warning fixes (#551)

* fix Wstrict-prototypes warnings found by clang

also fix usage_long() call

Signed-off-by: Gabriel Ganne <gabriel.ganne@enea.com>

* fix Wunreachable-code-break warnings found by clang

Signed-off-by: Gabriel Ganne <gabriel.ganne@enea.com>

* fix Wshadow warnings found by clang

Signed-off-by: Gabriel Ganne <gabriel.ganne@enea.com>

* fix Wmissing-noreturn warning found by clang

Signed-off-by: Gabriel Ganne <gabriel.ganne@enea.com>

* ix memory leak found by clang

Signed-off-by: Gabriel Ganne <gabriel.ganne@enea.com>

* fix Wmisleading-indentation warnings raised by gcc-6

Signed-off-by: Gabriel Ganne <gabriel.ganne@enea.com>

* fix warning: Value stored to 'ptr' during its initialization is never read found by clang

Signed-off-by: Gabriel Ganne <gabriel.ganne@enea.com>

* fix warning: The left operand of '>' is a garbage value found by clang

Signed-off-by: Gabriel Ganne <gabriel.ganne@enea.com>

* fix memory leak in global cleanup

Signed-off-by: Gabriel Ganne <gabriel.ganne@enea.com>

src/cjson.c

@@ -48,9 +48,10 @@ const char *cJSON_GetErrorPtr(void) {return global_ep;}
 
 static int cJSON_strcasecmp(const char *s1,const char *s2)
 {
-	if (!s1) return (s1==s2)?0:1;if (!s2) return 1;
+    if (!s1) return (s1==s2)?0:1;
-	for(; tolower(*s1) == tolower(*s2); ++s1, ++s2)	if(*s1 == 0)	return 0;
+    if (!s2) return 1;
-	return tolower(*(const unsigned char *)s1) - tolower(*(const unsigned char *)s2);
+    for(; tolower(*s1) == tolower(*s2); ++s1, ++s2)	if(*s1 == 0)	return 0;
+    return tolower(*(const unsigned char *)s1) - tolower(*(const unsigned char *)s2);
 }
 
 static void *(*cJSON_malloc)(size_t sz) = malloc;
@@ -202,7 +203,7 @@ static unsigned parse_hex4(const char *str)
 static const unsigned char firstByteMark[7] = { 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };
 static const char *parse_string(cJSON *item,const char *str,const char **ep)
 {
-	const char *ptr=str+1,*end_ptr=str+1;char *ptr2;char *out;int len=0;unsigned uc,uc2;
+	const char *ptr,*end_ptr=str+1;char *ptr2;char *out;int len=0;unsigned uc,uc2;
 	if (*str!='\"') {*ep=str;return 0;}	/* not a string! */
 
 	while (*end_ptr!='\"' && *end_ptr && ++len)
@@ -620,7 +621,8 @@ static char *print_object(cJSON *item,int depth,int fmt,printbuffer *p)
 			len=(fmt?1:0)+(child->next?1:0);
 			ptr=ensure(p,len+1); if (!ptr) return 0;
 			if (child->next) *ptr++=',';
-			if (fmt) *ptr++='\n';*ptr=0;
+			if (fmt) *ptr++='\n';
+			*ptr=0;
 			p->offset+=len;
 			child=child->next;
 		}
@@ -670,7 +672,8 @@ static char *print_object(cJSON *item,int depth,int fmt,printbuffer *p)
 			*ptr++=':';if (fmt) *ptr++='\t';
 			strcpy(ptr,entries[i]);ptr+=strlen(entries[i]);
 			if (i!=numentries-1) *ptr++=',';
-			if (fmt) *ptr++='\n';*ptr=0;
+			if (fmt) *ptr++='\n';
+			*ptr=0;
 			cJSON_free(names[i]);cJSON_free(entries[i]);
 		}
 		
@@ -700,7 +703,7 @@ void	cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item)						{cJSON_AddIte
 void	cJSON_AddItemReferenceToObject(cJSON *object,const char *string,cJSON *item)	{cJSON_AddItemToObject(object,string,create_reference(item));}
 
 cJSON *cJSON_DetachItemFromArray(cJSON *array,int which)			{cJSON *c=array->child;while (c && which>0) c=c->next,which--;if (!c) return 0;
-	if (c->prev) c->prev->next=c->next;if (c->next) c->next->prev=c->prev;if (c==array->child) array->child=c->next;c->prev=c->next=0;return c;}
+	if (c->prev) {c->prev->next=c->next;}if (c->next) {c->next->prev=c->prev;}if (c==array->child) {array->child=c->next;} c->prev=c->next=0;return c;}
 void   cJSON_DeleteItemFromArray(cJSON *array,int which)			{cJSON_Delete(cJSON_DetachItemFromArray(array,which));}
 cJSON *cJSON_DetachItemFromObject(cJSON *object,const char *string) {int i=0;cJSON *c=object->child;while (c && cJSON_strcasecmp(c->string,string)) i++,c=c->next;if (c) return cJSON_DetachItemFromArray(object,i);return 0;}
 void   cJSON_DeleteItemFromObject(cJSON *object,const char *string) {cJSON_Delete(cJSON_DetachItemFromObject(object,string));}

src/iperf_api.c

@@ -354,9 +354,9 @@ iperf_set_test_burst(struct iperf_test *ipt, int burst)
 }
 
 void
-iperf_set_test_server_port(struct iperf_test *ipt, int server_port)
+iperf_set_test_server_port(struct iperf_test *ipt, int srv_port)
 {
-    ipt->server_port = server_port;
+    ipt->server_port = srv_port;
 }
 
 void
@@ -445,9 +445,9 @@ iperf_set_test_unit_format(struct iperf_test *ipt, char unit_format)
 }
 
 void
-iperf_set_test_bind_address(struct iperf_test *ipt, char *bind_address)
+iperf_set_test_bind_address(struct iperf_test *ipt, char *bnd_address)
 {
-    ipt->bind_address = strdup(bind_address);
+    ipt->bind_address = strdup(bnd_address);
 }
 
 void
@@ -759,11 +759,11 @@ iperf_parse_arguments(struct iperf_test *test, int argc, char **argv)
 #if defined(HAVE_SCTP)
                 set_protocol(test, Psctp);
                 client_flag = 1;
+                break;
 #else /* HAVE_SCTP */
                 i_errno = IEUNIMP;
                 return -1;
 #endif /* HAVE_SCTP */
-            break;
 
             case OPT_NUMSTREAMS:
 #if defined(linux) || defined(__FreeBSD__)
@@ -1622,6 +1622,7 @@ send_results(struct iperf_test *test)
 		}
 
 		cJSON_AddStringToObject(j, "server_output_text", output);
+        free(output);
 	    }
 	}
 
@@ -2489,7 +2490,7 @@ iperf_print_results(struct iperf_test *test)
     struct iperf_stream *sp = NULL;
     iperf_size_t bytes_sent, total_sent = 0;
     iperf_size_t bytes_received, total_received = 0;
-    double start_time, end_time, avg_jitter = 0.0, lost_percent;
+    double start_time, end_time = 0.0, avg_jitter = 0.0, lost_percent;
     double bandwidth;
 
     /* print final summary for all intervals */

src/iperf_api.h

@@ -169,7 +169,7 @@ void     iperf_reporter_callback(struct iperf_test * test);
  * returns NULL on failure
  *
  */
-struct iperf_test *iperf_new_test();
+struct iperf_test *iperf_new_test(void);
 
 int      iperf_defaults(struct iperf_test * testp);
 
@@ -222,8 +222,8 @@ int iperf_send(struct iperf_test *, fd_set *) /* __attribute__((hot)) */;
 int iperf_recv(struct iperf_test *, fd_set *);
 void iperf_catch_sigend(void (*handler)(int));
 void iperf_got_sigend(struct iperf_test *test) __attribute__ ((noreturn));
-void usage();
+void usage(void);
-void usage_long();
+void usage_long(FILE * f);
 void warning(char *);
 int iperf_exchange_results(struct iperf_test *);
 int iperf_init_test(struct iperf_test *);

src/iperf_error.c

@@ -82,7 +82,7 @@ iperf_errexit(struct iperf_test *test, const char *format, ...)
 int i_errno;
 
 char *
-iperf_strerror(int i_errno)
+iperf_strerror(int int_errno)
 {
     static char errstr[256];
     int len, perr, herr;
@@ -91,7 +91,7 @@ iperf_strerror(int i_errno)
     len = sizeof(errstr);
     memset(errstr, 0, len);
 
-    switch (i_errno) {
+    switch (int_errno) {
         case IENONE:
             snprintf(errstr, len, "no error");
             break;

src/iperf_server_api.c

@@ -434,6 +434,9 @@ cleanup_server(struct iperf_test *test)
 	tmr_cancel(test->omit_timer);
 	test->omit_timer = NULL;
     }
+    if (test->congestion_used != NULL) {
+        free(test->congestion_used);
+    }
 }
 
 

src/main.c

@@ -100,7 +100,7 @@ main(int argc, char **argv)
     if (iperf_parse_arguments(test, argc, argv) < 0) {
         iperf_err(test, "parameter error - %s", iperf_strerror(i_errno));
         fprintf(stderr, "\n");
-        usage_long();
+        usage_long(stdout);
         exit(1);
     }
 
@@ -115,7 +115,7 @@ main(int argc, char **argv)
 
 static jmp_buf sigend_jmp_buf;
 
-static void
+static void __attribute__ ((noreturn))
 sigend_handler(int sig)
 {
     longjmp(sigend_jmp_buf, 1);
@@ -153,7 +153,6 @@ run(struct iperf_test *test)
 		    iperf_err(test, "error - %s", iperf_strerror(i_errno));
 		    if (rc < -1) {
 		        iperf_errexit(test, "exiting");
-			break;
 		    }
                 }
                 iperf_reset_test(test);