Change client/server to master/slave to avoid confusions

src/motor-control/build/Makefile

-SERVER_PROG = server
-CLIENT_PROG = client
+SLAVE_PROG = slave
+MASTER_PROG = master
 SRCDIR = ../src
 
-SERVER_SRCS  = server.c
-SERVER_SRCS  += recv_packet.c
-SERVER_SRCS  += send_packet.c
-SERVER_SRCS  += common.c
-SERVER_SRCS  += gpio.c
+SLAVE_SRCS  = slave.c
+SLAVE_SRCS  += recv_packet.c
+SLAVE_SRCS  += send_packet.c
+SLAVE_SRCS  += common.c
+SLAVE_SRCS  += gpio.c
 
-CLIENT_SRCS  = client.c
-CLIENT_SRCS += recv_packet.c
-CLIENT_SRCS += send_packet.c
-CLIENT_SRCS += common.c
+MASTER_SRCS  = master.c
+MASTER_SRCS += recv_packet.c
+MASTER_SRCS += send_packet.c
+MASTER_SRCS += common.c
 
-SERVER_OBJS = $(SERVER_SRCS:%.c=%.o)
-CLIENT_OBJS = $(CLIENT_SRCS:%.c=%.o)
+SLAVE_OBJS = $(SLAVE_SRCS:%.c=%.o)
+MASTER_OBJS = $(MASTER_SRCS:%.c=%.o)
 
 ifeq ($(DEBUG),)
 CFLAGS = -O2
@@ -41,36 +41,36 @@ endif
 vpath %.c $(SRCDIR)
 
 all: links
-links: bin/$(SERVER_PROG) bin/$(CLIENT_PROG)
-bin/$(SERVER_PROG): $(SERVER_PROG)
+links: bin/$(SLAVE_PROG) bin/$(MASTER_PROG)
+bin/$(SLAVE_PROG): $(SLAVE_PROG)
 	mkdir -p bin
-	ln -fs $(realpath $(SERVER_PROG)) $@
-bin/$(CLIENT_PROG): $(CLIENT_PROG)
+	ln -fs $(realpath $(SLAVE_PROG)) $@
+bin/$(MASTER_PROG): $(MASTER_PROG)
 	mkdir -p bin
-	ln -fs $(realpath $(CLIENT_PROG)) $@
+	ln -fs $(realpath $(MASTER_PROG)) $@
 
 xdp_kern.o: xdp_kern.c
 	clang $(IFLAGS) -isystem /usr/include/arm-linux-gnueabihf -S -target bpf -D __BPF_TRACING__ -Wall -O2 -emit-llvm -c -g -o xdp_kern.ll $^
 	llc -march=bpf -filetype=obj -o $@ xdp_kern.ll
 
 ifneq ($(WITH_GIT_XDP),)
-$(SERVER_PROG): $(SERVER_OBJS) xdp_kern.o
-	$(CC) $(LDFLAGS) $(LDIRS) $(SERVER_OBJS) $(LLIBS) -o $@
+$(SLAVE_PROG): $(SLAVE_OBJS) xdp_kern.o
+	$(CC) $(LDFLAGS) $(LDIRS) $(SLAVE_OBJS) $(LLIBS) -o $@
 else
-$(SERVER_PROG): $(SERVER_OBJS)
+$(SLAVE_PROG): $(SLAVE_OBJS)
 	$(CC) $(LDFLAGS) $(LDIRS) $^ $(LLIBS) -o $@
 endif
 
-$(CLIENT_PROG): $(CLIENT_OBJS)
+$(MASTER_PROG): $(MASTER_OBJS)
 	$(CC) $(LDFLAGS) $(LDIRS) $^ $(LLIBS) -o $@
 
 
--include $(subst .c,.d,$(SERVER_SRCS))
--include $(subst .c,.d,$(CLIENT_SRCS))
+-include $(subst .c,.d,$(SLAVE_SRCS))
+-include $(subst .c,.d,$(MASTER_SRCS))
 
 clean:
 	$(RM) -rf bin
-	$(RM) $(SERVER_OBJS) $(SERVER_PROG) $(subst .c,.d,$(SERVER_SRCS))
-	$(RM) $(CLIENT_OBJS) $(CLIENT_PROG) $(subst .c,.d,$(CLIENT_SRCS))
+	$(RM) $(SLAVE_OBJS) $(SLAVE_PROG) $(subst .c,.d,$(SLAVE_SRCS))
+	$(RM) $(MASTER_OBJS) $(MASTER_PROG) $(subst .c,.d,$(MASTER_SRCS))
 
 .PHONY: clean all links

src/motor-control/src/client.c → src/motor-control/src/master.c

 /*
- * Real time packet sending client
+ * Motor control master
  *
  * Large portions taken from cyclictest
  *

src/motor-control/src/server.c → src/motor-control/src/slave.c

 /*
- * Real time packet receiving server
+ * Motor control slave
  *
  * Large portions taken from cyclictest
  *