c语言fd传入进程,c语言多进程tcp服务器示例

古城微笑少年丶 2022-10-14 12:51 129阅读 0赞

\#include "server.h"

/\*

\* Create a TCP Server

\* Return socketfd

\*/

int create\_tcpsvr(char \*ip,int port)

int sockfd;

struct sockaddr\_in addr;

if ((sockfd = socket(AF\_INET, SOCK\_STREAM, 0)) == EOF)\{

perror("create\_tcpsvr(),socket()");

exit(EXIT\_FAILURE);

fill\_sockaddr(&addr,ip,port);

if (bind(sockfd, (struct sockaddr \*)&addr, sizeof(addr)) == EOF)\{

perror("create\_tcpsvr(),bind()");

exit(EXIT\_FAILURE);

if (listen(sockfd,LISTENTQ) == EOF) \{

perror("create\_tcpsvr(),bind()");

exit(EXIT\_FAILURE);

return sockfd;

/\*\*

\* Set TCP server's address

\*/

void fill\_sockaddr(struct sockaddr\_in \*addr, char \*ip, int port)

assert(addr);

addr -> sin\_family = AF\_INET;

addr -> sin\_port = htons(port?port:DEF\_PORT);

if (ip == NULL) \{

addr -> sin\_addr.s\_addr = htonl(INADDR\_ANY);

\} else if((addr -> sin\_addr.s\_addr = inet\_addr(ip)) == EOF) \{

perror("fill\_sockaddr(),inet\_addr()");

exit(EXIT\_FAILURE);

/\*

\* Communicate to client

\*/

void comm\_to\_clt(int listenfd)

printf("TCP SERVER IS WAITING!n");

struct epoll\_event events\[MAX\_EPOLL\_SIZE\];

int fd\_num;

int epollfd = init\_epoll(listenfd);

while (1) \{

fd\_num = epoll\_wait(epollfd,events,MAX\_EPOLL\_SIZE,-1);

if (fd\_num == EOF) \{

perror("comm\_to\_clt(),epoll\_wait()");

continue;

while (--fd\_num >= 0) \{

epoll\_business(epollfd, listenfd, events\[fd\_num\]);

/\*

\* Initlization epoll

\*/

int init\_epoll(int listenfd)

struct epoll\_event ev;

int epollfd;

if((epollfd = epoll\_create(MAX\_EPOLL\_SIZE)) == EOF) \{

perror("init\_epoll(),epoll\_create()");

exit(EXIT\_FAILURE);

ev.events = EPOLLIN;

ev.data.fd = listenfd;

if (epoll\_ctl(epollfd, EPOLL\_CTL\_ADD,listenfd, &ev)) \{

perror("init\_epoll(),epoll\_ctl()");

exit(EXIT\_FAILURE);

return epollfd;

/\*

\* Respond for io change

\*/

void epoll\_business(int epollfd, int listenfd, struct epoll\_event ev)

struct epoll\_event ev\_n;

if (ev.data.fd == listenfd) \{

int clt\_fd = accept(listenfd, 0, 0);

if (clt\_fd == EOF) \{

perror("epoll\_business(), accept()");

return;

fcntl(clt\_fd, F\_SETFL, O\_NONBLOCK);

ev\_n.events = EPOLLIN|EPOLLET;

ev\_n.data.fd = clt\_fd;

if (epoll\_ctl(epollfd,EPOLL\_CTL\_ADD, clt\_fd, &ev\_n) == EOF) \{

perror("epoll\_business(), epoll\_ctl()");

return;

\}else \{

main\_service(ev.data.fd);

if (epoll\_ctl(epollfd,EPOLL\_CTL\_DEL, ev.data.fd, &ev) == EOF) \{

perror("epoll\_business(), epoll\_ctl()");

close(ev.data.fd);

/\*

\* Create some process

\*/

void create\_process(int sockfd, int i)

/\*

\* Avoid zombie process

\*/

signal(SIGCHLD,SIG\_IGN);

while (i--) \{

if (fork() == 0) \{

comm\_to\_clt(sockfd);

while(1)\{

sleep(100);

int main(int argc, char \*argv\[\])

int sockfd = create\_tcpsvr(0, 0);

create\_process(sockfd,DEF\_PROCESS\_NUM);

exit(EXIT\_SUCCESS);

c语言fd传入进程,c语言多进程tcp服务器示例

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