#include <errno.h>
#include <signal.h>
#include <string.h>
+#include <termios.h>
+#include <regex.h>
#include "sel.h"
#include "cmsg.h"
+#include "debug.h"
#define TEXT 1
#define MSG 2
#define MAXBUFL 1024
+#ifndef MAXPATHLEN
+#define MAXPATHLEN 256
+#endif
+
+#define DEFPACLEN 128
+#define MAXPACLEN 236
+
+#define DBUF 1
+#define DMSG 2
+
typedef struct
{
int cnum; /* the connection number */
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 */
+ 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 *out; /* the fcb of 'stdout' that I shall use */
fcb_t *node; /* the fcb of the msg system */
char nl = '\n'; /* line end character */
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 */
+
+myregex_t iscallreg[] = { /* regexes to determine whether this is a reasonable callsign */
+ {
+ "^[A-Z]+[0-9]+[A-Z]+[1-9]?$", 0
+ },
+ {
+ "^[0-9]+[A-Z]+[0-9]+[A-Z]+[1-9]?$", 0
+ },
+ {
+ "^[A-Z]+[0-9]+[A-Z]+[1-9]?-[1-9]$", 0
+ },
+ {
+ "^[0-9]+[A-Z]+[0-9]+[A-Z]+[1-9]?-[1-9]$", 0
+ },
+ {
+ "^[A-Z]+[0-9]+[A-Z]+[1-9]?-1[0-5]$", 0
+ },
+ {
+ "^[0-9]+[A-Z]+[0-9]+[A-Z]+[1-9]?-1[0-5]$", 0
+ },
+ {
+ 0, 0
+ }
+};
+
+void terminate(int);
/*
* utility routines - various
va_list ap;
va_start(ap, s);
- vsprintf(buf, s, ap);
+ vsnprintf(buf, sizeof(buf)-1, s, ap);
va_end(ap);
- fprintf(stderr, buf);
- exit(-1);
+ fprintf(stderr,"%s\n", buf);
+ terminate(-1);
}
char *strupper(char *s)
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;
+ 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
*/
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;
+ char *p;
+
+ if (f->buffer_it && f->obuf) {
+ mp = f->obuf;
+ } else {
+ f->obuf = mp = cmsg_new(paclen+1, f->sort, f);
+ }
+
+ /* ignore 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);
+ }
*mp->inp++ = nl;
- cmsg_send(f->outq, mp, 0);
- f->sp->flags |= SEL_OUTPUT;
+ if (!f->buffer_it)
+ flush_text(f);
}
void send_msg(fcb_t *f, char let, char *s, int l)
int ln;
int myl = strlen(call)+2+l;
- mp = cmsg_new(myl+4, f->sort, f);
+ mp = cmsg_new(myl+4+1, f->sort, f);
ln = htonl(myl);
memcpy(mp->inp, &ln, 4);
mp->inp += 4;
strcpy(mp->inp, call);
mp->inp += strlen(call);
*mp->inp++ = '|';
- if (l) {
+ if (l > 0) {
memcpy(mp->inp, s, l);
mp->inp += l;
}
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;
+ cmsg_t *mp, *omp;
/* input modes */
if (in) {
return 0;
}
+ dbgdump(DBUF, "in ->", buf, r);
+
/* create a new message buffer if required */
if (!f->in)
- f->in = cmsg_new(MAXBUFL, sp->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+1, f->sort, f);
while (r > 0 && p < &buf[r]) {
+
+ /* echo processing */
+ if (f->echo) {
+ switch (*p) {
+ case '\b':
+ case 0x7f:
+ strcpy(omp->inp, "\b \b");
+ omp->inp += strlen(omp->inp);
+ break;
+ default:
+ *omp->inp++ = *p;
+ }
+ }
- /*
- * if we have a nl then send the message upstairs
- * start a new message
- */
-
- if (*p == nl) {
- if (mp->inp == mp->data)
- *mp->inp++ = ' ';
- *mp->inp = 0; /* zero terminate it, but don't include it in the length */
- cmsg_send(f->inq, mp, 0);
- f->in = mp = cmsg_new(MAXBUFL, sp->sort, f);
- ++p;
- } else {
- if (mp->inp < &mp->data[MAXBUFL])
+ /* character processing */
+ switch (*p) {
+ case '\t':
+ if (int_tabs) {
+ memset(mp->inp, ' ', tabsize);
+ mp->inp += tabsize;
+ ++p;
+ } else {
*mp->inp++ = *p++;
- else {
- mp->inp = mp->data;
+ }
+ break;
+ case '\b':
+ case 0x7f:
+ if (mp->inp > mp->data)
+ mp->inp--;
+ ++p;
+ break;
+ default:
+ 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+1, f->sort, f);
+ ++p;
+ } else {
+ if (mp->inp < &mp->data[MAXBUFL-8])
+ *mp->inp++ = *p++;
+ else {
+ mp->inp = mp->data;
+ }
}
}
}
+
+ /* queue any echo text */
+ if (f->echo) {
+ dbgdump(DMSG, "QUEUE ECHO TEXT", omp->data, omp->inp - omp->data);
+ cmsg_send(f->outq, omp, 0);
+ f->sp->flags |= SEL_OUTPUT;
+ }
+
break;
case MSG:
switch (mp->state) {
case 0:
case 1:
+ mp->state++;
+ break;
case 2:
case 3:
- mp->size = (mp->size << 8) | *p++;
+ mp->size = (mp->size << 8) | (*p++ & 0xff);
+ if (mp->size > MAXBUFL)
+ die("Message size too big from node (%d > %d)", mp->size, MAXBUFL);
mp->state++;
break;
default:
if (mp->inp - mp->data < mp->size) {
*mp->inp++ = *p++;
- } else {
+ }
+ if (mp->inp - mp->data >= mp->size) {
/* kick it upstairs */
+ 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);
}
}
}
}
l = mp->size - (mp->inp - mp->data);
if (l > 0) {
+
+ dbgdump(DBUF, "<-out", mp->inp, l);
+
r = write(f->cnum, mp->inp, l);
if (r < 0) {
switch (errno) {
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:;
void initargs(int argc, char *argv[])
{
- int i;
- if (argc >= 2) {
- call = strupper(argv[1]);
- if (eq(call, "LOGIN"))
- die("login not implemented (yet)");
+ int i, c, err = 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));
+ break;
+ default:
+ ++err;
+ goto lerr;
+ }
+ }
+
+lerr:
+ if (err) {
+ die("usage: client [-x n|-h<host>|-p<port>|-l<paclen>] <call>|login [local|telnet|ax25]");
+ }
+
+ if (optind < argc) {
+ call = strupper(argv[optind]);
+ ++optind;
}
if (!call)
die("Must have at least a callsign (for now)");
- if (argc >= 3) {
- connsort = strlower(argv[2]);
+ 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\"");
}
} else {
connsort = "local";
+ nl = '\n';
+ echo = 1;
+ }
+
+ /* this is kludgy, but hey so is the rest of this! */
+ if (!eq(connsort, "ax25") && paclen == DEFPACLEN) {
+ paclen = MAXPACLEN;
}
}
void term_timeout(int i)
{
/* none of this is going to be reused so don't bother cleaning up properly */
- if (out)
- out = 0;
+ if (in && in->t_set)
+ tcsetattr(0, TCSANOW, &in->t);
if (node) {
close(node->cnum);
- node = 0;
}
exit(i);
}
void terminate(int i)
{
- if (send_Z && call) {
+ if (node && send_Z && call) {
send_msg(node, 'Z', "", 0);
}
signal(SIGALRM, term_timeout);
alarm(10);
- while ((out && !is_chain_empty(out->outq)) ||
+ while ((in && !is_chain_empty(in->outq)) ||
(node && !is_chain_empty(node->outq))) {
sel_run();
}
+ if (in && in->t_set)
+ tcsetattr(0, TCSADRAIN, &in->t);
if (node)
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);
+}
+
/*
* things to do with ongoing processing of inputs
*/
{
cmsg_t *mp = cmsg_next(in->inq);
if (mp) {
- send_msg(node, 'I', mp->data, mp->size);
+ dbg(DMSG, "MSG size: %d", mp->size);
+
+ if (mp->size > 0 && mp->inp > mp->data) {
+ send_msg(node, 'I', mp->data, mp->size);
+ }
cmsg_callback(mp, 0);
}
}
{
cmsg_t *mp = cmsg_next(node->inq);
if (mp) {
- char *p = strchr(mp->data, '|');
- if (p)
- p++;
- switch (mp->data[0]) {
- case 'Z':
- send_Z = 0;
- ending++;
- return;
- case 'D':
- if (p) {
- int l = mp->inp - (unsigned char *) p;
- send_text(out, p, l);
+ dbg(DMSG, "MSG size: %d", mp->size);
+
+ if (mp->size > 0 && mp->inp > mp->data) {
+ char *p = strchr(mp->data, '|');
+ if (p)
+ p++;
+ switch (mp->data[0]) {
+ case 'Z':
+ send_Z = 0;
+ ending++;
+ return;
+ case 'E':
+ 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;
}
- break;
- default:
- break;
- }
+ }
cmsg_callback(mp, 0);
+ } else {
+ flush_text(in);
}
- if (is_chain_empty(out->outq))
- fsync(out->cnum);
}
/*
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
+
+ /* compile regexes for iscallsign */
+ {
+ myregex_t *rp;
+ for (rp = iscallreg; rp->in; ++rp) {
+ regex_t reg;
+ int r = regcomp(®, 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")) {
+ char buf[MAXPACLEN+1];
+ int r;
+ 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);
+ r = read(0, buf, 20);
+ if (r <= 0)
+ die("No login or error (%d)", errno);
+ signal(SIGALRM, SIG_IGN);
+ alarm(0);
+ while (r > 0) {
+ if (buf[r-1] == ' ' || buf[r-1] == '\r' || buf[r-1] == '\n')
+ --r;
+ else
+ break;
+ }
+ buf[r] = 0;
+ call = strupper(buf);
+ }
- /* connect up stdin, stdout and message system */
+ /* 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);
- out = fcb_new(1, TEXT);
- out->sp = sel_open(1, out, "STDOUT", fcb_handler, TEXT, 0);
+ if (tcgetattr(0, &in->t) < 0) {
+ echo = 0;
+ 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 */
+
projects / spider.git / blobdiff