7 files changed, 392 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 00000000..c0050312
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,47 @@
+
+CFLAGS = -O2 -Os -fomit-frame-pointer -fstrength-reduce  -fthread-jumps -fexpensive-optimizations -pipe -I../include -DLinux -DBANK_ONLY
+#CFLAGS = -O2 -Os -fomit-frame-pointer -fstrength-reduce  -fthread-jumps -fexpensive-optimizations -Wall -pipe -I../include -DLinux -DBANK_ONLY
+
+.if defined(DEBUG)
+CFLAGS += -g
+.endif
+
+.if !defined(NOTPTT)
+CFLAGS += -DPTTBBS
+.endif
+
+SERVEROBJ = server.o bankstuff.o money.o
+CLIENTOBJ = client.o bankstuff.o
+EXTFILE = cache passwd stuff
+EXTOBJ = cache.o passwd.o stuff.o
+PROG = client server
+
+.SUFFIXES: .c .o
+.c.o: ; $(CC) $(CFLAGS) -c $*.c
+
+all: $(PROG)
+
+.if !defined(NOTPTT)
+
+cache: ../mbbsd/cache.c
+	$(CC) $(CFLAGS) -c ../mbbsd/cache.c
+
+passwd: ../mbbsd/passwd.c
+	$(CC) $(CFLAGS) -c ../mbbsd/passwd.c
+
+stuff: ../mbbsd/stuff.c
+	$(CC) $(CFLAGS) -c ../mbbsd/stuff.c
+
+.else
+# define your rules here.
+
+.endif
+
+server: $(SERVEROBJ) $(EXTFILE)
+	$(CC) $(CFLAGS) -o server $(SERVEROBJ) $(EXTOBJ)
+
+client: $(CLIENTOBJ)
+	$(CC) $(CFLAGS) -o client $(CLIENTOBJ)
+
+clean:
+	rm -rf *.o $(PROG)
diff --git a/bank.h b/bank.h
new file mode 100644
index 00000000..be331a1d
--- /dev/null
+++ b/bank.h
@@ -0,0 +1,19 @@
+#include "../include/bbs.h"
+
+#define PORT 2003
+
+#ifdef STRLEN
+    #undef STRLEN
+#endif
+#define STRLEN 128
+
+#define ERROR	0x1
+#define SUCCESS	0x2
+#define TIMEOUT	0x4
+
+typedef int response;
+
+typedef struct request{
+    int money;
+    char userid[IDLEN];
+}request;
diff --git a/bankstuff.c b/bankstuff.c
new file mode 100644
index 00000000..c1e7bff6
--- /dev/null
+++ b/bankstuff.c
@@ -0,0 +1,51 @@
+#include "bank.h"
+
+int sockfd;
+
+char* readline(char *str, int timeout){
+    int len;
+    struct timeval tv;
+    fd_set set;
+
+    tv.tv_sec = timeout;
+    tv.tv_usec = 0;
+
+    FD_ZERO(&set);
+    FD_SET(sockfd, &set);
+
+    if (select(sockfd + 1, &set, NULL, NULL,!timeout ? NULL : &tv) <= 0) { ///
+	perror("select");
+	exit(-1);
+    }
+
+    if ((len = read(sockfd, str, STRLEN * sizeof(char))) < 0){
+	herror("readline");
+	exit(-1);
+    }
+    if (len == 0)
+	return NULL;
+    str[len] = 0;
+    read(sockfd, &len, sizeof(char)); // chomp
+    return str;
+}
+
+void writeln(char *str){
+    char n = '\n';
+    write(sockfd, str, strlen(str));
+    write(sockfd, &n, sizeof(n));
+}
+
+void getcmd(char *buf, char *cmd, char *param){
+    int i;
+    for(i = 0; buf[i] && buf[i] != ' ' && i < STRLEN; i++)
+	cmd[i] = buf[i];
+    cmd[i] = 0;
+    if (!buf[i]){
+	param = NULL;
+	return;
+    }
+    buf = &buf[i + 1];
+    for(i = 0; buf[i] && i < STRLEN; i++)
+	param[i] = buf[i];
+    param[i] = 0;
+}
diff --git a/client.c b/client.c
new file mode 100644
index 00000000..926a324a
--- /dev/null
+++ b/client.c
@@ -0,0 +1,56 @@
+#include "bank.h"
+
+extern int sockfd;
+
+char* chomp(char *str){
+    int len;
+    len = strlen(str);
+    if(len > 0 && str[len - 1] == '\n')
+	str[len - 1] = 0;
+    return str;
+}
+
+void client_work(FILE *fp){
+    char buf[STRLEN];
+    while(fgets(buf, sizeof(buf), stdin) != NULL){
+	printf("before sending\n");
+	chomp(buf);
+	writeln(buf);
+	if(!strcasecmp(buf, "quit"))
+	    break;
+	printf("> %s\n", readline(buf, 0));
+    }
+}
+
+void init_net(char *addr){
+    struct hostent *host = NULL;
+    struct sockaddr_in serv_addr;
+
+    if((host = gethostbyname(addr)) == NULL){
+	herror("gethostbyname");
+	exit(-1);
+    }
+    bcopy(host->h_addr, &serv_addr.sin_addr, host->h_length);
+
+    if((sockfd = socket(PF_INET, SOCK_STREAM, 0)) < 0){
+	herror("socket");
+    }
+
+    bzero((char *) &serv_addr, sizeof(serv_addr));
+    serv_addr.sin_family      = AF_INET;
+    serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+    serv_addr.sin_port        = htons(PORT);
+    inet_pton(AF_INET, addr, &serv_addr.sin_addr);
+
+    connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr));
+}
+
+int main(int argc, char **argv){
+//    if(argc != 3)
+//	exit(-1);
+
+    init_net(argv[1]);
+    client_work(stdin);
+
+    return 0;
+}
diff --git a/money.c b/money.c
new file mode 100644
index 00000000..6dd5b21e
--- /dev/null
+++ b/money.c
@@ -0,0 +1,37 @@
+/* 
+ * 若您使用的是 Current Ptt，則不必做任何的修正。
+ * 若您使用的是其他版本的 bbs，請將 Makefile 中的 -DPTTBBS 那行取消掉，
+ * 並自行於下面的 #elseif 之後加入適當的程式碼。
+ */
+
+#define RATE 0.95
+
+int bank_moneyof(int uid){
+#ifdef PTTBBS
+    printf("[server] : uid = %d\n", uid);
+    return moneyof(uid);
+#else
+    //
+#endif
+}
+
+int bank_searchuser(char *userid){
+
+#ifdef PTTBBS
+    return searchuser(userid);
+#else
+    //
+#endif
+}
+
+int bank_deumoney(char *user, int money){
+
+#ifdef PTTBBS
+
+    money *= RATE;
+    printf("give user: %s money: %d add:%d\n", user, moneyof(bank_searchuser(user)), money);
+    deumoney(bank_searchuser(user), money);
+#else
+    //
+#endif
+}
diff --git a/server.c b/server.c
new file mode 100644
index 00000000..ad9b9054
--- /dev/null
+++ b/server.c
@@ -0,0 +1,144 @@
+#include "bank.h"
+
+extern int sockfd;
+
+SHM_t *SHM;
+char *fn_passwd = ".PASSWDS";
+char flag;
+
+typedef struct map_t {
+    char *key;
+    int (*fp)(char *);
+} map_t;
+
+void sig_handler(int signo){
+    pid_t pid;
+    while( (pid = waitpid(-1, NULL, WNOHANG)) > 0)
+	fprintf(stderr, "Child %d terminated\n", pid);
+    exit(0);
+}
+
+int list(char *param){
+    printf("list: %s\n", param);
+    writemsg(SUCCESS, "list success");
+    return 1;
+}
+
+int query(char *param){
+    char buf[STRLEN];
+    sprintf(buf, "%s's money is %d", param, bank_moneyof(bank_searchuser(param)));
+    writemsg(SUCCESS, buf);
+    return 1;
+}
+
+int give(char param[STRLEN]){
+    char user[STRLEN], money[STRLEN];
+    char tmp[STRLEN];
+    printf("give: %s\n", param);
+    getcmd(param, user, money);
+    bank_deumoney(user, atoi(money));
+    sprintf(tmp, "give %s %s", user, money);
+    writemsg(SUCCESS, tmp);
+    return 1;
+}
+
+int quit(char *param){
+    printf("[server] client quit\n");
+    exit(0);
+}
+
+map_t map[] = {
+    {"list", list},
+    {"query", query},
+    {"give", give},
+    {"quit", quit},
+    {"", NULL},
+};
+
+void writemsg(int status, char *str){
+    //write(sockfd, &status. sizeof(status));
+    writeln(str);
+}
+
+void serv_work(void){
+    int i, status = ERROR;
+    char buf[STRLEN], cmd[STRLEN], param[STRLEN];
+
+    fprintf(stderr, "new child\n");
+
+    attach_SHM();
+
+    while(readline(buf, 600) != NULL){
+	printf("[server] read: ");
+	puts(buf);
+	getcmd(buf, cmd, param);
+	for (i = 0; map[i].fp; i++){
+	    if (!strcasecmp(map[i].key, cmd)){
+		status = (*(map[i].fp))(param);
+		break;
+	    }
+	}
+	if(!map[i].fp){
+	    writemsg(ERROR, "Wrong command");
+	    strcpy(param, "error");
+	}
+	printf("[server] complete\n");
+    }
+}
+
+int check_perm(char *ip){
+}
+
+int main(int argc, char **argv){
+    int listenfd;
+    pid_t pid;
+    socklen_t addr_len;
+    struct sockaddr_in serv_addr;
+
+    listenfd = socket(PF_INET, SOCK_STREAM, 0);
+
+    bzero((char *) &serv_addr, sizeof(serv_addr));
+    serv_addr.sin_family      = AF_INET;
+    serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+    serv_addr.sin_port        = htons(PORT);
+
+    bind(listenfd,(struct sockaddr *) &serv_addr, sizeof(serv_addr));
+    listen(listenfd, 5);
+    signal(SIGCHLD, sig_handler);
+
+    while(1){
+	addr_len = sizeof(serv_addr);
+
+	if( (sockfd = accept(listenfd,(struct sockaddr *) &serv_addr, &addr_len)) < 0){
+	    if(errno == EINTR)
+		continue;
+	    else
+		herror("accept");
+	}
+#define NOFORK 1
+#if NOFORK
+	if((pid = fork()) < 0)
+	    perror("fork");
+	
+	else if(pid == 0){
+#endif
+	    int len;
+	    struct sockaddr_in name;
+	    close(listenfd);
+
+	    if(getpeername(sockfd,(struct sockaddr *) &name, &len) < 0){
+		perror("getpeername");
+		exit(-1);
+	    }
+	    else{
+		printf("address: %s\n", inet_ntoa(((struct sockaddr_in *) &name)->sin_addr));
+	    }
+	    serv_work();
+	    exit(0);
+#if NOFORK
+	}
+#endif
+	close(sockfd);
+    }
+    return 0;
+}
diff --git a/spec b/spec
new file mode 100644
index 00000000..a9b0d190
--- /dev/null
+++ b/spec
@@ -0,0 +1,38 @@
+
+Use Case:
+  list:
+    列出所有接受轉帳的站台。
+  query site:
+    列出 site 這個站的資訊，包括匯率等。
+  quit:
+    切斷連線離開。
+
+
+
+
+   +-------+                                             +-------+ 
+ +-------+ |    +----------+            +----------+   +-------+ |
+ | client|-+ ---| bankd(1) | <--------> | bankd(2) |---| client|-+
+ +-------+      +----------+            +----------+   +-------+
+
+ client: 
+
+Note:
+  client 能夠改 source，所以請務必注意 server 一定要小心防止 client
+  的惡搞
+
+Protocol (between banks):
+  1.假設 bankd(1) 為 Ptt 這端的 daemon，bankd(2) 為 Ptt2 這端的。
+  2.當 Ptt 上有人想匯錢給 Ptt2 上的人，Ptt user(mbbsd) 這邊會開啟與
+    指定機器上 bank 的連線。[1]
+  3.Client 先扣除自己的錢[2]，再跟 server 說他要轉帳的對象跟金額。
+  4.Server 進行確認動作
+    1) 確定對方紀錄的匯率與自己相同。不同則回應錯誤。
+    2) 確定此人是否存在。是，則將錢匯入，回應成功訊息；否，則回應錯
+       誤。
+  5.根據 server 的回應做出動作。成功則不做任何事，失敗就將自己的錢
+    加回來。
+
+
+ [1] 不加密的原因是 ... 懶 :p 有需要的話直接拿 ssh tunnel 來用吧 :p
+ [2] 避免有人送錢之後惡意斷線，造成錢有增無減。