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authorDimitri Staessens <dimitri.staessens@ugent.be>2018-05-28 11:51:35 +0200
committerSander Vrijders <sander.vrijders@ugent.be>2018-05-28 12:53:36 +0200
commit1bee8b3d288bc2c26432b8e675b18e482a98255e (patch)
tree0535f99d4b4cc640b1945f779cf50acc8e90a400 /src/ipcpd
parentd537083d00facc5f0b53b5a7ffaa417786bdfc1f (diff)
downloadouroboros-1bee8b3d288bc2c26432b8e675b18e482a98255e.tar.gz
ouroboros-1bee8b3d288bc2c26432b8e675b18e482a98255e.zip
build: Check for variable length arrays
The clang and gcc compilers don't complain about variable length arrays using the -c89 flag unless the flag -Wvla or -Wpedantic is set. This also fixes a memleak and two false positive uninitialized variable warnings reported by the clang static analyzer in graph.c. Signed-off-by: Dimitri Staessens <dimitri.staessens@ugent.be> Signed-off-by: Sander Vrijders <sander.vrijders@ugent.be>
Diffstat (limited to 'src/ipcpd')
-rw-r--r--src/ipcpd/normal/pol/graph.c45
-rw-r--r--src/ipcpd/udp/main.c36
2 files changed, 57 insertions, 24 deletions
diff --git a/src/ipcpd/normal/pol/graph.c b/src/ipcpd/normal/pol/graph.c
index 007e1047..5aed1e9a 100644
--- a/src/ipcpd/normal/pol/graph.c
+++ b/src/ipcpd/normal/pol/graph.c
@@ -359,12 +359,7 @@ static int get_min_vertex(struct graph * graph,
*v = NULL;
list_for_each(p, &graph->vertices) {
- if (used[i]) {
- i++;
- continue;
- }
-
- if (dist[i] < min) {
+ if (!used[i] && dist[i] < min) {
min = dist[i];
index = i;
*v = list_entry(p, struct vertex, next);
@@ -384,7 +379,7 @@ static int dijkstra(struct graph * graph,
struct vertex *** nhops,
int ** dist)
{
- bool used[graph->nr_vertices];
+ bool * used;
struct list_head * p = NULL;
int i = 0;
struct vertex * v = NULL;
@@ -393,25 +388,24 @@ static int dijkstra(struct graph * graph,
*nhops = malloc(sizeof(**nhops) * graph->nr_vertices);
if (*nhops == NULL)
- return -1;
+ goto fail_pnhops;
*dist = malloc(sizeof(**dist) * graph->nr_vertices);
- if (*dist == NULL) {
- free(*nhops);
- return -1;
- }
+ if (*dist == NULL)
+ goto fail_pdist;
+
+ used = malloc(sizeof(*used) * graph->nr_vertices);
+ if (used == NULL)
+ goto fail_used;
/* Init the data structures */
+ memset(used, 0, sizeof(*used) * graph->nr_vertices);
+ memset(*nhops, 0, sizeof(**nhops) * graph->nr_vertices);
+ memset(*dist, 0, sizeof(**dist) * graph->nr_vertices);
+
list_for_each(p, &graph->vertices) {
v = list_entry(p, struct vertex, next);
- if (v->addr == src)
- (*dist)[i] = 0;
- else
- (*dist)[i] = INT_MAX;
-
- (*nhops)[i] = NULL;
- used[i] = false;
- i++;
+ (*dist)[i++] = (v->addr == src) ? 0 : INT_MAX;
}
/* Perform actual Dijkstra */
@@ -441,7 +435,17 @@ static int dijkstra(struct graph * graph,
i = get_min_vertex(graph, *dist, used, &v);
}
+ free(used);
+
return 0;
+
+ fail_used:
+ free(*dist);
+ fail_pdist:
+ free(*nhops);
+ fail_pnhops:
+ return -1;
+
}
static void free_routing_table(struct list_head * table)
@@ -536,6 +540,7 @@ static int graph_routing_table_simple(struct graph * graph,
fail_t:
free_routing_table(table);
free(nhops);
+ free(*dist);
fail_vertices:
*dist = NULL;
return -1;
diff --git a/src/ipcpd/udp/main.c b/src/ipcpd/udp/main.c
index 26f993ce..8341aac1 100644
--- a/src/ipcpd/udp/main.c
+++ b/src/ipcpd/udp/main.c
@@ -788,7 +788,11 @@ static int ipcp_udp_reg(const uint8_t * hash)
uint32_t dns_addr;
uint32_t ip_addr;
#endif
- char hashstr[ipcp_dir_hash_strlen() + 1];
+ char * hashstr;
+
+ hashstr = malloc(ipcp_dir_hash_strlen() + 1);
+ if (hashstr == NULL)
+ return -1;
assert(hash);
@@ -797,6 +801,7 @@ static int ipcp_udp_reg(const uint8_t * hash)
if (shim_data_reg_add_entry(udp_data.shim_data, hash)) {
log_err("Failed to add " HASH_FMT " to local registry.",
HASH_VAL(hash));
+ free(hashstr);
return -1;
}
@@ -810,11 +815,13 @@ static int ipcp_udp_reg(const uint8_t * hash)
if (inet_ntop(AF_INET, &ip_addr,
ipstr, INET_ADDRSTRLEN) == NULL) {
+ free(hashstr);
return -1;
}
if (inet_ntop(AF_INET, &dns_addr,
dnsstr, INET_ADDRSTRLEN) == NULL) {
+ free(hashstr);
return -1;
}
@@ -823,12 +830,15 @@ static int ipcp_udp_reg(const uint8_t * hash)
if (ddns_send(cmd)) {
shim_data_reg_del_entry(udp_data.shim_data, hash);
+ free(hashstr);
return -1;
}
}
#endif
log_dbg("Registered " HASH_FMT ".", HASH_VAL(hash));
+ free(hashstr);
+
return 0;
}
@@ -840,10 +850,14 @@ static int ipcp_udp_unreg(const uint8_t * hash)
char cmd[100];
uint32_t dns_addr;
#endif
- char hashstr[ipcp_dir_hash_strlen() + 1];
+ char * hashstr;
assert(hash);
+ hashstr = malloc(ipcp_dir_hash_strlen() + 1);
+ if (hashstr == NULL)
+ return -1;
+
ipcp_hash_str(hashstr, hash);
#ifdef HAVE_DDNS
@@ -854,6 +868,7 @@ static int ipcp_udp_unreg(const uint8_t * hash)
if (dns_addr != 0) {
if (inet_ntop(AF_INET, &dns_addr, dnsstr, INET_ADDRSTRLEN)
== NULL) {
+ free(hashstr);
return -1;
}
sprintf(cmd, "server %s\nupdate delete %s A\nsend\nquit\n",
@@ -867,24 +882,32 @@ static int ipcp_udp_unreg(const uint8_t * hash)
log_dbg("Unregistered " HASH_FMT ".", HASH_VAL(hash));
+ free(hashstr);
+
return 0;
}
static int ipcp_udp_query(const uint8_t * hash)
{
uint32_t ip_addr = 0;
+ char * hashstr;
struct hostent * h;
#ifdef HAVE_DDNS
uint32_t dns_addr = 0;
#endif
- char hashstr[ipcp_dir_hash_strlen() + 1];
assert(hash);
+ hashstr = malloc(ipcp_dir_hash_strlen() + 1);
+ if (hashstr == NULL)
+ return -ENOMEM;
+
ipcp_hash_str(hashstr, hash);
- if (shim_data_dir_has(udp_data.shim_data, hash))
+ if (shim_data_dir_has(udp_data.shim_data, hash)) {
+ free(hashstr);
return 0;
+ }
#ifdef HAVE_DDNS
dns_addr = udp_data.dns_addr;
@@ -893,6 +916,7 @@ static int ipcp_udp_query(const uint8_t * hash)
ip_addr = ddns_resolve(hashstr, dns_addr);
if (ip_addr == 0) {
log_dbg("Could not resolve %s.", hashstr);
+ free(hashstr);
return -1;
}
} else {
@@ -900,6 +924,7 @@ static int ipcp_udp_query(const uint8_t * hash)
h = gethostbyname(hashstr);
if (h == NULL) {
log_dbg("Could not resolve %s.", hashstr);
+ free(hashstr);
return -1;
}
@@ -910,9 +935,12 @@ static int ipcp_udp_query(const uint8_t * hash)
if (shim_data_dir_add_entry(udp_data.shim_data, hash, ip_addr)) {
log_err("Failed to add directory entry.");
+ free(hashstr);
return -1;
}
+ free(hashstr);
+
return 0;
}