Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright 2009, Oracle.  All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Convert socket addresses to presentation addresses and universal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * addresses, and vice versa.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Universal addresses are introduced by RFC 1833 and further refined by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * recent RFCs describing NFSv4.  The universal address format is part
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * of the external (network) interface provided by rpcbind version 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * and 4, and by NFSv4.  Such an address is a string containing a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * presentation format IP address followed by a port number in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * "hibyte.lobyte" format.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * IPv6 addresses can also include a scope ID, typically denoted by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * a '%' followed by a device name or a non-negative integer.  Refer to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  * RFC 4291, Section 2.2 for details on IPv6 presentation formats.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <net/ipv6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/sunrpc/addr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/sunrpc/msg_prot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) static size_t rpc_ntop6_noscopeid(const struct sockaddr *sap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 				  char *buf, const int buflen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	const struct in6_addr *addr = &sin6->sin6_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	 * RFC 4291, Section 2.2.2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	 * Shorthanded ANY address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	if (ipv6_addr_any(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		return snprintf(buf, buflen, "::");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	 * RFC 4291, Section 2.2.2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	 * Shorthanded loopback address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	if (ipv6_addr_loopback(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		return snprintf(buf, buflen, "::1");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	 * RFC 4291, Section 2.2.3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	 * Special presentation address format for mapped v4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	 * addresses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	if (ipv6_addr_v4mapped(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		return snprintf(buf, buflen, "::ffff:%pI4",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 					&addr->s6_addr32[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	 * RFC 4291, Section 2.2.1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	return snprintf(buf, buflen, "%pI6c", addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) static size_t rpc_ntop6(const struct sockaddr *sap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 			char *buf, const size_t buflen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	char scopebuf[IPV6_SCOPE_ID_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	size_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	len = rpc_ntop6_noscopeid(sap, buf, buflen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	if (unlikely(len == 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	if (sin6->sin6_scope_id == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	rc = snprintf(scopebuf, sizeof(scopebuf), "%c%u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 			IPV6_SCOPE_DELIMITER, sin6->sin6_scope_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	if (unlikely((size_t)rc >= sizeof(scopebuf)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	len += rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	if (unlikely(len >= buflen))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	strcat(buf, scopebuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) #else	/* !IS_ENABLED(CONFIG_IPV6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) static size_t rpc_ntop6_noscopeid(const struct sockaddr *sap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 				  char *buf, const int buflen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static size_t rpc_ntop6(const struct sockaddr *sap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 			char *buf, const size_t buflen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) #endif	/* !IS_ENABLED(CONFIG_IPV6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static int rpc_ntop4(const struct sockaddr *sap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		     char *buf, const size_t buflen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	const struct sockaddr_in *sin = (struct sockaddr_in *)sap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	return snprintf(buf, buflen, "%pI4", &sin->sin_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)  * rpc_ntop - construct a presentation address in @buf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)  * @sap: socket address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)  * @buf: construction area
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)  * @buflen: size of @buf, in bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)  * Plants a %NUL-terminated string in @buf and returns the length
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)  * of the string, excluding the %NUL.  Otherwise zero is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) size_t rpc_ntop(const struct sockaddr *sap, char *buf, const size_t buflen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	switch (sap->sa_family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	case AF_INET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		return rpc_ntop4(sap, buf, buflen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	case AF_INET6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		return rpc_ntop6(sap, buf, buflen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) EXPORT_SYMBOL_GPL(rpc_ntop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static size_t rpc_pton4(const char *buf, const size_t buflen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 			struct sockaddr *sap, const size_t salen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	struct sockaddr_in *sin = (struct sockaddr_in *)sap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	u8 *addr = (u8 *)&sin->sin_addr.s_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	if (buflen > INET_ADDRSTRLEN || salen < sizeof(struct sockaddr_in))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	memset(sap, 0, sizeof(struct sockaddr_in));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	if (in4_pton(buf, buflen, addr, '\0', NULL) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	sin->sin_family = AF_INET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	return sizeof(struct sockaddr_in);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static int rpc_parse_scope_id(struct net *net, const char *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 			      const size_t buflen, const char *delim,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 			      struct sockaddr_in6 *sin6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	char p[IPV6_SCOPE_ID_LEN + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	size_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	u32 scope_id = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	if ((buf + buflen) == delim)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	if (*delim != IPV6_SCOPE_DELIMITER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	len = (buf + buflen) - delim - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	if (len > IPV6_SCOPE_ID_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	memcpy(p, delim + 1, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	p[len] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	dev = dev_get_by_name(net, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	if (dev != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		scope_id = dev->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		dev_put(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		if (kstrtou32(p, 10, &scope_id) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	sin6->sin6_scope_id = scope_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) static size_t rpc_pton6(struct net *net, const char *buf, const size_t buflen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 			struct sockaddr *sap, const size_t salen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	u8 *addr = (u8 *)&sin6->sin6_addr.in6_u;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	const char *delim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	if (buflen > (INET6_ADDRSTRLEN + IPV6_SCOPE_ID_LEN) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	    salen < sizeof(struct sockaddr_in6))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	memset(sap, 0, sizeof(struct sockaddr_in6));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	if (in6_pton(buf, buflen, addr, IPV6_SCOPE_DELIMITER, &delim) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	if (!rpc_parse_scope_id(net, buf, buflen, delim, sin6))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	sin6->sin6_family = AF_INET6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	return sizeof(struct sockaddr_in6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) static size_t rpc_pton6(struct net *net, const char *buf, const size_t buflen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 			struct sockaddr *sap, const size_t salen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)  * rpc_pton - Construct a sockaddr in @sap
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)  * @net: applicable network namespace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)  * @buf: C string containing presentation format IP address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)  * @buflen: length of presentation address in bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)  * @sap: buffer into which to plant socket address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)  * @salen: size of buffer in bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)  * Returns the size of the socket address if successful; otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)  * zero is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)  * Plants a socket address in @sap and returns the size of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)  * socket address, if successful.  Returns zero if an error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)  * occurred.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) size_t rpc_pton(struct net *net, const char *buf, const size_t buflen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		struct sockaddr *sap, const size_t salen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	for (i = 0; i < buflen; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		if (buf[i] == ':')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 			return rpc_pton6(net, buf, buflen, sap, salen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	return rpc_pton4(buf, buflen, sap, salen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) EXPORT_SYMBOL_GPL(rpc_pton);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)  * rpc_sockaddr2uaddr - Construct a universal address string from @sap.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)  * @sap: socket address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)  * @gfp_flags: allocation mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)  * Returns a %NUL-terminated string in dynamically allocated memory;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)  * otherwise NULL is returned if an error occurred.  Caller must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)  * free the returned string.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) char *rpc_sockaddr2uaddr(const struct sockaddr *sap, gfp_t gfp_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	char portbuf[RPCBIND_MAXUADDRPLEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	char addrbuf[RPCBIND_MAXUADDRLEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	unsigned short port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	switch (sap->sa_family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	case AF_INET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		if (rpc_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 			return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		port = ntohs(((struct sockaddr_in *)sap)->sin_port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	case AF_INET6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 		if (rpc_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 			return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	if (snprintf(portbuf, sizeof(portbuf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		     ".%u.%u", port >> 8, port & 0xff) > (int)sizeof(portbuf))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	if (strlcat(addrbuf, portbuf, sizeof(addrbuf)) > sizeof(addrbuf))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	return kstrdup(addrbuf, gfp_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)  * rpc_uaddr2sockaddr - convert a universal address to a socket address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)  * @net: applicable network namespace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)  * @uaddr: C string containing universal address to convert
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)  * @uaddr_len: length of universal address string
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)  * @sap: buffer into which to plant socket address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)  * @salen: size of buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)  * @uaddr does not have to be '\0'-terminated, but kstrtou8() and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)  * rpc_pton() require proper string termination to be successful.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)  * Returns the size of the socket address if successful; otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)  * zero is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) size_t rpc_uaddr2sockaddr(struct net *net, const char *uaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 			  const size_t uaddr_len, struct sockaddr *sap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 			  const size_t salen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	char *c, buf[RPCBIND_MAXUADDRLEN + sizeof('\0')];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	u8 portlo, porthi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	unsigned short port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	if (uaddr_len > RPCBIND_MAXUADDRLEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	memcpy(buf, uaddr, uaddr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	buf[uaddr_len] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	c = strrchr(buf, '.');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	if (unlikely(c == NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	if (unlikely(kstrtou8(c + 1, 10, &portlo) != 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	*c = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	c = strrchr(buf, '.');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	if (unlikely(c == NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	if (unlikely(kstrtou8(c + 1, 10, &porthi) != 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	port = (unsigned short)((porthi << 8) | portlo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	*c = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	if (rpc_pton(net, buf, strlen(buf), sap, salen) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	switch (sap->sa_family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	case AF_INET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 		((struct sockaddr_in *)sap)->sin_port = htons(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 		return sizeof(struct sockaddr_in);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	case AF_INET6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 		((struct sockaddr_in6 *)sap)->sin6_port = htons(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		return sizeof(struct sockaddr_in6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) EXPORT_SYMBOL_GPL(rpc_uaddr2sockaddr);