSE;
}
/* Handle a kernel request. Supposedly, there's a message in
* the kernelsock socket.
*/
void
whack_handle(int whackctlfd)
{
struct whack_message msg;
struct sockaddr_un whackaddr;
int whackaddrlen = sizeof(whackaddr);
int whackfd = accept(whackctlfd, (struct sockaddr *)&whackaddr, &whackaddrlen);
ssize_t n;
if (whackfd < 0)
{
log_errno((e, "accept() failed in whack_handle()"));
return;
}
n = read(whackfd, &msg, sizeof(msg));
if (n == -1)
{
log_errno((e, "read() failed in whack_handle()"));
close(whackfd);
return;
}
whack_log_fd = whackfd;
/* sanity check message */
{
err_t ugh = NULL;
next_str = msg.string;
str_roof = (char *)&msg + n;
if (next_str > str_roof)
{
ugh = builddiag("truncated message from whack: got %d bytes; expected %d. Message ignored."
, n, (int) sizeof(msg));
}
else if (msg.magic != WHACK_MAGIC)
{
ugh = builddiag("message from whack has bad magic %d; should be %d; probably wrong version. Message ignored"
, msg.magic, WHACK_MAGIC);
}
else if (!unpack_str(&msg.name) /* string 1 */
|| !unpack_str(&msg.left.id) /* string 2 */
|| !unpack_str(&msg.left.cert) /* string 3 */
|| !unpack_str(&msg.left.updown) /* string 4 */
#ifdef VIRTUAL_IP
|| !unpack_str(&msg.left.virt)
#endif
|| !unpack_str(&msg.right.id) /* string 5 */
|| !unpack_str(&msg.right.cert) /* string 6 */
|| !unpack_str(&msg.right.updown) /* string 7 */
#ifdef VIRTUAL_IP
|| !unpack_str(&msg.right.virt)
#endif
|| !unpack_str(&msg.keyid) /* string 8 */
|| !unpack_str(&msg.ike) /* string 9 */
|| !unpack_str(&msg.esp) /* string 10 */
|| !unpack_str(&msg.dnshostname) /* string 11 */
|| str_roof - next_str != (ptrdiff_t)msg.keyval.len) /* check chunk */
{
ugh = "message from whack contains bad string";
}
else
{
msg.keyval.ptr = next_str; /* grab chunk */
}
if (ugh != NULL)
{
loglog(RC_BADWHACKMESSAGE, "%s", ugh);
whack_log_fd = NULL_FD;
close(whackfd);
return;
}
}
if (msg.whack_options)
{
#ifdef DEBUG
if (msg.name == NULL)
{
/* we do a two-step so that if either old or new would
* cause the message to print, it will be printed.
*/
cur_debugging |= msg.debugging;
DBG(DBG_CONTROL
, DBG_log("base debugging = %s"
, bitnamesof(debug_bit_names, msg.debugging)));
cur_debugging = base_debugging = msg.debugging;
}
else if (!msg.whack_connection)
{
struct connection *c = con_by_name(msg.name, TRUE);
if (c != NULL)
{
c->extra_debugging = msg.debugging;
DBG(DBG_CONTROL
, DBG_log("\"%s\" extra_debugging = %s"
, c->name
, bitnamesof(debug_bit_names, c->extra_debugging)));
}
}
#endif
}
/* Deleting combined with adding a connection works as replace.
* To make this more useful, in only this combination,
* delete will silently ignore the lack of the connection.
*/
if (msg.whack_delete)
{
struct connection *c = con_by_name(msg.name, !msg.whack_connection);
/* note: this is a "while" because road warrior
* leads to multiple connections with the same name.
*/
for (; c != NULL; c = con_by_name(msg.name, FALSE))
delete_connection(c);
}
if (msg.whack_deletestate)
{
struct state *st = state_with_serialno(msg.whack_deletestateno);
if (st == NULL)
{
loglog(RC_UNKNOWN_NAME, "no state #%lu to delete"
, msg.whack_deletestateno);
}
else
{
delete_state(st);
}
}
if (msg.whack_connection)
add_connection(&msg);
/* process "listen" before any operation that could require it */
if (msg.whack_listen)
{
log("listening for IKE messages");
listening = TRUE;
find_ifaces();
load_preshared_secrets();
}
if (msg.whack_unlisten)
{
log("no longer listening for IKE messages");
listening = FALSE;
}
if (msg.whack_reread & REREAD_SECRETS)
{
load_preshared_secrets();
}
if (msg.whack_reread & REREAD_MYCERT)
{
load_mycert();
}
if (msg.whack_reread & REREAD_CACERTS)
{
load_cacerts();
}
if (msg.whack_reread & REREAD_CRLS)
{
load_crls();
}
if (msg.whack_list & LIST_PUBKEYS)
{
list_public_keys(msg.whack_utc);
}
if (msg.whack_list & LIST_CERTS)
{
list_certs(msg.whack_utc);
}
if (msg.whack_list & LIST_CACERTS)
{
list_cacerts(msg.whack_utc);
}
if (msg.whack_list & LIST_CRLS)
{
list_crls(msg.whack_utc);
}
if (msg.whack_key)
{
/* add a public key */
struct id keyid;
err_t ugh = atoid(msg.keyid, &keyid);
if (ugh != NULL)
{
loglog(RC_BADID, "bad --keyid \"%s\": %s", msg.keyid, ugh);
}
else
{
if (!msg.whack_addkey)
delete_public_keys(&keyid, msg.pubkey_alg);
if (msg.keyval.len == 0)
{
struct key_add_continuation *kc
= alloc_thing(struct key_add_continuation
, "key add continuation");
int wfd = dup_any(whackfd);
kc->whack_fd = wfd;
ugh = start_adns_query(&keyid
, NULL
, T_KEY
, key_add_continue
, &kc->ac);
if (ugh != NULL)
{
key_add_ugh(&keyid, ugh);
close_any(wfd);
}
}
else
{
ugh = add_public_key(&keyid, DAL_LOCAL, msg.pubkey_alg
, &msg.keyval, &pubkeys);
if (ugh != NULL)
loglog(RC_LOG_SERIOUS, "%s", ugh);
}
}
}
