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-rw-r--r--src/libsystemd/sd-rtnl/rtnl-message.c76
-rw-r--r--src/libsystemd/sd-rtnl/test-rtnl.c37
-rw-r--r--src/systemd/sd-rtnl.h1
3 files changed, 88 insertions, 26 deletions
diff --git a/src/libsystemd/sd-rtnl/rtnl-message.c b/src/libsystemd/sd-rtnl/rtnl-message.c
index 3cf8579cfc..85c59bfed1 100644
--- a/src/libsystemd/sd-rtnl/rtnl-message.c
+++ b/src/libsystemd/sd-rtnl/rtnl-message.c
@@ -45,6 +45,7 @@ struct sd_rtnl_message {
#define GET_CONTAINER(m, i) (i < (m)->n_containers ? (struct rtattr*)((uint8_t*)(m)->hdr + (m)->container_offsets[i]) : NULL)
#define NEXT_RTA(m) ((struct rtattr*)((uint8_t*)(m)->hdr + (m)->next_rta_offset))
#define UPDATE_RTA(m, new) (m)->next_rta_offset = (uint8_t*)(new) - (uint8_t*)(m)->hdr;
+#define PUSH_CONTAINER(m, new) (m)->container_offsets[(m)->n_containers ++] = (uint8_t*)(new) - (uint8_t*)(m)->hdr;
static int message_new(sd_rtnl_message **ret, size_t initial_size) {
sd_rtnl_message *m;
@@ -378,6 +379,7 @@ static int add_rtattr(sd_rtnl_message *m, unsigned short type, const void *data,
assert(m);
assert(m->hdr);
+ assert(!m->sealed);
assert(NLMSG_ALIGN(m->hdr->nlmsg_len) == m->hdr->nlmsg_len);
assert(!data || data_length > 0);
assert(data || m->n_containers < RTNL_CONTAINER_DEPTH);
@@ -428,6 +430,7 @@ int sd_rtnl_message_append_string(sd_rtnl_message *m, unsigned short type, const
int r;
assert_return(m, -EINVAL);
+ assert_return(!m->sealed, -EPERM);
assert_return(data, -EINVAL);
r = sd_rtnl_message_get_type(m, &rtm_type);
@@ -477,6 +480,7 @@ int sd_rtnl_message_append_u16(sd_rtnl_message *m, unsigned short type, uint16_t
int r;
assert_return(m, -EINVAL);
+ assert_return(!m->sealed, -EPERM);
r = sd_rtnl_message_get_type(m, &rtm_type);
if (r < 0)
@@ -512,6 +516,7 @@ int sd_rtnl_message_append_u32(sd_rtnl_message *m, unsigned short type, uint32_t
int r;
assert_return(m, -EINVAL);
+ assert_return(!m->sealed, -EPERM);
r = sd_rtnl_message_get_type(m, &rtm_type);
if (r < 0)
@@ -563,6 +568,7 @@ int sd_rtnl_message_append_in_addr(sd_rtnl_message *m, unsigned short type, cons
int r;
assert_return(m, -EINVAL);
+ assert_return(!m->sealed, -EPERM);
assert_return(data, -EINVAL);
r = sd_rtnl_message_get_type(m, &rtm_type);
@@ -624,6 +630,7 @@ int sd_rtnl_message_append_in6_addr(sd_rtnl_message *m, unsigned short type, con
int r;
assert_return(m, -EINVAL);
+ assert_return(!m->sealed, -EPERM);
assert_return(data, -EINVAL);
r = sd_rtnl_message_get_type(m, &rtm_type);
@@ -682,6 +689,7 @@ int sd_rtnl_message_append_ether_addr(sd_rtnl_message *m, unsigned short type, c
int r;
assert_return(m, -EINVAL);
+ assert_return(!m->sealed, -EPERM);
assert_return(data, -EINVAL);
sd_rtnl_message_get_type(m, &rtm_type);
@@ -714,6 +722,7 @@ int sd_rtnl_message_open_container(sd_rtnl_message *m, unsigned short type) {
uint16_t rtm_type;
assert_return(m, -EINVAL);
+ assert_return(!m->sealed, -EPERM);
sd_rtnl_message_get_type(m, &rtm_type);
@@ -732,6 +741,7 @@ int sd_rtnl_message_open_container(sd_rtnl_message *m, unsigned short type) {
int sd_rtnl_message_close_container(sd_rtnl_message *m) {
assert_return(m, -EINVAL);
+ assert_return(!m->sealed, -EPERM);
assert_return(m->n_containers > 0, -EINVAL);
m->n_containers --;
@@ -744,34 +754,57 @@ int sd_rtnl_message_read(sd_rtnl_message *m, unsigned short *type, void **data)
uint16_t rtm_type;
int r;
- assert(m);
- assert(m->next_rta_offset);
- assert(type);
- assert(data);
+ assert_return(m, -EINVAL);
+ assert_return(m->sealed, -EPERM);
+ assert_return(m->next_rta_offset, -EINVAL);
+ assert_return(type, -EINVAL);
+ assert_return(data, -EINVAL);
- remaining_size = m->hdr->nlmsg_len - m->next_rta_offset;
+ /* only read until the end of the current container */
+ if (m->n_containers)
+ remaining_size = GET_CONTAINER(m, m->n_containers - 1)->rta_len -
+ (m->next_rta_offset -
+ m->container_offsets[m->n_containers - 1]);
+ else
+ remaining_size = m->hdr->nlmsg_len - m->next_rta_offset;
if (!RTA_OK(NEXT_RTA(m), remaining_size))
return 0;
- /* make sure we don't try to read a container
- * TODO: add support for entering containers for reading */
+ /* if we read a container, enter it and return its type */
r = sd_rtnl_message_get_type(m, &rtm_type);
if (r < 0)
return r;
- if (message_type_is_link(rtm_type) &&
- NEXT_RTA(m)->rta_type == IFLA_LINKINFO)
- return -EINVAL;
-
- *data = RTA_DATA(NEXT_RTA(m));
*type = NEXT_RTA(m)->rta_type;
- UPDATE_RTA(m, RTA_NEXT(NEXT_RTA(m), remaining_size));
+ if (message_type_is_link(rtm_type) &&
+ ((m->n_containers == 0 &&
+ NEXT_RTA(m)->rta_type == IFLA_LINKINFO) ||
+ (m->n_containers == 1 &&
+ GET_CONTAINER(m, 0)->rta_type == IFLA_LINKINFO &&
+ NEXT_RTA(m)->rta_type == IFLA_INFO_DATA))) {
+ *data = NULL;
+ PUSH_CONTAINER(m, NEXT_RTA(m));
+ UPDATE_RTA(m, RTA_DATA(NEXT_RTA(m)));
+ } else {
+ *data = RTA_DATA(NEXT_RTA(m));
+ UPDATE_RTA(m, RTA_NEXT(NEXT_RTA(m), remaining_size));
+ }
return 1;
}
+int sd_rtnl_message_exit_container(sd_rtnl_message *m) {
+ assert_return(m, -EINVAL);
+ assert_return(m->sealed, -EINVAL);
+ assert_return(m->n_containers > 0, -EINVAL);
+
+ m->n_containers --;
+
+ return 0;
+}
+
uint32_t message_get_serial(sd_rtnl_message *m) {
assert(m);
assert(m->hdr);
@@ -794,16 +827,23 @@ int sd_rtnl_message_get_errno(sd_rtnl_message *m) {
}
int message_seal(sd_rtnl *nl, sd_rtnl_message *m) {
- assert(nl);
+ int r;
+
assert(m);
assert(m->hdr);
if (m->sealed)
return -EPERM;
- m->hdr->nlmsg_seq = nl->serial++;
+ if (nl)
+ m->hdr->nlmsg_seq = nl->serial++;
+
m->sealed = true;
+ r = sd_rtnl_message_rewind(m);
+ if (r < 0)
+ return r;
+
return 0;
}
@@ -876,6 +916,9 @@ int socket_read_message(sd_rtnl *nl, sd_rtnl_message **ret) {
if (r < 0)
return r;
+ /* don't allow sealing/appending to received messages */
+ m->sealed = true;
+
addr_len = sizeof(addr);
k = recvfrom(nl->fd, m->hdr, need,
@@ -961,6 +1004,7 @@ int sd_rtnl_message_rewind(sd_rtnl_message *m) {
struct rtmsg *rtm;
assert_return(m, -EINVAL);
+ assert_return(m->sealed, -EPERM);
assert_return(m->hdr, -EINVAL);
switch(m->hdr->nlmsg_type) {
@@ -990,5 +1034,7 @@ int sd_rtnl_message_rewind(sd_rtnl_message *m) {
return -ENOTSUP;
}
+ m->n_containers = 0;
+
return 0;
}
diff --git a/src/libsystemd/sd-rtnl/test-rtnl.c b/src/libsystemd/sd-rtnl/test-rtnl.c
index 98213d6782..a173b0fc61 100644
--- a/src/libsystemd/sd-rtnl/test-rtnl.c
+++ b/src/libsystemd/sd-rtnl/test-rtnl.c
@@ -27,6 +27,7 @@
#include "sd-rtnl.h"
#include "socket-util.h"
#include "rtnl-util.h"
+#include "rtnl-internal.h"
#include "event-util.h"
static void test_link_configure(sd_rtnl *rtnl, int ifindex) {
@@ -42,6 +43,8 @@ static void test_link_configure(sd_rtnl *rtnl, int ifindex) {
assert(sd_rtnl_message_append_ether_addr(message, IFLA_ADDRESS, ether_aton(mac)) >= 0);
assert(sd_rtnl_message_append_u32(message, IFLA_MTU, mtu) >= 0);
+ assert(sd_rtnl_call(rtnl, message, 0, NULL) == 1);
+
assert(sd_rtnl_message_read(message, &type, &data) > 0);
assert(type == IFLA_IFNAME);
assert(streq(name, (char *) data));
@@ -53,8 +56,6 @@ static void test_link_configure(sd_rtnl *rtnl, int ifindex) {
assert(sd_rtnl_message_read(message, &type, &data) > 0);
assert(type == IFLA_MTU);
assert(mtu == *(unsigned int *) data);
-
- assert(sd_rtnl_call(rtnl, message, 0, NULL) == 1);
}
static void test_route(void) {
@@ -85,6 +86,8 @@ static void test_route(void) {
return;
}
+ assert(message_seal(NULL, req) >= 0);
+
assert(sd_rtnl_message_read(req, &type, &data) > 0);
assert(type == RTA_GATEWAY);
assert(((struct in_addr *)data)->s_addr == addr.s_addr);
@@ -224,15 +227,26 @@ static void test_container(void) {
assert(sd_rtnl_message_close_container(m) >= 0);
assert(sd_rtnl_message_close_container(m) == -EINVAL);
- assert(sd_rtnl_message_read(m, &type, &data) == -EINVAL);
+ assert(message_seal(NULL, m) >= 0);
-/* TODO: add support for entering containers
- assert(sd_rtnl_message_read(m, &type, &data) > 0);
+ assert(sd_rtnl_message_read(m, &type, &data) >= 0);
+ assert(type == IFLA_LINKINFO);
+ assert(data == NULL);
+ assert(sd_rtnl_message_read(m, &type, &data) >= 0);
assert(type == IFLA_INFO_KIND);
- assert(streq("kind", (char *) data));
-
- assert(sd_rtnl_message_read(m, &type, &data) == 0);
-*/
+ assert(streq("kind", (char *)data));
+ assert(sd_rtnl_message_read(m, &type, &data) >= 0);
+ assert(type == IFLA_INFO_DATA);
+ assert(data == NULL);
+ assert(sd_rtnl_message_read(m, &type, &data) >= 0);
+ assert(type == IFLA_VLAN_ID);
+ assert(*(uint16_t *)data == 100);
+ assert(sd_rtnl_message_exit_container(m) >= 0);
+ assert(sd_rtnl_message_read(m, &type, &data) >= 0);
+ assert(type == IFLA_INFO_KIND);
+ assert(streq("kind", (char *)data));
+ assert(sd_rtnl_message_exit_container(m) >= 0);
+ assert(sd_rtnl_message_exit_container(m) == -EINVAL);
}
static void test_match(void) {
@@ -286,7 +300,7 @@ int main(void) {
assert(sd_rtnl_message_get_type(m, &type) >= 0);
assert(type == RTM_GETLINK);
- assert(sd_rtnl_message_read(m, &type, &data) == 0);
+ assert(sd_rtnl_message_read(m, &type, &data) == -EPERM);
assert(sd_rtnl_call(rtnl, m, 0, &r) == 1);
assert(sd_rtnl_message_get_type(r, &type) >= 0);
@@ -303,6 +317,8 @@ int main(void) {
assert(m);
assert(sd_rtnl_message_append_u32(m, IFLA_MTU, mtu) >= 0);
+ assert(sd_rtnl_message_read(m, &type, (void **) &mtu_reply) == -EPERM);
+ assert(sd_rtnl_call(rtnl, m, -1, &r) == 1);
assert(sd_rtnl_message_read(m, &type, (void **) &mtu_reply) == 1);
assert(type == IFLA_MTU);
@@ -310,7 +326,6 @@ int main(void) {
assert(sd_rtnl_message_read(m, &type, &data) == 0);
- assert(sd_rtnl_call(rtnl, m, -1, &r) == 1);
while (sd_rtnl_message_read(r, &type, &data) > 0) {
switch (type) {
// case IFLA_MTU:
diff --git a/src/systemd/sd-rtnl.h b/src/systemd/sd-rtnl.h
index 5539e23153..c545333921 100644
--- a/src/systemd/sd-rtnl.h
+++ b/src/systemd/sd-rtnl.h
@@ -105,6 +105,7 @@ int sd_rtnl_message_open_container(sd_rtnl_message *m, unsigned short type);
int sd_rtnl_message_close_container(sd_rtnl_message *m);
int sd_rtnl_message_read(sd_rtnl_message *m, unsigned short *type, void **data);
+int sd_rtnl_message_exit_container(sd_rtnl_message *m);
int sd_rtnl_message_rewind(sd_rtnl_message *m);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-04 19:45:25 +0000