void rip_incoming(ssize_t n)
/* Use a RIP packet to add to the router table. (RIP packets are really for
* between routers, but often it is the only information around.)
*/
{
udp_io_hdr_t *udp_io_hdr;
u32_t default_dist;
i32_t pref;
routeinfo_t *routeinfo;
struct routedata *data, *end;
/* We don't care about RIP packets when there are router adverts. */
if (now + MaxAdvertisementInterval < router_advert_valid) return;
udp_io_hdr= (udp_io_hdr_t *) rip_buf;
if (udp_io_hdr->uih_data_len != n - sizeof(*udp_io_hdr)) {
if (debug) printf("Bad sized route packet (discarded)\n");
return;
}
routeinfo= (routeinfo_t *) (rip_buf + sizeof(*udp_io_hdr)
+ udp_io_hdr->uih_ip_opt_len);
if (routeinfo->command != RIP_REPLY) {
if (debug) {
printf("RIP-%d packet command %d ignored\n",
routeinfo->version, routeinfo->command);
}
return;
}
/* Look for a default route, the route to the gateway. */
end= (struct routedata *) (rip_buf + n);
default_dist= (u32_t) -1;
for (data= routeinfo->data; data < end; data++) {
if (ntohs(data->family) != AF_INET || data->ip_addr != 0)
continue;
default_dist= ntohl(data->metric);
if (default_dist >= 256) {
if (debug) {
printf("Strange metric %lu\n",
(unsigned long) default_dist);
}
}
}
pref= default_dist >= 256 ? 1 : 512 - default_dist;
pref+= priority_offset;
/* Add the gateway to the table with the calculated preference. */
add_gateway(udp_io_hdr->uih_src_addr, pref);
if (debug) {
printf("Routing table after RIP-%d packet from %s:\n",
routeinfo->version,
addr2name(udp_io_hdr->uih_src_addr));
print_table();
}
/* Start advertizing. */
if (next_advert == NEVER) next_advert= IMMEDIATELY;
}
/* ------------------------------------------------------------- **
** Sets up the control connection to the server and initialises
** session info.
** ------------------------------------------------------------- */
void init_session(int fd, struct sockaddr_in source)
{
info = init_info(fd, source);
write_log(INFO, "Connect from %s",
sstr_buf(addr2name(info->client_control.address.sin_addr)));
/*FIXME have a login function which deals with ntp and cache */
ccp_changedest();
ntp_changedest();
info->final_server_address = info->server_control.address;
write_log(INFO, "... to %s(%s)",
inet_ntoa(info->final_server_address.sin_addr),
sstr_buf(info->server_name));
#ifdef ENABLE_CHANGEPROC
set_proc_title("frox: %s <-> %s",
inet_ntoa(info->client_control.address.sin_addr),
inet_ntoa(info->final_server_address.sin_addr));
#endif
connect_to_server();
ntp_senduser();
run_proxy();
}
void
__cyg_profile_func_enter (void *func, void *caller) {
if(profiled_func == NULL) {
sprintf(buffer, "%p", func);
addr2name(buffer);
buffer[strlen(buffer)-1] = '\0';
if(strcmp(buffer, target_function) == 0) {
profiled_func = func;
} else {
return;
}
}
if(profiled_func == func) {
out = malloc(sizeof(struct data));
out->func = profiled_func;
out->caller = caller;
gettimeofday( ¤t_time, NULL);
out->sec = current_time.tv_sec;
out->usec = current_time.tv_usec;
out->state = 0;
out->next = NULL;
if(start == NULL) {
start = out;
last = out;
} else {
last->next = out;
last = out;
}
}
}
void advertize(ipaddr_t host)
/* Send a router advert to a host. */
{
char *buf, *data;
ip_hdr_t *ip_hdr;
icmp_hdr_t *icmp_hdr;
int i;
table_t *ptab;
buf= malloc(sizeof(*ip_hdr) + offsetof(icmp_hdr_t, ih_dun.uhd_data)
+ table_size * (sizeof(ipaddr_t) + sizeof(u32_t)));
if (buf == nil) fatal("heap error");
ip_hdr= (ip_hdr_t *) buf;
icmp_hdr= (icmp_hdr_t *) (ip_hdr + 1);
ip_hdr->ih_vers_ihl= 0x45;
ip_hdr->ih_dst= host;
icmp_hdr->ih_type= ICMP_TYPE_ROUTER_ADVER;
icmp_hdr->ih_code= 0;
icmp_hdr->ih_hun.ihh_ram.iram_na= 0;
icmp_hdr->ih_hun.ihh_ram.iram_aes= 2;
icmp_hdr->ih_hun.ihh_ram.iram_lt= htons(AdvertisementLifetime);
data= (char *) icmp_hdr->ih_dun.uhd_data;
/* Collect gateway entries from the table. */
for (i= 0, ptab= table; i < table_size; i++, ptab++) {
if (ptab->tab_time < now - DEAD_TO) continue;
icmp_hdr->ih_hun.ihh_ram.iram_na++;
if (ptab->tab_time < now - DEST_TO) ptab->tab_pref= DEAD_PREF;
* (ipaddr_t *) data= ptab->tab_gw;
data+= sizeof(ipaddr_t);
* (i32_t *) data= htonl(ptab->tab_pref);
data+= sizeof(i32_t);
}
icmp_hdr->ih_chksum= 0;
icmp_hdr->ih_chksum= ~oneC_sum(0, icmp_hdr, data - (char *) icmp_hdr);
if (icmp_hdr->ih_hun.ihh_ram.iram_na > 0) {
/* Send routing info. */
if (debug) {
printf("Routing table send to %s:\n", addr2name(host));
print_table();
}
if (write(irdp_fd, buf, data - buf) < 0) {
(errno == EIO ? fatal : report)(ip_device);
}
}
free(buf);
}
/*
* u_accept
* Wait for a connection request from a host on a specified port.
*
* parameters:
* fd = file descriptor previously bound to listening port
* hostn = a buffer that will hold the name of the remote host
* hostnsize = size of hostn buffer
* returns: a communication file descriptor on success
* hostn is filled with the name of the remote host.
* -1 on error with errno set
*
* comments: This function is used by the server to wait for a
* communication. It blocks until a remote request is received
* from the port bound to the given file descriptor.
* hostn is filled with an ASCII string containing the remote
* host name. It must point to a buffer of size at least hostnsize.
* If the name does not fit, as much of the name as is possible is put
* into the buffer.
* If hostn is NULL or hostnsize <= 0, no hostname is copied.
*/
int u_accept(int fd, char *hostn, int hostnsize) {
int len = sizeof(struct sockaddr);
struct sockaddr_in netclient;
int retval;
while (((retval =
accept(fd, (struct sockaddr *)(&netclient), &len)) == -1) &&
(errno == EINTR))
;
if ((retval == -1) || (hostn == NULL) || (hostnsize <= 0))
return retval;
addr2name(netclient.sin_addr, hostn, hostnsize);
return retval;
}
void print_table(void)
/* Show the collected routing table. */
{
int i;
table_t *ptab;
struct tm *tm;
for (i= 0, ptab= table; i < table_size; i++, ptab++) {
if (ptab->tab_time < now - DEAD_TO) continue;
tm= localtime(&ptab->tab_time);
printf("%-40s %6ld %02d:%02d:%02d\n",
addr2name(ptab->tab_gw),
(long) ptab->tab_pref,
tm->tm_hour, tm->tm_min, tm->tm_sec);
}
}
void __attribute__((optimize("O0"))) panic(char* error, ...) {
if(unlikely(!spinlock_get(&lock, 30))) {
freeze();
}
va_list va;
va_start(va, error);
interrupts_disable();
panic_printf("\nKernel Panic: ");
vprintf(error, va);
serial_vprintf(error, va);
panic_printf("\n");
va_end(va);
panic_printf("Last PIT tick: %d (rate %d, uptime: %d seconds)\n",
(uint32_t)timer_tick, timer_rate, uptime());
task_t* task = scheduler_get_current();
if(task) {
panic_printf("Running task: %d <%s>", task->pid, task->name);
/* uint32_t task_offset = task->state->eip - task->entry;
if(task_offset >= 0) {
panic_printf("+%x at 0x%x", task_offset, task->state->eip);
}
*/
panic_printf("\n");
} else {
panic_printf("Running task: [No task running]\n");
}
panic_printf("Paging context: %s\n\n", vmem_get_name(vmem_currentContext));
panic_printf("Call trace:\n");
intptr_t addresses[10];
int read = walk_stack(addresses, 10);
for(int i = 0; i < read; i++) {
panic_printf("#%-6d %s <%#x>\n", i, addr2name(addresses[i]), addresses[i]);
}
freeze();
}
/* Print the symbol address => name resolution table in $TRACY_ASYNC mode. */
static void resolve_backlog(void)
{
void *addr;
/* A lot of entries will be duplicate but nevermind. */
LOGIT("SYMTAB:");
lseek(Async_fd, SEEK_SET, 0);
while (read(Async_fd, &addr, sizeof(addr)) == sizeof(addr))
{
char const *fname, *funame;
switch (addr2name(&fname, &funame, addr))
{
case 1:
LOGIT("%p = %s:%s()", addr, fname, funame);
break;
case 0:
LOGIT("%p = %s:[%p]", addr, fname, addr);
break;
}
}
close(Async_fd);
}
void irdp_incoming(ssize_t n)
/* Look for router solicitations and router advertisements. The solicitations
* are probably from other irdpd daemons, we answer them if we do not expect
* a real router to answer. The advertisements cause this daemon to shut up.
*/
{
ip_hdr_t *ip_hdr;
icmp_hdr_t *icmp_hdr;
int ip_hdr_len;
char *data;
int i;
int router;
ipaddr_t addr;
i32_t pref;
time_t valid;
ip_hdr= (ip_hdr_t *) irdp_buf;
ip_hdr_len= (ip_hdr->ih_vers_ihl & IH_IHL_MASK) << 2;
if (n < ip_hdr_len + 8) {
if (debug) printf("Bad sized ICMP (discarded)\n");
return;
}
icmp_hdr= (icmp_hdr_t *)(irdp_buf + ip_hdr_len);
/* Did I send this myself? */
if (ip_hdr->ih_src == ip_hdr->ih_dst) return;
if ((htonl(ip_hdr->ih_src) & 0xFF000000L) == 0x7F000000L) return;
if (icmp_hdr->ih_type != ICMP_TYPE_ROUTER_ADVER) return;
/* Incoming router advertisement, the kind of packet the TCP/IP task
* is very happy with. No need to solicit further.
*/
sol_retries= 0;
/* Add router info to our table. Also see if the packet really came
* from a router. If so then we can go dormant for the lifetime of
* the ICMP.
*/
router= 0;
data= (char *) icmp_hdr->ih_dun.uhd_data;
for (i= 0; i < icmp_hdr->ih_hun.ihh_ram.iram_na; i++) {
addr= * (ipaddr_t *) data;
data+= sizeof(ipaddr_t);
pref= htonl(* (i32_t *) data);
data+= sizeof(i32_t);
if (addr == ip_hdr->ih_src) {
/* The sender is in the routing table! */
router= 1;
}
add_gateway(addr, pref);
}
valid= now + ntohs(icmp_hdr->ih_hun.ihh_ram.iram_lt);
if (router) router_advert_valid= valid;
/* Restart advertizing close to the timeout of the advert. (No more
* irdpd adverts if the router stays alive.)
*/
if (router || next_advert > valid - DANGER)
next_advert= valid - DANGER;
if (debug) {
printf("Routing table after advert received from %s:\n",
addr2name(ip_hdr->ih_src));
print_table();
if (router) {
struct tm *tm= localtime(&router_advert_valid);
printf(
"This router advert is valid until %02d:%02d:%02d\n",
tm->tm_hour, tm->tm_min, tm->tm_sec);
}
}
}
/*
* Show collected CPU/DSP callee/caller information.
*
* Hint: As caller info list is based on number of loaded symbols,
* load only text symbols to save memory & make things faster...
*/
void Profile_ShowCallers(FILE *fp, int sites, callee_t *callsite, const char * (*addr2name)(Uint32, Uint64 *))
{
int i, j, countissues, countdiff;
const char *name;
caller_t *info;
Uint64 total;
Uint32 addr, typeaddr;
/* legend */
fputs("# <callee>: <caller1> = <calls> <types>[ <inclusive/totals>[ <exclusive/totals>]], <caller2> ..., <callee name>", fp);
fputs("\n# types: ", fp);
for (i = 0; i < ARRAYSIZE(flaginfo); i++) {
fprintf(fp, "%c = %s, ", flaginfo[i].chr, flaginfo[i].info);
}
fputs("\n# totals: calls/instructions/cycles/misses\n", fp);
countdiff = 0;
countissues = 0;
for (i = 0; i < sites; i++, callsite++) {
addr = callsite->addr;
if (!addr) {
continue;
}
name = addr2name(addr, &total);
fprintf(fp, "0x%x: ", callsite->addr);
typeaddr = 0;
info = callsite->callers;
qsort(info, callsite->count, sizeof(*info), cmp_callers);
for (j = 0; j < callsite->count; j++, info++) {
if (!info->calls) {
break;
}
total -= info->calls;
output_caller_info(fp, info, &typeaddr);
}
if (name) {
fprintf(fp, "%s", name);
}
fputs("\n", fp);
if (total) {
#if DEBUG
fprintf(stderr, "WARNING: %llu differences in call and instruction counts for '%s'!\n", total, name);
#endif
countdiff += total;
countissues++;
}
if (typeaddr) {
fprintf(stderr, "WARNING: different types of calls (at least) from 0x%x (to 0x%x),\n\t has its codechanged during profiling?\n",
typeaddr, callsite->addr);
}
}
if (countissues) {
if (countdiff <= 2 && countissues == countdiff) {
fprintf(stderr, "WARNING: callcount mismatches (%d calls) with address instruction\n\t counts in %d cases, most likely profile start & end.\n",
countdiff, countissues);
} else {
/* profiler bug: some (address?) mismatch in recording instruction counts and call counts */
fprintf(stderr, "ERROR: callcount mismatches with address instruction counts\n\t(%d in total) detected in %d cases!\n",
countdiff, countissues);
}
}
}
/* Determines which function the control flow entered/left
* and prints the trace message. */
static int print_trace(void *addr, char const *dir)
{
static unsigned depth_limit;
static int depth_limited = -1, be_async = -1, entries_only = -1;
static int indent = -1, log_fname = -1;
char const *env, *colon, *fname, *funame;
int is_entry, success;
/* Read $TRACY_MAXDEPTH if we haven't. */
if (depth_limited < 0)
{
if ((env = getenv("TRACY_MAXDEPTH")) && env[0])
{
depth_limit = atoi(env);
depth_limited = 1;
} else
depth_limited = 0;
}
/* Have we reached the limit? */
if (depth_limited && Callstack_depth >= depth_limit)
return 1;
#ifndef __ARMEL__
{
void *addrs[3];
/*
* In the frame:
* [0] this function,
* [1] the instrumentation function,
* [2] the function we're interested in.
*
* On ARM backtrace() is unreliable, so use $addr directly.
* On x86 we can't avoid this call.
*/
if (backtrace(addrs, 3) < 3)
return 1;
addr = addrs[2];
}
#endif /* ! __ARMEL__ */
/* In async mode create a temporary file where we can write symbol
* addresses the program encounters on function calls enters. */
if (be_async < 0)
{
be_async = (env = getenv("TRACY_ASYNC")) && env[0] == '1';
if (be_async)
{
static char tmpfname[] = "/tmp/tracy.XXXXXX";
if ((Async_fd = mkstemp(tmpfname)) < 0)
{
LOGIT("mkstemp: %m");
be_async = 0;
} else
{
unlink(tmpfname);
atexit(resolve_backlog);
}
}
} /* be_async? */
/* Log only function entries? */
is_entry = dir[0] == 'E';
if (entries_only < 0)
entries_only = (env = getenv("TRACY_LOG_ENTRIES_ONLY"))
&& env[0] == '1';
if (entries_only)
dir = "";
/* Get how much to indent $fname:$funame. */
if (indent < 0)
indent = (env = getenv("TRACY_LOG_INDENT")) ? atoi(env) : 0;
/* Write the async file if necessary. */
if (Async_fd >= 0)
{ /* resolve_backlog() will resolve $addr when we exit. */
if (!entries_only || is_entry)
LOGIT("%s%s[%u]%*s[%p]", procinfo(), dir,
Callstack_depth,
1 + indent*Callstack_depth, " ", addr);
if (is_entry)
/* Try not to bloat the file, it'll have
* lots of identical entries anyway. */
write(Async_fd, &addr, sizeof(addr));
return 1;
}
/* Resolve $addr. */
if ((success = addr2name(&fname, &funame, addr)) < 0)
/* Omitted from output, don't count it in $Callstack_depth. */
return 0;
/* Don't log LEAVE:s if $entries_only. */
if (entries_only && !is_entry)
return 1;
/* Print or omit the "<$fname>:" in front of $funame? */
if (log_fname < 0)
log_fname = (env = getenv("TRACY_LOG_FNAME")) ? env[0] == '1' : 1;
if (log_fname)
colon = ":";
else
fname = colon = "";
/* Log the damn thing. */
if (success)
LOGIT("%s%s[%u]%*s%s%s%s()", procinfo(),
dir, Callstack_depth, 1 + indent*Callstack_depth, " ",
fname, colon, funame);
else
LOGIT("%s%s[%u]%*s%s%s[%p]", procinfo(),
dir, Callstack_depth, 1 + indent*Callstack_depth, " ",
fname, colon, addr);
/* We've logged something. */
return 1;
} /* print_trace */
static void connect_to_server(void)
{
/*Check for loops. Won't work if Listen undefined */
if(info->server_control.address.sin_addr.s_addr
== config.listen_address.sin_addr.s_addr &&
info->server_control.address.sin_port
== config.listen_address.sin_port)
die(ERROR, "Attempt to connect to self. "
"Do you need to set DoNTP to yes?",
421, "Proxy tried to loop. Closing connection", 0);
if(info->server_control.address.sin_addr.s_addr == 0) {
if(!config.ntp)
die(ERROR,
"Frox unable to determine destination address. "
"Do you need to set DoNTP to yes?",
501, "Unable to contact server", 0);
else if(config.ntpdest.sin_addr.s_addr)
die(ERROR,
"Frox unable to determine destination address. "
"Try commenting out NTPAddress",
501, "Unable to contact server", 0);
else
die(ERROR,
"Frox unable to determine detination address. "
"See FAQ for troubleshooting.", 501,
"Unable to contact server", 0);
}
resolve_addr(&info->final_server_address.sin_addr, info->server_name);
if(!config_connectionok(&info->client_control.address,
&info->final_server_address,
info->username ? sstr_buf(info->
username) : 0))
die(ATTACK, "Denied by ACLs.", 501, "Connection denied. Bye",
0);
if(config.ftpproxy.sin_addr.s_addr)
info->server_control.address = config.ftpproxy;
write_log(VERBOSE, "Connecting to server...");
info->server_control.fd =
connect_to_socket(&info->server_control.address,
&config.tcpoutaddr, config.contports);
if(info->server_control.fd == -1)
die(ERROR, "Connection closed -- unable to contact server",
501, "Proxy unable to contact ftp server", 0);
write_log(VERBOSE, " OK");
if(config.loglevel >= VERBOSE) { /*Save the overhead of DNS lookups */
write_log(VERBOSE, "Apparent address = %s",
sstr_buf(addr2name
(info->apparent_server_address.sin_addr)));
write_log(VERBOSE, "Real address = %s",
sstr_buf(addr2name
(info->final_server_address.sin_addr)));
write_log(VERBOSE, "Proxy address = %s",
sstr_buf(addr2name
(info->server_control.address.sin_addr)));
}
ssl_init();
}
void u_gethostname(u_buf_t *ubufp, char *hostn, int hostnsize) {
struct sockaddr_in *remotep;
remotep = (struct sockaddr_in *)ubufp;
addr2name(remotep->sin_addr, hostn, hostnsize);
}
