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kadai4_server.c
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kadai4_server.c
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/* 課題4 */
/* サーバ */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <signal.h>
#include <unistd.h>
#include <netdb.h>
#define MSG_STOCK 10
/* Function prototype declare */
void Download(void);
void Upload(void);
int SearchMessageTime(int Year, int Month, int Day, int Hour, int Min, int HourOff, int MinOff);
void SendTimeAndName(int num);
int RequestCheck(char *msg1,char *msg2,char *msg3);
int StrComp(char str1[], char str2[]);
void InitialRcvBuf(char *Buf);
void Interrupt(int signalType);
struct MSG {
char name[32];
int year;
int month;
int day;
int hour, min, sec;
char week[8];
char msg[512];
};
struct TIME {
int year, month, day, hour, min, priority, max_flag;
};
struct MSG message[MSG_STOCK];
struct TIME para[MSG_STOCK];
int ssock;
int csock;
int MsgNotFlag = 1;
int MsgMaxFlag = 0;
int MsgNum = -1;
int main(int argc, char *argv[])
{
struct sockaddr_in saddr;
struct sockaddr_in caddr;
struct sigaction handler;
int BindCheck, ReqCheck, Mode;
int alen = sizeof(caddr);
int flag = 1;
char RcvBuf[32];
char SendMsg[32];
char *GET, *FileName, *HTTP, *Ver;
/* Message set */
strcpy(SendMsg, "Server received HTTP request!\0\n");
printf("Server set up!\n\n");
handler.sa_handler=Interrupt;
if(sigfillset(&handler.sa_mask) < 0)
exit(1);
handler.sa_flags=0;
if(sigaction(SIGINT,&handler,0) < 0)
exit(1);
ssock = socket(PF_INET,SOCK_STREAM,IPPROTO_TCP);
memset(&saddr,0,sizeof(saddr));
saddr.sin_family=AF_INET;
saddr.sin_addr.s_addr=htonl(INADDR_ANY);
saddr.sin_port=htons(atoi(argv[1]));
setsockopt(ssock,SOL_SOCKET,SO_REUSEADDR,&flag,sizeof(flag));
BindCheck = bind(ssock,(struct sockaddr*)&saddr,sizeof(saddr));
if(BindCheck == -1)
{
printf("This port number cannot use!\n");
printf("Program exit.\n");
exit(1);
}
listen(ssock,10);
while(1)
{
csock = accept(ssock,(struct sockaddr*)&caddr,&alen);
if(csock == -1)
{
printf("Accept failed.\n");
printf("Program exit.\n\n");
exit(1);
}
printf("--------------------------------------------------\n\n");
/* HTTP request receive */
InitialRcvBuf(RcvBuf);
recv(csock, RcvBuf, 32, 0);
GET = strtok(RcvBuf, "/");
FileName = strtok(NULL, " ");
HTTP = strtok(NULL, "/");
Ver = strtok(NULL, "\n");
/* HTTP request check */
ReqCheck = RequestCheck(GET, HTTP, Ver);
if(ReqCheck == 0)
{
printf("Request message:%s/%s %s/%s\n",GET, FileName, HTTP, Ver);
printf("File name:%s\n",FileName);
}
send(csock, SendMsg, strlen(SendMsg), 0);
sleep(1);
/* Download or Upload receive */
recv(csock, &Mode, sizeof(int), 0);
/* Download */
if(Mode == 1)
Download();
/* Upload */
else if(Mode == 2)
Upload();
close(csock);
}
}
void Download(void)
{
int Search, RcvData;
char SendMsg_d1[32], SendMsg_d2[40], SendMsg_d3[40], SendMsg_d4[64], SendMsg_d5[64];
char RcvBuf_Name[32];
/* Message set */
strcpy(SendMsg_d1, "Request mode is Download.\0\n");
strcpy(SendMsg_d2, "Message search use messanger's name.\0\n");
strcpy(SendMsg_d3, "Message search use upload time.\0\n");
strcpy(SendMsg_d4, "Select the newest message.\0\n");
strcpy(SendMsg_d5, "Select the oldest message.\0\n");
printf("Mode:Download\n");
send(csock, SendMsg_d1, strlen(SendMsg_d1), 0);
sleep(1);
/* Message stock check */
if(MsgNotFlag == 1)
{
printf("Message stock is not!\n");
send(csock, &MsgNotFlag, sizeof(int), 0);
sleep(1);
return;
}
send(csock, &MsgNotFlag, sizeof(int), 0);
sleep(1);
/* Search key receive */
recv(csock, &Search, sizeof(int), 0);
/* Name */
if(Search == 1)
{
printf("Search:Name\n");
send(csock, SendMsg_d2, strlen(SendMsg_d2), 0);
sleep(1);
printf("Search name:");
/* Name receive */
int i = 0;
InitialRcvBuf(RcvBuf_Name);
while(1)
{
RcvData = recv(csock, &RcvBuf_Name[i], 1, 0);
if(RcvBuf_Name[i]=='\0')
break;
else
printf("%s",&RcvBuf_Name[i]);
i++;
}
int CompResult;
int SearchFlag = 0;
for(i=MsgNum; i>=0; i--)
{
/* Name search */
CompResult = StrComp(message[i].name, RcvBuf_Name);
if(CompResult == 0)
{
/* Message send */
printf("\n");
printf("File found!\n");
SendTimeAndName(i);
send(csock, message[i].msg, strlen(message[i].msg), 0);
sleep(1);
SearchFlag = 1;
printf("--------------------------------------------------\n\n");
break;
}
}
if(SearchFlag == 0)
{
printf("\n");
printf("Message not found.\n");
printf("--------------------------------------------------\n\n");
}
}
/* Time */
else if(Search == 2)
{
int Year, Month, Day, Hour, Min, HourOff, MinOff;
int Num;
printf("Search:Time\n");
send(csock, SendMsg_d3, strlen(SendMsg_d3), 0);
sleep(1);
recv(csock, &Year, sizeof(int), 0);
recv(csock, &Month, sizeof(int), 0);
recv(csock, &Day, sizeof(int), 0);
recv(csock, &Hour, sizeof(int), 0);
recv(csock, &HourOff, sizeof(int), 0);
recv(csock, &Min, sizeof(int), 0);
recv(csock, &MinOff, sizeof(int), 0);
printf("Request time: %d %d %d %d(+-%d):%d(+-%d)\n",Year, Month, Day,
Hour, HourOff, Min, MinOff);
Num = SearchMessageTime(Year, Month, Day, Hour, Min, HourOff, MinOff);
printf("\n");
printf("File found!\n");
SendTimeAndName(Num);
send(csock, message[Num].msg, strlen(message[Num].msg), 0);
sleep(1);
printf("Send to client was finished!\n");
printf("--------------------------------------------------\n\n");
}
/* The newest */
else if(Search == 3)
{
send(csock, SendMsg_d4, strlen(SendMsg_d4), 0);
sleep(1);
printf("\n");
printf("File found!\n");
SendTimeAndName(MsgNum);
send(csock, message[MsgNum].msg, strlen(message[MsgNum].msg), 0);
sleep(1);
printf("Send to client was finished!\n");
printf("--------------------------------------------------\n\n");
}
/* The oldest */
else if(Search == 4)
{
send(csock, SendMsg_d5, strlen(SendMsg_d5), 0);
sleep(1);
printf("\n");
printf("File found!\n");
SendTimeAndName(0);
send(csock, message[0].msg, strlen(message[0].msg), 0);
sleep(1);
printf("Send to client was finished!\n");
printf("--------------------------------------------------\n\n");
}
}
int SearchMessageTime(int Year, int Month, int Day, int Hour, int Min, int HourOff, int MinOff)
{
int i, DecidedNum;
int HourMinus, HourPlus, MinMinus, MinPlus;
int PriorityMax = 0;
int MaxCount = 0;
/* Min offset */
MinMinus = Min - MinOff;
if(MinMinus < 0)
MinMinus = 0;
MinPlus = Min + MinOff;
if(MinPlus > 59)
MinPlus = 59;
/* Hour offset */
HourMinus = Hour - HourOff;
if(HourMinus < 0)
HourMinus = 0;
HourPlus = Hour + HourOff;
if(HourPlus > 23)
HourPlus = 23;
/* Time check */
for(i=0; i<=MsgNum; i++)
{
if(Year == message[MsgNum].year)
para[i].year = 1;
if(Month == message[MsgNum].month)
para[i].month = 1;
if(Day == message[MsgNum].day)
para[i].day = 1;
if(Hour == message[MsgNum].hour)
para[i].hour = 1;
else if((HourMinus <= Hour)&&(Hour <= HourPlus))
para[i].hour = 1;
if(Min == message[MsgNum].min)
para[i].min = 1;
else if((MinMinus <= Min)&&(Min <= MinPlus))
para[i].min = 1;
para[i].priority = para[i].year + para[i].month + para[i].day + para[i].hour + para[i].min;
if(para[i].priority >= PriorityMax)
PriorityMax = para[i].priority;
}
for(i=0; i<=MsgNum; i++)
{
if(para[i].priority == PriorityMax)
{
para[i].max_flag = 1;
MaxCount++;
}
}
for(i=MsgNum; i>=0; i--)
{
if(para[i].max_flag == 1)
{
DecidedNum = i;
break;
}
}
return DecidedNum;
}
void SendTimeAndName(int num)
{
send(csock, message[num].name, strlen(message[num].name), 0);
sleep(1);
send(csock, &message[num].year, sizeof(int), 0);
send(csock, &message[num].month, sizeof(int), 0);
send(csock, &message[num].day, sizeof(int), 0);
send(csock, &message[num].hour, sizeof(int), 0);
send(csock, &message[num].min, sizeof(int), 0);
send(csock, &message[num].sec, sizeof(int), 0);
send(csock, message[num].week, strlen(message[num].week), 0);
sleep(1);
}
void Upload(void)
{
int RcvData;
char SendMsg_u1[32], SendMsg_u2[128]="", SendMsg_u3[64], SendMsg_u4[32];
/* Message set */
strcpy(SendMsg_u1, "Request mode is Upload.\0\n");
strcpy(SendMsg_u2, "Time.\0\n");
strcpy(SendMsg_u3, "Message stock is max, so you cannot upload!\0\n");
strcpy(SendMsg_u4, "You can upload!\0\n");
printf("Mode:Upload\n\n");
send(csock, SendMsg_u1, strlen(SendMsg_u1), 0);
sleep(1);
/* Message stock check */
if(MsgMaxFlag == 1)
{
printf("Message stock is max!\n");
send(csock, &MsgMaxFlag, sizeof(int), 0);
sleep(1);
return;
}
send(csock, &MsgMaxFlag, sizeof(int), 0);
sleep(1);
/* Messgae stock count increment */
MsgNum++;
/* Upload name receive */
InitialRcvBuf(message[MsgNum].name);
recv(csock, message[MsgNum].name, 32, 0);
printf("Upload name:%s\n",message[MsgNum].name);
/* Upload time receive */
recv(csock, &message[MsgNum].year, sizeof(int), 0);
recv(csock, &message[MsgNum].month, sizeof(int), 0);
recv(csock, &message[MsgNum].day, sizeof(int), 0);
recv(csock, &message[MsgNum].hour, sizeof(int), 0);
recv(csock, &message[MsgNum].min, sizeof(int), 0);
recv(csock, &message[MsgNum].sec, sizeof(int), 0);
recv(csock, message[MsgNum].week, 8, 0);
sprintf(SendMsg_u2, "Upload time: %d %d %d(%s) %d:%d:%d\n",
message[MsgNum].year, message[MsgNum].month,
message[MsgNum].day, message[MsgNum].week,
message[MsgNum].hour, message[MsgNum].min, message[MsgNum].sec);
send(csock, SendMsg_u2, strlen(SendMsg_u2), 0);
sleep(1);
puts(SendMsg_u2);
/* Upload message receive */
printf("Upload message:\n");
char MSGBUF[32];
int i = 0;
InitialRcvBuf(MSGBUF);
while(1)
{
RcvData = recv(csock, MSGBUF, 1, 0);
if(RcvData == 0)
break;
printf("%s",MSGBUF);
strcpy(&message[MsgNum].msg[i], MSGBUF);
i++;
}
printf("\n");
printf("--------------------------------------------------\n\n");
/* Message stock check */
if(MsgNum == MSG_STOCK-1)
{
printf("Message stock max!\n");
MsgMaxFlag = 1;
}
MsgNotFlag = 0;
}
int RequestCheck(char *msg1,char *msg2,char *msg3)
{
char Err_Msg[28];
strcpy(Err_Msg,"Request message is not true.");
/* "GET" check */
if((msg1[0]!='G')||(msg1[1]!='E')||(msg1[2]!='T')||(msg1[3]!=' '))
{
send(csock,Err_Msg,strlen(Err_Msg),0);
printf("\n%s\n",Err_Msg);
printf("%s:bad message.\n",msg1);
printf("------------------------------\n\n");
return -1;
}
/* "HTTP" check */
if((msg2[0]!='H')||(msg2[1]!='T')||(msg2[2]!='T')||(msg2[3]!='P'))
{
send(csock,Err_Msg,strlen(Err_Msg),0);
printf("\n%s\n",Err_Msg);
printf("%s:bad message.\n",msg2);
printf("------------------------------\n\n");
return -1;
}
/* "Ver" check */
if((msg3[0]!='1')||(msg3[1]!='.')||(msg3[2]!='1'))
{
send(csock,Err_Msg,strlen(Err_Msg),0);
printf("\n%s\n",Err_Msg);
printf("%s:bad message.\n",msg3);
printf("------------------------------\n\n");
return -1;
}
return 0;
}
int StrComp(char str1[], char str2[])
{
int i;
for(i=0; str1[i] == str2[i]; i++)
{
if(str1[i] == '\0')
{
return 0;
}
}
return str1[i] - str2[i];
}
void InitialRcvBuf(char *Buf)
{
int i = 0;
while(1)
{
if(Buf[i] != 0)
Buf[i]=0;
else
break;
i++;
}
}
void Interrupt(int signalType)
{
printf("\nInterrupt!\n");
printf("Signal:%d\n\n",signalType);
close(ssock);
exit(1);
}