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added reference counters for nodes

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git-svn-id: https://zerberus.eonerc.rwth-aachen.de:8443/svn/s2ss/trunk@244 8ec27952-4edc-4aab-86aa-e87bb2611832
This commit is contained in:
Steffen Vogel 2014-09-11 14:40:48 +00:00
parent 5b1038fc9d
commit 8bb14500fc
3 changed files with 21 additions and 12 deletions
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8
server/include/node.h
View file

@ -35,6 +35,10 @@ struct node
{
/** The socket descriptor */
int sd;
/** How many paths are sending / receiving from this node? */
int refcnt;
/** Socket mark for netem, routing and filtering */
int mark;
/** A short identifier of the node, only used for configuration and logging */
const char *name;
@ -46,13 +50,9 @@ struct node
/** The egress interface */
struct interface *interface;
/** Network emulator settings */
struct netem *netem;
/** Socket mark for netem, routing and filtering */
int mark;
/** A pointer to the libconfig object which instantiated this node */
config_setting_t *cfg;

18
server/src/cfg.c
View file

@ -119,19 +119,25 @@ int config_parse_path(config_setting_t *cfg,
p->cfg = cfg;
if (enabled) {
p->in->refcnt++;
p->out->refcnt++;
list_add(*paths, p);
if (reverse) {
struct path *prev = (struct path *) malloc(sizeof(struct path));
if (!prev)
struct path *rev = (struct path *) malloc(sizeof(struct path));
if (!rev)
error("Failed to allocate memory for path");
else
memcpy(prev, path, sizeof(struct path));
memcpy(rev, p, sizeof(struct path));
prev->in = p->out; /* Swap in/out */
prev->out = p->in;
rev->in = p->out; /* Swap in/out */
rev->out = p->in;
list_add(*paths, prev);
rev->in->refcnt++;
rev->out->refcnt++;
list_add(*paths, rev);
}
}
else {

7
server/src/server.c
View file

@ -36,6 +36,8 @@ static void start()
{
/* Connect and bind nodes to their sockets, set socket options */
for (struct node *n = nodes; n; n = n->next) {
if (!n->refcnt) continue;
/* Determine outgoing interface */
int index = if_getegress(&n->remote);
if (index < 0)
@ -97,8 +99,9 @@ static void start()
/* Setup network emulation */
for (struct interface *i = interfaces; i; i = i->next) {
if (i->refcnt)
tc_prio(i, TC_HDL(4000, 0), i->refcnt);
if (!i->refcnt) continue;
tc_prio(i, TC_HDL(4000, 0), i->refcnt);
}
for (struct node *n = nodes; n; n = n->next) {