+/* vi: set sw=4 ts=4: */
/*
- * libnetlink.c RTnetlink service routines.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
*
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
*/
#include <sys/socket.h>
-
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-#include <time.h>
-#include <unistd.h>
-
#include <sys/uio.h>
-#include "libnetlink.h"
#include "libbb.h"
+#include "libnetlink.h"
-void rtnl_close(struct rtnl_handle *rth)
-{
- close(rth->fd);
-}
-
-int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions)
+void FAST_FUNC xrtnl_open(struct rtnl_handle *rth/*, unsigned subscriptions*/)
{
- int addr_len;
-
- memset(rth, 0, sizeof(rth));
+ socklen_t addr_len;
- rth->fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
- if (rth->fd < 0) {
- bb_perror_msg("Cannot open netlink socket");
- return -1;
- }
-
- memset(&rth->local, 0, sizeof(rth->local));
+ memset(rth, 0, sizeof(*rth));
+ rth->fd = xsocket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
rth->local.nl_family = AF_NETLINK;
- rth->local.nl_groups = subscriptions;
+ /*rth->local.nl_groups = subscriptions;*/
- if (bind(rth->fd, (struct sockaddr*)&rth->local, sizeof(rth->local)) < 0) {
- bb_perror_msg("Cannot bind netlink socket");
- return -1;
- }
+ xbind(rth->fd, (struct sockaddr*)&rth->local, sizeof(rth->local));
addr_len = sizeof(rth->local);
- if (getsockname(rth->fd, (struct sockaddr*)&rth->local, &addr_len) < 0) {
- bb_perror_msg("Cannot getsockname");
- return -1;
- }
- if (addr_len != sizeof(rth->local)) {
- bb_error_msg("Wrong address length %d", addr_len);
- return -1;
- }
- if (rth->local.nl_family != AF_NETLINK) {
- bb_error_msg("Wrong address family %d", rth->local.nl_family);
- return -1;
- }
+ getsockname(rth->fd, (struct sockaddr*)&rth->local, &addr_len);
+
+/* too much paranoia
+ if (getsockname(rth->fd, (struct sockaddr*)&rth->local, &addr_len) < 0)
+ bb_perror_msg_and_die("getsockname");
+ if (addr_len != sizeof(rth->local))
+ bb_error_msg_and_die("wrong address length %d", addr_len);
+ if (rth->local.nl_family != AF_NETLINK)
+ bb_error_msg_and_die("wrong address family %d", rth->local.nl_family);
+*/
rth->seq = time(NULL);
- return 0;
}
-int rtnl_wilddump_request(struct rtnl_handle *rth, int family, int type)
+int FAST_FUNC xrtnl_wilddump_request(struct rtnl_handle *rth, int family, int type)
{
struct {
struct nlmsghdr nlh;
struct rtgenmsg g;
} req;
- struct sockaddr_nl nladdr;
-
- memset(&nladdr, 0, sizeof(nladdr));
- nladdr.nl_family = AF_NETLINK;
req.nlh.nlmsg_len = sizeof(req);
req.nlh.nlmsg_type = type;
req.nlh.nlmsg_seq = rth->dump = ++rth->seq;
req.g.rtgen_family = family;
- return sendto(rth->fd, (void*)&req, sizeof(req), 0, (struct sockaddr*)&nladdr, sizeof(nladdr));
+ return rtnl_send(rth, (void*)&req, sizeof(req));
}
-int rtnl_send(struct rtnl_handle *rth, char *buf, int len)
+//TODO: pass rth->fd instead of full rth?
+int FAST_FUNC rtnl_send(struct rtnl_handle *rth, char *buf, int len)
{
struct sockaddr_nl nladdr;
memset(&nladdr, 0, sizeof(nladdr));
nladdr.nl_family = AF_NETLINK;
- return sendto(rth->fd, buf, len, 0, (struct sockaddr*)&nladdr, sizeof(nladdr));
+ return xsendto(rth->fd, buf, len, (struct sockaddr*)&nladdr, sizeof(nladdr));
}
-int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len)
+int FAST_FUNC rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len)
{
struct nlmsghdr nlh;
struct sockaddr_nl nladdr;
struct iovec iov[2] = { { &nlh, sizeof(nlh) }, { req, len } };
struct msghdr msg = {
(void*)&nladdr, sizeof(nladdr),
- iov, 2,
- NULL, 0,
+ iov, 2,
+ NULL, 0,
0
};
return sendmsg(rth->fd, &msg, 0);
}
-int rtnl_dump_filter(struct rtnl_handle *rth,
- int (*filter)(struct sockaddr_nl *, struct nlmsghdr *n, void *),
- void *arg1,
- int (*junk)(struct sockaddr_nl *,struct nlmsghdr *n, void *),
- void *arg2)
+static int rtnl_dump_filter(struct rtnl_handle *rth,
+ int (*filter)(const struct sockaddr_nl *, struct nlmsghdr *n, void *) FAST_FUNC,
+ void *arg1/*,
+ int (*junk)(struct sockaddr_nl *, struct nlmsghdr *n, void *),
+ void *arg2*/)
{
- char buf[8192];
+ int retval = -1;
+ char *buf = xmalloc(8*1024); /* avoid big stack buffer */
struct sockaddr_nl nladdr;
- struct iovec iov = { buf, sizeof(buf) };
+ struct iovec iov = { buf, 8*1024 };
while (1) {
int status;
struct msghdr msg = {
(void*)&nladdr, sizeof(nladdr),
- &iov, 1,
- NULL, 0,
+ &iov, 1,
+ NULL, 0,
0
};
}
if (status == 0) {
bb_error_msg("EOF on netlink");
- return -1;
+ goto ret;
}
if (msg.msg_namelen != sizeof(nladdr)) {
bb_error_msg_and_die("sender address length == %d", msg.msg_namelen);
while (NLMSG_OK(h, status)) {
int err;
- if (h->nlmsg_pid != rth->local.nl_pid ||
- h->nlmsg_seq != rth->dump) {
- if (junk) {
- err = junk(&nladdr, h, arg2);
- if (err < 0) {
- return err;
- }
- }
+ if (nladdr.nl_pid != 0 ||
+ h->nlmsg_pid != rth->local.nl_pid ||
+ h->nlmsg_seq != rth->dump
+ ) {
+// if (junk) {
+// err = junk(&nladdr, h, arg2);
+// if (err < 0) {
+// retval = err;
+// goto ret;
+// }
+// }
goto skip_it;
}
if (h->nlmsg_type == NLMSG_DONE) {
- return 0;
+ goto ret_0;
}
if (h->nlmsg_type == NLMSG_ERROR) {
struct nlmsgerr *l_err = (struct nlmsgerr*)NLMSG_DATA(h);
errno = -l_err->error;
bb_perror_msg("RTNETLINK answers");
}
- return -1;
+ goto ret;
}
err = filter(&nladdr, h, arg1);
if (err < 0) {
- return err;
+ retval = err;
+ goto ret;
}
-skip_it:
+ skip_it:
h = NLMSG_NEXT(h, status);
}
if (msg.msg_flags & MSG_TRUNC) {
- bb_error_msg("Message truncated");
+ bb_error_msg("message truncated");
continue;
}
if (status) {
- bb_error_msg_and_die("!!!Remnant of size %d", status);
+ bb_error_msg_and_die("remnant of size %d!", status);
}
- }
+ } /* while (1) */
+ ret_0:
+ retval++; /* = 0 */
+ ret:
+ free(buf);
+ return retval;
}
-int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
- unsigned groups, struct nlmsghdr *answer,
- int (*junk)(struct sockaddr_nl *,struct nlmsghdr *n, void *),
- void *jarg)
+int FAST_FUNC xrtnl_dump_filter(struct rtnl_handle *rth,
+ int (*filter)(const struct sockaddr_nl *, struct nlmsghdr *, void *) FAST_FUNC,
+ void *arg1)
{
+ int ret = rtnl_dump_filter(rth, filter, arg1/*, NULL, NULL*/);
+ if (ret < 0)
+ bb_error_msg_and_die("dump terminated");
+ return ret;
+}
+
+int FAST_FUNC rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n,
+ pid_t peer, unsigned groups,
+ struct nlmsghdr *answer,
+ int (*junk)(struct sockaddr_nl *, struct nlmsghdr *, void *),
+ void *jarg)
+{
+/* bbox doesn't use parameters no. 3, 4, 6, 7, they are stubbed out */
+#define peer 0
+#define groups 0
+#define junk NULL
+#define jarg NULL
+ int retval = -1;
int status;
unsigned seq;
struct nlmsghdr *h;
struct sockaddr_nl nladdr;
struct iovec iov = { (void*)n, n->nlmsg_len };
- char buf[8192];
+ char *buf = xmalloc(8*1024); /* avoid big stack buffer */
struct msghdr msg = {
(void*)&nladdr, sizeof(nladdr),
- &iov, 1,
- NULL, 0,
+ &iov, 1,
+ NULL, 0,
0
};
memset(&nladdr, 0, sizeof(nladdr));
nladdr.nl_family = AF_NETLINK;
- nladdr.nl_pid = peer;
- nladdr.nl_groups = groups;
+// nladdr.nl_pid = peer;
+// nladdr.nl_groups = groups;
n->nlmsg_seq = seq = ++rtnl->seq;
if (answer == NULL) {
status = sendmsg(rtnl->fd, &msg, 0);
if (status < 0) {
- bb_perror_msg("Cannot talk to rtnetlink");
- return -1;
+ bb_perror_msg("can't talk to rtnetlink");
+ goto ret;
}
iov.iov_base = buf;
while (1) {
- iov.iov_len = sizeof(buf);
+ iov.iov_len = 8*1024;
status = recvmsg(rtnl->fd, &msg, 0);
if (status < 0) {
}
if (status == 0) {
bb_error_msg("EOF on netlink");
- return -1;
+ goto ret;
}
if (msg.msg_namelen != sizeof(nladdr)) {
bb_error_msg_and_die("sender address length == %d", msg.msg_namelen);
}
- for (h = (struct nlmsghdr*)buf; status >= sizeof(*h); ) {
- int l_err;
+ for (h = (struct nlmsghdr*)buf; status >= (int)sizeof(*h); ) {
+// int l_err;
int len = h->nlmsg_len;
int l = len - sizeof(*h);
- if (l<0 || len>status) {
+ if (l < 0 || len > status) {
if (msg.msg_flags & MSG_TRUNC) {
- bb_error_msg("Truncated message");
- return -1;
+ bb_error_msg("truncated message");
+ goto ret;
}
- bb_error_msg_and_die("!!!malformed message: len=%d", len);
+ bb_error_msg_and_die("malformed message: len=%d!", len);
}
- if (h->nlmsg_pid != rtnl->local.nl_pid ||
- h->nlmsg_seq != seq) {
- if (junk) {
- l_err = junk(&nladdr, h, jarg);
- if (l_err < 0) {
- return l_err;
- }
- }
+ if (nladdr.nl_pid != peer ||
+ h->nlmsg_pid != rtnl->local.nl_pid ||
+ h->nlmsg_seq != seq
+ ) {
+// if (junk) {
+// l_err = junk(&nladdr, h, jarg);
+// if (l_err < 0) {
+// retval = l_err;
+// goto ret;
+// }
+// }
continue;
}
if (h->nlmsg_type == NLMSG_ERROR) {
struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h);
- if (l < sizeof(struct nlmsgerr)) {
+ if (l < (int)sizeof(struct nlmsgerr)) {
bb_error_msg("ERROR truncated");
} else {
- errno = -err->error;
+ errno = - err->error;
if (errno == 0) {
if (answer) {
memcpy(answer, h, h->nlmsg_len);
}
- return 0;
+ goto ret_0;
}
bb_perror_msg("RTNETLINK answers");
}
- return -1;
+ goto ret;
}
if (answer) {
memcpy(answer, h, h->nlmsg_len);
- return 0;
+ goto ret_0;
}
- bb_error_msg("Unexpected reply!!!");
+ bb_error_msg("unexpected reply!");
status -= NLMSG_ALIGN(len);
h = (struct nlmsghdr*)((char*)h + NLMSG_ALIGN(len));
}
if (msg.msg_flags & MSG_TRUNC) {
- bb_error_msg("Message truncated");
+ bb_error_msg("message truncated");
continue;
}
if (status) {
- bb_error_msg_and_die("!!!Remnant of size %d", status);
+ bb_error_msg_and_die("remnant of size %d!", status);
}
- }
+ } /* while (1) */
+ ret_0:
+ retval++; /* = 0 */
+ ret:
+ free(buf);
+ return retval;
}
-int rtnl_listen(struct rtnl_handle *rtnl,
- int (*handler)(struct sockaddr_nl *,struct nlmsghdr *n, void *),
- void *jarg)
-{
- int status;
- struct nlmsghdr *h;
- struct sockaddr_nl nladdr;
- struct iovec iov;
- char buf[8192];
- struct msghdr msg = {
- (void*)&nladdr, sizeof(nladdr),
- &iov, 1,
- NULL, 0,
- 0
- };
-
- memset(&nladdr, 0, sizeof(nladdr));
- nladdr.nl_family = AF_NETLINK;
- nladdr.nl_pid = 0;
- nladdr.nl_groups = 0;
-
-
- iov.iov_base = buf;
-
- while (1) {
- iov.iov_len = sizeof(buf);
- status = recvmsg(rtnl->fd, &msg, 0);
-
- if (status < 0) {
- if (errno == EINTR)
- continue;
- bb_perror_msg("OVERRUN");
- continue;
- }
- if (status == 0) {
- bb_error_msg("EOF on netlink");
- return -1;
- }
- if (msg.msg_namelen != sizeof(nladdr)) {
- bb_error_msg_and_die("Sender address length == %d", msg.msg_namelen);
- }
- for (h = (struct nlmsghdr*)buf; status >= sizeof(*h); ) {
- int err;
- int len = h->nlmsg_len;
- int l = len - sizeof(*h);
-
- if (l<0 || len>status) {
- if (msg.msg_flags & MSG_TRUNC) {
- bb_error_msg("Truncated message");
- return -1;
- }
- bb_error_msg_and_die("!!!malformed message: len=%d", len);
- }
-
- err = handler(&nladdr, h, jarg);
- if (err < 0) {
- return err;
- }
-
- status -= NLMSG_ALIGN(len);
- h = (struct nlmsghdr*)((char*)h + NLMSG_ALIGN(len));
- }
- if (msg.msg_flags & MSG_TRUNC) {
- bb_error_msg("Message truncated");
- continue;
- }
- if (status) {
- bb_error_msg_and_die("!!!Remnant of size %d", status);
- }
- }
-}
-
-int rtnl_from_file(FILE *rtnl,
- int (*handler)(struct sockaddr_nl *,struct nlmsghdr *n, void *),
- void *jarg)
-{
- int status;
- struct sockaddr_nl nladdr;
- char buf[8192];
- struct nlmsghdr *h = (void*)buf;
-
- memset(&nladdr, 0, sizeof(nladdr));
- nladdr.nl_family = AF_NETLINK;
- nladdr.nl_pid = 0;
- nladdr.nl_groups = 0;
-
- while (1) {
- int err, len, type;
- int l;
-
- status = fread(&buf, 1, sizeof(*h), rtnl);
-
- if (status < 0) {
- if (errno == EINTR)
- continue;
- bb_perror_msg("rtnl_from_file: fread");
- return -1;
- }
- if (status == 0)
- return 0;
-
- len = h->nlmsg_len;
- type= h->nlmsg_type;
- l = len - sizeof(*h);
-
- if (l<0 || len>sizeof(buf)) {
- bb_error_msg("!!!malformed message: len=%d @%lu",
- len, ftell(rtnl));
- return -1;
- }
-
- status = fread(NLMSG_DATA(h), 1, NLMSG_ALIGN(l), rtnl);
-
- if (status < 0) {
- bb_perror_msg("rtnl_from_file: fread");
- return -1;
- }
- if (status < l) {
- bb_error_msg("rtnl-from_file: truncated message");
- return -1;
- }
-
- err = handler(&nladdr, h, jarg);
- if (err < 0)
- return err;
- }
-}
-
-int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data)
+int FAST_FUNC addattr32(struct nlmsghdr *n, int maxlen, int type, uint32_t data)
{
int len = RTA_LENGTH(4);
struct rtattr *rta;
- if (NLMSG_ALIGN(n->nlmsg_len) + len > maxlen)
+
+ if ((int)(NLMSG_ALIGN(n->nlmsg_len) + len) > maxlen) {
return -1;
+ }
rta = (struct rtattr*)(((char*)n) + NLMSG_ALIGN(n->nlmsg_len));
rta->rta_type = type;
rta->rta_len = len;
- memcpy(RTA_DATA(rta), &data, 4);
+ move_to_unaligned32(RTA_DATA(rta), data);
n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + len;
return 0;
}
-int addattr_l(struct nlmsghdr *n, int maxlen, int type, void *data, int alen)
+int FAST_FUNC addattr_l(struct nlmsghdr *n, int maxlen, int type, void *data, int alen)
{
int len = RTA_LENGTH(alen);
struct rtattr *rta;
- if (NLMSG_ALIGN(n->nlmsg_len) + len > maxlen)
+ if ((int)(NLMSG_ALIGN(n->nlmsg_len) + len) > maxlen) {
return -1;
+ }
rta = (struct rtattr*)(((char*)n) + NLMSG_ALIGN(n->nlmsg_len));
rta->rta_type = type;
rta->rta_len = len;
return 0;
}
-int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data)
+int FAST_FUNC rta_addattr32(struct rtattr *rta, int maxlen, int type, uint32_t data)
{
int len = RTA_LENGTH(4);
struct rtattr *subrta;
subrta = (struct rtattr*)(((char*)rta) + RTA_ALIGN(rta->rta_len));
subrta->rta_type = type;
subrta->rta_len = len;
- memcpy(RTA_DATA(subrta), &data, 4);
+ move_to_unaligned32(RTA_DATA(subrta), data);
rta->rta_len = NLMSG_ALIGN(rta->rta_len) + len;
return 0;
}
-int rta_addattr_l(struct rtattr *rta, int maxlen, int type, void *data, int alen)
+int FAST_FUNC rta_addattr_l(struct rtattr *rta, int maxlen, int type, void *data, int alen)
{
struct rtattr *subrta;
int len = RTA_LENGTH(alen);
}
-int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len)
+void FAST_FUNC parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len)
{
while (RTA_OK(rta, len)) {
if (rta->rta_type <= max) {
tb[rta->rta_type] = rta;
}
- rta = RTA_NEXT(rta,len);
+ rta = RTA_NEXT(rta, len);
}
if (len) {
- bb_error_msg("!!!Deficit %d, rta_len=%d", len, rta->rta_len);
+ bb_error_msg("deficit %d, rta_len=%d!", len, rta->rta_len);
}
- return 0;
}
projects / oweals / busybox.git / blobdiff