Signed-off-by: S.Çağlar Onur <cag...@10ur.org>
---
src/lxc/lxccontainer.c | 119 +++++++++++++++++++++++++++++++++++++++----------
src/lxc/lxccontainer.h | 1 +
2 files changed, 97 insertions(+), 23 deletions(-)
diff --git a/src/lxc/lxccontainer.c b/src/lxc/lxccontainer.c
index 79237df..14b6942 100644
--- a/src/lxc/lxccontainer.c
+++ b/src/lxc/lxccontainer.c
@@ -1179,23 +1179,26 @@ static bool lxcapi_clear_config_item(struct
lxc_container *c, const char *key)
return ret == 0;
}
-char** lxcapi_get_ips(struct lxc_container *c, char* interface, char* family,
int scope)
-{
- int count = 0;
- struct ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL;
- char addressOutputBuffer[INET6_ADDRSTRLEN];
- void *tempAddrPtr = NULL;
- char **addresses = NULL, **temp;
- char *address = NULL;
+static void exit_from_ns(struct lxc_container *c, int *old_netns, int
*new_netns) {
+ /* Switch back to original netns */
+ if (*old_netns >= 0 && setns(*old_netns, CLONE_NEWNET))
+ SYSERROR("failed to setns");
+ if (*new_netns >= 0)
+ close(*new_netns);
+ if (*old_netns >= 0)
+ close(*old_netns);
+}
+
+static bool enter_to_ns(struct lxc_container *c, int *old_netns, int
*new_netns) {
+ int ret = 0;
char new_netns_path[MAXPATHLEN];
- int old_netns = -1, new_netns = -1, ret = 0;
if (!c->is_running(c))
goto out;
/* Save reference to old netns */
- old_netns = open("/proc/self/ns/net", O_RDONLY);
- if (old_netns < 0) {
+ *old_netns = open("/proc/self/ns/net", O_RDONLY);
+ if (*old_netns < 0) {
SYSERROR("failed to open /proc/self/ns/net");
goto out;
}
@@ -1205,16 +1208,93 @@ char** lxcapi_get_ips(struct lxc_container *c, char*
interface, char* family, in
if (ret < 0 || ret >= MAXPATHLEN)
goto out;
- new_netns = open(new_netns_path, O_RDONLY);
- if (new_netns < 0) {
+ *new_netns = open(new_netns_path, O_RDONLY);
+ if (*new_netns < 0) {
SYSERROR("failed to open %s", new_netns_path);
goto out;
}
- if (setns(new_netns, CLONE_NEWNET)) {
+ if (setns(*new_netns, CLONE_NEWNET)) {
SYSERROR("failed to setns");
goto out;
}
+ return true;
+out:
+ exit_from_ns(c, old_netns, new_netns);
+ return false;
+}
+
+char** lxcapi_get_interfaces(struct lxc_container *c)
+{
+ int count = 0;
+ struct ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL;
+ char **interfaces = NULL, **temp;
+ int old_netns = -1, new_netns = -1;
+
+ if (!enter_to_ns(c, &old_netns, &new_netns))
+ goto out;
+
+ /* Grab the list of interfaces */
+ if (getifaddrs(&interfaceArray)) {
+ SYSERROR("failed to get interfaces list");
+ goto out;
+ }
+
+ /* Iterate through the interfaces */
+ for (tempIfAddr = interfaceArray; tempIfAddr != NULL; tempIfAddr =
tempIfAddr->ifa_next) {
+ if (tempIfAddr->ifa_addr == NULL)
+ continue;
+
+ if(tempIfAddr->ifa_addr->sa_family != AF_PACKET) {
+ continue;
+ }
+
+ count += 1;
+ temp = realloc(interfaces, count * sizeof(*interfaces));
+ if (!temp) {
+ count -= 1;
+ goto out;
+ }
+ interfaces = temp;
+ interfaces[count - 1] = strdup(tempIfAddr->ifa_name);
+ }
+
+out:
+ if(interfaceArray)
+ freeifaddrs(interfaceArray);
+
+ exit_from_ns(c, &old_netns, &new_netns);
+
+ /* Append NULL to the array */
+ if (count) {
+ count++;
+ temp = realloc(interfaces, count * sizeof(*interfaces));
+ if (!temp) {
+ int i;
+ for (i = 0; i < count-1; i++)
+ free(interfaces[i]);
+ free(interfaces);
+ return NULL;
+ }
+ interfaces = temp;
+ interfaces[count - 1] = NULL;
+ }
+
+ return interfaces;
+}
+
+char** lxcapi_get_ips(struct lxc_container *c, char* interface, char* family,
int scope)
+{
+ int count = 0;
+ struct ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL;
+ char addressOutputBuffer[INET6_ADDRSTRLEN];
+ void *tempAddrPtr = NULL;
+ char **addresses = NULL, **temp;
+ char *address = NULL;
+ int old_netns = -1, new_netns = -1;
+
+ if (!enter_to_ns(c, &old_netns, &new_netns))
+ goto out;
/* Grab the list of interfaces */
if (getifaddrs(&interfaceArray)) {
@@ -1241,8 +1321,6 @@ char** lxcapi_get_ips(struct lxc_container *c, char*
interface, char* family, in
if (interface && strcmp(interface, tempIfAddr->ifa_name))
continue;
- else if (!interface && strcmp("lo", tempIfAddr->ifa_name) == 0)
- continue;
address = (char *)inet_ntop(tempIfAddr->ifa_addr->sa_family,
tempAddrPtr,
@@ -1265,13 +1343,7 @@ out:
if(interfaceArray)
freeifaddrs(interfaceArray);
- /* Switch back to original netns */
- if (old_netns >= 0 && setns(old_netns, CLONE_NEWNET))
- SYSERROR("failed to setns");
- if (new_netns >= 0)
- close(new_netns);
- if (old_netns >= 0)
- close(old_netns);
+ exit_from_ns(c, &old_netns, &new_netns);
/* Append NULL to the array */
if (count) {
@@ -2576,6 +2648,7 @@ struct lxc_container *lxc_container_new(const char *name,
const char *configpath
c->get_config_path = lxcapi_get_config_path;
c->set_config_path = lxcapi_set_config_path;
c->clone = lxcapi_clone;
+ c->get_interfaces = lxcapi_get_interfaces;
c->get_ips = lxcapi_get_ips;
c->attach = lxcapi_attach;
c->attach_run_wait = lxcapi_attach_run_wait;
diff --git a/src/lxc/lxccontainer.h b/src/lxc/lxccontainer.h
index f9ae43b..f17d975 100644
--- a/src/lxc/lxccontainer.h
+++ b/src/lxc/lxccontainer.h
@@ -90,6 +90,7 @@ struct lxc_container {
* the length which was our would be printed. */
int (*get_config_item)(struct lxc_container *c, const char *key, char
*retv, int inlen);
int (*get_keys)(struct lxc_container *c, const char *key, char *retv,
int inlen);
+ char** (*get_interfaces)(struct lxc_container *c);
char** (*get_ips)(struct lxc_container *c, char* interface, char*
family, int scope);
/*
* get_cgroup_item returns the number of bytes read, or an error (<0).
--
1.8.1.2
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