mirror of
https://github.com/sheumann/hush.git
synced 2024-12-21 08:29:45 +00:00
networking/interface.c: huke remaining big statics; use malloc for INET[6]_rresolve
return value. Went thru callers and adjusted them - code got smaller too. function old new delta ip_port_str - 126 +126 INET6_rresolve 165 182 +17 static.cache 20 24 +4 route_main 2092 2091 -1 INET_sprint 61 59 -2 INET_nn 4 - -4 INET6_sprint 59 53 -6 udp_do_one 518 508 -10 tcp_do_one 433 423 -10 raw_do_one 494 484 -10 traceroute_main 4117 4105 -12 INET_rresolve 334 321 -13 bb_displayroutes 494 456 -38 snprint_ip_port 244 - -244 static.buff 264 16 -248 ------------------------------------------------------------------------------ (add/remove: 1/2 grow/shrink: 2/10 up/down: 147/-598) Total: -451 bytes size busybox_old busybox_unstripped text data bss dec hex filename 751073 3048 14688 768809 bbb29 busybox_old 750873 3048 14440 768361 bb969 busybox_unstripped
This commit is contained in:
Denis Vlasenko
parent
1b16bdaebf
commit
6d9ea24611
@ -18,9 +18,9 @@ int INET_resolve(const char *name, struct sockaddr_in *s_in, int hostfirst);
|
||||
* & 0x4000: host instead of net,
|
||||
* & 0x0fff: don't resolve
|
||||
*/
|
||||
int INET_rresolve(char *name, size_t len, struct sockaddr_in *s_in,
|
||||
int numeric, unsigned int netmask);
|
||||
|
||||
|
||||
int INET6_resolve(const char *name, struct sockaddr_in6 *sin6);
|
||||
int INET6_rresolve(char *name, size_t len, struct sockaddr_in6 *sin6, int numeric);
|
||||
|
||||
/* These return malloced string */
|
||||
char *INET_rresolve(struct sockaddr_in *s_in, int numeric, uint32_t netmask);
|
||||
char *INET6_rresolve(struct sockaddr_in6 *sin6, int numeric);
|
||||
|
||||
@ -72,26 +72,24 @@ int INET_resolve(const char *name, struct sockaddr_in *s_in, int hostfirst)
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* cache */
|
||||
struct addr {
|
||||
struct sockaddr_in addr;
|
||||
char *name;
|
||||
int host;
|
||||
struct addr *next;
|
||||
};
|
||||
|
||||
static struct addr *INET_nn = NULL; /* addr-to-name cache */
|
||||
|
||||
/* numeric: & 0x8000: default instead of *,
|
||||
* & 0x4000: host instead of net,
|
||||
* & 0x0fff: don't resolve
|
||||
*/
|
||||
int INET_rresolve(char *name, size_t len, struct sockaddr_in *s_in,
|
||||
int numeric, unsigned int netmask)
|
||||
char *INET_rresolve(struct sockaddr_in *s_in, int numeric, uint32_t netmask)
|
||||
{
|
||||
struct hostent *ent;
|
||||
struct netent *np;
|
||||
/* addr-to-name cache */
|
||||
struct addr {
|
||||
struct addr *next;
|
||||
struct sockaddr_in addr;
|
||||
int host;
|
||||
char name[1];
|
||||
};
|
||||
static struct addr *cache = NULL;
|
||||
|
||||
struct addr *pn;
|
||||
char *name;
|
||||
uint32_t ad, host_ad;
|
||||
int host = 0;
|
||||
|
||||
@ -102,7 +100,7 @@ int INET_rresolve(char *name, size_t len, struct sockaddr_in *s_in,
|
||||
s_in->sin_family);
|
||||
#endif
|
||||
errno = EAFNOSUPPORT;
|
||||
return -1;
|
||||
return NULL;
|
||||
}
|
||||
ad = s_in->sin_addr.s_addr;
|
||||
#ifdef DEBUG
|
||||
@ -111,62 +109,58 @@ int INET_rresolve(char *name, size_t len, struct sockaddr_in *s_in,
|
||||
if (ad == INADDR_ANY) {
|
||||
if ((numeric & 0x0FFF) == 0) {
|
||||
if (numeric & 0x8000)
|
||||
safe_strncpy(name, bb_str_default, len);
|
||||
else
|
||||
safe_strncpy(name, "*", len);
|
||||
return 0;
|
||||
return xstrdup(bb_str_default);
|
||||
return xstrdup("*");
|
||||
}
|
||||
}
|
||||
if (numeric & 0x0FFF) {
|
||||
safe_strncpy(name, inet_ntoa(s_in->sin_addr), len);
|
||||
return 0;
|
||||
}
|
||||
if (numeric & 0x0FFF)
|
||||
return xstrdup(inet_ntoa(s_in->sin_addr));
|
||||
|
||||
if ((ad & (~netmask)) != 0 || (numeric & 0x4000))
|
||||
host = 1;
|
||||
pn = INET_nn;
|
||||
while (pn != NULL) {
|
||||
pn = cache;
|
||||
while (pn) {
|
||||
if (pn->addr.sin_addr.s_addr == ad && pn->host == host) {
|
||||
safe_strncpy(name, pn->name, len);
|
||||
#ifdef DEBUG
|
||||
bb_error_msg("rresolve: found %s %08x in cache",
|
||||
(host ? "host" : "net"), (unsigned)ad);
|
||||
#endif
|
||||
return 0;
|
||||
return xstrdup(pn->name);
|
||||
}
|
||||
pn = pn->next;
|
||||
}
|
||||
|
||||
host_ad = ntohl(ad);
|
||||
np = NULL;
|
||||
ent = NULL;
|
||||
name = NULL;
|
||||
if (host) {
|
||||
struct hostent *ent;
|
||||
#ifdef DEBUG
|
||||
bb_error_msg("gethostbyaddr (%08x)", (unsigned)ad);
|
||||
#endif
|
||||
ent = gethostbyaddr((char *) &ad, 4, AF_INET);
|
||||
if (ent != NULL) {
|
||||
safe_strncpy(name, ent->h_name, len);
|
||||
}
|
||||
if (ent)
|
||||
name = xstrdup(ent->h_name);
|
||||
} else {
|
||||
/* Hmmm... this is very rare to have named nets,
|
||||
* and this getnetbyaddr() call is the only one in bbox.
|
||||
* Maybe get rid of or make configurable? */
|
||||
struct netent *np;
|
||||
#ifdef DEBUG
|
||||
bb_error_msg("getnetbyaddr (%08x)", (unsigned)host_ad);
|
||||
#endif
|
||||
np = getnetbyaddr(host_ad, AF_INET);
|
||||
if (np != NULL) {
|
||||
safe_strncpy(name, np->n_name, len);
|
||||
}
|
||||
if (np)
|
||||
name = xstrdup(np->n_name);
|
||||
}
|
||||
if (!ent && !np) {
|
||||
safe_strncpy(name, inet_ntoa(s_in->sin_addr), len);
|
||||
}
|
||||
pn = xmalloc(sizeof(struct addr));
|
||||
if (!name)
|
||||
name = xstrdup(inet_ntoa(s_in->sin_addr));
|
||||
pn = xmalloc(sizeof(*pn) + strlen(name)); /* no '+ 1', it's already accounted for */
|
||||
pn->next = cache;
|
||||
pn->addr = *s_in;
|
||||
pn->next = INET_nn;
|
||||
pn->host = host;
|
||||
pn->name = xstrdup(name);
|
||||
INET_nn = pn;
|
||||
return 0;
|
||||
strcpy(pn->name, name);
|
||||
cache = pn;
|
||||
return name;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_FEATURE_IPV6
|
||||
@ -195,9 +189,9 @@ int INET6_resolve(const char *name, struct sockaddr_in6 *sin6)
|
||||
#endif
|
||||
|
||||
|
||||
int INET6_rresolve(char *name, size_t len, struct sockaddr_in6 *sin6,
|
||||
int numeric)
|
||||
char *INET6_rresolve(struct sockaddr_in6 *sin6, int numeric)
|
||||
{
|
||||
char name[128];
|
||||
int s;
|
||||
|
||||
/* Grmpf. -FvK */
|
||||
@ -207,29 +201,25 @@ int INET6_rresolve(char *name, size_t len, struct sockaddr_in6 *sin6,
|
||||
sin6->sin6_family);
|
||||
#endif
|
||||
errno = EAFNOSUPPORT;
|
||||
return -1;
|
||||
return NULL;
|
||||
}
|
||||
if (numeric & 0x7FFF) {
|
||||
inet_ntop(AF_INET6, &sin6->sin6_addr, name, len);
|
||||
return 0;
|
||||
inet_ntop(AF_INET6, &sin6->sin6_addr, name, sizeof(name));
|
||||
return xstrdup(name);
|
||||
}
|
||||
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
|
||||
if (numeric & 0x8000) {
|
||||
strcpy(name, bb_str_default);
|
||||
} else {
|
||||
name[0] = '*';
|
||||
name[1] = '\0';
|
||||
}
|
||||
return 0;
|
||||
if (numeric & 0x8000)
|
||||
return xstrdup(bb_str_default);
|
||||
return xstrdup("*");
|
||||
}
|
||||
|
||||
s = getnameinfo((struct sockaddr *) sin6, sizeof(struct sockaddr_in6),
|
||||
name, len, NULL, 0, 0);
|
||||
name, sizeof(name), NULL, 0, 0);
|
||||
if (s) {
|
||||
bb_error_msg("getnameinfo failed");
|
||||
return -1;
|
||||
return NULL;
|
||||
}
|
||||
return 0;
|
||||
return xstrdup(name);
|
||||
}
|
||||
|
||||
#endif /* CONFIG_FEATURE_IPV6 */
|
||||
|
||||
@ -84,13 +84,12 @@ struct in6_ifreq {
|
||||
/* Display an Internet socket address. */
|
||||
static const char *INET_sprint(struct sockaddr *sap, int numeric)
|
||||
{
|
||||
static char buff[128];
|
||||
static char *buff;
|
||||
|
||||
free(buff);
|
||||
if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
|
||||
return "[NONE SET]";
|
||||
if (INET_rresolve(buff, sizeof(buff), (struct sockaddr_in *) sap,
|
||||
numeric, 0xffffff00) != 0)
|
||||
return NULL;
|
||||
buff = INET_rresolve((struct sockaddr_in *) sap, numeric, 0xffffff00);
|
||||
return buff;
|
||||
}
|
||||
|
||||
@ -167,12 +166,12 @@ static const struct aftype inet_aftype = {
|
||||
/* dirty! struct sockaddr usually doesn't suffer for inet6 addresses, fst. */
|
||||
static const char *INET6_sprint(struct sockaddr *sap, int numeric)
|
||||
{
|
||||
static char buff[128];
|
||||
static char *buff;
|
||||
|
||||
free(buff);
|
||||
if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
|
||||
return "[NONE SET]";
|
||||
if (INET6_rresolve(buff, sizeof(buff), (struct sockaddr_in6 *) sap, numeric))
|
||||
return "[UNKNOWN]";
|
||||
buff = INET6_rresolve((struct sockaddr_in6 *) sap, numeric);
|
||||
return buff;
|
||||
}
|
||||
|
||||
|
||||
@ -120,50 +120,33 @@ static void build_ipv4_addr(char* local_addr, struct sockaddr_in* localaddr)
|
||||
((struct sockaddr *) localaddr)->sa_family = AF_INET;
|
||||
}
|
||||
|
||||
static const char *get_sname(int port, const char *proto, int num)
|
||||
static const char *get_sname(int port, const char *proto, int numeric)
|
||||
{
|
||||
/* hummm, we return static buffer here!! */
|
||||
const char *str = itoa(ntohs(port));
|
||||
if (!num) {
|
||||
if (!port)
|
||||
return "*";
|
||||
if (!numeric) {
|
||||
struct servent *se = getservbyport(port, proto);
|
||||
if (se)
|
||||
str = se->s_name;
|
||||
return se->s_name;
|
||||
}
|
||||
if (!port) {
|
||||
str = "*";
|
||||
}
|
||||
return str;
|
||||
/* hummm, we may return static buffer here!! */
|
||||
return itoa(ntohs(port));
|
||||
}
|
||||
|
||||
static void snprint_ip_port(char *ip_port, int size, struct sockaddr *addr, int port, const char *proto, int numeric)
|
||||
static char *ip_port_str(struct sockaddr *addr, int port, const char *proto, int numeric)
|
||||
{
|
||||
const char *port_name;
|
||||
int max_len;
|
||||
int port_name_len;
|
||||
enum { salen = USE_FEATURE_IPV6(sizeof(struct sockaddr_in6)) SKIP_FEATURE_IPV6(sizeof(struct sockaddr_in)) };
|
||||
char *host, *host_port;
|
||||
|
||||
// TODO: replace by xmalloc_sockaddr2host?
|
||||
#if ENABLE_FEATURE_IPV6
|
||||
if (addr->sa_family == AF_INET6) {
|
||||
INET6_rresolve(ip_port, size, (struct sockaddr_in6 *)addr,
|
||||
(numeric & NETSTAT_NUMERIC) ? 0x0fff : 0);
|
||||
} else
|
||||
#endif
|
||||
{
|
||||
INET_rresolve(ip_port, size, (struct sockaddr_in *)addr,
|
||||
0x4000 | ((numeric & NETSTAT_NUMERIC) ? 0x0fff : 0),
|
||||
0xffffffff);
|
||||
}
|
||||
port_name = get_sname(htons(port), proto, numeric);
|
||||
/* Code which used "*" for INADDR_ANY is removed: it's ambiguous in IPv6,
|
||||
* while "0.0.0.0" is not. */
|
||||
|
||||
max_len = (option_mask32 & OPT_widedisplay)
|
||||
? (PRINT_IP_MAX_SIZE_WIDE - 1)
|
||||
: (PRINT_IP_MAX_SIZE - 1);
|
||||
port_name_len = strlen(port_name);
|
||||
if ((strlen(ip_port) + port_name_len) > max_len)
|
||||
ip_port[max_len - port_name_len] = '\0';
|
||||
ip_port += strlen(ip_port);
|
||||
*ip_port++ = ':';
|
||||
strcpy(ip_port, port_name);
|
||||
host = numeric ? xmalloc_sockaddr2dotted_noport(addr, salen)
|
||||
: xmalloc_sockaddr2host_noport(addr, salen);
|
||||
|
||||
host_port = xasprintf("%s:%s", host, get_sname(htons(port), proto, numeric));
|
||||
free(host);
|
||||
return host_port;
|
||||
}
|
||||
|
||||
static void tcp_do_one(int lnr, const char *line)
|
||||
@ -206,14 +189,16 @@ static void tcp_do_one(int lnr, const char *line)
|
||||
if ((rem_port && (flags & NETSTAT_CONNECTED))
|
||||
|| (!rem_port && (flags & NETSTAT_LISTENING))
|
||||
) {
|
||||
snprint_ip_port(local_addr, sizeof(local_addr),
|
||||
char *l = ip_port_str(
|
||||
(struct sockaddr *) &localaddr, local_port,
|
||||
"tcp", flags & NETSTAT_NUMERIC);
|
||||
snprint_ip_port(rem_addr, sizeof(rem_addr),
|
||||
char *r = ip_port_str(
|
||||
(struct sockaddr *) &remaddr, rem_port,
|
||||
"tcp", flags & NETSTAT_NUMERIC);
|
||||
printf(net_conn_line,
|
||||
"tcp", rxq, txq, local_addr, rem_addr, tcp_state[state]);
|
||||
"tcp", rxq, txq, l, r, tcp_state[state]);
|
||||
free(l);
|
||||
free(r);
|
||||
}
|
||||
}
|
||||
|
||||
@ -285,14 +270,16 @@ static void udp_do_one(int lnr, const char *line)
|
||||
if ((have_remaddr && (flags & NETSTAT_CONNECTED))
|
||||
|| (!have_remaddr && (flags & NETSTAT_LISTENING))
|
||||
) {
|
||||
snprint_ip_port(local_addr, sizeof(local_addr),
|
||||
char *l = ip_port_str(
|
||||
(struct sockaddr *) &localaddr, local_port,
|
||||
"udp", flags & NETSTAT_NUMERIC);
|
||||
snprint_ip_port(rem_addr, sizeof(rem_addr),
|
||||
char *r = ip_port_str(
|
||||
(struct sockaddr *) &remaddr, rem_port,
|
||||
"udp", flags & NETSTAT_NUMERIC);
|
||||
printf(net_conn_line,
|
||||
"udp", rxq, txq, local_addr, rem_addr, state_str);
|
||||
"udp", rxq, txq, l, r, state_str);
|
||||
free(l);
|
||||
free(r);
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -339,14 +326,16 @@ static void raw_do_one(int lnr, const char *line)
|
||||
if ((have_remaddr && (flags & NETSTAT_CONNECTED))
|
||||
|| (!have_remaddr && (flags & NETSTAT_LISTENING))
|
||||
) {
|
||||
snprint_ip_port(local_addr, sizeof(local_addr),
|
||||
char *l = ip_port_str(
|
||||
(struct sockaddr *) &localaddr, local_port,
|
||||
"raw", flags & NETSTAT_NUMERIC);
|
||||
snprint_ip_port(rem_addr, sizeof(rem_addr),
|
||||
char *r = ip_port_str(
|
||||
(struct sockaddr *) &remaddr, rem_port,
|
||||
"raw", flags & NETSTAT_NUMERIC);
|
||||
printf(net_conn_line,
|
||||
"raw", rxq, txq, local_addr, rem_addr, itoa(state));
|
||||
"raw", rxq, txq, l, r, itoa(state));
|
||||
free(l);
|
||||
free(r);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -478,7 +478,7 @@ static void set_flags(char *flagstr, int flags)
|
||||
/* also used in netstat */
|
||||
void bb_displayroutes(int noresolve, int netstatfmt)
|
||||
{
|
||||
char devname[64], flags[16], sdest[16], sgw[16];
|
||||
char devname[64], flags[16], *sdest, *sgw;
|
||||
unsigned long d, g, m;
|
||||
int flgs, ref, use, metric, mtu, win, ir;
|
||||
struct sockaddr_in s_addr;
|
||||
@ -520,15 +520,14 @@ void bb_displayroutes(int noresolve, int netstatfmt)
|
||||
memset(&s_addr, 0, sizeof(struct sockaddr_in));
|
||||
s_addr.sin_family = AF_INET;
|
||||
s_addr.sin_addr.s_addr = d;
|
||||
INET_rresolve(sdest, sizeof(sdest), &s_addr,
|
||||
(noresolve | 0x8000), m); /* Default instead of *. */
|
||||
|
||||
sdest = INET_rresolve(&s_addr, (noresolve | 0x8000), m); /* 'default' instead of '*' */
|
||||
s_addr.sin_addr.s_addr = g;
|
||||
INET_rresolve(sgw, sizeof(sgw), &s_addr,
|
||||
(noresolve | 0x4000), m); /* Host instead of net. */
|
||||
|
||||
sgw = INET_rresolve(&s_addr, (noresolve | 0x4000), m); /* Host instead of net */
|
||||
mask.s_addr = m;
|
||||
printf("%-16s%-16s%-16s%-6s", sdest, sgw, inet_ntoa(mask), flags);
|
||||
/* "%15.15s" truncates hostnames, do we really want that? */
|
||||
printf("%-15.15s %-15.15s %-16s%-6s", sdest, sgw, inet_ntoa(mask), flags);
|
||||
free(sdest);
|
||||
free(sgw);
|
||||
if (netstatfmt) {
|
||||
printf("%5d %-5d %6d %s\n", mtu, win, ir, devname);
|
||||
} else {
|
||||
@ -541,7 +540,7 @@ void bb_displayroutes(int noresolve, int netstatfmt)
|
||||
|
||||
static void INET6_displayroutes(int noresolve)
|
||||
{
|
||||
char addr6[128], naddr6[128];
|
||||
char addr6[128], *naddr6;
|
||||
/* In addr6x, we store both 40-byte ':'-delimited ipv6 addresses.
|
||||
* We read the non-delimited strings into the tail of the buffer
|
||||
* using fscanf and then modify the buffer by shifting forward
|
||||
@ -581,7 +580,7 @@ static void INET6_displayroutes(int noresolve)
|
||||
|
||||
do {
|
||||
if (!*p) {
|
||||
if (i==40) { /* nul terminator for 1st address? */
|
||||
if (i == 40) { /* nul terminator for 1st address? */
|
||||
addr6x[39] = 0; /* Fixup... need 0 instead of ':'. */
|
||||
++p; /* Skip and continue. */
|
||||
continue;
|
||||
@ -606,18 +605,19 @@ static void INET6_displayroutes(int noresolve)
|
||||
inet_pton(AF_INET6, addr6x + r,
|
||||
(struct sockaddr *) &snaddr6.sin6_addr);
|
||||
snaddr6.sin6_family = AF_INET6;
|
||||
INET6_rresolve(naddr6, sizeof(naddr6),
|
||||
(struct sockaddr_in6 *) &snaddr6,
|
||||
naddr6 = INET6_rresolve((struct sockaddr_in6 *) &snaddr6,
|
||||
0x0fff /* Apparently, upstream never resolves. */
|
||||
);
|
||||
|
||||
if (!r) { /* 1st pass */
|
||||
snprintf(addr6, sizeof(addr6), "%s/%d", naddr6, prefix_len);
|
||||
r += 40;
|
||||
free(naddr6);
|
||||
} else { /* 2nd pass */
|
||||
/* Print the info. */
|
||||
printf("%-43s %-39s %-5s %-6d %-2d %7d %-8s\n",
|
||||
addr6, naddr6, flags, metric, refcnt, use, iface);
|
||||
addr6, naddr6, flags, metric, refcnt, use, iface);
|
||||
free(naddr6);
|
||||
break;
|
||||
}
|
||||
} while (1);
|
||||
|
||||
@ -802,22 +802,20 @@ packet_ok(unsigned char *buf, int cc, struct sockaddr_in *from, int seq)
|
||||
* numeric value, otherwise try for symbolic name.
|
||||
*/
|
||||
static inline void
|
||||
inetname(struct sockaddr_in *from)
|
||||
print_inetname(struct sockaddr_in *from)
|
||||
{
|
||||
const char *n = NULL;
|
||||
const char *ina;
|
||||
char name[257];
|
||||
|
||||
if (!nflag && from->sin_addr.s_addr != INADDR_ANY) {
|
||||
if (INET_rresolve(name, sizeof(name), from, 0x4000,
|
||||
0xffffffff) >= 0)
|
||||
n = name;
|
||||
}
|
||||
ina = inet_ntoa(from->sin_addr);
|
||||
if (nflag)
|
||||
printf(" %s", ina);
|
||||
else
|
||||
else {
|
||||
char *n = NULL;
|
||||
if (from->sin_addr.s_addr != INADDR_ANY)
|
||||
n = xmalloc_sockaddr2host_noport((struct sockaddr*)from, sizeof(*from));
|
||||
printf(" %s (%s)", (n ? n : ina), ina);
|
||||
free(n);
|
||||
}
|
||||
}
|
||||
|
||||
static inline void
|
||||
@ -830,7 +828,7 @@ print(unsigned char *buf, int cc, struct sockaddr_in *from)
|
||||
hlen = ip->ip_hl << 2;
|
||||
cc -= hlen;
|
||||
|
||||
inetname(from);
|
||||
print_inetname(from);
|
||||
#if ENABLE_FEATURE_TRACEROUTE_VERBOSE
|
||||
if (verbose)
|
||||
printf(" %d bytes to %s", cc, inet_ntoa(ip->ip_dst));
|
||||
|
||||
Loading…
Reference in New Issue
Block a user