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Diffstat (limited to 'netlink.c')
-rw-r--r--netlink.c81
1 files changed, 45 insertions, 36 deletions
diff --git a/netlink.c b/netlink.c
index 2b6118b..ca18263 100644
--- a/netlink.c
+++ b/netlink.c
@@ -12,7 +12,6 @@
* Author: Stefano Brivio <sbrivio@redhat.com>
*/
-#define _GNU_SOURCE
#include <sched.h>
#include <string.h>
#include <stddef.h>
@@ -24,7 +23,9 @@
#include <unistd.h>
#include <arpa/inet.h>
#include <netinet/in.h>
-#include <linux/if_ether.h>
+#include <netinet/if_ether.h>
+
+#include <linux/ipv6.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
@@ -38,12 +39,12 @@ static int nl_sock_ns = -1;
static int nl_seq;
/**
- * __nl_sock_init() - Set up netlink sockets in init and target namespace
+ * nl_sock_init_do() - Set up netlink sockets in init and target namespace
* @arg: Execution context
*
* Return: 0
*/
-static int __nl_sock_init(void *arg)
+static int nl_sock_init_do(void *arg)
{
struct sockaddr_nl addr = { .nl_family = AF_NETLINK, };
struct ctx *c = (struct ctx *)arg;
@@ -65,7 +66,7 @@ ns:
}
/**
- * nl_sock_init() - Call __nl_sock_init() and check for failures
+ * nl_sock_init() - Call nl_sock_init_do() and check for failures
* @c: Execution context
*
* Return: -EIO if sockets couldn't be set up, 0 otherwise
@@ -73,11 +74,11 @@ ns:
int nl_sock_init(struct ctx *c)
{
if (c->mode == MODE_PASTA) {
- NS_CALL(__nl_sock_init, c);
+ NS_CALL(nl_sock_init_do, c);
if (nl_sock_ns == -1)
return -EIO;
} else {
- __nl_sock_init(NULL);
+ nl_sock_init_do(NULL);
}
if (nl_sock == -1)
@@ -267,7 +268,7 @@ void nl_route(int ns, unsigned int ifi, sa_family_t af, void *gw)
uint32_t a;
uint8_t end;
} r4;
- };
+ } set;
} req = {
.nlh.nlmsg_type = set ? RTM_NEWROUTE : RTM_GETROUTE,
.nlh.nlmsg_flags = NLM_F_REQUEST,
@@ -290,29 +291,33 @@ void nl_route(int ns, unsigned int ifi, sa_family_t af, void *gw)
if (set) {
if (af == AF_INET6) {
+ size_t rta_len = RTA_LENGTH(sizeof(req.set.r6.d));
+
req.nlh.nlmsg_len = sizeof(req);
- req.r6.rta_dst.rta_type = RTA_DST;
- req.r6.rta_dst.rta_len = RTA_LENGTH(sizeof(req.r6.d));
+ req.set.r6.rta_dst.rta_type = RTA_DST;
+ req.set.r6.rta_dst.rta_len = rta_len;
- memcpy(&req.r6.a, gw, sizeof(req.r6.a));
- req.r6.rta_gw.rta_type = RTA_GATEWAY;
- req.r6.rta_gw.rta_len = RTA_LENGTH(sizeof(req.r6.a));
+ memcpy(&req.set.r6.a, gw, sizeof(req.set.r6.a));
+ req.set.r6.rta_gw.rta_type = RTA_GATEWAY;
+ req.set.r6.rta_gw.rta_len = rta_len;
} else {
- req.nlh.nlmsg_len = offsetof(struct req_t, r4.end);
+ size_t rta_len = RTA_LENGTH(sizeof(req.set.r4.d));
+
+ req.nlh.nlmsg_len = offsetof(struct req_t, set.r4.end);
- req.r4.rta_dst.rta_type = RTA_DST;
- req.r4.rta_dst.rta_len = RTA_LENGTH(sizeof(req.r4.d));
+ req.set.r4.rta_dst.rta_type = RTA_DST;
+ req.set.r4.rta_dst.rta_len = rta_len;
- req.r4.a = *(uint32_t *)gw;
- req.r4.rta_gw.rta_type = RTA_GATEWAY;
- req.r4.rta_gw.rta_len = RTA_LENGTH(sizeof(req.r4.a));
+ req.set.r4.a = *(uint32_t *)gw;
+ req.set.r4.rta_gw.rta_type = RTA_GATEWAY;
+ req.set.r4.rta_gw.rta_len = rta_len;
}
req.rtm.rtm_protocol = RTPROT_BOOT;
req.nlh.nlmsg_flags |= NLM_F_ACK | NLM_F_EXCL | NLM_F_CREATE;
} else {
- req.nlh.nlmsg_len = offsetof(struct req_t, r6);
+ req.nlh.nlmsg_len = offsetof(struct req_t, set.r6);
req.nlh.nlmsg_flags |= NLM_F_DUMP;
}
@@ -376,7 +381,7 @@ void nl_addr(int ns, unsigned int ifi, sa_family_t af,
struct rtattr rta_a;
struct in6_addr a;
} a6;
- };
+ } set;
} req = {
.nlh.nlmsg_type = set ? RTM_NEWADDR : RTM_GETADDR,
.nlh.nlmsg_flags = NLM_F_REQUEST,
@@ -395,22 +400,26 @@ void nl_addr(int ns, unsigned int ifi, sa_family_t af,
if (set) {
if (af == AF_INET6) {
+ size_t rta_len = sizeof(req.set.a6.l);
+
req.nlh.nlmsg_len = sizeof(req);
- memcpy(&req.a6.l, addr, sizeof(req.a6.l));
- req.a6.rta_l.rta_len = RTA_LENGTH(sizeof(req.a6.l));
- req.a4.rta_l.rta_type = IFA_LOCAL;
- memcpy(&req.a6.a, addr, sizeof(req.a6.a));
- req.a6.rta_a.rta_len = RTA_LENGTH(sizeof(req.a6.a));
- req.a6.rta_a.rta_type = IFA_ADDRESS;
+ memcpy(&req.set.a6.l, addr, sizeof(req.set.a6.l));
+ req.set.a6.rta_l.rta_len = rta_len;
+ req.set.a4.rta_l.rta_type = IFA_LOCAL;
+ memcpy(&req.set.a6.a, addr, sizeof(req.set.a6.a));
+ req.set.a6.rta_a.rta_len = rta_len;
+ req.set.a6.rta_a.rta_type = IFA_ADDRESS;
} else {
- req.nlh.nlmsg_len = offsetof(struct req_t, a4.end);
+ size_t rta_len = sizeof(req.set.a4.l);
+
+ req.nlh.nlmsg_len = offsetof(struct req_t, set.a4.end);
- req.a4.l = req.a4.a = *(uint32_t *)addr;
- req.a4.rta_l.rta_len = RTA_LENGTH(sizeof(req.a4.l));
- req.a4.rta_l.rta_type = IFA_LOCAL;
- req.a4.rta_a.rta_len = RTA_LENGTH(sizeof(req.a4.a));
- req.a4.rta_a.rta_type = IFA_ADDRESS;
+ req.set.a4.l = req.set.a4.a = *(uint32_t *)addr;
+ req.set.a4.rta_l.rta_len = rta_len;
+ req.set.a4.rta_l.rta_type = IFA_LOCAL;
+ req.set.a4.rta_a.rta_len = rta_len;
+ req.set.a4.rta_a.rta_type = IFA_ADDRESS;
}
req.ifa.ifa_scope = RT_SCOPE_UNIVERSE;
@@ -475,7 +484,7 @@ void nl_link(int ns, unsigned int ifi, void *mac, int up, int mtu)
union {
unsigned char mac[ETH_ALEN];
unsigned int mtu;
- };
+ } set;
} req = {
.nlh.nlmsg_type = change ? RTM_NEWLINK : RTM_GETLINK,
.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
@@ -494,7 +503,7 @@ void nl_link(int ns, unsigned int ifi, void *mac, int up, int mtu)
if (!MAC_IS_ZERO(mac)) {
req.nlh.nlmsg_len = sizeof(req);
- memcpy(req.mac, mac, ETH_ALEN);
+ memcpy(req.set.mac, mac, ETH_ALEN);
req.rta.rta_type = IFLA_ADDRESS;
req.rta.rta_len = RTA_LENGTH(ETH_ALEN);
nl_req(ns, buf, &req, req.nlh.nlmsg_len);
@@ -503,7 +512,7 @@ void nl_link(int ns, unsigned int ifi, void *mac, int up, int mtu)
if (mtu) {
req.nlh.nlmsg_len = sizeof(req);
- req.mtu = mtu;
+ req.set.mtu = mtu;
req.rta.rta_type = IFLA_MTU;
req.rta.rta_len = RTA_LENGTH(sizeof(unsigned int));
nl_req(ns, buf, &req, req.nlh.nlmsg_len);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 07:18:39 +0000