networking/libiproute/*: code shrink by optimizing numeric conversions

 and other misc stuff

function                                             old     new   delta
print_tunnel                                         660     656      -4
format_host                                            5       -      -5
get_unsigned                                          70      54     -16
get_u32                                               70      54     -16
do_iplink                                           1173    1151     -22
get_prefix                                           417     393     -24
print_rule                                           800     771     -29
print_addrinfo                                      1374    1342     -32
print_route                                         1745    1709     -36
iprule_modify                                        905     866     -39
iproute_modify                                      1105    1048     -57
get_integer                                           70       -     -70
parse_args                                          1684    1440    -244
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 0/11 up/down: 0/-594)          Total: -594 bytes
   text    data     bss     dec     hex filename
 817378     476    7892  825746   c9992 busybox_old
 816784     476    7892  825152   c9740 busybox_unstripped

8 files changed, 60 insertions, 135 deletions

diff --git a/networking/libiproute/ipaddress.c b/networking/libiproute/ipaddress.c
index fadab6f39..644874f46 100644
--- a/networking/libiproute/ipaddress.c
+++ b/networking/libiproute/ipaddress.c
@@ -280,17 +280,16 @@ static int print_addrinfo(const struct sockaddr_nl *who UNUSED_PARAM,
 
 	if (rta_tb[IFA_LOCAL]) {
 		fputs(rt_addr_n2a(ifa->ifa_family,
-					      RTA_PAYLOAD(rta_tb[IFA_LOCAL]),
 					      RTA_DATA(rta_tb[IFA_LOCAL]),
 					      abuf, sizeof(abuf)), stdout);
 
-		if (rta_tb[IFA_ADDRESS] == NULL ||
-		    memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0) {
+		if (rta_tb[IFA_ADDRESS] == NULL
+		 || memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0
+		) {
 			printf("/%d ", ifa->ifa_prefixlen);
 		} else {
 			printf(" peer %s/%d ",
 				rt_addr_n2a(ifa->ifa_family,
-					    RTA_PAYLOAD(rta_tb[IFA_ADDRESS]),
 					    RTA_DATA(rta_tb[IFA_ADDRESS]),
 					    abuf, sizeof(abuf)),
 				ifa->ifa_prefixlen);
@@ -300,14 +299,12 @@ static int print_addrinfo(const struct sockaddr_nl *who UNUSED_PARAM,
 	if (rta_tb[IFA_BROADCAST]) {
 		printf("brd %s ",
 			rt_addr_n2a(ifa->ifa_family,
-				    RTA_PAYLOAD(rta_tb[IFA_BROADCAST]),
 				    RTA_DATA(rta_tb[IFA_BROADCAST]),
 				    abuf, sizeof(abuf)));
 	}
 	if (rta_tb[IFA_ANYCAST]) {
 		printf("any %s ",
 			rt_addr_n2a(ifa->ifa_family,
-				    RTA_PAYLOAD(rta_tb[IFA_ANYCAST]),
 				    RTA_DATA(rta_tb[IFA_ANYCAST]),
 				    abuf, sizeof(abuf)));
 	}
diff --git a/networking/libiproute/iplink.c b/networking/libiproute/iplink.c
index d3d0338b0..1e7ee07d2 100644
--- a/networking/libiproute/iplink.c
+++ b/networking/libiproute/iplink.c
@@ -202,8 +202,7 @@ static int do_set(char **argv)
 			NEXT_ARG();
 			if (mtu != -1)
 				duparg("mtu", *argv);
-			if (get_integer(&mtu, *argv, 0))
-				invarg(*argv, "mtu");
+			mtu = get_unsigned(*argv, "mtu");
 		}
 		if (key == ARG_multicast) {
 			int param;
diff --git a/networking/libiproute/iproute.c b/networking/libiproute/iproute.c
index a7ec66c7f..66557d8fd 100644
--- a/networking/libiproute/iproute.c
+++ b/networking/libiproute/iproute.c
@@ -202,7 +202,6 @@ static int print_route(const struct sockaddr_nl *who UNUSED_PARAM,
 	if (tb[RTA_DST]) {
 		if (r->rtm_dst_len != host_len) {
 			printf("%s/%u ", rt_addr_n2a(r->rtm_family,
-						RTA_PAYLOAD(tb[RTA_DST]),
 						RTA_DATA(tb[RTA_DST]),
 						abuf, sizeof(abuf)),
 					r->rtm_dst_len
@@ -222,7 +221,6 @@ static int print_route(const struct sockaddr_nl *who UNUSED_PARAM,
 	if (tb[RTA_SRC]) {
 		if (r->rtm_src_len != host_len) {
 			printf("from %s/%u ", rt_addr_n2a(r->rtm_family,
-						RTA_PAYLOAD(tb[RTA_SRC]),
 						RTA_DATA(tb[RTA_SRC]),
 						abuf, sizeof(abuf)),
 					r->rtm_src_len
@@ -252,7 +250,6 @@ static int print_route(const struct sockaddr_nl *who UNUSED_PARAM,
 		   and symbolic name will not be useful.
 		 */
 		printf(" src %s ", rt_addr_n2a(r->rtm_family,
-					RTA_PAYLOAD(tb[RTA_PREFSRC]),
 					RTA_DATA(tb[RTA_PREFSRC]),
 					abuf, sizeof(abuf)));
 	}
@@ -367,8 +364,7 @@ USE_FEATURE_IP_RULE(ARG_table,)
 				mxlock |= (1 << RTAX_MTU);
 				NEXT_ARG();
 			}
-			if (get_unsigned(&mtu, *argv, 0))
-				invarg(*argv, "mtu");
+			mtu = get_unsigned(*argv, "mtu");
 			rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
 		} else if (arg == ARG_protocol) {
 			uint32_t prot;
@@ -391,8 +387,7 @@ USE_FEATURE_IP_RULE(ARG_table,)
 		} else if (arg == ARG_metric) {
 			uint32_t metric;
 			NEXT_ARG();
-			if (get_u32(&metric, *argv, 0))
-				invarg(*argv, "metric");
+			metric = get_u32(*argv, "metric");
 			addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
 		} else {
 			int type;
diff --git a/networking/libiproute/iprule.c b/networking/libiproute/iprule.c
index ca2254667..6c90c6d21 100644
--- a/networking/libiproute/iprule.c
+++ b/networking/libiproute/iprule.c
@@ -78,7 +78,6 @@ static int print_rule(const struct sockaddr_nl *who UNUSED_PARAM,
 	if (tb[RTA_SRC]) {
 		if (r->rtm_src_len != host_len) {
 			printf("%s/%u", rt_addr_n2a(r->rtm_family,
-							 RTA_PAYLOAD(tb[RTA_SRC]),
 							 RTA_DATA(tb[RTA_SRC]),
 							 abuf, sizeof(abuf)),
 				r->rtm_src_len
@@ -99,7 +98,6 @@ static int print_rule(const struct sockaddr_nl *who UNUSED_PARAM,
 	if (tb[RTA_DST]) {
 		if (r->rtm_dst_len != host_len) {
 			printf("to %s/%u ", rt_addr_n2a(r->rtm_family,
-							 RTA_PAYLOAD(tb[RTA_DST]),
 							 RTA_DATA(tb[RTA_DST]),
 							 abuf, sizeof(abuf)),
 				r->rtm_dst_len
@@ -238,8 +236,7 @@ static int iprule_modify(int cmd, char **argv)
 			   key == ARG_priority) {
 			uint32_t pref;
 			NEXT_ARG();
-			if (get_u32(&pref, *argv, 0))
-				invarg(*argv, "preference");
+			pref = get_u32(*argv, "preference");
 			addattr32(&req.n, sizeof(req), RTA_PRIORITY, pref);
 		} else if (key == ARG_tos) {
 			uint32_t tos;
@@ -250,8 +247,7 @@ static int iprule_modify(int cmd, char **argv)
 		} else if (key == ARG_fwmark) {
 			uint32_t fwmark;
 			NEXT_ARG();
-			if (get_u32(&fwmark, *argv, 0))
-				invarg(*argv, "fwmark");
+			fwmark = get_u32(*argv, "fwmark");
 			addattr32(&req.n, sizeof(req), RTA_PROTOINFO, fwmark);
 		} else if (key == ARG_realms) {
 			uint32_t realm;
diff --git a/networking/libiproute/iptunnel.c b/networking/libiproute/iptunnel.c
index 5349587ae..6a841aadb 100644
--- a/networking/libiproute/iptunnel.c
+++ b/networking/libiproute/iptunnel.c
@@ -232,9 +232,7 @@ static void parse_args(char **argv, int cmd, struct ip_tunnel_parm *p)
 			if (strchr(*argv, '.'))
 				p->i_key = p->o_key = get_addr32(*argv);
 			else {
-				if (get_unsigned(&uval, *argv, 0) < 0) {
-					invarg(*argv, "key");
-				}
+				uval = get_unsigned(*argv, "key");
 				p->i_key = p->o_key = htonl(uval);
 			}
 		} else if (key == ARG_ikey) {
@@ -244,9 +242,7 @@ static void parse_args(char **argv, int cmd, struct ip_tunnel_parm *p)
 			if (strchr(*argv, '.'))
 				p->o_key = get_addr32(*argv);
 			else {
-				if (get_unsigned(&uval, *argv, 0) < 0) {
-					invarg(*argv, "ikey");
-				}
+				uval = get_unsigned(*argv, "ikey");
 				p->i_key = htonl(uval);
 			}
 		} else if (key == ARG_okey) {
@@ -256,9 +252,7 @@ static void parse_args(char **argv, int cmd, struct ip_tunnel_parm *p)
 			if (strchr(*argv, '.'))
 				p->o_key = get_addr32(*argv);
 			else {
-				if (get_unsigned(&uval, *argv, 0) < 0) {
-					invarg(*argv, "okey");
-				}
+				uval = get_unsigned(*argv, "okey");
 				p->o_key = htonl(uval);
 			}
 		} else if (key == ARG_seq) {
@@ -297,8 +291,7 @@ static void parse_args(char **argv, int cmd, struct ip_tunnel_parm *p)
 			NEXT_ARG();
 			key = index_in_strings(keywords, *argv);
 			if (key != ARG_inherit) {
-				if (get_unsigned(&uval, *argv, 0))
-					invarg(*argv, "TTL");
+				uval = get_unsigned(*argv, "TTL");
 				if (uval > 255)
 					invarg(*argv, "TTL must be <=255");
 				p->iph.ttl = uval;
diff --git a/networking/libiproute/ll_proto.c b/networking/libiproute/ll_proto.c
index b8268732e..a93493538 100644
--- a/networking/libiproute/ll_proto.c
+++ b/networking/libiproute/ll_proto.c
@@ -115,13 +115,15 @@ int ll_proto_a2n(unsigned short *id, char *buf)
 	unsigned i;
 	for (i = 0; i < ARRAY_SIZE(llproto_names); i++) {
 		 if (strcasecmp(llproto_names[i].name, buf) == 0) {
-			 *id = htons(llproto_names[i].id);
-			 return 0;
+			 i = llproto_names[i].id;
+			 goto good;
 		 }
 	}
-	if (get_u16(id, buf, 0))
+	i = bb_strtou(buf, NULL, 0);
+	if (errno || i > 0xffff)
 		return -1;
-	*id = htons(*id);
+ good:
+	*id = htons(i);
 	return 0;
 }
 
diff --git a/networking/libiproute/utils.c b/networking/libiproute/utils.c
index 6b9f6a7f5..c84d018eb 100644
--- a/networking/libiproute/utils.c
+++ b/networking/libiproute/utils.c
@@ -15,102 +15,46 @@
 #include "utils.h"
 #include "inet_common.h"
 
-int get_integer(int *val, char *arg, int base)
-{
-	long res;
-	char *ptr;
-
-	if (!arg || !*arg)
-		return -1;
-	res = strtol(arg, &ptr, base);
-	if (!ptr || ptr == arg || *ptr || res > INT_MAX || res < INT_MIN)
-		return -1;
-	*val = res;
-	return 0;
-}
-//XXX: FIXME: use some libbb function instead
-int get_unsigned(unsigned *val, char *arg, int base)
-{
-	unsigned long res;
-	char *ptr;
-
-	if (!arg || !*arg)
-		return -1;
-	res = strtoul(arg, &ptr, base);
-	if (!ptr || ptr == arg || *ptr || res > UINT_MAX)
-		return -1;
-	*val = res;
-	return 0;
-}
-
-int get_u32(uint32_t *val, char *arg, int base)
+unsigned get_unsigned(char *arg, const char *errmsg)
 {
 	unsigned long res;
 	char *ptr;
 
-	if (!arg || !*arg)
-		return -1;
-	res = strtoul(arg, &ptr, base);
-	if (!ptr || ptr == arg || *ptr || res > 0xFFFFFFFFUL)
-		return -1;
-	*val = res;
-	return 0;
+	if (*arg) {
+		res = strtoul(arg, &ptr, 0);
+		if (!*ptr && res <= UINT_MAX) {
+			return res;
+		}
+	}
+	invarg(arg, errmsg); /* does not return */
 }
 
-int get_u16(uint16_t *val, char *arg, int base)
+uint32_t get_u32(char *arg, const char *errmsg)
 {
 	unsigned long res;
 	char *ptr;
 
-	if (!arg || !*arg)
-		return -1;
-	res = strtoul(arg, &ptr, base);
-	if (!ptr || ptr == arg || *ptr || res > 0xFFFF)
-		return -1;
-	*val = res;
-	return 0;
+	if (*arg) {
+		res = strtoul(arg, &ptr, 0);
+		if (!*ptr && res <= 0xFFFFFFFFUL) {
+			return res;
+		}
+	}
+	invarg(arg, errmsg); /* does not return */
 }
 
-int get_u8(uint8_t *val, char *arg, int base)
+uint16_t get_u16(char *arg, const char *errmsg)
 {
 	unsigned long res;
 	char *ptr;
 
-	if (!arg || !*arg)
-		return -1;
-	res = strtoul(arg, &ptr, base);
-	if (!ptr || ptr == arg || *ptr || res > 0xFF)
-		return -1;
-	*val = res;
-	return 0;
-}
-
-int get_s16(int16_t *val, char *arg, int base)
-{
-	long res;
-	char *ptr;
-
-	if (!arg || !*arg)
-		return -1;
-	res = strtol(arg, &ptr, base);
-	if (!ptr || ptr == arg || *ptr || res > 0x7FFF || res < -0x8000)
-		return -1;
-	*val = res;
-	return 0;
-}
-
-int get_s8(int8_t *val, char *arg, int base)
-{
-	long res;
-	char *ptr;
-
-	if (!arg || !*arg)
-		return -1;
-	res = strtol(arg, &ptr, base);
-	if (!ptr || ptr == arg || *ptr || res > 0x7F || res < -0x80)
-		return -1;
-	*val = res;
-	return 0;
+	if (*arg) {
+		res = strtoul(arg, &ptr, 0);
+		if (!*ptr && res <= 0xFFFF) {
+			return res;
+		}
+	}
+	invarg(arg, errmsg); /* does not return */
 }
 
 int get_addr_1(inet_prefix *addr, char *name, int family)
@@ -161,8 +105,8 @@ static int get_prefix_1(inet_prefix *dst, char *arg, int family)
 	 || strcmp(arg, "any") == 0
 	) {
 		dst->family = family;
-		dst->bytelen = 0;
-		dst->bitlen = 0;
+		/*dst->bytelen = 0; - done by memset */
+		/*dst->bitlen = 0;*/
 		return 0;
 	}
 
@@ -176,7 +120,8 @@ static int get_prefix_1(inet_prefix *dst, char *arg, int family)
 			inet_prefix netmask_pfx;
 
 			netmask_pfx.family = AF_UNSPEC;
-			if ((get_unsigned(&plen, slash + 1, 0) || plen > dst->bitlen)
+			plen = bb_strtou(slash + 1, NULL, 0);
+			if ((errno || plen > dst->bitlen)
 			 && (get_addr_1(&netmask_pfx, slash + 1, family)))
 				err = -1;
 			else if (netmask_pfx.family == AF_INET) {
@@ -262,7 +207,7 @@ int inet_addr_match(inet_prefix *a, inet_prefix *b, int bits)
 {
 	uint32_t *a1 = a->data;
 	uint32_t *a2 = b->data;
-	int words = bits >> 0x05;
+	int words = bits >> 5;
 
 	bits &= 0x1f;
 
@@ -286,7 +231,7 @@ int inet_addr_match(inet_prefix *a, inet_prefix *b, int bits)
 	return 0;
 }
 
-const char *rt_addr_n2a(int af, int UNUSED_PARAM len,
+const char *rt_addr_n2a(int af,
 		void *addr, char *buf, int buflen)
 {
 	switch (af) {
@@ -298,9 +243,9 @@ const char *rt_addr_n2a(int af, int UNUSED_PARAM len,
 	}
 }
 
+#ifdef RESOLVE_HOSTNAMES
 const char *format_host(int af, int len, void *addr, char *buf, int buflen)
 {
-#ifdef RESOLVE_HOSTNAMES
 	if (resolve_hosts) {
 		struct hostent *h_ent;
 
@@ -323,6 +268,6 @@ const char *format_host(int af, int len, void *addr, char *buf, int buflen)
 			}
 		}
 	}
-#endif
-	return rt_addr_n2a(af, len, addr, buf, buflen);
+	return rt_addr_n2a(af, addr, buf, buflen);
 }
+#endif
diff --git a/networking/libiproute/utils.h b/networking/libiproute/utils.h
index c1dbc6e8b..3603c75a7 100644
--- a/networking/libiproute/utils.h
+++ b/networking/libiproute/utils.h
@@ -64,19 +64,17 @@ extern int get_addr_1(inet_prefix *dst, char *arg, int family);
 extern int get_addr(inet_prefix *dst, char *arg, int family);
 extern int get_prefix(inet_prefix *dst, char *arg, int family);
 
-extern int get_integer(int *val, char *arg, int base);
-extern int get_unsigned(unsigned *val, char *arg, int base);
-#define get_byte get_u8
-#define get_ushort get_u16
-#define get_short get_s16
-extern int get_u32(uint32_t *val, char *arg, int base);
-extern int get_u16(uint16_t *val, char *arg, int base);
-extern int get_s16(int16_t *val, char *arg, int base);
-extern int get_u8(uint8_t *val, char *arg, int base);
-extern int get_s8(int8_t *val, char *arg, int base);
+extern unsigned get_unsigned(char *arg, const char *errmsg);
+extern uint32_t get_u32(char *arg, const char *errmsg);
+extern uint16_t get_u16(char *arg, const char *errmsg);
 
+extern const char *rt_addr_n2a(int af, void *addr, char *buf, int buflen);
+#ifdef RESOLVE_HOSTNAMES
 extern const char *format_host(int af, int len, void *addr, char *buf, int buflen);
-extern const char *rt_addr_n2a(int af, int len, void *addr, char *buf, int buflen);
+#else
+#define format_host(af, len, addr, buf, buflen) \
+	rt_addr_n2a(af, addr, buf, buflen)
+#endif
 
 void invarg(const char *, const char *) NORETURN;
 void duparg(const char *, const char *) NORETURN;