X-Git-Url: http://gb7djk.dxcluster.net/gitweb/gitweb.cgi?a=blobdiff_plain;f=src%2Fclient.c;h=382c852b1310752ddbcdf707b45b84b4ce3b530d;hb=bff9ecf00b14e7d71d9504088a2fd7b9e5115fe1;hp=3dadfc59785c3dcab353538d14e7aa4e04c85384;hpb=3b52d4a1eb273c6e6eff14223baf69c0a309899c;p=spider.git

diff --git a/src/client.c b/src/client.c
index 3dadfc59..382c852b 100644
--- a/src/client.c
+++ b/src/client.c
@@ -30,6 +30,7 @@
 #include <signal.h>
 #include <string.h>
 #include <termios.h>
+#include <regex.h>
 
 #include "sel.h"
 #include "cmsg.h"
@@ -39,6 +40,14 @@
 #define MSG 2
 #define MAXBUFL 1024
 
+#ifndef MAXPATHLEN 
+#define MAXPATHLEN 256
+#endif
+
+#define DEFPACLEN 128
+#define MAXPACLEN 236
+#define MAXCALLSIGN 9
+
 #define DBUF 1
 #define DMSG 2
 
@@ -48,23 +57,65 @@ typedef struct
 	int sort;					/* the type of connection either text or msg */
 	cmsg_t *in;					/* current input message being built up */
 	cmsg_t *out;				/* current output message being sent */
+	cmsg_t *obuf;				/* current output being buffered */
 	reft *inq;					/* input queue */
 	reft *outq;					/* output queue */
 	sel_t *sp;					/* my select fcb address */
-	int echo;					/* echo characters back to this cnum */
 	struct termios t;			/* any termios associated with this cnum */
+	char echo;					/* echo characters back to this cnum */
+	char t_set;					/* the termios structure is valid */
+	char buffer_it;				/* buffer outgoing packets for paclen */
 } fcb_t;
 
-char *node_addr = "localhost";	/* the node tcp address */
-int node_port = 27754;			/* the tcp port of the node at the above address */
+typedef struct 
+{
+	char *in;
+	regex_t *regex;
+} myregex_t;
+
+
+char *node_addr = "localhost";	/* the node tcp address, can be overridden by DXSPIDER_HOST */
+int node_port = 27754;			/* the tcp port of the node at the above address can be overidden by DXSPIDER_PORT*/
 char *call;						/* the caller's callsign */
 char *connsort;					/* the type of connection */
 fcb_t *in;						/* the fcb of 'stdin' that I shall use */
 fcb_t *node;					/* the fcb of the msg system */
 char nl = '\n';					/* line end character */
+char mode = 1;                  /* 0 - ax25, 1 - normal telnet, 2 - nlonly telnet */
 char ending = 0;				/* set this to end the program */
 char send_Z = 1;				/* set a Z record to the node on termination */
 char echo = 1;					/* echo characters on stdout from stdin */
+char int_tabs = 0;				/* interpret tabs -> spaces */
+char *root = "/spider";         /* root of data tree, can be overridden by DXSPIDER_ROOT  */
+int timeout = 60;				/* default timeout for logins and things */
+int paclen = DEFPACLEN;			/* default buffer size for outgoing packets */
+int tabsize = 8;				/* default tabsize for text messages */
+char *connsort = "local";		/* the connection variety */
+
+
+myregex_t iscallreg[] = {		/* regexes to determine whether this is a reasonable callsign */
+	{
+		"^[A-Z]+[0-9]+[A-Z]+[1-9]?$", 0	               /* G1TLH G1TLH1 */
+	},
+	{
+		"^[0-9]+[A-Z]+[0-9]+[A-Z]+[1-9]?$", 0          /* 2E0AAA 2E0AAA1 */
+	},
+	{
+		"^[A-Z]+[0-9]+[A-Z]+-[1-9]$", 0                /* G1TLH-2 */
+	},
+	{
+		"^[0-9]+[A-Z]+[0-9]+[A-Z]+-[1-9]$", 0          /* 2E0AAA-2 */
+	},
+	{
+		"^[A-Z]+[0-9]+[A-Z]+-1[0-5]$", 0               /* G1TLH-11 */
+	},
+	{
+		"^[0-9]+[A-Z]+[0-9]+[A-Z]+-1[0-5]$", 0         /* 2E0AAA-11 */
+	},
+	{
+		0, 0
+	}
+};
 
 void terminate(int);
 
@@ -78,7 +129,7 @@ void die(char *s, ...)
 	
 	va_list ap;
 	va_start(ap, s);
-	vsprintf(buf, s, ap);
+	vsnprintf(buf, sizeof(buf)-1, s, ap);
 	va_end(ap);
 	fprintf(stderr,"%s\n", buf);
 	terminate(-1);
@@ -111,6 +162,27 @@ int eq(char *a, char *b)
 	return (strcmp(a, b) == 0);
 }
 
+int xopen(char *dir, char *name, int mode)
+{
+	char fn[MAXPATHLEN+1];
+	snprintf(fn, MAXPATHLEN, "%s/%s/%s", root, dir, name);
+	return open(fn, mode);
+}
+
+int iscallsign(char *s)
+{
+	myregex_t *rp;
+
+	if (strlen(s) > MAXCALLSIGN)
+		return 0;
+	
+	for (rp = iscallreg; rp->in; ++rp) {
+		if (regexec(rp->regex, s, 0, 0, 0) == 0)
+			return 1;
+	}
+	return 0;
+}
+
 /*
  * higher level send and receive routines
  */
@@ -128,47 +200,98 @@ fcb_t *fcb_new(int cnum, int sort)
 	return f;
 }
 
+void flush_text(fcb_t *f)
+{
+	if (f->obuf) {
+		cmsg_send(f->outq, f->obuf, 0);
+		f->sp->flags |= SEL_OUTPUT;
+		f->obuf = 0;
+	}
+}
+
 void send_text(fcb_t *f, char *s, int l)
 {
 	cmsg_t *mp;
-	mp = cmsg_new(l+1, f->sort, f);
-	memcpy(mp->inp, s, l);
-	mp->inp += l;
-	*mp->inp++ = nl;
-	cmsg_send(f->outq, mp, 0);
-	f->sp->flags |= SEL_OUTPUT;
+	char *p;
+	
+	if (f->buffer_it && f->obuf) {
+		mp = f->obuf;
+	} else {
+		f->obuf = mp = cmsg_new(paclen+1, f->sort, f);
+	}
+
+	/* remove trailing spaces  */
+	while (l > 0 &&isspace(s[l-1]))
+		--l;
+
+	for (p = s; p < s+l; ) {
+		if (mp->inp >= mp->data + paclen) {
+			flush_text(f);
+			f->obuf = mp = cmsg_new(paclen+1, f->sort, f);
+		}
+		*mp->inp++ = *p++;
+	}
+	if (mp->inp >= mp->data + paclen) {
+		flush_text(f);
+		f->obuf = mp = cmsg_new(paclen+1, f->sort, f);
+	}
+	if (nl == '\r')
+		*mp->inp++ = nl;
+	else {
+		if (mode != 2)
+			*mp->inp++ = '\r';
+		*mp->inp++ = '\n';
+	}
+	if (!f->buffer_it)
+		flush_text(f);
 }
 
-void send_msg(fcb_t *f, char let, char *s, int l)
+void send_msg(fcb_t *f, char let, unsigned char *s, int l)
 {
 	cmsg_t *mp;
 	int ln;
 	int myl = strlen(call)+2+l;
 
-	mp = cmsg_new(myl+4, f->sort, f);
-	ln = htonl(myl);
-	memcpy(mp->inp, &ln, 4);
-	mp->inp += 4;
+	mp = cmsg_new(myl+4+1, f->sort, f);
 	*mp->inp++ = let;
 	strcpy(mp->inp, call);
 	mp->inp += strlen(call);
 	*mp->inp++ = '|';
-	if (l) {
-		memcpy(mp->inp, s, l);
-		mp->inp += l;
-	}
+	if (l > 0) {
+		unsigned char *p;
+		for (p = s; p < s+l; ++p) {
+			if (mp->inp >= mp->data + (myl - 4)) {
+				int off = mp->inp - mp->data;
+				myl += 256;
+				mp = realloc(mp, myl);
+				mp->inp = mp->data + off;
+			}
+			
+			if (*p < 0x20 || *p > 0x7e || *p == '%') {
+				sprintf(mp->inp, "%%%02X", *p & 0xff);
+				mp->inp += strlen(mp->inp);
+			} else 
+				*mp->inp++ = *p;
+		}
+	} 
+	*mp->inp++ = '\n';
 	*mp->inp = 0;
 	cmsg_send(f->outq, mp, 0);
 	f->sp->flags |= SEL_OUTPUT;
 }
 
+/*
+ * the callback (called by sel_run) that handles all the inputs and outputs
+ */
+
 int fcb_handler(sel_t *sp, int in, int out, int err)
 {
 	fcb_t *f = sp->fcb;
 	cmsg_t *mp, *omp;
+	unsigned char c;
 	
 	/* input modes */
-	if (in) {
+	if (ending == 0 && in) {
 		char *p, buf[MAXBUFL];
 		int r;
 
@@ -181,14 +304,16 @@ int fcb_handler(sel_t *sp, int in, int out, int err)
 			case EAGAIN:
 				goto lout;
 			default:
-				if (f->sort == MSG)
-					send_Z = 0;
+/*				if (f->sort == MSG)
+				send_Z = 0; */
+				dbg(DBUF,"got errno %d in input", errno);
 				ending++;
 				return 0;
 			}
 		} else if (r == 0) {
-			if (f->sort == MSG)
-				send_Z = 0;
+/*			if (f->sort == MSG)
+			send_Z = 0; */
+			dbg(DBUF, "ending normally");
 			ending++;
 			return 0;
 		}
@@ -197,14 +322,14 @@ int fcb_handler(sel_t *sp, int in, int out, int err)
 		
 		/* create a new message buffer if required */
 		if (!f->in)
-			f->in = cmsg_new(MAXBUFL, f->sort, f);
+			f->in = cmsg_new(MAXBUFL+1, f->sort, f);
 		mp = f->in;
 
 		switch (f->sort) {
 		case TEXT:
 			p = buf;
 			if (f->echo)
-				omp = cmsg_new(3*r, f->sort, f);
+				omp = cmsg_new(3*r+1, f->sort, f);
 			while (r > 0 && p < &buf[r]) {
 
 				/* echo processing */
@@ -222,23 +347,34 @@ int fcb_handler(sel_t *sp, int in, int out, int err)
 				
 				/* character processing */
 				switch (*p) {
-				case '\b':
+				case '\t':
+					if (int_tabs) {
+						memset(mp->inp, ' ', tabsize);
+						mp->inp += tabsize;
+						++p;
+					} else {
+						*mp->inp++ = *p++;
+					}
+					break;
+				case 0x08:
 				case 0x7f:
 					if (mp->inp > mp->data)
 						mp->inp--;
 					++p;
 					break;
 				default:
-					if (*p == nl) {
+					if (nl == '\n' && *p == '\r') {   /* ignore \r in telnet mode (ugh) */
+						p++;
+					} else if (*p == nl) {
 						if (mp->inp == mp->data)
 							*mp->inp++ = ' ';
 						*mp->inp = 0;              /* zero terminate it, but don't include it in the length */
 						dbgdump(DMSG, "QUEUE TEXT", mp->data, mp->inp-mp->data);
 						cmsg_send(f->inq, mp, 0);
-						f->in = mp = cmsg_new(MAXBUFL, f->sort, f);
+						f->in = mp = cmsg_new(MAXBUFL+1, f->sort, f);
 						++p;
 					} else {
-						if (mp->inp < &mp->data[MAXBUFL])
+						if (mp->inp < &mp->data[MAXBUFL-8])
 							*mp->inp++ = *p++;
 						else {
 							mp->inp = mp->data;
@@ -259,28 +395,60 @@ int fcb_handler(sel_t *sp, int in, int out, int err)
 		case MSG:
 			p = buf;
 			while (r > 0 && p < &buf[r]) {
+				unsigned char ch = *p++;
+				
+				if (mp->inp >= mp->data + (MAXBUFL-1)) {
+					mp->state = 0;
+					mp->inp = mp->data;
+					dbg(DMSG, "Message longer than %d received", MAXBUFL);
+				}
 
-				/* build up the size into the likely message length (yes I know it's a short) */
 				switch (mp->state) {
-				case 0:
-				case 1:
-					mp->state++;
-					break;
-				case 2:
-				case 3:
-					mp->size = (mp->size << 8) | (*p++ & 0xff);
-					mp->state++;
-					break;
-				default:
-					if (mp->inp - mp->data < mp->size) {
-						*mp->inp++ = *p++;
-					} 
-					if (mp->inp - mp->data >= mp->size) {
+				case 0: 
+					if (ch == '%') {
+						c = 0;
+						mp->state = 1;
+					} else if (ch == '\n') {
 						/* kick it upstairs */
+						*mp->inp = 0;
 						dbgdump(DMSG, "QUEUE MSG", mp->data, mp->inp - mp->data);
 						cmsg_send(f->inq, mp, 0);
-						mp = f->in = cmsg_new(MAXBUFL, f->sort, f);
+						mp = f->in = cmsg_new(MAXBUFL+1, f->sort, f);
+					} else if (ch < 0x20 || ch > 0x7e) {
+						dbg(DMSG, "Illegal character (0x%02X) received", *p);
+						mp->inp = mp->data;
+					} else {
+						*mp->inp++ = ch;
+					}
+					break;
+
+				case 1:
+					mp->state = 2;
+					if (ch >= '0' && ch <= '9') 
+						c = (ch - '0') << 4;
+					else if (ch >= 'A' && ch <= 'F')
+						c = (ch - 'A' + 10) << 4;
+					else if (ch >= 'a' && ch <= 'a')
+						c = (ch - 'a' + 10) << 4;
+					else {
+						dbg(DMSG, "Illegal hex char (%c) received in state %d", ch, mp->state);
+						mp->inp = mp->data;
+						mp->state = 0;
+					}
+					break;
+					
+				case 2:
+					if (ch >= '0' && ch <= '9') 
+						*mp->inp++ = c | (ch - '0');
+					else if (ch >= 'A' && ch <= 'F')
+						*mp->inp++ = c | (ch - 'A' + 10);
+					else if (ch >= 'a' && ch <= 'a')
+						*mp->inp++ = c | (ch - 'a' + 10);
+					else {
+						dbg(DMSG, "Illegal hex char (%c) received in state %d", ch, mp->state);
+						mp->inp = mp->data;
 					}
+					mp->state = 0;
 				}
 			}
 			break;
@@ -316,8 +484,9 @@ lout:;
 				case EAGAIN:
 					goto lend;
 				default:
-					if (f->sort == MSG)
-						send_Z = 0;
+/*					if (f->sort == MSG)
+					send_Z = 0; */
+					dbg(DBUF,"got errno %d in output", errno);
 					ending++;
 					return;
 				}
@@ -329,14 +498,35 @@ lout:;
 		if (mp->inp - mp->data >= mp->size) {
 			cmsg_callback(mp, 0);
 			f->out = 0;
-/*			if (is_chain_empty(f->outq))
-			sp->flags &= ~SEL_OUTPUT; */
 		}
 	}
 lend:;
 	return 0;
 }
 
+/* 
+ * set up the various mode flags, NL endings and things
+ */
+void setmode(char *m)
+{
+	connsort = strlower(m);
+	if (eq(connsort, "telnet") || eq(connsort, "local") || eq(connsort, "nlonly")) {
+		nl = '\n';
+		echo = 1;
+		mode = eq(connsort, "nlonly") ? 2 : 1;
+	} else if (eq(connsort, "ax25")) {
+		nl = '\r';
+		echo = 0;
+		mode = 0;
+	} else if (eq(connsort, "connect")) {
+		nl = '\n';
+		echo = 0;
+		mode = 3;
+	} else {
+		die("Connection type must be \"telnet\", \"nlonly\", \"ax25\", \"login\" or \"local\"");
+	}
+}
+
 /*
  * things to do with initialisation
  */
@@ -345,8 +535,21 @@ void initargs(int argc, char *argv[])
 {
 	int i, c, err = 0;
 
-	while ((c = getopt(argc, argv, "x:")) > 0) {
+	while ((c = getopt(argc, argv, "h:p:x:")) > 0) {
 		switch (c) {
+		case 'h':
+			node_addr = optarg;
+			break;
+		case 'l':
+			paclen = atoi(optarg);
+			if (paclen < 80)
+				paclen = 80;
+			if (paclen > MAXPACLEN)
+				paclen = MAXPACLEN;
+			break;
+		case 'p':
+			node_port = atoi(optarg);
+			break;
 		case 'x':
 			dbginit("client");
 			dbgset(atoi(optarg));
@@ -359,33 +562,25 @@ void initargs(int argc, char *argv[])
 
 lerr:
 	if (err) {
-		die("usage: client [-x nn] <call>|login [local|telnet|ax25]");
+		die("usage: client [-x n|-h<host>|-p<port>|-l<paclen>] <call>|login [local|telnet|ax25]");
 	}
 	
 	if (optind < argc) {
 		call = strupper(argv[optind]);
-		if (eq(call, "LOGIN"))
-			die("login not implemented (yet)");
 		++optind;
 	}
 	if (!call)
 		die("Must have at least a callsign (for now)");
 
 	if (optind < argc) {
-		connsort = strlower(argv[optind]);
-		if (eq(connsort, "telnet") || eq(connsort, "local")) {
-			nl = '\n';
-			echo = 1;
-		} else if (eq(connsort, "ax25")) {
-			nl = '\r';
-			echo = 0;
-		} else {
-			die("2nd argument must be \"telnet\" or \"ax25\" or \"local\"");
-		}
+		setmode(argv[optind]);		
 	} else {
-		connsort = "local";
-		nl = '\n';
-		echo = 1;
+		setmode("local");
+	}
+
+	/* this is kludgy, but hey so is the rest of this! */
+	if (mode != 0 && paclen == DEFPACLEN) {
+		paclen = MAXPACLEN;
 	}
 }
 
@@ -423,9 +618,10 @@ void connect_to_node()
 void term_timeout(int i)
 {
 	/* none of this is going to be reused so don't bother cleaning up properly */
-	if (in)
+	if (in && in->t_set)
 		tcsetattr(0, TCSANOW, &in->t);
 	if (node) {
+		shutdown(node->cnum, 3);
 		close(node->cnum);
 	}
 	exit(i);
@@ -433,8 +629,8 @@ void term_timeout(int i)
 
 void terminate(int i)
 {
-	if (send_Z && call) {
-		send_msg(node, 'Z', "", 0);
+	if (node && send_Z && call) {
+		send_msg(node, 'Z', "bye", 3);
 	}
 	
 	signal(SIGALRM, term_timeout);
@@ -444,10 +640,22 @@ void terminate(int i)
 		   (node && !is_chain_empty(node->outq))) {
 		sel_run();
 	}
-	if (in)
-		tcsetattr(0, TCSANOW, &in->t);
-	if (node) 
+	if (in && in->t_set)
+		tcsetattr(0, TCSADRAIN, &in->t);
+	if (node) {
+		shutdown(node->cnum, 3);
 		close(node->cnum);
+	}
+	exit(i);
+}
+
+void login_timeout(int i)
+{
+	write(0, "Timed Out", 10);
+	write(0, &nl, 1);
+	sel_run();					/* force a coordination */
+	if (in && in->t_set)
+		tcsetattr(0, TCSANOW, &in->t);
 	exit(i);
 }
 
@@ -487,17 +695,23 @@ void process_node()
 				if (isdigit(*p))
 					in->echo = *p - '0';
 				break;
+			case 'B':
+				if (isdigit(*p))
+					in->buffer_it = *p - '0';
+				break;
 			case 'D':
 				if (p) {
 					int l = mp->inp - (unsigned char *) p;
 					send_text(in, p, l);
-			}
+				}
 				break;
 			default:
 				break;
 			}
 		}
 		cmsg_callback(mp, 0);
+	} else {
+		flush_text(in);
 	}
 }
 
@@ -507,28 +721,129 @@ void process_node()
 
 main(int argc, char *argv[])
 {
+	/* set up environment */
+	{
+		char *p = getenv("DXSPIDER_ROOT");
+		if (p)
+			root = p;
+		p = getenv("DXSPIDER_HOST");
+		if (p)
+			node_addr = p;
+		p = getenv("DXSPIDER_PORT");
+		if (p)
+			node_port = atoi(p);
+		p = getenv("DXSPIDER_PACLEN");
+		if (p) {
+			paclen = atoi(p);
+			if (paclen < 80)
+				paclen = 80;
+			if (paclen > MAXPACLEN)
+				paclen = MAXPACLEN;
+		}
+	}
+	
+	/* get program arguments, initialise stuff */
 	initargs(argc, argv);
 	sel_init(10, 0, 10000);
 
+	/* trap signals */
 	signal(SIGHUP, SIG_IGN);
-
 	signal(SIGINT, terminate);
 	signal(SIGQUIT, terminate);
 	signal(SIGTERM, terminate);
+#ifdef SIGPWR
 	signal(SIGPWR, terminate);
+#endif
 
-	/* connect up stdin, stdout and message system */
+	/* compile regexes for iscallsign */
+	{
+		myregex_t *rp;
+		for (rp = iscallreg; rp->in; ++rp) {
+			regex_t reg;
+			int r = regcomp(&reg, rp->in, REG_EXTENDED|REG_ICASE|REG_NOSUB);
+			if (r)
+				die("regcomp returned %d for '%s'", r, rp->in);
+			rp->regex = malloc(sizeof(regex_t));
+			if (!rp->regex)
+				die("out of room - compiling regexes");
+			*rp->regex = reg;
+		}
+	}
+	
+	/* is this a login? */
+	if (eq(call, "LOGIN") || eq(call, "login")) {
+	
+		char buf[MAXPACLEN+1];
+		char callsign[MAXCALLSIGN+1];
+		int r, i;
+		int f = xopen("data", "issue", 0);
+		if (f > 0) {
+			while ((r = read(f, buf, paclen)) > 0) {
+				if (nl != '\n') {
+					char *p;
+					for (p = buf; p < &buf[r]; ++p) {
+						if (*p == '\n')
+							*p = nl;
+					}
+				}
+				write(0, buf, r);
+			}
+			close(f);
+		}
+		signal(SIGALRM, login_timeout);
+		alarm(timeout);
+		write(0, "login: ", 7);
+		dbgdump(DBUF, "<-out", "login: ", 7);
+		for (i = 0;;) {
+			char *p;
+		    r = read(0, buf, 20);
+			dbgdump(DBUF, "in ->", buf, r);
+			if (r <= 0)
+				die("No login or error (%d)", errno);
+			write(0, buf, r);
+			dbgdump(DBUF, "<-out", buf, r);
+			for (p = buf; p < buf+r; ++p) {
+				if (i < MAXCALLSIGN) {
+					if (*p == '\r' || *p == '\n')
+						goto lgotcall;
+					else if (isalnum(*p) || *p == '-')
+						callsign[i++] = *p;
+					else
+						die("%c is not a valid callsign character", *p);
+				} else 
+					die("callsign entered is too long");
+			}
+		}
+lgotcall:
+		signal(SIGALRM, SIG_IGN);
+		alarm(0);
+		callsign[i]= 0;
+		call = strupper(callsign);
+	}
+
+	/* check the callsign */
+	if (!iscallsign(call)) {
+		die("Sorry, %s isn't a valid callsign", call);
+	}
+	
+	/* connect up stdin */
 	in = fcb_new(0, TEXT);
 	in->sp = sel_open(0, in, "STDIN", fcb_handler, TEXT, SEL_INPUT);
-	if (tcgetattr(0, &in->t) < 0) 
-		die("tcgetattr (%d)", errno);
-	{
+	if (tcgetattr(0, &in->t) < 0) {
+/*		echo = 0; */
+		in->echo = echo;
+		in->t_set = 0;
+	} else {
 		struct termios t = in->t;
 		t.c_lflag &= ~(ECHO|ECHONL|ICANON);
 		if (tcsetattr(0, TCSANOW, &t) < 0) 
 			die("tcsetattr (%d)", errno);
 		in->echo = echo;
+		in->t_set = 1;
 	}
+	in->buffer_it = 1;
+
+	/* connect up node */
 	connect_to_node();
 
 	/* tell the cluster who I am */