detect: minor cleanup for rule group get function

src/detect.c

@@ -202,8 +202,6 @@ const SigGroupHead *SigMatchSignaturesGetSgh(const DetectEngineCtx *de_ctx,
         const Packet *p)
 {
     SCEnter();
-
-    int f;
     SigGroupHead *sgh = NULL;
 
     /* if the packet proto is 0 (not set), we're inspecting it against
@@ -218,33 +216,30 @@ const SigGroupHead *SigMatchSignaturesGetSgh(const DetectEngineCtx *de_ctx,
     }
 
     /* select the flow_gh */
-    if (p->flowflags & FLOW_PKT_TOCLIENT)
-        f = 0;
-    else
-        f = 1;
+    const int dir = (p->flowflags & FLOW_PKT_TOCLIENT) == 0;
 
     int proto = IP_GET_IPPROTO(p);
     if (proto == IPPROTO_TCP) {
-        DetectPort *list = de_ctx->flow_gh[f].tcp;
-        SCLogDebug("tcp toserver %p, tcp toclient %p: going to use %p",
-                de_ctx->flow_gh[1].tcp, de_ctx->flow_gh[0].tcp, de_ctx->flow_gh[f].tcp);
-        uint16_t port = f ? p->dp : p->sp;
+        DetectPort *list = de_ctx->flow_gh[dir].tcp;
+        SCLogDebug("tcp toserver %p, tcp toclient %p: going to use %p", de_ctx->flow_gh[1].tcp,
+                de_ctx->flow_gh[0].tcp, de_ctx->flow_gh[dir].tcp);
+        const uint16_t port = dir ? p->dp : p->sp;
         SCLogDebug("tcp port %u -> %u:%u", port, p->sp, p->dp);
         DetectPort *sghport = DetectPortLookupGroup(list, port);
         if (sghport != NULL)
             sgh = sghport->sh;
-        SCLogDebug("TCP list %p, port %u, direction %s, sghport %p, sgh %p",
-                list, port, f ? "toserver" : "toclient", sghport, sgh);
+        SCLogDebug("TCP list %p, port %u, direction %s, sghport %p, sgh %p", list, port,
+                dir ? "toserver" : "toclient", sghport, sgh);
     } else if (proto == IPPROTO_UDP) {
-        DetectPort *list = de_ctx->flow_gh[f].udp;
-        uint16_t port = f ? p->dp : p->sp;
+        DetectPort *list = de_ctx->flow_gh[dir].udp;
+        uint16_t port = dir ? p->dp : p->sp;
         DetectPort *sghport = DetectPortLookupGroup(list, port);
         if (sghport != NULL)
             sgh = sghport->sh;
-        SCLogDebug("UDP list %p, port %u, direction %s, sghport %p, sgh %p",
-                list, port, f ? "toserver" : "toclient", sghport, sgh);
+        SCLogDebug("UDP list %p, port %u, direction %s, sghport %p, sgh %p", list, port,
+                dir ? "toserver" : "toclient", sghport, sgh);
     } else {
-        sgh = de_ctx->flow_gh[f].sgh[proto];
+        sgh = de_ctx->flow_gh[dir].sgh[proto];
     }
 
     SCReturnPtr(sgh, "SigGroupHead");