mirror of
https://github.com/sheumann/hush.git
synced 2024-08-20 19:29:02 +00:00
arp, networking/interface.c: eliminate statics
and unneeded on-stack buffers, disable (comment out) some apparently unused (and buggy) code paths. -700 bytes.
This commit is contained in:
Denis Vlasenko
parent
650a0459b8
commit
7f2527e5a7
@ -129,8 +129,8 @@ struct aftype {
|
||||
int af;
|
||||
int alen;
|
||||
char *(*print) (unsigned char *);
|
||||
char *(*sprint) (struct sockaddr *, int numeric);
|
||||
int (*input) (int type, char *bufp, struct sockaddr *);
|
||||
const char *(*sprint) (struct sockaddr *, int numeric);
|
||||
int (*input) (/*int type,*/ const char *bufp, struct sockaddr *);
|
||||
void (*herror) (char *text);
|
||||
int (*rprint) (int options);
|
||||
int (*rinput) (int typ, int ext, char **argv);
|
||||
@ -149,7 +149,7 @@ struct hwtype {
|
||||
int type;
|
||||
int alen;
|
||||
char *(*print) (unsigned char *);
|
||||
int (*input) (char *, struct sockaddr *);
|
||||
int (*input) (const char *, struct sockaddr *);
|
||||
int (*activate) (int fd);
|
||||
int suppress_null_addr;
|
||||
};
|
||||
|
||||
126
networking/arp.c
126
networking/arp.c
@ -27,8 +27,6 @@
|
||||
#define DFLT_AF "inet"
|
||||
#define DFLT_HW "ether"
|
||||
|
||||
#define _PATH_PROCNET_ARP "/proc/net/arp"
|
||||
|
||||
#define ARP_OPT_A (0x1)
|
||||
#define ARP_OPT_p (0x2)
|
||||
#define ARP_OPT_H (0x4)
|
||||
@ -64,7 +62,7 @@ static const char *const options[] = {
|
||||
/* Called only from main, once */
|
||||
static int arp_del(char **args)
|
||||
{
|
||||
char host[128];
|
||||
char *host;
|
||||
struct arpreq req;
|
||||
struct sockaddr sa;
|
||||
int flags = 0;
|
||||
@ -73,8 +71,8 @@ static int arp_del(char **args)
|
||||
memset(&req, 0, sizeof(req));
|
||||
|
||||
/* Resolve the host name. */
|
||||
safe_strncpy(host, *args, 128);
|
||||
if (ap->input(0, host, &sa) < 0) {
|
||||
host = *args;
|
||||
if (ap->input(host, &sa) < 0) {
|
||||
bb_herror_msg_and_die("%s", host);
|
||||
}
|
||||
|
||||
@ -130,8 +128,8 @@ static int arp_del(char **args)
|
||||
if (*++args == NULL)
|
||||
bb_show_usage();
|
||||
if (strcmp(*args, "255.255.255.255") != 0) {
|
||||
safe_strncpy(host, *args, 128);
|
||||
if (ap->input(0, host, &sa) < 0) {
|
||||
host = *args;
|
||||
if (ap->input(host, &sa) < 0) {
|
||||
bb_herror_msg_and_die("%s", host);
|
||||
}
|
||||
memcpy(&req.arp_netmask, &sa, sizeof(struct sockaddr));
|
||||
@ -213,15 +211,15 @@ static void arp_getdevhw(char *ifname, struct sockaddr *sa,
|
||||
/* Called only from main, once */
|
||||
static int arp_set(char **args)
|
||||
{
|
||||
char host[128];
|
||||
char *host;
|
||||
struct arpreq req;
|
||||
struct sockaddr sa;
|
||||
int flags;
|
||||
|
||||
memset(&req, 0, sizeof(req));
|
||||
|
||||
safe_strncpy(host, *args++, 128);
|
||||
if (ap->input(0, host, &sa) < 0) {
|
||||
host = *args++;
|
||||
if (ap->input(host, &sa) < 0) {
|
||||
bb_herror_msg_and_die("%s", host);
|
||||
}
|
||||
/* If a host has more than one address, use the correct one! */
|
||||
@ -285,8 +283,8 @@ static int arp_set(char **args)
|
||||
if (*++args == NULL)
|
||||
bb_show_usage();
|
||||
if (strcmp(*args, "255.255.255.255") != 0) {
|
||||
safe_strncpy(host, *args++, 128);
|
||||
if (ap->input(0, host, &sa) < 0) {
|
||||
host = *args;
|
||||
if (ap->input(host, &sa) < 0) {
|
||||
bb_herror_msg_and_die("%s", host);
|
||||
}
|
||||
memcpy(&req.arp_netmask, &sa, sizeof(struct sockaddr));
|
||||
@ -362,82 +360,82 @@ arp_disp(const char *name, char *ip, int type, int arp_flags,
|
||||
/* Called only from main, once */
|
||||
static int arp_show(char *name)
|
||||
{
|
||||
char host[100];
|
||||
struct sockaddr sa;
|
||||
char ip[100];
|
||||
char hwa[100];
|
||||
char mask[100];
|
||||
char line[200];
|
||||
char dev[100];
|
||||
int type, flags;
|
||||
FILE *fp;
|
||||
const char *host;
|
||||
const char *hostname;
|
||||
FILE *fp;
|
||||
struct sockaddr sa;
|
||||
int type, flags;
|
||||
int num;
|
||||
unsigned entries = 0, shown = 0;
|
||||
char ip[128];
|
||||
char hwa[128];
|
||||
char mask[128];
|
||||
char line[128];
|
||||
char dev[128];
|
||||
|
||||
host[0] = '\0';
|
||||
|
||||
host = NULL;
|
||||
if (name != NULL) {
|
||||
/* Resolve the host name. */
|
||||
safe_strncpy(host, name, (sizeof host));
|
||||
if (ap->input(0, host, &sa) < 0) {
|
||||
bb_herror_msg_and_die("%s", host);
|
||||
if (ap->input(name, &sa) < 0) {
|
||||
bb_herror_msg_and_die("%s", name);
|
||||
}
|
||||
safe_strncpy(host, ap->sprint(&sa, 1), sizeof(host));
|
||||
host = xstrdup(ap->sprint(&sa, 1));
|
||||
}
|
||||
/* Open the PROCps kernel table. */
|
||||
fp = xfopen(_PATH_PROCNET_ARP, "r");
|
||||
/* Bypass header -- read until newline */
|
||||
if (fgets(line, sizeof(line), fp) != (char *) NULL) {
|
||||
fp = xfopen("/proc/net/arp", "r");
|
||||
/* Bypass header -- read one line */
|
||||
fgets(line, sizeof(line), fp);
|
||||
|
||||
/* Read the ARP cache entries. */
|
||||
while (fgets(line, sizeof(line), fp)) {
|
||||
|
||||
mask[0] = '-'; mask[1] = '\0';
|
||||
dev[0] = '-'; dev[1] = '\0';
|
||||
/* Read the ARP cache entries. */
|
||||
for (; fgets(line, sizeof(line), fp);) {
|
||||
num = sscanf(line, "%s 0x%x 0x%x %100s %100s %100s\n",
|
||||
ip, &type, &flags, hwa, mask, dev);
|
||||
if (num < 4)
|
||||
break;
|
||||
/* All these strings can't overflow
|
||||
* because fgets above reads limited amount of data */
|
||||
num = sscanf(line, "%s 0x%x 0x%x %s %s %s\n",
|
||||
ip, &type, &flags, hwa, mask, dev);
|
||||
if (num < 4)
|
||||
break;
|
||||
|
||||
entries++;
|
||||
/* if the user specified hw-type differs, skip it */
|
||||
if (hw_set && (type != hw->type))
|
||||
continue;
|
||||
entries++;
|
||||
/* if the user specified hw-type differs, skip it */
|
||||
if (hw_set && (type != hw->type))
|
||||
continue;
|
||||
|
||||
/* if the user specified address differs, skip it */
|
||||
if (host[0] && strcmp(ip, host) != 0)
|
||||
continue;
|
||||
/* if the user specified address differs, skip it */
|
||||
if (host && strcmp(ip, host) != 0)
|
||||
continue;
|
||||
|
||||
/* if the user specified device differs, skip it */
|
||||
if (device[0] && strcmp(dev, device) != 0)
|
||||
continue;
|
||||
/* if the user specified device differs, skip it */
|
||||
if (device[0] && strcmp(dev, device) != 0)
|
||||
continue;
|
||||
|
||||
shown++;
|
||||
/* This IS ugly but it works -be */
|
||||
if (option_mask32 & ARP_OPT_n)
|
||||
shown++;
|
||||
/* This IS ugly but it works -be */
|
||||
hostname = "?";
|
||||
if (!(option_mask32 & ARP_OPT_n)) {
|
||||
if (ap->input(ip, &sa) < 0)
|
||||
hostname = ip;
|
||||
else
|
||||
hostname = ap->sprint(&sa, (option_mask32 & ARP_OPT_n) | 0x8000);
|
||||
if (strcmp(hostname, ip) == 0)
|
||||
hostname = "?";
|
||||
else {
|
||||
if (ap->input(0, ip, &sa) < 0)
|
||||
hostname = ip;
|
||||
else
|
||||
hostname = ap->sprint(&sa, (option_mask32 & ARP_OPT_n) | 0x8000);
|
||||
if (strcmp(hostname, ip) == 0)
|
||||
hostname = "?";
|
||||
}
|
||||
|
||||
arp_disp(hostname, ip, type, flags, hwa, mask, dev);
|
||||
}
|
||||
|
||||
arp_disp(hostname, ip, type, flags, hwa, mask, dev);
|
||||
}
|
||||
if (option_mask32 & ARP_OPT_v)
|
||||
printf("Entries: %d\tSkipped: %d\tFound: %d\n",
|
||||
entries, entries - shown, shown);
|
||||
|
||||
if (!shown) {
|
||||
if (hw_set || host[0] || device[0])
|
||||
if (hw_set || host || device[0])
|
||||
printf("No match found in %d entries\n", entries);
|
||||
}
|
||||
|
||||
fclose(fp);
|
||||
|
||||
if (ENABLE_FEATURE_CLEAN_UP) {
|
||||
free((char*)host);
|
||||
fclose(fp);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
@ -82,12 +82,12 @@ struct in6_ifreq {
|
||||
#endif
|
||||
|
||||
/* Display an Internet socket address. */
|
||||
static char *INET_sprint(struct sockaddr *sap, int numeric)
|
||||
static const char *INET_sprint(struct sockaddr *sap, int numeric)
|
||||
{
|
||||
static char buff[128];
|
||||
|
||||
if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
|
||||
return safe_strncpy(buff, "[NONE SET]", sizeof(buff));
|
||||
return "[NONE SET]";
|
||||
|
||||
if (INET_rresolve(buff, sizeof(buff), (struct sockaddr_in *) sap,
|
||||
numeric, 0xffffff00) != 0)
|
||||
@ -96,6 +96,7 @@ static char *INET_sprint(struct sockaddr *sap, int numeric)
|
||||
return buff;
|
||||
}
|
||||
|
||||
#ifdef UNUSED_AND_BUGGY
|
||||
static int INET_getsock(char *bufp, struct sockaddr *sap)
|
||||
{
|
||||
char *sp = bufp, *bp;
|
||||
@ -136,9 +137,12 @@ static int INET_getsock(char *bufp, struct sockaddr *sap)
|
||||
|
||||
return (sp - bufp);
|
||||
}
|
||||
#endif
|
||||
|
||||
static int INET_input(int type, char *bufp, struct sockaddr *sap)
|
||||
static int INET_input(/*int type,*/ const char *bufp, struct sockaddr *sap)
|
||||
{
|
||||
return INET_resolve(bufp, (struct sockaddr_in *) sap, 0);
|
||||
/*
|
||||
switch (type) {
|
||||
case 1:
|
||||
return (INET_getsock(bufp, sap));
|
||||
@ -147,6 +151,7 @@ static int INET_input(int type, char *bufp, struct sockaddr *sap)
|
||||
default:
|
||||
return (INET_resolve(bufp, (struct sockaddr_in *) sap, 0));
|
||||
}
|
||||
*/
|
||||
}
|
||||
|
||||
static struct aftype inet_aftype = {
|
||||
@ -163,17 +168,18 @@ static struct aftype inet_aftype = {
|
||||
|
||||
/* Display an Internet socket address. */
|
||||
/* dirty! struct sockaddr usually doesn't suffer for inet6 addresses, fst. */
|
||||
static char *INET6_sprint(struct sockaddr *sap, int numeric)
|
||||
static const char *INET6_sprint(struct sockaddr *sap, int numeric)
|
||||
{
|
||||
static char buff[128];
|
||||
|
||||
if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
|
||||
return safe_strncpy(buff, "[NONE SET]", sizeof(buff));
|
||||
return "[NONE SET]";
|
||||
if (INET6_rresolve(buff, sizeof(buff), (struct sockaddr_in6 *) sap, numeric))
|
||||
return safe_strncpy(buff, "[UNKNOWN]", sizeof(buff));
|
||||
return "[UNKNOWN]";
|
||||
return buff;
|
||||
}
|
||||
|
||||
#ifdef UNUSED
|
||||
static int INET6_getsock(char *bufp, struct sockaddr *sap)
|
||||
{
|
||||
struct sockaddr_in6 *sin6;
|
||||
@ -187,15 +193,19 @@ static int INET6_getsock(char *bufp, struct sockaddr *sap)
|
||||
|
||||
return 16; /* ?;) */
|
||||
}
|
||||
#endif
|
||||
|
||||
static int INET6_input(int type, char *bufp, struct sockaddr *sap)
|
||||
static int INET6_input(/*int type,*/ const char *bufp, struct sockaddr *sap)
|
||||
{
|
||||
return INET6_resolve(bufp, (struct sockaddr_in6 *) sap);
|
||||
/*
|
||||
switch (type) {
|
||||
case 1:
|
||||
return (INET6_getsock(bufp, sap));
|
||||
default:
|
||||
return (INET6_resolve(bufp, (struct sockaddr_in6 *) sap));
|
||||
}
|
||||
*/
|
||||
}
|
||||
|
||||
static struct aftype inet6_aftype = {
|
||||
@ -229,12 +239,10 @@ static char *UNSPEC_print(unsigned char *ptr)
|
||||
}
|
||||
|
||||
/* Display an UNSPEC socket address. */
|
||||
static char *UNSPEC_sprint(struct sockaddr *sap, int numeric)
|
||||
static const char *UNSPEC_sprint(struct sockaddr *sap, int numeric)
|
||||
{
|
||||
static char buf[64];
|
||||
|
||||
if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
|
||||
return safe_strncpy(buf, "[NONE SET]", sizeof(buf));
|
||||
return "[NONE SET]";
|
||||
return UNSPEC_print((unsigned char *)sap->sa_data);
|
||||
}
|
||||
|
||||
@ -809,7 +817,7 @@ static char *pr_ether(unsigned char *ptr)
|
||||
return buff;
|
||||
}
|
||||
|
||||
static int in_ether(char *bufp, struct sockaddr *sap);
|
||||
static int in_ether(const char *bufp, struct sockaddr *sap);
|
||||
|
||||
static struct hwtype ether_hwtype = {
|
||||
.name = "ether",
|
||||
@ -831,10 +839,10 @@ static unsigned hexchar2int(char c)
|
||||
}
|
||||
|
||||
/* Input an Ethernet address and convert to binary. */
|
||||
static int in_ether(char *bufp, struct sockaddr *sap)
|
||||
static int in_ether(const char *bufp, struct sockaddr *sap)
|
||||
{
|
||||
unsigned char *ptr;
|
||||
char c, *orig;
|
||||
char c;
|
||||
int i;
|
||||
unsigned val;
|
||||
|
||||
@ -842,7 +850,6 @@ static int in_ether(char *bufp, struct sockaddr *sap)
|
||||
ptr = (unsigned char*) sap->sa_data;
|
||||
|
||||
i = 0;
|
||||
orig = bufp;
|
||||
while ((*bufp != '\0') && (i < ETH_ALEN)) {
|
||||
val = hexchar2int(*bufp++) * 0x10;
|
||||
if (val > 0xff) {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user