feat: main

This commit is contained in:
Renge 2022-05-04 17:04:25 -04:00
parent 8d089808b6
commit 53bfd71f9f
4 changed files with 1319 additions and 6 deletions

199
hw5/include/csapp.h Normal file
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@ -0,0 +1,199 @@
/*
* csapp.h - prototypes and definitions for the CS:APP3e book
*/
/* $begin csapp.h */
#ifndef __CSAPP_H__
#define __CSAPP_H__
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <setjmp.h>
#include <signal.h>
#include <dirent.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <errno.h>
#include <math.h>
#include <pthread.h>
#include <semaphore.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
/* Default file permissions are DEF_MODE & ~DEF_UMASK */
/* $begin createmasks */
#define DEF_MODE S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH
#define DEF_UMASK S_IWGRP|S_IWOTH
/* $end createmasks */
/* Simplifies calls to bind(), connect(), and accept() */
/* $begin sockaddrdef */
typedef struct sockaddr SA;
/* $end sockaddrdef */
/* Persistent state for the robust I/O (Rio) package */
/* $begin rio_t */
#define RIO_BUFSIZE 8192
typedef struct {
int rio_fd; /* Descriptor for this internal buf */
int rio_cnt; /* Unread bytes in internal buf */
char *rio_bufptr; /* Next unread byte in internal buf */
char rio_buf[RIO_BUFSIZE]; /* Internal buffer */
} rio_t;
/* $end rio_t */
/* External variables */
extern int h_errno; /* Defined by BIND for DNS errors */
extern char **environ; /* Defined by libc */
/* Misc constants */
#define MAXLINE 8192 /* Max text line length */
#define MAXBUF 8192 /* Max I/O buffer size */
#define LISTENQ 1024 /* Second argument to listen() */
/* Our own error-handling functions */
void unix_error(char *msg);
void posix_error(int code, char *msg);
void dns_error(char *msg);
// void gai_error(int code, char *msg);
void app_error(char *msg);
/* Process control wrappers */
pid_t Fork(void);
void Execve(const char *filename, char *const argv[], char *const envp[]);
pid_t Wait(int *status);
pid_t Waitpid(pid_t pid, int *iptr, int options);
void Kill(pid_t pid, int signum);
unsigned int Sleep(unsigned int secs);
void Pause(void);
unsigned int Alarm(unsigned int seconds);
void Setpgid(pid_t pid, pid_t pgid);
pid_t Getpgrp();
/* Signal wrappers */
typedef void handler_t(int);
handler_t *Signal(int signum, handler_t *handler);
void Sigprocmask(int how, const sigset_t *set, sigset_t *oldset);
void Sigemptyset(sigset_t *set);
void Sigfillset(sigset_t *set);
void Sigaddset(sigset_t *set, int signum);
void Sigdelset(sigset_t *set, int signum);
int Sigismember(const sigset_t *set, int signum);
int Sigsuspend(const sigset_t *set);
/* Sio (Signal-safe I/O) routines */
ssize_t sio_puts(char s[]);
ssize_t sio_putl(long v);
void sio_error(char s[]);
/* Sio wrappers */
ssize_t Sio_puts(char s[]);
ssize_t Sio_putl(long v);
void Sio_error(char s[]);
/* Unix I/O wrappers */
int Open(const char *pathname, int flags, mode_t mode);
ssize_t Read(int fd, void *buf, size_t count);
ssize_t Write(int fd, const void *buf, size_t count);
off_t Lseek(int fildes, off_t offset, int whence);
void Close(int fd);
int Select(int n, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
struct timeval *timeout);
int Dup2(int fd1, int fd2);
void Stat(const char *filename, struct stat *buf);
void Fstat(int fd, struct stat *buf) ;
/* Directory wrappers */
DIR *Opendir(const char *name);
struct dirent *Readdir(DIR *dirp);
int Closedir(DIR *dirp);
/* Memory mapping wrappers */
void *Mmap(void *addr, size_t len, int prot, int flags, int fd, off_t offset);
void Munmap(void *start, size_t length);
/* Standard I/O wrappers */
void Fclose(FILE *fp);
FILE *Fdopen(int fd, const char *type);
char *Fgets(char *ptr, int n, FILE *stream);
FILE *Fopen(const char *filename, const char *mode);
void Fputs(const char *ptr, FILE *stream);
size_t Fread(void *ptr, size_t size, size_t nmemb, FILE *stream);
void Fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream);
/* Dynamic storage allocation wrappers */
void *Malloc(size_t size);
void *Realloc(void *ptr, size_t size);
void *Calloc(size_t nmemb, size_t size);
void Free(void *ptr);
/* Sockets interface wrappers */
int Socket(int domain, int type, int protocol);
void Setsockopt(int s, int level, int optname, const void *optval, int optlen);
void Bind(int sockfd, struct sockaddr *my_addr, int addrlen);
void Listen(int s, int backlog);
int Accept(int s, struct sockaddr *addr, socklen_t *addrlen);
void Connect(int sockfd, struct sockaddr *serv_addr, int addrlen);
/* Protocol independent wrappers */
void Getaddrinfo(const char *node, const char *service,
const struct addrinfo *hints, struct addrinfo **res);
void Getnameinfo(const struct sockaddr *sa, socklen_t salen, char *host,
size_t hostlen, char *serv, size_t servlen, int flags);
void Freeaddrinfo(struct addrinfo *res);
void Inet_ntop(int af, const void *src, char *dst, socklen_t size);
void Inet_pton(int af, const char *src, void *dst);
/* DNS wrappers */
struct hostent *Gethostbyname(const char *name);
struct hostent *Gethostbyaddr(const char *addr, int len, int type);
/* Pthreads thread control wrappers */
void Pthread_create(pthread_t *tidp, pthread_attr_t *attrp,
void * (*routine)(void *), void *argp);
void Pthread_join(pthread_t tid, void **thread_return);
void Pthread_cancel(pthread_t tid);
void Pthread_detach(pthread_t tid);
void Pthread_exit(void *retval);
pthread_t Pthread_self(void);
void Pthread_once(pthread_once_t *once_control, void (*init_function)());
/* POSIX semaphore wrappers */
void Sem_init(sem_t *sem, int pshared, unsigned int value);
void P(sem_t *sem);
void V(sem_t *sem);
/* Rio (Robust I/O) package */
ssize_t rio_readn(int fd, void *usrbuf, size_t n);
ssize_t rio_writen(int fd, void *usrbuf, size_t n);
void rio_readinitb(rio_t *rp, int fd);
ssize_t rio_readnb(rio_t *rp, void *usrbuf, size_t n);
ssize_t rio_readlineb(rio_t *rp, void *usrbuf, size_t maxlen);
/* Wrappers for Rio package */
ssize_t Rio_readn(int fd, void *usrbuf, size_t n);
void Rio_writen(int fd, void *usrbuf, size_t n);
void Rio_readinitb(rio_t *rp, int fd);
ssize_t Rio_readnb(rio_t *rp, void *usrbuf, size_t n);
ssize_t Rio_readlineb(rio_t *rp, void *usrbuf, size_t maxlen);
/* Reentrant protocol-independent client/server helpers */
int open_clientfd(char *hostname, char *port);
int open_listenfd(char *port);
/* Wrappers for reentrant protocol-independent client/server helpers */
int Open_clientfd(char *hostname, char *port);
int Open_listenfd(char *port);
#endif /* __CSAPP_H__ */
/* $end csapp.h */

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hw5/include/excludes.h Normal file
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hw5/src/csapp.c Normal file

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@ -1,11 +1,11 @@
#include <stdlib.h> #define _GNU_SOURCE
#include <unistd.h>
#include "pbx.h" #include "pbx.h"
#include "server.h" #include "server.h"
#include "debug.h" #include "debug.h"
#include "csapp.h"
static void terminate(int status); static void terminate(int status);
void sighandler(int sig);
/* /*
* "PBX" telephone exchange simulation. * "PBX" telephone exchange simulation.
@ -27,10 +27,50 @@ int main(int argc, char* argv[]){
// a SIGHUP handler, so that receipt of SIGHUP will perform a clean // a SIGHUP handler, so that receipt of SIGHUP will perform a clean
// shutdown of the server. // shutdown of the server.
fprintf(stderr, "You have to finish implementing main() " // check arg counts and second arg valid
"before the PBX server will function.\n"); if (argc != 3 || argv[1][0] != '-' || argv[1][1] != 'p' || argv[1][2] != '\0')
{
fprintf(stderr, "Usage: ./pbx -p <port>\n");
terminate(EXIT_FAILURE); terminate(EXIT_FAILURE);
}
// check port num
int port = 0;
char* ptr = argv[2];
while (*ptr)
{
if (*ptr > '9' || *ptr < '0' || port > 65535)
{
fprintf(stderr, "Please provide a valid port number\n");
terminate(EXIT_FAILURE);
}
port *= 10;
port += *ptr - '0';
ptr ++;
}
// install SIGHUP handler
struct sigaction act;
act.sa_handler = sighandler;
if(sigaction(SIGHUP, &act, NULL)<0)
{
fprintf(stderr, "Failed to install a SIGHUP handler");
terminate(EXIT_FAILURE);
}
// multi threading & socket connection
int listenfd, *connfdp;
socklen_t clientlen;
struct sockaddr_storage clientaddr;
pthread_t tid;
listenfd = Open_listenfd(argv[2]);
while (1) {
clientlen = sizeof(struct sockaddr_storage);
connfdp = Malloc(sizeof(int));
*connfdp = Accept(listenfd, (SA *) &clientaddr, &clientlen);
Pthread_create(&tid, NULL, (void*) pbx_client_service, connfdp);
}
terminate(EXIT_SUCCESS);
} }
/* /*
@ -42,3 +82,9 @@ static void terminate(int status) {
debug("PBX server terminating"); debug("PBX server terminating");
exit(status); exit(status);
} }
void sighandler(int sig)
{
debug("Server turned down successfully...");
terminate(EXIT_SUCCESS);
}