C++ rt_addr_n2a函数代码示例

void xfrm_selector_print(struct xfrm_selector *sel, __u16 family,
			 FILE *fp, const char *prefix)
{
	char abuf[256];
	__u16 f;

	f = sel->family;
	if (f == AF_UNSPEC)
		f = family;
	if (f == AF_UNSPEC)
		f = preferred_family;

	if (prefix)
		fprintf(fp, prefix);

	memset(abuf, '\0', sizeof(abuf));
	fprintf(fp, "src %s/%u ", rt_addr_n2a(f, sizeof(sel->saddr),
					      &sel->saddr, abuf, sizeof(abuf)),
		sel->prefixlen_s);

	memset(abuf, '\0', sizeof(abuf));
	fprintf(fp, "dst %s/%u ", rt_addr_n2a(f, sizeof(sel->daddr),
					      &sel->daddr, abuf, sizeof(abuf)),
		sel->prefixlen_d);

	if (sel->proto)
		fprintf(fp, "proto %s ", strxf_proto(sel->proto));
	switch (sel->proto) {
	case IPPROTO_TCP:
	case IPPROTO_UDP:
	case IPPROTO_SCTP:
	default: /* XXX */
		if (sel->sport_mask)
			fprintf(fp, "sport %u ", ntohs(sel->sport));
		if (sel->dport_mask)
			fprintf(fp, "dport %u ", ntohs(sel->dport));
		break;
	case IPPROTO_ICMP:
	case IPPROTO_ICMPV6:
		/* type/code is stored at sport/dport in selector */
		if (sel->sport_mask)
			fprintf(fp, "type %u ", ntohs(sel->sport));
		if (sel->dport_mask)
			fprintf(fp, "code %u ", ntohs(sel->dport));
		break;
	}

	if (sel->ifindex > 0) {
		char buf[IFNAMSIZ];

		memset(buf, '\0', sizeof(buf));
		if_indextoname(sel->ifindex, buf);
		fprintf(fp, "dev %s ", buf);
	}

	if (show_stats > 0)
		fprintf(fp, "uid %u", sel->user);

	fprintf(fp, "%s", _SL_);
}

static int xfrm_ae_print(const struct sockaddr_nl *who,
			     struct nlmsghdr *n, void *arg)
{
	FILE *fp = (FILE*)arg;
	struct xfrm_aevent_id *id = NLMSG_DATA(n);
	char abuf[256];

	fprintf(fp, "Async event ");
	xfrm_ae_flags_print(id->flags, arg);
	fprintf(fp,"\n\t");
	memset(abuf, '\0', sizeof(abuf));
	fprintf(fp, "src %s ", rt_addr_n2a(id->sa_id.family,
		sizeof(id->saddr), &id->saddr,
		abuf, sizeof(abuf)));
	memset(abuf, '\0', sizeof(abuf));
	fprintf(fp, "dst %s ", rt_addr_n2a(id->sa_id.family,
		sizeof(id->sa_id.daddr), &id->sa_id.daddr,
		abuf, sizeof(abuf)));
	fprintf(fp, " reqid 0x%x", id->reqid);
	fprintf(fp, " protocol %s ", strxf_proto(id->sa_id.proto));
	fprintf(fp, " SPI 0x%x", ntohl(id->sa_id.spi));

	fprintf(fp, "\n");
	fflush(fp);

	return 0;
}

void xfrm_id_info_print(xfrm_address_t *saddr, struct xfrm_id *id,
			__u8 mode, __u32 reqid, __u16 family, int force_spi,
			FILE *fp, const char *prefix, const char *title)
{
	char abuf[256];

	if (title)
		fputs(title, fp);

	memset(abuf, '\0', sizeof(abuf));
	fprintf(fp, "src %s ", rt_addr_n2a(family, sizeof(*saddr),
					   saddr, abuf, sizeof(abuf)));
	memset(abuf, '\0', sizeof(abuf));
	fprintf(fp, "dst %s", rt_addr_n2a(family, sizeof(id->daddr),
					  &id->daddr, abuf, sizeof(abuf)));
	fprintf(fp, "%s", _SL_);

	if (prefix)
		fputs(prefix, fp);
	fprintf(fp, "\t");

	fprintf(fp, "proto %s ", strxf_xfrmproto(id->proto));

	if (show_stats > 0 || force_spi || id->spi) {
		__u32 spi = ntohl(id->spi);
		fprintf(fp, "spi 0x%08x", spi);
		if (show_stats > 0)
			fprintf(fp, "(%u)", spi);
		fprintf(fp, " ");
	}

	fprintf(fp, "reqid %u", reqid);
	if (show_stats > 0)
		fprintf(fp, "(0x%08x)", reqid);
	fprintf(fp, " ");

	fprintf(fp, "mode ");
	switch (mode) {
	case XFRM_MODE_TRANSPORT:
		fprintf(fp, "transport");
		break;
	case XFRM_MODE_TUNNEL:
		fprintf(fp, "tunnel");
		break;
	case XFRM_MODE_ROUTEOPTIMIZATION:
		fprintf(fp, "ro");
		break;
	case XFRM_MODE_IN_TRIGGER:
		fprintf(fp, "in_trigger");
		break;
	case XFRM_MODE_BEET:
		fprintf(fp, "beet");
		break;
	default:
		fprintf(fp, "%u", mode);
		break;
	}
	fprintf(fp, "%s", _SL_);
}

void xfrm_id_info_print(xfrm_address_t *saddr, struct xfrm_id *id,
			__u8 mode, __u32 reqid, __u16 family, int force_spi,
			FILE *fp, const char *prefix, const char *title)
{
	char abuf[256];

	if (title)
		fprintf(fp, title);

	memset(abuf, '\0', sizeof(abuf));
	fprintf(fp, "src %s ", rt_addr_n2a(family, sizeof(*saddr),
					   saddr, abuf, sizeof(abuf)));
	memset(abuf, '\0', sizeof(abuf));
	fprintf(fp, "dst %s", rt_addr_n2a(family, sizeof(id->daddr),
					  &id->daddr, abuf, sizeof(abuf)));
	fprintf(fp, "%s", _SL_);

	if (prefix)
		fprintf(fp, prefix);
	fprintf(fp, "\t");

	fprintf(fp, "proto %s ", strxf_xfrmproto(id->proto));

	if (show_stats > 0 || force_spi || id->spi) {
		__u32 spi = ntohl(id->spi);
		fprintf(fp, "spi 0x%08x", spi);
		if (show_stats > 0)
			fprintf(fp, "(%u)", spi);
		fprintf(fp, " ");
	}

	fprintf(fp, "reqid %u", reqid);
	if (show_stats > 0)
		fprintf(fp, "(0x%08x)", reqid);
	fprintf(fp, " ");

	fprintf(fp, "mode ");
	switch (mode) {
	case 0:
		fprintf(fp, "transport");
		break;
	case 1:
		fprintf(fp, "tunnel");
		break;
	default:
		fprintf(fp, "%u", mode);
		break;
	}
	fprintf(fp, "%s", _SL_);
}

const char *format_host(int af, int len, void *addr, char *buf, int buflen)
{
	if (resolve_hosts) {
		struct hostent *h_ent;

		if (len <= 0) {
			switch (af) {
			case AF_INET:
				len = 4;
				break;
			case AF_INET6:
				len = 16;
				break;
			default:;
			}
		}
		if (len > 0) {
			h_ent = gethostbyaddr(addr, len, af);
			if (h_ent != NULL) {
				safe_strncpy(buf, h_ent->h_name, buflen);
				return buf;
			}
		}
	}
	return rt_addr_n2a(af, addr, buf, buflen);
}

const char *format_host(int af, int len, const void *addr,
			char *buf, int buflen)
{
#ifdef RESOLVE_HOSTNAMES
	if (resolve_hosts) {
		const char *n;

		if (len <= 0) {
			switch (af) {
			case AF_INET:
				len = 4;
				break;
			case AF_INET6:
				len = 16;
				break;
			case AF_IPX:
				len = 10;
				break;
#ifdef AF_DECnet
			/* I see no reasons why gethostbyname
			   may not work for DECnet */
			case AF_DECnet:
				len = 2;
				break;
#endif
			default: ;
			}
		}
		if (len > 0 &&
		    (n = resolve_address(addr, len, af)) != NULL)
			return n;
	}
#endif
	return rt_addr_n2a(af, len, addr, buf, buflen);
}

static void xfrm_print_addr(FILE *fp, int family, xfrm_address_t *a)
{
	char buf[256];

	buf[0] = 0;
	fprintf(fp, "%s", rt_addr_n2a(family, sizeof(*a), a, buf, sizeof(buf)));
}

const char *format_host(int af, int len, void *addr, char *buf, int buflen)
{
#ifdef RESOLVE_HOSTNAMES
	if (resolve_hosts) {
		struct hostent *h_ent;
		if (len <= 0) {
			switch (af) {
			case AF_INET:
				len = 4;
				break;
			case AF_INET6:
				len = 16;
				break;
			case AF_IPX:
				len = 10;
				break;
#ifdef AF_DECnet
			/* I see no reasons why gethostbyname
			   may not work for DECnet */
			case AF_DECnet:
				len = 2;
				break;
#endif
			default: ;
			}
		}
		if (len > 0 &&
		    (h_ent = gethostbyaddr(addr, len, af)) != NULL) {
			snprintf(buf, buflen-1, "%s", h_ent->h_name);
			return buf;
		}
	}
#endif
	return rt_addr_n2a(af, len, addr, buf, buflen);
}

boost::asio::ip::address_v6 get_ipv6_address(const nlmsghdr *in, const nlmsghdr *an)
{
	boost::asio::ip::address_v6 unspec;
	if (in->nlmsg_type != RTM_NEWLINK)
		return unspec;
	if (an->nlmsg_type != RTM_NEWADDR)
		return unspec;

	ifinfomsg* ifi = (ifinfomsg*)NLMSG_DATA(in);
	ifaddrmsg* ifa = (ifaddrmsg*)NLMSG_DATA(an);

	__u32 ilen = in->nlmsg_len;
	if (ilen < NLMSG_LENGTH(sizeof(*ifi)))
		return unspec;
	ilen -= NLMSG_LENGTH(sizeof(*ifi));

	__u32 alen = an->nlmsg_len;
	if (alen < NLMSG_LENGTH(sizeof(*ifa)))
		return unspec;
	alen -= NLMSG_LENGTH(sizeof(*ifa));

	/* NOTE: ifi_index and ifa_index should have the same type (int), but for
	 * some reason they are not... So instead of a normal (in)equality comparison
	 * we do a bit-wise compare.
	 */
	if (ifi->ifi_index ^ ifa->ifa_index)
		return unspec;

	if (ifi->ifi_family != AF_INET6 || ifa->ifa_family != AF_INET6)
		return unspec;

	rtattr* tbi[IFLA_MAX+1];
	memset(tbi, 0, sizeof(tbi));
	parse_rtattr(tbi, IFLA_MAX, IFLA_RTA(ifi), ilen);

	if (tbi[IFLA_IFNAME] == NULL)
		return unspec;

	rtattr* tba[IFA_MAX+1];
	memset(tba, 0, sizeof(tba));
	parse_rtattr(tba, IFA_MAX, IFA_RTA(ifa), alen);

	char abuf[256];
	rt_addr_n2a(ifa->ifa_family,
			RTA_PAYLOAD(tba[IFA_ADDRESS]),
			RTA_DATA(tba[IFA_ADDRESS]),
			abuf, sizeof(abuf));
	std::string ipaddr = abuf;

	try {
		boost::asio::ip::address_v6 addr(boost::asio::ip::address_v6::from_string(ipaddr));
		addr.scope_id(ifi->ifi_index);
		return addr;
	} catch(...) {
		return unspec;
	}
}

static void xfrm_usersa_print(const struct xfrm_usersa_id *sa_id, __u32 reqid, FILE *fp)
{
	fprintf(fp, "dst %s ",
		rt_addr_n2a(sa_id->family, sizeof(sa_id->daddr), &sa_id->daddr));

	fprintf(fp, " reqid 0x%x", reqid);

	fprintf(fp, " protocol %s ", strxf_proto(sa_id->proto));
	fprintf(fp, " SPI 0x%x", ntohl(sa_id->spi));
}

const char *format_host(int af, int len, const void *addr,
			char *buf, int buflen)
{
#ifdef RESOLVE_HOSTNAMES
	if (resolve_hosts) {
		const char *n;

		len = len <= 0 ? af_byte_len(af) : len;

		if (len > 0 &&
		    (n = resolve_address(addr, len, af)) != NULL)
			return n;
	}
#endif
	return rt_addr_n2a(af, len, addr, buf, buflen);
}

static int xfrm_ae_print(struct nlmsghdr *n, void *arg)
{
	FILE *fp = (FILE *)arg;
	struct xfrm_aevent_id *id = NLMSG_DATA(n);

	fprintf(fp, "Async event ");
	xfrm_ae_flags_print(id->flags, arg);
	fprintf(fp, "\n\t");
	fprintf(fp, "src %s ", rt_addr_n2a(id->sa_id.family,
					   sizeof(id->saddr), &id->saddr));

	xfrm_usersa_print(&id->sa_id, id->reqid, fp);

	fprintf(fp, "\n");
	fflush(fp);

	return 0;
}

static int xfrm_ae_print(const struct sockaddr_nl *who,
			     struct nlmsghdr *n, void *arg)
{
	FILE *fp = (FILE*)arg;
	struct xfrm_aevent_id *id = NLMSG_DATA(n);
	char abuf[256];

	fprintf(fp, "Async event ");
	xfrm_ae_flags_print(id->flags, arg);
	fprintf(fp,"\n\t");
	memset(abuf, '\0', sizeof(abuf));
	fprintf(fp, "src %s ", rt_addr_n2a(id->sa_id.family,
					   sizeof(id->saddr), &id->saddr,
					   abuf, sizeof(abuf)));

	xfrm_usersa_print(&id->sa_id, id->reqid, fp);

	fprintf(fp, "\n");
	fflush(fp);

	return 0;
}

void xfrm_xfrma_print(struct rtattr *tb[], __u16 family,
		      FILE *fp, const char *prefix)
{
	if (tb[XFRMA_MARK]) {
		struct rtattr *rta = tb[XFRMA_MARK];
		struct xfrm_mark *m = (struct xfrm_mark *) RTA_DATA(rta);
		fprintf(fp, "\tmark %d/0x%x\n", m->v, m->m);
	}

	if (tb[XFRMA_ALG_AUTH]) {
		struct rtattr *rta = tb[XFRMA_ALG_AUTH];
		xfrm_algo_print((struct xfrm_algo *) RTA_DATA(rta),
				XFRMA_ALG_AUTH, RTA_PAYLOAD(rta), fp, prefix);
	}

	if (tb[XFRMA_ALG_AEAD]) {
		struct rtattr *rta = tb[XFRMA_ALG_AEAD];
		xfrm_aead_print((struct xfrm_algo_aead *)RTA_DATA(rta),
				RTA_PAYLOAD(rta), fp, prefix);
	}

	if (tb[XFRMA_ALG_CRYPT]) {
		struct rtattr *rta = tb[XFRMA_ALG_CRYPT];
		xfrm_algo_print((struct xfrm_algo *) RTA_DATA(rta),
				XFRMA_ALG_CRYPT, RTA_PAYLOAD(rta), fp, prefix);
	}

	if (tb[XFRMA_ALG_COMP]) {
		struct rtattr *rta = tb[XFRMA_ALG_COMP];
		xfrm_algo_print((struct xfrm_algo *) RTA_DATA(rta),
				XFRMA_ALG_COMP, RTA_PAYLOAD(rta), fp, prefix);
	}

	if (tb[XFRMA_ENCAP]) {
		struct xfrm_encap_tmpl *e;
		char abuf[256];

		if (prefix)
			fputs(prefix, fp);
		fprintf(fp, "encap ");

		if (RTA_PAYLOAD(tb[XFRMA_ENCAP]) < sizeof(*e)) {
			fprintf(fp, "(ERROR truncated)");
			fprintf(fp, "%s", _SL_);
			return;
		}
		e = (struct xfrm_encap_tmpl *) RTA_DATA(tb[XFRMA_ENCAP]);

		fprintf(fp, "type ");
		switch (e->encap_type) {
		case 1:
			fprintf(fp, "espinudp-nonike ");
			break;
		case 2:
			fprintf(fp, "espinudp ");
			break;
		default:
			fprintf(fp, "%u ", e->encap_type);
			break;
		}
		fprintf(fp, "sport %u ", ntohs(e->encap_sport));
		fprintf(fp, "dport %u ", ntohs(e->encap_dport));

		memset(abuf, '\0', sizeof(abuf));
		fprintf(fp, "addr %s",
			rt_addr_n2a(family, sizeof(e->encap_oa),
				    &e->encap_oa, abuf, sizeof(abuf)));
		fprintf(fp, "%s", _SL_);
	}

	if (tb[XFRMA_TMPL]) {
		struct rtattr *rta = tb[XFRMA_TMPL];
		xfrm_tmpl_print((struct xfrm_user_tmpl *) RTA_DATA(rta),
				RTA_PAYLOAD(rta), family, fp, prefix);
	}

	if (tb[XFRMA_COADDR]) {
		char abuf[256];
		xfrm_address_t *coa;

		if (prefix)
			fputs(prefix, fp);
		fprintf(fp, "coa ");

		coa = (xfrm_address_t *)RTA_DATA(tb[XFRMA_COADDR]);

		if (RTA_PAYLOAD(tb[XFRMA_COADDR]) < sizeof(*coa)) {
			fprintf(fp, "(ERROR truncated)");
			fprintf(fp, "%s", _SL_);
			return;
		}

		memset(abuf, '\0', sizeof(abuf));
		fprintf(fp, "%s",
			rt_addr_n2a(family, sizeof(*coa), coa,
				    abuf, sizeof(abuf)));
		fprintf(fp, "%s", _SL_);
	}

	if (tb[XFRMA_LASTUSED]) {
//.........这里部分代码省略.........

int print_addrinfo(const struct sockaddr_nl *who, struct nlmsghdr *n,
		   void *arg)
{
	FILE *fp = (FILE*)arg;
	struct ifaddrmsg *ifa = NLMSG_DATA(n);
	int len = n->nlmsg_len;
	int deprecated = 0;
	/* Use local copy of ifa_flags to not interfere with filtering code */
	unsigned int ifa_flags;
	struct rtattr * rta_tb[IFA_MAX+1];
	char abuf[256];
	SPRINT_BUF(b1);

	if (n->nlmsg_type != RTM_NEWADDR && n->nlmsg_type != RTM_DELADDR)
		return 0;
	len -= NLMSG_LENGTH(sizeof(*ifa));
	if (len < 0) {
		fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
		return -1;
	}

	if (filter.flushb && n->nlmsg_type != RTM_NEWADDR)
		return 0;

	parse_rtattr(rta_tb, IFA_MAX, IFA_RTA(ifa), n->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa)));

	if (!rta_tb[IFA_LOCAL])
		rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
	if (!rta_tb[IFA_ADDRESS])
		rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL];

	if (filter.ifindex && filter.ifindex != ifa->ifa_index)
		return 0;
	if ((filter.scope^ifa->ifa_scope)&filter.scopemask)
		return 0;
	if ((filter.flags^ifa->ifa_flags)&filter.flagmask)
		return 0;
	if (filter.label) {
		SPRINT_BUF(b1);
		const char *label;
		if (rta_tb[IFA_LABEL])
			label = RTA_DATA(rta_tb[IFA_LABEL]);
		else
			label = ll_idx_n2a(ifa->ifa_index, b1);
		if (fnmatch(filter.label, label, 0) != 0)
			return 0;
	}
	if (filter.pfx.family) {
		if (rta_tb[IFA_LOCAL]) {
			inet_prefix dst;
			memset(&dst, 0, sizeof(dst));
			dst.family = ifa->ifa_family;
			memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL]));
			if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
				return 0;
		}
	}

	if (filter.family && filter.family != ifa->ifa_family)
		return 0;

	if (filter.flushb) {
		struct nlmsghdr *fn;
		if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
			if (flush_update())
				return -1;
		}
		fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp));
		memcpy(fn, n, n->nlmsg_len);
		fn->nlmsg_type = RTM_DELADDR;
		fn->nlmsg_flags = NLM_F_REQUEST;
		fn->nlmsg_seq = ++rth.seq;
		filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
		filter.flushed++;
		if (show_stats < 2)
			return 0;
	}

	if (n->nlmsg_type == RTM_DELADDR)
		fprintf(fp, "Deleted ");

	if (filter.oneline || filter.flushb)
		fprintf(fp, "%u: %s", ifa->ifa_index, ll_index_to_name(ifa->ifa_index));
	if (ifa->ifa_family == AF_INET)
		fprintf(fp, "    inet ");
	else if (ifa->ifa_family == AF_INET6)
		fprintf(fp, "    inet6 ");
	else if (ifa->ifa_family == AF_DECnet)
		fprintf(fp, "    dnet ");
	else if (ifa->ifa_family == AF_IPX)
		fprintf(fp, "     ipx ");
	else
		fprintf(fp, "    family %d ", ifa->ifa_family);

	if (rta_tb[IFA_LOCAL]) {
		fprintf(fp, "%s", rt_addr_n2a(ifa->ifa_family,
					      RTA_PAYLOAD(rta_tb[IFA_LOCAL]),
					      RTA_DATA(rta_tb[IFA_LOCAL]),
					      abuf, sizeof(abuf)));

//.........这里部分代码省略.........