sd-netlink: avoid casting size_t into int

[elogind.git] / src / libsystemd / sd-netlink / netlink-message.c

diff --git a/src/libsystemd/sd-netlink/netlink-message.c b/src/libsystemd/sd-netlink/netlink-message.c
index 887327c9ae20f90e65f4881556e833f12734be98..a41d7f96704ea18b87026fefb6376d5b6bcd5b25 100644 (file)
--- a/src/libsystemd/sd-netlink/netlink-message.c
+++ b/src/libsystemd/sd-netlink/netlink-message.c
@@ -76,7 +76,7 @@ int message_new(sd_netlink *rtnl, sd_netlink_message **ret, uint16_t type) {
         if (r < 0)
                 return r;
 
-        size = NLMSG_SPACE(nl_type->size);
+        size = NLMSG_SPACE(type_get_size(nl_type));
 
         assert(size >= sizeof(struct nlmsghdr));
         m->hdr = malloc0(size);
@@ -85,7 +85,7 @@ int message_new(sd_netlink *rtnl, sd_netlink_message **ret, uint16_t type) {
 
         m->hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
 
-        if (nl_type->type == NETLINK_TYPE_NESTED)
+        if (type_get_type(nl_type) == NETLINK_TYPE_NESTED)
                 type_get_type_system(nl_type, &m->container_type_system[0]);
         m->hdr->nlmsg_len = size;
         m->hdr->nlmsg_type = type;
@@ -215,18 +215,22 @@ static int add_rtattr(sd_netlink_message *m, unsigned short type, const void *da
         return offset;
 }
 
-static int message_attribute_has_type(sd_netlink_message *m, uint16_t attribute_type, uint16_t data_type) {
+static int message_attribute_has_type(sd_netlink_message *m, size_t *out_size, uint16_t attribute_type, uint16_t data_type) {
         const NLType *type;
         int r;
 
+        assert(m);
+
         r = type_system_get_type(m->container_type_system[m->n_containers], &type, attribute_type);
         if (r < 0)
                 return r;
 
-        if (type->type != data_type)
+        if (type_get_type(type) != data_type)
                 return -EINVAL;
 
-        return type->size;
+        if (out_size)
+                *out_size = type_get_size(type);
+        return 0;
 }
 
 int sd_netlink_message_append_string(sd_netlink_message *m, unsigned short type, const char *data) {
@@ -237,11 +241,9 @@ int sd_netlink_message_append_string(sd_netlink_message *m, unsigned short type,
         assert_return(!m->sealed, -EPERM);
         assert_return(data, -EINVAL);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_STRING);
+        r = message_attribute_has_type(m, &size, type, NETLINK_TYPE_STRING);
         if (r < 0)
                 return r;
-        else
-                size = (size_t)r;
 
         if (size) {
                 length = strnlen(data, size+1);
@@ -263,7 +265,7 @@ int sd_netlink_message_append_u8(sd_netlink_message *m, unsigned short type, uin
         assert_return(m, -EINVAL);
         assert_return(!m->sealed, -EPERM);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_U8);
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U8);
         if (r < 0)
                 return r;
 
@@ -281,7 +283,7 @@ int sd_netlink_message_append_u16(sd_netlink_message *m, unsigned short type, ui
         assert_return(m, -EINVAL);
         assert_return(!m->sealed, -EPERM);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_U16);
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U16);
         if (r < 0)
                 return r;
 
@@ -298,7 +300,7 @@ int sd_netlink_message_append_u32(sd_netlink_message *m, unsigned short type, ui
         assert_return(m, -EINVAL);
         assert_return(!m->sealed, -EPERM);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_U32);
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U32);
         if (r < 0)
                 return r;
 
@@ -316,7 +318,7 @@ int sd_netlink_message_append_in_addr(sd_netlink_message *m, unsigned short type
         assert_return(!m->sealed, -EPERM);
         assert_return(data, -EINVAL);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_IN_ADDR);
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_IN_ADDR);
         if (r < 0)
                 return r;
 
@@ -334,7 +336,7 @@ int sd_netlink_message_append_in6_addr(sd_netlink_message *m, unsigned short typ
         assert_return(!m->sealed, -EPERM);
         assert_return(data, -EINVAL);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_IN_ADDR);
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_IN_ADDR);
         if (r < 0)
                 return r;
 
@@ -352,7 +354,7 @@ int sd_netlink_message_append_ether_addr(sd_netlink_message *m, unsigned short t
         assert_return(!m->sealed, -EPERM);
         assert_return(data, -EINVAL);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_ETHER_ADDR);
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_ETHER_ADDR);
         if (r < 0)
                 return r;
 
@@ -370,7 +372,7 @@ int sd_netlink_message_append_cache_info(sd_netlink_message *m, unsigned short t
         assert_return(!m->sealed, -EPERM);
         assert_return(info, -EINVAL);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_CACHE_INFO);
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_CACHE_INFO);
         if (r < 0)
                 return r;
 
@@ -389,15 +391,14 @@ int sd_netlink_message_open_container(sd_netlink_message *m, unsigned short type
         assert_return(!m->sealed, -EPERM);
         assert_return(m->n_containers < RTNL_CONTAINER_DEPTH, -ERANGE);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_NESTED);
+        r = message_attribute_has_type(m, &size, type, NETLINK_TYPE_NESTED);
         if (r < 0) {
                 const NLTypeSystemUnion *type_system_union;
                 int family;
 
-                r = message_attribute_has_type(m, type, NETLINK_TYPE_UNION);
+                r = message_attribute_has_type(m, &size, type, NETLINK_TYPE_UNION);
                 if (r < 0)
                         return r;
-                size = (size_t) r;
 
                 r = sd_rtnl_message_get_family(m, &family);
                 if (r < 0)
@@ -413,8 +414,6 @@ int sd_netlink_message_open_container(sd_netlink_message *m, unsigned short type
                 if (r < 0)
                         return r;
         } else {
-                size = (size_t)r;
-
                 r = type_system_get_type_system(m->container_type_system[m->n_containers],
                                                 &m->container_type_system[m->n_containers + 1],
                                                 type);
@@ -500,7 +499,7 @@ int sd_netlink_message_read_string(sd_netlink_message *m, unsigned short type, c
 
         assert_return(m, -EINVAL);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_STRING);
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_STRING);
         if (r < 0)
                 return r;
 
@@ -522,7 +521,7 @@ int sd_netlink_message_read_u8(sd_netlink_message *m, unsigned short type, uint8
 
         assert_return(m, -EINVAL);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_U8);
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U8);
         if (r < 0)
                 return r;
 
@@ -544,7 +543,7 @@ int sd_netlink_message_read_u16(sd_netlink_message *m, unsigned short type, uint
 
         assert_return(m, -EINVAL);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_U16);
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U16);
         if (r < 0)
                 return r;
 
@@ -566,7 +565,7 @@ int sd_netlink_message_read_u32(sd_netlink_message *m, unsigned short type, uint
 
         assert_return(m, -EINVAL);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_U32);
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U32);
         if (r < 0)
                 return r;
 
@@ -588,7 +587,7 @@ int sd_netlink_message_read_ether_addr(sd_netlink_message *m, unsigned short typ
 
         assert_return(m, -EINVAL);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_ETHER_ADDR);
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_ETHER_ADDR);
         if (r < 0)
                 return r;
 
@@ -610,7 +609,7 @@ int sd_netlink_message_read_cache_info(sd_netlink_message *m, unsigned short typ
 
         assert_return(m, -EINVAL);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_CACHE_INFO);
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_CACHE_INFO);
         if (r < 0)
                 return r;
 
@@ -632,7 +631,7 @@ int sd_netlink_message_read_in_addr(sd_netlink_message *m, unsigned short type,
 
         assert_return(m, -EINVAL);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_IN_ADDR);
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_IN_ADDR);
         if (r < 0)
                 return r;
 
@@ -654,7 +653,7 @@ int sd_netlink_message_read_in6_addr(sd_netlink_message *m, unsigned short type,
 
         assert_return(m, -EINVAL);
 
-        r = message_attribute_has_type(m, type, NETLINK_TYPE_IN_ADDR);
+        r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_IN_ADDR);
         if (r < 0)
                 return r;
 
@@ -670,10 +669,11 @@ int sd_netlink_message_read_in6_addr(sd_netlink_message *m, unsigned short type,
         return 0;
 }
 
-int sd_netlink_message_enter_container(sd_netlink_message *m, unsigned short type) {
+int sd_netlink_message_enter_container(sd_netlink_message *m, unsigned short type_id) {
         const NLType *nl_type;
         const NLTypeSystem *type_system;
         void *container;
+        uint16_t type;
         size_t size;
         int r;
 
@@ -682,22 +682,24 @@ int sd_netlink_message_enter_container(sd_netlink_message *m, unsigned short typ
 
         r = type_system_get_type(m->container_type_system[m->n_containers],
                                  &nl_type,
-                                 type);
+                                 type_id);
         if (r < 0)
                 return r;
 
-        if (nl_type->type == NETLINK_TYPE_NESTED) {
+        type = type_get_type(nl_type);
+
+        if (type == NETLINK_TYPE_NESTED) {
                 r = type_system_get_type_system(m->container_type_system[m->n_containers],
                                                 &type_system,
-                                                type);
+                                                type_id);
                 if (r < 0)
                         return r;
-        } else if (nl_type->type == NETLINK_TYPE_UNION) {
+        } else if (type == NETLINK_TYPE_UNION) {
                 const NLTypeSystemUnion *type_system_union;
 
                 r = type_system_get_type_system_union(m->container_type_system[m->n_containers],
                                                       &type_system_union,
-                                                      type);
+                                                      type_id);
                 if (r < 0)
                         return r;
 
@@ -740,7 +742,7 @@ int sd_netlink_message_enter_container(sd_netlink_message *m, unsigned short typ
         } else
                 return -EINVAL;
 
-        r = rtnl_message_read_internal(m, type, &container);
+        r = rtnl_message_read_internal(m, type_id, &container);
         if (r < 0)
                 return r;
         else
@@ -751,7 +753,7 @@ int sd_netlink_message_enter_container(sd_netlink_message *m, unsigned short typ
         r = rtnl_message_parse(m,
                                &m->rta_offset_tb[m->n_containers],
                                &m->rta_tb_size[m->n_containers],
-                               type_system->max,
+                               type_system_get_max(type_system),
                                container,
                                size);
         if (r < 0) {
@@ -842,7 +844,9 @@ int rtnl_message_parse(sd_netlink_message *m,
 }
 
 int sd_netlink_message_rewind(sd_netlink_message *m) {
-        const NLType *type;
+        const NLType *nl_type;
+        uint16_t type;
+        size_t size;
         unsigned i;
         int r;
 
@@ -868,24 +872,26 @@ int sd_netlink_message_rewind(sd_netlink_message *m) {
 
         assert(m->hdr);
 
-        r = type_system_get_type(NULL, &type, m->hdr->nlmsg_type);
+        r = type_system_get_type(NULL, &nl_type, m->hdr->nlmsg_type);
         if (r < 0)
                 return r;
 
-        if (type->type == NETLINK_TYPE_NESTED) {
+        type = type_get_type(nl_type);
+        size = type_get_size(nl_type);
+
+        if (type == NETLINK_TYPE_NESTED) {
                 const NLTypeSystem *type_system;
 
-                type_get_type_system(type, &type_system);
+                type_get_type_system(nl_type, &type_system);
 
                 m->container_type_system[0] = type_system;
 
                 r = rtnl_message_parse(m,
                                        &m->rta_offset_tb[m->n_containers],
                                        &m->rta_tb_size[m->n_containers],
-                                       type_system->max,
-                                       (struct rtattr*)((uint8_t*)NLMSG_DATA(m->hdr) +
-                                                        NLMSG_ALIGN(type->size)),
-                                       NLMSG_PAYLOAD(m->hdr, type->size));
+                                       type_system_get_max(type_system),
+                                       (struct rtattr*)((uint8_t*)NLMSG_DATA(m->hdr) + NLMSG_ALIGN(size)),
+                                       NLMSG_PAYLOAD(m->hdr, size));
                 if (r < 0)
                         return r;
         }