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Some formatting updates (ran the code through indent)

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-Erik
This commit is contained in:
Erik Andersen
2000-02-08 19:58:47 +00:00
parent c0bf817bbc
commit e49d5ecbbe
163 changed files with 27109 additions and 26607 deletions
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175
networking/nslookup.c
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@@ -1,3 +1,4 @@
/* vi: set sw=4 ts=4: */
/*
* Mini nslookup implementation for busybox
*
@@ -41,148 +42,136 @@
| + find out how the real nslookup gets the default name server
*/
static const char nslookup_usage[] =
"nslookup [HOST]\n\n"
;
static const char nslookup_usage[] = "nslookup [HOST]\n\n";
/* I have to see how the real nslookup does this.
* I could dig through /etc/resolv.conf, but is there a
* better (programatic) way?
*/
static void
server_fprint(FILE *dst)
static void server_fprint(FILE * dst)
{
fprintf(dst, "Server: %s\n", "something");
fprintf(dst, "Address: %s\n\n", "something");
fprintf(dst, "Server: %s\n", "something");
fprintf(dst, "Address: %s\n\n", "something");
}
/* only works for IPv4 */
static int
addr_fprint(char *addr, FILE *dst)
static int addr_fprint(char *addr, FILE * dst)
{
uint8_t split[4];
uint32_t ip;
uint32_t *x = (uint32_t *) addr;
uint8_t split[4];
uint32_t ip;
uint32_t *x = (uint32_t *) addr;
ip = ntohl(*x);
split[0] = (ip & 0xff000000) >> 24;
split[1] = (ip & 0x00ff0000) >> 16;
split[2] = (ip & 0x0000ff00) >> 8;
split[3] = (ip & 0x000000ff);
fprintf (
dst, "%d.%d.%d.%d",
split[0], split[1], split[2], split[3]
);
return 0;
ip = ntohl(*x);
split[0] = (ip & 0xff000000) >> 24;
split[1] = (ip & 0x00ff0000) >> 16;
split[2] = (ip & 0x0000ff00) >> 8;
split[3] = (ip & 0x000000ff);
fprintf(dst, "%d.%d.%d.%d", split[0], split[1], split[2], split[3]
);
return 0;
}
/* changes a c-string matching the perl regex \d+\.\d+\.\d+\.\d+
* into a uint32_t
*/
static uint32_t
str_to_addr(const char *addr)
static uint32_t str_to_addr(const char *addr)
{
uint32_t split[4];
uint32_t ip;
uint32_t split[4];
uint32_t ip;
sscanf(addr, "%d.%d.%d.%d",
&split[0], &split[1], &split[2], &split[3]);
sscanf(addr, "%d.%d.%d.%d",
&split[0], &split[1], &split[2], &split[3]);
/* assuming sscanf worked */
ip = (split[0] << 24) |
(split[1] << 16) |
(split[2] << 8) |
(split[3]);
/* assuming sscanf worked */
ip = (split[0] << 24) |
(split[1] << 16) | (split[2] << 8) | (split[3]);
return htonl(ip);
return htonl(ip);
}
/* takes the NULL-terminated array h_addr_list, and
* prints its contents appropriately
*/
static int
addr_list_fprint(char **h_addr_list, FILE *dst)
static int addr_list_fprint(char **h_addr_list, FILE * dst)
{
int i, j;
char *addr_string = (h_addr_list[1])
? "Addresses"
: "Address";
int i, j;
char *addr_string = (h_addr_list[1])
? "Addresses" : "Address";
fprintf(dst, "%s: ", addr_string);
for (i = 0, j = 0; h_addr_list[i]; i++, j++) {
addr_fprint(h_addr_list[i], dst);
fprintf(dst, "%s: ", addr_string);
for (i = 0, j = 0; h_addr_list[i]; i++, j++) {
addr_fprint(h_addr_list[i], dst);
/* real nslookup does this */
if (j == 4) {
if (h_addr_list[i + 1]) {
fprintf(dst, "\n ");
}
j = 0;
} else {
if (h_addr_list[i + 1]) {
fprintf(dst, ", ");
}
}
/* real nslookup does this */
if (j == 4) {
if (h_addr_list[i+1]) {
fprintf(dst, "\n ");
}
j = 0;
} else {
if (h_addr_list[i+1]) {
fprintf(dst, ", ");
}
}
}
fprintf(dst,"\n");
return 0;
fprintf(dst, "\n");
return 0;
}
/* gethostbyaddr wrapper */
static struct hostent *
gethostbyaddr_wrapper(const char *address)
static struct hostent *gethostbyaddr_wrapper(const char *address)
{
struct in_addr addr;
struct in_addr addr;
addr.s_addr = str_to_addr(address);
return gethostbyaddr((char *) &addr, 4, AF_INET); /* IPv4 only for now */
addr.s_addr = str_to_addr(address);
return gethostbyaddr((char *) &addr, 4, AF_INET); /* IPv4 only for now */
}
/* print the results as nslookup would */
static struct hostent *
hostent_fprint(struct hostent *host, FILE *dst)
static struct hostent *hostent_fprint(struct hostent *host, FILE * dst)
{
if (host) {
fprintf(dst, "Name: %s\n", host->h_name);
addr_list_fprint(host->h_addr_list, dst);
} else {
fprintf(dst, "*** %s\n", hstrerror(h_errno));
}
return host;
if (host) {
fprintf(dst, "Name: %s\n", host->h_name);
addr_list_fprint(host->h_addr_list, dst);
} else {
fprintf(dst, "*** %s\n", hstrerror(h_errno));
}
return host;
}
/* naive function to check whether char *s is an ip address */
static int
is_ip_address(const char *s)
static int is_ip_address(const char *s)
{
while (*s) {
if ((isdigit(*s)) || (*s == '.')) { s++; continue; }
return 0;
}
return 1;
while (*s) {
if ((isdigit(*s)) || (*s == '.')) {
s++;
continue;
}
return 0;
}
return 1;
}
/* ________________________________________________________________________ */
int
nslookup_main(int argc, char **argv)
int nslookup_main(int argc, char **argv)
{
struct hostent *host;
struct hostent *host;
if (argc < 2) {
usage(nslookup_usage);
}
if (argc < 2) {
usage(nslookup_usage);
}
server_fprint(stdout);
if (is_ip_address(argv[1])) {
host = gethostbyaddr_wrapper(argv[1]);
} else {
host = gethostbyname(argv[1]);
}
hostent_fprint(host, stdout);
return 0;
server_fprint(stdout);
if (is_ip_address(argv[1])) {
host = gethostbyaddr_wrapper(argv[1]);
} else {
host = gethostbyname(argv[1]);
}
hostent_fprint(host, stdout);
return 0;
}
/* $Id: nslookup.c,v 1.3 2000/02/07 05:29:42 erik Exp $ */
/* $Id: nslookup.c,v 1.4 2000/02/08 19:58:47 erik Exp $ */