Hello ZeroMQ

安裝

git clone --depth=1 https://github.com/imatix/zguide.git
./configure
make
make install

編譯依賴
libsodium-1.0.0 (zeromq-4.1.2)

Github Issues:
zmq-4.1.2 make failed as libsodium-1.0.8 sodium_init #1854

cc1plus: warnings being treated as errors
src/curve_client.cpp: In constructor 

'zmq::curve_client_t::curve_client_t(const zmq::options_t&)':
src/curve_client.cpp:61: warning: ignoring return value of
 'int sodium_init()', 
declared with attribute warn_unused_result

C Project 添加庫

gcc -L/usr/local/lib -o "veto_mq_server"  ./src/veto_mq_server.o  -lzmq

可能的異常：庫路徑、名稱錯誤

Undefined symbols for architecture x86_64:
"_zmq_bind", referenced from:
_main in veto_mq_server.o
"_zmq_ctx_new", referenced from:
_main in veto_mq_server.o
"_zmq_recv", referenced from:
_main in veto_mq_server.o
"_zmq_send", referenced from:
_main in veto_mq_server.o
"_zmq_socket", referenced from:
_main in veto_mq_server.o
** ld: symbol(s) not found for architecture x86_64 **
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Client-Server Model

server.c

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <assert.h>
#include <zmq.h>
#include <zmq_utils.h>

#include "veto_mq_utils.h"

int main (void)
{
 //
 print_zmq_version();
    //  Socket to talk to clients
    void *context = zmq_ctx_new ();
    void *responder = zmq_socket (context, ZMQ_REP);
    int rc = zmq_bind (responder, "tcp://*:5555");
    assert (rc == 0);

    while (1) {
        char buffer [10];
        zmq_recv (responder, buffer, 10, 0);

        printf ("Received Hello \n");
        sleep (1);          //  Do some 'work'
        zmq_send (responder, "World", 5, 0);
    }
    return 0;
}

** client.c **

#include <string.h>
#include <stdio.h>
#include <unistd.h>

#include <zmq.h>
#include <zmq_utils.h>

int main(void) {

   printf ("Connecting to hello world server...\n");

     void *context = zmq_ctx_new ();
     void *requester = zmq_socket (context, ZMQ_REQ);

     zmq_connect (requester, "tcp://localhost:5555");

     int request_nbr;
     for (request_nbr = 0; request_nbr != 10; request_nbr++) {
         char buffer [10];
         printf ("Sending Hello %d...\n", request_nbr);
         zmq_send (requester, "Hello", 5, 0);
         zmq_recv (requester, buffer, 10, 0);
         printf ("Received World %d\n", request_nbr);
     }

     zmq_close (requester);
     zmq_ctx_destroy (context);

  return 0;
}

Makefile

SHELL   = /bin/sh

prefix  = /usr/local
exec_prefix=${prefix}
srcdir  = .
sbindir = ${exec_prefix}/sbin
libdir  = ${exec_prefix}/lib
sysconfdir = ${prefix}/etc
SETUPDIR = /home/nms
TARGETDIR = $(SETUPDIR)/bin
SRCDIR = .
CC      = gcc
CFLAGS  = -O2 -Wall
CPPFLAGS= -g 
DEFS    = 
LDFLAGS = 
LIBS    = -lzmq  -L/usr/local/lib
INCLUDES= -I/usr/local/include 

CURR_DIR = $(shell pwd)

CC_TMP = lib

OBJS    =  $(CC_TMP)/veto_mq_server.o  $(CC_TMP)/veto_mq_utils.o
TARGET  =  veto_mq_server

.c.o:
 $(CC) -I. $(CPPFLAGS) $(DEFS) $(CFLAGS) -c $<

all: $(TARGET)

$(TARGET): $(OBJS)
 $(CC) $(CPPFLAGS) $(OBJS) $(LIBS) $(LDFLAGS) -o $@
 -cp $(SRCDIR)/$(TARGET)  $(TARGETDIR)/$(TARGET) 
 -chmod ugo+s $(TARGETDIR)/$(TARGET) 
 -chmod ugo+s $(SRCDIR)/$(TARGET) 

clean:
 -rm -f *.o *~  *.core core $(TARGET) 
 -rm -f $(TARGETDIR)/$(TARGET)

veto_mq_server.o: veto_mq_server.c
 $(CC) -g -c -o $(CC_TMP)/veto_mq_server.o veto_mq_server.c $(CPPFLAGS) $(INCLUDES)

veto_mq_utils.o: veto_mq_utils.c
 $(CC) -g -c -o $(CC_TMP)/veto_mq_utils.o veto_mq_utils.c $(INCLUDES)
 

Running

bash-3.2# ./veto_mq_server

bash-3.2# ps -ef | grep mq | grep -v 'grep'
    0  3616     1   0 10:00AM ttys000    0:00.01 ./veto_mq_server

bash-3.2# ./veto_mq_client

Connecting to hello world server...
Sending Hello 0...
Received World 0
Sending Hello 1...
Received World 1
Sending Hello 2...
Received World 2
Sending Hello 3...
Received World 3
Sending Hello 4...
Received World 4
Sending Hello 5...
Received World 5
Sending Hello 6...
Received World 6
Sending Hello 7...
Received World 7
Sending Hello 8...
Received World 8
Sending Hello 9...
Received World 9