| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20190613072553.20747-1-hoang.h.le@dektech.com.au>
Date: Thu, 13 Jun 2019 14:25:53 +0700
From: Hoang Le <hoang.h.le@...tech.com.au>
To: dsahern@...il.com, jon.maloy@...csson.com, maloy@...jonn.com,
ying.xue@...driver.com, netdev@...r.kernel.org,
tipc-discussion@...ts.sourceforge.net
Subject: [iproute2-next v4] tipc: support interface name when activating UDP bearer
Support for indicating interface name has an ip address in parallel
with specifying ip address when activating UDP bearer.
This liberates the user from keeping track of the current ip address
for each device.
Old command syntax:
$tipc bearer enable media udp name NAME localip IP
New command syntax:
$tipc bearer enable media udp name NAME [localip IP|dev DEVICE]
v2:
- Removed initial value for fd
- Fixed the returning value for cmd_bearer_validate_and_get_addr
to make its consistent with using: zero or non-zero
v3:
- Switch to use helper 'get_ifname' to retrieve interface name
v4:
- Replace legacy SIOCGIFADDR using by netlink
Acked-by: Ying Xue <ying.xue@...driver.com>
Signed-off-by: Hoang Le <hoang.h.le@...tech.com.au>
---
tipc/bearer.c | 89 ++++++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 84 insertions(+), 5 deletions(-)
diff --git a/tipc/bearer.c b/tipc/bearer.c
index 1f3a4d44441e..367ec8a2630f 100644
--- a/tipc/bearer.c
+++ b/tipc/bearer.c
@@ -19,10 +19,12 @@
#include <linux/tipc_netlink.h>
#include <linux/tipc.h>
#include <linux/genetlink.h>
+#include <linux/if.h>
#include <libmnl/libmnl.h>
#include <sys/socket.h>
+#include "utils.h"
#include "cmdl.h"
#include "msg.h"
#include "bearer.h"
@@ -68,7 +70,7 @@ static void cmd_bearer_enable_l2_help(struct cmdl *cmdl, char *media)
static void cmd_bearer_enable_udp_help(struct cmdl *cmdl, char *media)
{
fprintf(stderr,
- "Usage: %s bearer enable [OPTIONS] media %s name NAME localip IP [UDP OPTIONS]\n\n"
+ "Usage: %s bearer enable [OPTIONS] media %s name NAME [localip IP|device DEVICE] [UDP OPTIONS]\n\n"
"OPTIONS\n"
" domain DOMAIN - Discovery domain\n"
" priority PRIORITY - Bearer priority\n\n"
@@ -119,6 +121,71 @@ static int generate_multicast(short af, char *buf, int bufsize)
return 0;
}
+static struct ifreq ifr;
+static int nl_dump_addr_filter(struct nlmsghdr *nlh, void *arg)
+{
+ struct ifaddrmsg *ifa = NLMSG_DATA(nlh);
+ char *r_addr = (char *)arg;
+ int len = nlh->nlmsg_len;
+ struct rtattr *addr_attr;
+
+ if (ifr.ifr_ifindex != ifa->ifa_index)
+ return 0;
+
+ if (strlen(r_addr) > 0)
+ return 1;
+
+ addr_attr = parse_rtattr_one(IFA_ADDRESS, IFA_RTA(ifa),
+ len - NLMSG_LENGTH(sizeof(*ifa)));
+ if (!addr_attr)
+ return 0;
+
+ if (ifa->ifa_family == AF_INET) {
+ struct sockaddr_in ip4addr;
+ memcpy(&ip4addr.sin_addr, RTA_DATA(addr_attr),
+ sizeof(struct in_addr));
+ if (inet_ntop(AF_INET, &ip4addr.sin_addr, r_addr,
+ INET_ADDRSTRLEN) == NULL)
+ return 0;
+ } else if (ifa->ifa_family == AF_INET6) {
+ struct sockaddr_in6 ip6addr;
+ memcpy(&ip6addr.sin6_addr, RTA_DATA(addr_attr),
+ sizeof(struct in6_addr));
+ if (inet_ntop(AF_INET6, &ip6addr.sin6_addr, r_addr,
+ INET6_ADDRSTRLEN) == NULL)
+ return 0;
+ }
+ return 1;
+}
+
+static int cmd_bearer_validate_and_get_addr(const char *name, char *r_addr)
+{
+ struct rtnl_handle rth = { .fd = -1 };
+
+ memset(&ifr, 0, sizeof(ifr));
+ if (!name || !r_addr || get_ifname(ifr.ifr_name, name))
+ return 0;
+
+ ifr.ifr_ifindex = ll_name_to_index(ifr.ifr_name);
+ if (!ifr.ifr_ifindex)
+ return 0;
+
+ /* remove from cache */
+ ll_drop_by_index(ifr.ifr_ifindex);
+
+ if (rtnl_open(&rth, 0) < 0)
+ return 0;
+
+ if (rtnl_addrdump_req(&rth, AF_UNSPEC, 0) < 0)
+ return 0;
+
+ if (rtnl_dump_filter(&rth, nl_dump_addr_filter, r_addr) < 0)
+ return 0;
+
+ rtnl_close(&rth);
+ return 1;
+}
+
static int nl_add_udp_enable_opts(struct nlmsghdr *nlh, struct opt *opts,
struct cmdl *cmdl)
{
@@ -136,13 +203,25 @@ static int nl_add_udp_enable_opts(struct nlmsghdr *nlh, struct opt *opts,
.ai_family = AF_UNSPEC,
.ai_socktype = SOCK_DGRAM
};
+ char addr[INET6_ADDRSTRLEN] = {0};
- if (!(opt = get_opt(opts, "localip"))) {
- fprintf(stderr, "error, udp bearer localip missing\n");
- cmd_bearer_enable_udp_help(cmdl, "udp");
+ opt = get_opt(opts, "device");
+ if (opt && !cmd_bearer_validate_and_get_addr(opt->val, addr)) {
+ fprintf(stderr, "error, no device name available\n");
return -EINVAL;
}
- locip = opt->val;
+
+ if (strlen(addr) > 0) {
+ locip = addr;
+ } else {
+ opt = get_opt(opts, "localip");
+ if (!opt) {
+ fprintf(stderr, "error, udp bearer localip/device missing\n");
+ cmd_bearer_enable_udp_help(cmdl, "udp");
+ return -EINVAL;
+ }
+ locip = opt->val;
+ }
if ((opt = get_opt(opts, "remoteip")))
remip = opt->val;
--
2.17.1
Powered by blists - more mailing lists