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authorErlang/OTP <[email protected]>2019-05-06 17:09:05 +0200
committerErlang/OTP <[email protected]>2019-05-06 17:09:05 +0200
commiteea3a5a6852235429a2317c706dce946295f3943 (patch)
tree80ee1e86c1979cfa20ef940fcdbaabb10263bd1e
parent68a90eb777b5c1e48c0760337fbf2b0b8a9aa6aa (diff)
parente05ce24868c8391103faea7de3f230fa8f2ce0a2 (diff)
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Merge branch 'rickard/ei-nodename/OTP-15781' into maint-21
* rickard/ei-nodename/OTP-15781: Increase max number of node name characters to 256
-rw-r--r--lib/erl_interface/include/ei.h6
-rw-r--r--lib/erl_interface/src/connect/ei_connect.c12
2 files changed, 13 insertions, 5 deletions
diff --git a/lib/erl_interface/include/ei.h b/lib/erl_interface/include/ei.h
index ca4960b252..947726208e 100644
--- a/lib/erl_interface/include/ei.h
+++ b/lib/erl_interface/include/ei.h
@@ -191,12 +191,12 @@ extern volatile int __erl_errno;
* library and when using the library we set a value that we use
*/
-#define EI_MAXHOSTNAMELEN 64
-#define EI_MAXALIVELEN 63
#define EI_MAX_COOKIE_SIZE 512
#define MAXATOMLEN (255 + 1)
#define MAXATOMLEN_UTF8 (255*4 + 1)
-#define MAXNODELEN EI_MAXALIVELEN+1+EI_MAXHOSTNAMELEN
+#define EI_MAXHOSTNAMELEN (MAXATOMLEN - 2)
+#define EI_MAXALIVELEN (MAXATOMLEN - 2)
+#define MAXNODELEN MAXATOMLEN
typedef enum {
ERLANG_ASCII = 1,
diff --git a/lib/erl_interface/src/connect/ei_connect.c b/lib/erl_interface/src/connect/ei_connect.c
index 7a304e6d4f..95cb10a20c 100644
--- a/lib/erl_interface/src/connect/ei_connect.c
+++ b/lib/erl_interface/src/connect/ei_connect.c
@@ -791,14 +791,17 @@ int ei_connect_init_ussi(ei_cnode* ec, const char* this_node_name,
if (strcmp(hp->h_name, "localhost") == 0) {
/* We use a short node name */
if ((ct = strchr(thishostname, '.')) != NULL) *ct = '\0';
- sprintf(thisnodename, "%s@%s", this_node_name, thishostname);
} else {
/* We use a short node name */
if ((ct = strchr(hp->h_name, '.')) != NULL) *ct = '\0';
strcpy(thishostname, hp->h_name);
- sprintf(thisnodename, "%s@%s", this_node_name, hp->h_name);
}
}
+ if (strlen(this_node_name) + 1 + strlen(thishostname) > MAXNODELEN) {
+ EI_TRACE_ERR0("ei_connect_init_ussi","this node name is too long");
+ return ERL_ERROR;
+ }
+ sprintf(thisnodename, "%s@%s", this_node_name, thishostname);
res = ei_connect_xinit_ussi(ec, thishostname, thisalivename, thisnodename,
(struct in_addr *)*hp->h_addr_list, cookie, creation,
cbs, cbs_sz, setup_context);
@@ -889,6 +892,11 @@ int ei_connect_tmo(ei_cnode* ec, char *nodename, unsigned ms)
int ei_h_errno;
#endif /* !win32 */
int res;
+
+ if (strlen(nodename) > MAXNODELEN) {
+ EI_TRACE_ERR0("ei_connect","Too long nodename");
+ return ERL_ERROR;
+ }
/* extract the host and alive parts from nodename */
if (!(hostname = strchr(nodename,'@'))) {