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