学习笔记：openwrt listen & send 方式实现进程间通信源码

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学习笔记：openwrt listen & send 方式实现进程间通信源码

源码: git clone https://github.com/heenbo/ubus_listen_send_test.git

Makefile

CROSS_COMPILE = mips-openwrt-linux-CC = gccSOURCE = client1.c client2.cPROJECT_CLIENT1 = client1.oPROJECT_CLIENT2 = client2.oPROJECT = $(PROJECT_CLIENT1) $(PROJECT_CLIENT2)OBJECT_CLIENT1 = client1 OBJECT_CLIENT2 = client2OBJECT = $(OBJECT_CLIENT1) $(OBJECT_CLIENT2)LDFLAGS = -L/home/heenbo/work/openwrt-bb/staging_dir/target-mips_34kc_uClibc-0.9.33.2/usr/lib -lblobmsg_json -ljson-c -lubox -lubus -pthreadCFLAGS = -g -I/home/heenbo/work/openwrt-bb/build_dir/target-mips_34kc_uClibc-0.9.33.2/OpenWrt-SDK-ar71xx-for-linux-x86_64-gcc-4.8-linaro_uClibc-0.9.33.2/staging_dir/target-mips_34kc_uClibc-0.9.33.2/usr/include$(OBJECT) : $(PROJECT)    ${CROSS_COMPILE}${CC} $(PROJECT_CLIENT1) -o $(OBJECT_CLIENT1) ${LDFLAGS}    ${CROSS_COMPILE}${CC} $(PROJECT_CLIENT2) -o $(OBJECT_CLIENT2) ${LDFLAGS}$(PROJECT) : $(SOURCE)    ${CROSS_COMPILE}${CC} -c $^ ${CFLAGS}clean :     -rm -f $(PROJECT) $(OBJECT) *.o

client1.c

#include <stdio.h>#include <sys/time.h>#include <unistd.h>#include <libubox/ustream.h>#include <libubox/blobmsg_json.h>#include <pthread.h>#include "libubus.h"static struct ubus_context *ctx_listen = NULL;static struct ubus_context *ctx_send = NULL;static struct blob_buf blob_buf_send;static struct ubus_event_handler listener;void * pthread_ubus_send(void * arg);#define UBUS_LISTEN_OBJ_STR "client1"#define UBUS_SEND_OBJ_STR   "client2"static void receive_event(struct ubus_context *ctx, struct ubus_event_handler *ev,              const char *type, struct blob_attr *msg){    char *str;    str = blobmsg_format_json(msg, true);    printf("{ \"%s\": %s }\n", type, str);    free(str);}static void listen_main(void){    const char *event_listen = NULL;    int ret = 0;    memset(&listener, 0, sizeof(listener));    listener.cb = receive_event;    event_listen = UBUS_LISTEN_OBJ_STR;    ret = ubus_register_event_handler(ctx_listen, &listener, event_listen);    if (ret)    {        fprintf(stderr, "Error while registering for event '%s': %s\n",            event_listen, ubus_strerror(ret));        return;    }    uloop_init();    ubus_add_uloop(ctx_listen);    uloop_run();    uloop_done();}static int my_ubus_send(char *id, char *json_msg){        int i = 0;        blob_buf_init(&blob_buf_send, 0);        if (!blobmsg_add_json_from_string(&blob_buf_send, json_msg))        {                fprintf(stderr, "Failed to parse message data\n");                return -1;        }        ubus_send_event(ctx_send, id, blob_buf_send.head);        return 0;}void * pthread_ubus_send(void * arg){    int ret = 0;    char buf[128] = {0};    char buf_send[256] = {0};    while(1)    {        scanf("%s", buf);        printf("----------------------- input is %s\n", buf);        sprintf(buf_send, "{\"heenbo\":\"%s\"}", buf);        my_ubus_send(UBUS_SEND_OBJ_STR, buf_send);        fflush(stdin);    }       return NULL;}int main(int argc, char **argv){    const char *ubus_socket_listen = NULL;        const char *ubus_socket_send = NULL;    printf("sw version: %s, %s\n", __DATE__, __TIME__);    ctx_listen = ubus_connect(ubus_socket_listen);    if (!ctx_listen)    {        fprintf(stderr, "Failed to connect to ubus\n");        return -1;    }    ctx_send = ubus_connect(ubus_socket_send);    if (!ctx_send)    {            fprintf(stderr, "Failed to connect to ubus\n");        return -1;    }    ctx_send->sock.registered = true;    pthread_t pthread_ubus_send_id = -1;    pthread_create(&pthread_ubus_send_id, NULL, pthread_ubus_send, NULL);    listen_main();    ubus_free(ctx_listen);    return 0;}

client2.c

#include <stdio.h>#include <sys/time.h>#include <unistd.h>#include <libubox/ustream.h>#include <libubox/blobmsg_json.h>#include <pthread.h>#include "libubus.h"static struct ubus_context *ctx_listen = NULL;static struct ubus_context *ctx_send = NULL;static struct blob_buf blob_buf_send;static struct ubus_event_handler listener;void * pthread_ubus_send(void * arg);#define UBUS_LISTEN_OBJ_STR "client2"#define UBUS_SEND_OBJ_STR   "client1"static void receive_event(struct ubus_context *ctx, struct ubus_event_handler *ev,              const char *type, struct blob_attr *msg){    char *str;    str = blobmsg_format_json(msg, true);    printf("{ \"%s\": %s }\n", type, str);    free(str);}static void listen_main(void){    const char *event_listen = NULL;    int ret = 0;    memset(&listener, 0, sizeof(listener));    listener.cb = receive_event;    event_listen = UBUS_LISTEN_OBJ_STR;    ret = ubus_register_event_handler(ctx_listen, &listener, event_listen);    if (ret)    {        fprintf(stderr, "Error while registering for event '%s': %s\n",            event_listen, ubus_strerror(ret));        return;    }    uloop_init();    ubus_add_uloop(ctx_listen);    uloop_run();    uloop_done();}static int my_ubus_send(char *id, char *json_msg){        int i = 0;        blob_buf_init(&blob_buf_send, 0);        if (!blobmsg_add_json_from_string(&blob_buf_send, json_msg))        {                fprintf(stderr, "Failed to parse message data\n");                return -1;        }        ubus_send_event(ctx_send, id, blob_buf_send.head);        return 0;}void * pthread_ubus_send(void * arg){    int ret = 0;    char buf[128] = {0};    char buf_send[256] = {0};    while(1)    {        scanf("%s", buf);        printf("----------------------- input is %s\n", buf);        sprintf(buf_send, "{\"heenbo\":\"%s\"}", buf);        my_ubus_send(UBUS_SEND_OBJ_STR, buf_send);        fflush(stdin);    }       return NULL;}int main(int argc, char **argv){    const char *ubus_socket_listen = NULL;        const char *ubus_socket_send = NULL;    printf("sw version: %s, %s\n", __DATE__, __TIME__);    ctx_listen = ubus_connect(ubus_socket_listen);    if (!ctx_listen)    {        fprintf(stderr, "Failed to connect to ubus\n");        return -1;    }    ctx_send = ubus_connect(ubus_socket_send);    if (!ctx_send)    {            fprintf(stderr, "Failed to connect to ubus\n");        return -1;    }    ctx_send->sock.registered = true;    pthread_t pthread_ubus_send_id = -1;    pthread_create(&pthread_ubus_send_id, NULL, pthread_ubus_send, NULL);    listen_main();    ubus_free(ctx_listen);    return 0;}

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