IOS — 关于Socket传输文件需要自定义延时或者包大小的情况

1. 首先导入头文件

#include <stdio.h>

#include <errno.h>

#include <string.h>

#include <unistd.h>

#include <netdb.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <sys/types.h>

#include <arpa/inet.h>

#include <sys/stat.h>

2。定义全局变量

int delay;

int sockfd;

char buffer[1024];

struct sockaddr_in sa;

#define sigbuf_lens 512 // 设置包的大小

3. 在获取到是其他设备的IP地址之后 复制一下代码

UrlStr = listarr[0]; // UrlStr为获取到的服务器的地址

struct sockaddr_in server_addr;

struct hostent *host;

int portnumber; // 端口号

portnumber = 80;

host = (__bridge struct hostent *)(UrlStr);

if((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1)

{

fprintf(stderr,"Socket Error:%s\a\n",strerror(errno));

exit(1);

　　}

NSString *addrString = UrlStr;

struct in_addr addr;

if (inet_aton([addrString UTF8String], &addr) != 0) {

uint32_t ip = ntohl(addr.s_addr);

NSLog(@"%08x", ip);

} else {

NSLog(@"invalid address");

}

bzero(&server_addr,sizeof(server_addr));

server_addr.sin_family=AF_INET;

server_addr.sin_port=htons(portnumber);

server_addr.sin_addr =   addr;

if(connect(sockfd,(struct  sockaddr  *)(&server_addr),sizeof(struct

sockaddr))==-1)

{

fprintf(stderr,"Connect Error:%s\a\n",strerror(errno));

exit(1);

}

int len = sizeof(sa);

if(!getsockname(sockfd, &sa, &len))//ªÒ»°±æµÿIPµÿ÷∑

{

printf("Local IP£∫%s\n", inet_ntoa(sa.sin_addr));

}

const char * filePathChar = [_upFilePath UTF8String];//_upFilePath 为你需要上传的文件的路径

uint8_t* upDataFilePath = (uint8_t*)filePathChar;

sys_update(upDataFilePath);// 调取升级方法

4. 发送文件的方法

void sys_update(uint8_t *file_name)

{

printf("Start to update:%s, delay:%dmS, lens:%d\n", file_name, delay, sigbuf_lens);

/*sprintf(buffer, CMD_GET_INFO, inet_ntoa(sa.sin_addr));

if(write(sockfd, buffer, strlen(buffer)))     {

fprintf(stderr,"Read Error:%s\n",strerror(errno));

exit(1);

}*/

/*if((nbytes=read(sockfd,buffer,1024))==-1)

{

fprintf(stderr,"Read Error:%s\n",strerror(errno));

exit(1);

}

buffer[nbytes]='\0';

uint8_t *index = strstr(buffer, "iot_version")+1;

if( < 0)*/

FILE *fil;

fil = fopen(file_name, "r");//¥Úø™…˝º∂Œƒº˛

if(fil == NULL)

{

printf("open Image FILE fail !! \n");

exit(0);

}

struct stat statbuf;

stat(file_name, &statbuf);

printf("Get File leng = %lld\n", statbuf.st_size);

sprintf(buffer, CMD_UPDATE_START, inet_ntoa(sa.sin_addr));

if(write(sockfd, buffer, strlen(buffer)) < 0){

fprintf(stderr,"CMD_UPDATE_START Error:%s\n",strerror(errno));

exit(1);

}

usleep(1000000);

printf("Start Update\n");

sprintf(buffer, CMD_UPDATE, inet_ntoa(sa.sin_addr), statbuf.st_size);

if(write(sockfd, buffer, strlen(buffer)) < 0){

fprintf(stderr,"CMD_UPDATE Error:%s\n",strerror(errno));

exit(1);

}

sleep(1);

uint32_t i;

for(i=0;i<statbuf.st_size/sigbuf_lens;i++)

{

if( fread(buffer, sigbuf_lens, 1, fil) <= 0)

{

printf("Cannot Read the File!\n");

exit(0);

}

if(write(sockfd, buffer, sigbuf_lens) < 0){

fprintf(stderr,"UPDATE DATA Error:%s\n",strerror(errno));

exit(1);

}

//if(i%10 == 0) {

printf("\rUpdateing %d/%lld", sigbuf_lens*i, statbuf.st_size);

printf(" %lld%%", (i*100)/(statbuf.st_size/sigbuf_lens));

fflush(stdout);

}

usleep(100 * 1000);// 设置数据包之间延时的时间

}

if(statbuf.st_size%sigbuf_lens)//∑¢ÀÕŒƒº˛ƒ©Œ≤≤ø∑÷{

if( fread(buffer, statbuf.st_size%sigbuf_lens, 1, fil) <= 0) {

printf("Cannot Read the File!\n");

exit(0);

}

if(write(sockfd, buffer, statbuf.st_size%sigbuf_lens) < 0){

fprintf(stderr,"UODATE DATA Error:%s\n",strerror(errno));

exit(1);

}

}

//printf("\rUpdateing %d/%d", statbuf.st_size, statbuf.st_size);

//printf(" %d%%\n", 100);

printf("\n");

fflush(stdout);

sleep(1);

sprintf(buffer, CMD_UPDATE_REBOOT, inet_ntoa(sa.sin_addr));

if(write(sockfd, buffer, strlen(buffer)) < 0){

fprintf(stderr,"CMD_UPDATE_REBOOT Error:%s\n",strerror(errno));

exit(1);

}

printf("Update End\n");

}

　　//   发送完成   搞定