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-rw-r--r--ax25ipd/process.c192
1 files changed, 105 insertions, 87 deletions
diff --git a/ax25ipd/process.c b/ax25ipd/process.c
index fdf08ad..5767129 100644
--- a/ax25ipd/process.c
+++ b/ax25ipd/process.c
@@ -29,17 +29,16 @@
#define SETREPEATED(p) (*(p+6))|=0x80
#define SETLAST(p) (*(p+6))|=0x01
-unsigned char bcbuf[256]; /* Must be larger than bc_text!!! */
-int bclen; /* The size of bcbuf */
+unsigned char bcbuf[256]; /* Must be larger than bc_text!!! */
+int bclen; /* The size of bcbuf */
/*
* Initialize the process variables
*/
-void
-process_init()
+void process_init()
{
- bclen = -1; /* flag that we need to rebuild the bctext */
+ bclen = -1; /* flag that we need to rebuild the bctext */
}
/*
@@ -65,62 +64,66 @@ process_init()
* the IP interface.
*/
-void
-from_kiss(buf, l)
+void from_kiss(buf, l)
unsigned char *buf;
int l;
{
unsigned char *a, *ipaddr;
- if (l<15) {
+ if (l < 15) {
LOGL2("from_kiss: dumped - length wrong!\n");
stats.kiss_tooshort++;
return;
}
- if (loglevel>2)
+ if (loglevel > 2)
dump_ax25frame("from_kiss: ", buf, l);
- if(digi) { /* if we are in digi mode */
+ if (digi) { /* if we are in digi mode */
a = next_addr(buf);
- if(NOT_ME(a)){
+ if (NOT_ME(a)) {
stats.kiss_not_for_me++;
LOGL4("from_kiss: (digi) dumped - not for me\n");
return;
}
- if (a==buf) { /* must be a digi */
+ if (a == buf) { /* must be a digi */
stats.kiss_i_am_dest++;
- LOGL2("from_kiss: (digi) dumped - I am destination!\n");
+ LOGL2
+ ("from_kiss: (digi) dumped - I am destination!\n");
return;
}
SETREPEATED(a);
a = next_addr(buf); /* find who gets it after us */
- } else { /* must be tnc mode */
+ } else { /* must be tnc mode */
a = next_addr(buf);
#ifdef TNC_FILTER
if (IS_ME(a)) {
- LOGL2("from_kiss: (tnc) dumped - addressed to self!\n");
+ LOGL2
+ ("from_kiss: (tnc) dumped - addressed to self!\n");
return;
}
#endif
- } /* end of tnc mode */
+ } /* end of tnc mode */
/* Lookup the IP address for this route */
ipaddr = call_to_ip(a);
- if (ipaddr==NULL) {
+ if (ipaddr == NULL) {
if (is_call_bcast(a)) {
/* Warning - assuming buffer has room for 2 bytes */
- add_crc(buf, l); l+=2;
+ add_crc(buf, l);
+ l += 2;
send_broadcast(buf, l);
} else {
stats.kiss_no_ip_addr++;
- LOGL2("from_kiss: dumped - cannot figure out where to send this!\n");
+ LOGL2
+ ("from_kiss: dumped - cannot figure out where to send this!\n");
}
return;
} else {
/* Warning - assuming buffer has room for 2 bytes */
- add_crc(buf, l); l+=2;
+ add_crc(buf, l);
+ l += 2;
send_ip(buf, l, ipaddr);
if (is_call_bcast(a)) {
send_broadcast(buf, l);
@@ -144,54 +147,56 @@ int l;
* We simply send the packet to the KISS send routine.
*/
-void
-from_ip(buf, l)
+void from_ip(buf, l)
unsigned char *buf;
int l;
{
int port = 0;
unsigned char *a;
- if(!ok_crc(buf, l)){
+ if (!ok_crc(buf, l)) {
stats.ip_failed_crc++;
LOGL2("from_ip: dumped - CRC incorrect!\n");
return;
}
- l = l - 2; /* dump the blasted CRC */
+ l = l - 2; /* dump the blasted CRC */
- if(l<15){
+ if (l < 15) {
stats.ip_tooshort++;
LOGL2("from_ip: dumped - length wrong!\n");
return;
}
- if(loglevel>2)dump_ax25frame("from_ip: ", buf, l);
+ if (loglevel > 2)
+ dump_ax25frame("from_ip: ", buf, l);
- if(digi){ /* if we are in digi mode */
+ if (digi) { /* if we are in digi mode */
a = next_addr(buf);
- if(NOT_ME(a)){
+ if (NOT_ME(a)) {
stats.ip_not_for_me++;
LOGL2("from_ip: (digi) dumped - not for me!\n");
return;
}
- if(a==buf){ /* must be a digi */
+ if (a == buf) { /* must be a digi */
stats.ip_i_am_dest++;
- LOGL2("from_ip: (digi) dumped - I am destination!\n");
+ LOGL2
+ ("from_ip: (digi) dumped - I am destination!\n");
return;
}
- if(dual_port == 1 && FOR_PORT2(a)){
+ if (dual_port == 1 && FOR_PORT2(a)) {
port = 0x10;
}
SETREPEATED(a);
- } else { /* must be tnc mode */
+ } else { /* must be tnc mode */
a = next_addr(buf);
#ifdef TNC_FILTER
- if(NOT_ME(a)){
- LOGL2("from_ip: (tnc) dumped - I am not destination!\n");
+ if (NOT_ME(a)) {
+ LOGL2
+ ("from_ip: (tnc) dumped - I am not destination!\n");
return;
}
#endif
- } /* end of tnc mode */
+ } /* end of tnc mode */
send_kiss(port, buf, l);
}
@@ -199,38 +204,40 @@ int l;
* Send an ID frame out the KISS port.
*/
-void
-do_beacon()
+void do_beacon()
{
int i;
unsigned char *p;
- if(bclen == 0) return; /* nothing to do! */
+ if (bclen == 0)
+ return; /* nothing to do! */
- if(bclen < 0) { /* build the id string */
+ if (bclen < 0) { /* build the id string */
p = bcbuf;
- *p++ = ('I'<<1);
- *p++ = ('D'<<1);
- *p++ = (' '<<1);
- *p++ = (' '<<1);
- *p++ = (' '<<1);
- *p++ = (' '<<1);
- *p++ = '\0' | 0x60; /* SSID, set reserved bits */
+ *p++ = ('I' << 1);
+ *p++ = ('D' << 1);
+ *p++ = (' ' << 1);
+ *p++ = (' ' << 1);
+ *p++ = (' ' << 1);
+ *p++ = (' ' << 1);
+ *p++ = '\0' | 0x60; /* SSID, set reserved bits */
- for(i=0;i<6;i++)*p++=mycallsign[i];
- *p++ = mycallsign[6] | 0x60; /* ensure reserved bits are set */
- SETLAST(bcbuf+7); /* Set the E bit -- last address */
+ for (i = 0; i < 6; i++)
+ *p++ = mycallsign[i];
+ *p++ = mycallsign[6] | 0x60; /* ensure reserved bits are set */
+ SETLAST(bcbuf + 7); /* Set the E bit -- last address */
- *p++ = 0x03; /* Control field -- UI frame */
+ *p++ = 0x03; /* Control field -- UI frame */
- *p++ = 0xf0; /* Protocol ID -- 0xf0 is no protocol */
+ *p++ = 0xf0; /* Protocol ID -- 0xf0 is no protocol */
- strcpy(p, bc_text); /* add the text field */
+ strcpy(p, bc_text); /* add the text field */
- bclen = 16 + strlen(bc_text); /* adjust the length nicely */
+ bclen = 16 + strlen(bc_text); /* adjust the length nicely */
}
- if(loglevel>2)dump_ax25frame("do_beacon: ", bcbuf, bclen);
+ if (loglevel > 2)
+ dump_ax25frame("do_beacon: ", bcbuf, bclen);
stats.kiss_beacon_outs++;
send_kiss(0, bcbuf, bclen);
}
@@ -239,20 +246,28 @@ do_beacon()
* return true if the addresses supplied match
* modified for wildcarding by vk5xxx
*/
-int
-addrmatch(a,b)
+int addrmatch(a, b)
unsigned char *a, *b;
{
- if((*a=='\0') || (*b=='\0'))return 0;
-
- if((*a++^*b++)&0xfe)return 0; /* "K" */
- if((*a++^*b++)&0xfe)return 0; /* "A" */
- if((*a++^*b++)&0xfe)return 0; /* "9" */
- if((*a++^*b++)&0xfe)return 0; /* "W" */
- if((*a++^*b++)&0xfe)return 0; /* "S" */
- if((*a++^*b++)&0xfe)return 0; /* "B" */
- if(((*b++)&0x1e)==0)return 1; /* ssid 0 matches all ssid's */
- if((*a++^*b)&0x1e)return 0; /* ssid */
+ if ((*a == '\0') || (*b == '\0'))
+ return 0;
+
+ if ((*a++ ^ *b++) & 0xfe)
+ return 0; /* "K" */
+ if ((*a++ ^ *b++) & 0xfe)
+ return 0; /* "A" */
+ if ((*a++ ^ *b++) & 0xfe)
+ return 0; /* "9" */
+ if ((*a++ ^ *b++) & 0xfe)
+ return 0; /* "W" */
+ if ((*a++ ^ *b++) & 0xfe)
+ return 0; /* "S" */
+ if ((*a++ ^ *b++) & 0xfe)
+ return 0; /* "B" */
+ if (((*b++) & 0x1e) == 0)
+ return 1; /* ssid 0 matches all ssid's */
+ if ((*a++ ^ *b) & 0x1e)
+ return 0; /* ssid */
/* if((*a++^*b++)&0x1e)return 0; ssid (how it was ...) */
return 1;
}
@@ -260,47 +275,47 @@ unsigned char *a, *b;
/*
* return pointer to the next station to get this packet
*/
-unsigned char *
-next_addr(f)
+unsigned char *next_addr(f)
unsigned char *f;
{
unsigned char *a;
/* If no digis, return the destination address */
- if(NO_DIGIS(f))return f;
+ if (NO_DIGIS(f))
+ return f;
/* check each digi field. The first one that hasn't seen it is the one */
a = f + 7;
do {
a += 7;
- if(NOTREPEATED(a))return a;
- }while(NOT_LAST(a));
+ if (NOTREPEATED(a))
+ return a;
+ }
+ while (NOT_LAST(a));
/* all the digis have seen it. return the destination address */
- return f;
+ return f;
}
/*
* tack on the CRC for the frame. Note we assume the buffer is long
* enough to have the two bytes tacked on.
*/
-void
-add_crc(buf, l)
+void add_crc(buf, l)
unsigned char *buf;
int l;
{
unsigned short int u;
u = compute_crc(buf, l);
- buf[l] = u&0xff; /* lsb first */
- buf[l+1] = (u>>8)&0xff; /* msb next */
+ buf[l] = u & 0xff; /* lsb first */
+ buf[l + 1] = (u >> 8) & 0xff; /* msb next */
}
/*
* Dump AX25 frame.
*/
-void
-dump_ax25frame(t, buf, l)
+void dump_ax25frame(t, buf, l)
unsigned char *buf;
char *t;
int l;
@@ -312,28 +327,31 @@ int l;
printf("%s AX25: (l=%3d) ", t, l);
- if(l<15){
+ if (l < 15) {
printf("Bogus size...\n");
return;
}
- printf("%s -> ", call_to_a(buf+7));
+ printf("%s -> ", call_to_a(buf + 7));
printf("%s", call_to_a(buf));
- if(ARE_DIGIS(buf)){
+ if (ARE_DIGIS(buf)) {
printf(" v");
- a = buf+7;
- do{
- a+=7;
+ a = buf + 7;
+ do {
+ a += 7;
printf(" %s", call_to_a(a));
- if(REPEATED(a))printf("*");
- }while(NOT_LAST(a));
+ if (REPEATED(a))
+ printf("*");
+ }
+ while (NOT_LAST(a));
}
printf("\n");
#ifdef DEBUG
- for(i=0;i<l;i++)printf("%02x ",buf[i]);
+ for (i = 0; i < l; i++)
+ printf("%02x ", buf[i]);
printf("\n");
#endif
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