--- /dev/null
+/**
+ * @file
+ * DNS - host name to IP address resolver.
+ *
+ */
+
+/**
+
+ * This file implements a DNS host name to IP address resolver.
+
+ * Port to lwIP from uIP
+ * by Jim Pettinato April 2007
+
+ * uIP version Copyright (c) 2002-2003, Adam Dunkels.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * DNS.C
+ *
+ * The lwIP DNS resolver functions are used to lookup a host name and
+ * map it to a numerical IP address. It maintains a list of resolved
+ * hostnames that can be queried with the dns_lookup() function.
+ * New hostnames can be resolved using the dns_query() function.
+ *
+ * The lwIP version of the resolver also adds a non-blocking version of
+ * gethostbyname() that will work with a raw API application. This function
+ * checks for an IP address string first and converts it if it is valid.
+ * gethostbyname() then does a dns_lookup() to see if the name is
+ * already in the table. If so, the IP is returned. If not, a query is
+ * issued and the function returns with a DNS_QUERY_QUEUED status. The app
+ * using the dns client must then go into a waiting state.
+ *
+ * Once a hostname has been resolved (or found to be non-existent),
+ * the resolver code calls a specified callback function (which
+ * must be implemented by the module that uses the resolver).
+ */
+
+/** @todo: define good default values (rfc compliance) */
+/** @todo: secondary server support */
+/** @todo: compressed answer support */
+/** @todo: improve answer parsing, more checkings... */
+/** @todo: possible alignment problems to access to dns_answer fields? */
+
+/*-----------------------------------------------------------------------------
+ * RFC 1035 - Domain names - implementation and specification
+ * RFC 2181 - Clarifications to the DNS Specification
+ *----------------------------------------------------------------------------*/
+
+/*-----------------------------------------------------------------------------
+ * Includes
+ *----------------------------------------------------------------------------*/
+
+#include "lwip/opt.h"
+
+#if LWIP_DNS /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/udp.h"
+#include "lwip/dns.h"
+
+#include <string.h>
+
+/** DNS server IP address */
+#ifndef DNS_SERVER_ADDRESS
+#define DNS_SERVER_ADDRESS inet_addr("208.67.222.222") /* resolver1.opendns.com */
+#endif
+
+/** DNS server port address */
+#ifndef DNS_SERVER_PORT
+#define DNS_SERVER_PORT 53
+#endif
+
+/* The maximum number of table entries to maintain locally */
+#ifndef DNS_TABLE_SIZE
+#define DNS_TABLE_SIZE 4
+#endif
+
+/* The maximum length of a host name supported in the name table. */
+#ifndef DNS_MAX_NAME_LENGTH
+#define DNS_MAX_NAME_LENGTH 256
+#endif
+
+/* The maximum number of retries when asking for a name, before "timeout". */
+#ifndef DNS_MAX_RETRIES
+#define DNS_MAX_RETRIES 8
+#endif
+
+/* DNS entry time to live (in DNS_TMR_INTERVAL ticks) */
+#ifndef DNS_TTL_ENTRY
+#define DNS_TTL_ENTRY 60
+#endif
+
+/* DNS protocol flags */
+#define DNS_FLAG1_RESPONSE 0x80
+#define DNS_FLAG1_OPCODE_STATUS 0x10
+#define DNS_FLAG1_OPCODE_INVERSE 0x08
+#define DNS_FLAG1_OPCODE_STANDARD 0x00
+#define DNS_FLAG1_AUTHORATIVE 0x04
+#define DNS_FLAG1_TRUNC 0x02
+#define DNS_FLAG1_RD 0x01
+#define DNS_FLAG2_RA 0x80
+#define DNS_FLAG2_ERR_MASK 0x0f
+#define DNS_FLAG2_ERR_NONE 0x00
+#define DNS_FLAG2_ERR_NAME 0x03
+
+/* DNS protocol states */
+#define DNS_STATE_UNUSED 0
+#define DNS_STATE_NEW 1
+#define DNS_STATE_ASKING 2
+#define DNS_STATE_DONE 3
+
+/* DNS field TYPE used for "Resource Records" */
+#define DNS_RRTYPE_A 1 /* a host address */
+#define DNS_RRTYPE_NS 2 /* an authoritative name server */
+#define DNS_RRTYPE_MD 3 /* a mail destination (Obsolete - use MX) */
+#define DNS_RRTYPE_MF 4 /* a mail forwarder (Obsolete - use MX) */
+#define DNS_RRTYPE_CNAME 5 /* the canonical name for an alias */
+#define DNS_RRTYPE_SOA 6 /* marks the start of a zone of authority */
+#define DNS_RRTYPE_MB 7 /* a mailbox domain name (EXPERIMENTAL) */
+#define DNS_RRTYPE_MG 8 /* a mail group member (EXPERIMENTAL) */
+#define DNS_RRTYPE_MR 9 /* a mail rename domain name (EXPERIMENTAL) */
+#define DNS_RRTYPE_NULL 10 /* a null RR (EXPERIMENTAL) */
+#define DNS_RRTYPE_WKS 11 /* a well known service description */
+#define DNS_RRTYPE_PTR 12 /* a domain name pointer */
+#define DNS_RRTYPE_HINFO 13 /* host information */
+#define DNS_RRTYPE_MINFO 14 /* mailbox or mail list information */
+#define DNS_RRTYPE_MX 15 /* mail exchange */
+#define DNS_RRTYPE_TXT 16 /* text strings */
+
+/* DNS field CLASS used for "Resource Records" */
+#define DNS_RRCLASS_IN 1 /* the Internet */
+#define DNS_RRCLASS_CS 2 /* the CSNET class (Obsolete - used only for examples in some obsolete RFCs) */
+#define DNS_RRCLASS_CH 3 /* the CHAOS class */
+#define DNS_RRCLASS_HS 4 /* Hesiod [Dyer 87] */
+#define DNS_RRCLASS_FLUSH 0x800 /* Flush bit */
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+# include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+/** DNS message header */
+struct dns_hdr {
+ u16_t id;
+ u8_t flags1;
+ u8_t flags2;
+ u16_t numquestions;
+ u16_t numanswers;
+ u16_t numauthrr;
+ u16_t numextrarr;
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+# include "arch/epstruct.h"
+#endif
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+# include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+/** DNS answer message structure */
+struct dns_answer {
+ /* DNS answer record starts with either a domain name or a pointer
+ to a name already present somewhere in the packet. */
+ u16_t type;
+ u16_t class;
+ u32_t ttl;
+ u16_t len;
+ struct ip_addr ipaddr;
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+# include "arch/epstruct.h"
+#endif
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+# include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+/** DNS table entry */
+struct dns_table_entry {
+ u8_t state;
+ u8_t tmr;
+ u8_t retries;
+ u8_t ttl;
+ u8_t seqno;
+ u8_t err;
+ char name[DNS_MAX_NAME_LENGTH];
+ struct ip_addr ipaddr;
+ void (* found)(char *name, struct ip_addr *ipaddr, void *arg); /* pointer to callback on DNS query done */
+ void *arg;
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+# include "arch/epstruct.h"
+#endif
+
+/* forward declarations */
+static void dns_recv(void *s, struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *addr, u16_t port);
+static void dns_check_entries(void);
+
+/*-----------------------------------------------------------------------------
+ * Globales
+ *----------------------------------------------------------------------------*/
+
+/* DNS variables */
+static struct udp_pcb *dns_pcb;
+static struct dns_table_entry dns_table[DNS_TABLE_SIZE];
+static u8_t dns_seqno;
+
+/* DNS request termination sequence: zero(1)+type(2)+class(2) */
+static unsigned char dns_endquery[] = {0,0,1,0,1};
+
+/**
+ * Initialize the resolver and configure which DNS server to use for queries.
+ *
+ * param dnsserver A pointer to a 4-byte representation of the IP
+ * address of the DNS server to be configured.
+ */
+err_t
+dns_init()
+{
+ u8_t i;
+ struct ip_addr dnsserver = {DNS_SERVER_ADDRESS};
+
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_init: initializing\n"));
+
+ /* if dns client not yet initialized... */
+ if (dns_pcb == NULL) {
+ dns_pcb = udp_new();
+
+ if (dns_pcb != NULL) {
+ /* initialize DNS table */
+ for (i=0; i<DNS_TABLE_SIZE; ++i) {
+ dns_table[i].state = DNS_STATE_UNUSED;
+ dns_table[i].found = NULL;
+ }
+
+ /* initialize DNS client */
+ udp_bind(dns_pcb, IP_ADDR_ANY, 0);
+ udp_recv(dns_pcb, dns_recv, NULL);
+
+ /* initialize default DNS primary server */
+ dns_setserver(0, &dnsserver);
+ }
+ }
+ return ERR_OK;
+}
+
+/**
+ * Obtain the currently configured DNS server.
+ * return unsigned long encoding of the IP address of
+ * the currently configured DNS server or NULL if no DNS server has
+ * been configured.
+ */
+void
+dns_setserver(u8_t numdns, struct ip_addr *dnsserver)
+{
+ LWIP_UNUSED_ARG(numdns);
+ if ((dns_pcb != NULL) && (dnsserver != NULL) && (dnsserver->addr !=0 )) {
+ udp_connect( dns_pcb, dnsserver, DNS_SERVER_PORT);
+ }
+}
+
+/**
+ * Obtain the currently configured DNS server.
+ * return unsigned long encoding of the IP address of
+ * the currently configured DNS server or NULL if no DNS server has
+ * been configured.
+ */
+u32_t
+dns_getserver(u8_t numdns)
+{
+ LWIP_UNUSED_ARG(numdns);
+ return ((dns_pcb != NULL)?dns_pcb->remote_ip.addr:0);
+}
+
+/**
+ * The DNS resolver client timer - handle retries and timeouts
+ */
+void
+dns_tmr(void)
+{
+ if (dns_pcb != NULL) {
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_tmr: dns_check_entries\n"));
+ dns_check_entries();
+ }
+}
+
+/**
+ * Look up a hostname in the array of known hostnames.
+ *
+ * \note This function only looks in the internal array of known
+ * hostnames, it does not send out a query for the hostname if none
+ * was found. The function dns_query() can be used to send a query
+ * for a hostname.
+ *
+ * return A pointer to a 4-byte representation of the hostname's IP
+ * address, or NULL if the hostname was not found in the array of
+ * hostnames.
+ */
+u32_t
+dns_lookup(char *name)
+{
+ u8_t i;
+
+ /* Walk through name list, return entry if found. If not, return NULL. */
+ for (i=0; i<DNS_TABLE_SIZE; ++i) {
+ if ( (dns_table[i].state==DNS_STATE_DONE) && (strcmp(name, dns_table[i].name)==0) ) {
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_lookup: \"%s\": found = ", name));
+ ip_addr_debug_print(DNS_DEBUG, (&(dns_table[i].ipaddr)));
+ LWIP_DEBUGF(DNS_DEBUG, ("\n"));
+ return dns_table[i].ipaddr.addr;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * dns_parse_name() - walk through a compact encoded DNS name and return the end
+ * of the name.
+ */
+static unsigned char *
+dns_parse_name(unsigned char *query)
+{
+ unsigned char n;
+
+ do {
+ n = *query++;
+
+ while(n > 0) {
+ ++query;
+ --n;
+ };
+ } while(*query != 0);
+
+ return query + 1;
+}
+
+/**
+ * dns_send
+ */
+static err_t
+dns_send( char* name, u8_t id)
+{
+ struct dns_hdr *hdr;
+ struct pbuf *p;
+ char *query, *nptr, *pHostname;
+ u8_t n;
+
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_send: \"%s\": request\n", name));
+
+ /* if here, we have either a new query or a retry on a previous query to process */
+ p = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct dns_hdr)+DNS_MAX_NAME_LENGTH+sizeof(dns_endquery), PBUF_RAM);
+ if (p) {
+ hdr = (struct dns_hdr *)p->payload;
+ memset(hdr, 0, sizeof(struct dns_hdr));
+ hdr->id = htons(id);
+ hdr->flags1 = DNS_FLAG1_RD;
+ hdr->numquestions = htons(1);
+ query = (char *)hdr + sizeof(struct dns_hdr);
+ pHostname = name;
+ --pHostname;
+ /* convert hostname into suitable query format. */
+ do {
+ ++pHostname;
+ nptr = query;
+ ++query;
+ for(n = 0; *pHostname != '.' && *pHostname != 0; ++pHostname) {
+ *query = *pHostname;
+ ++query;
+ ++n;
+ }
+ *nptr = n;
+ } while(*pHostname != 0);
+
+ memcpy( query, dns_endquery, sizeof(dns_endquery));
+
+ // resize pbuf to the exact dns query
+ pbuf_realloc(p, (query+sizeof(dns_endquery))-((char*)(p->payload)));
+
+ // send dns packet
+ udp_send(dns_pcb, p);
+
+ // free pbuf
+ pbuf_free(p);
+
+ return ERR_OK;
+ }
+
+ return ERR_BUF;
+}
+
+/**
+ * dns_check_entries() - Runs through the list of names to see if there are any
+ * that have not yet been queried and, if so, sends out a query.
+ */
+static void
+dns_check_entries(void)
+{
+ u8_t i;
+ struct dns_table_entry *pEntry;
+
+ for (i = 0; i < DNS_TABLE_SIZE; ++i) {
+ pEntry = &dns_table[i];
+ switch(pEntry->state) {
+
+ case DNS_STATE_NEW:
+ case DNS_STATE_ASKING: {
+ if (pEntry->state == DNS_STATE_ASKING) {
+ if (--pEntry->tmr == 0) {
+ if (++pEntry->retries == DNS_MAX_RETRIES) {
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_check_entries: \"%s\": timeout\n", pEntry->name));
+ /* call specified callback function if provided */
+ if (pEntry->found)
+ (*pEntry->found)(pEntry->name, NULL, pEntry->arg);
+ /* flush this entry */
+ pEntry->state = DNS_STATE_UNUSED;
+ pEntry->found = NULL;
+ continue;
+ }
+ /* wait longer for the next retry */
+ pEntry->tmr = pEntry->retries;
+ } else {
+ /* Its timer has not run out, so we move on to next entry. */
+ continue;
+ }
+ } else {
+ pEntry->state = DNS_STATE_ASKING;
+ pEntry->tmr = 1;
+ pEntry->retries = 0;
+ }
+ /* send DNS packet for this entry */
+ dns_send(pEntry->name, i);
+ break;
+ }
+
+ case DNS_STATE_DONE: {
+ /* if the time to live is nul */
+ if (--pEntry->ttl == 0) {
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_check_entries: \"%s\": flush\n", pEntry->name));
+ /* flush this entry */
+ pEntry->state = DNS_STATE_UNUSED;
+ pEntry->found = NULL;
+ }
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * Callback for DNS responses
+ */
+static void
+dns_recv(void *s, struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *addr, u16_t port)
+{
+ u8_t i;
+ char *pHostname;
+ struct dns_answer *ans;
+ struct dns_hdr *hdr;
+ struct dns_table_entry *pEntry;
+ u8_t nquestions, nanswers;
+
+ hdr = (struct dns_hdr *)p->payload;
+
+ /* The ID in the DNS header should be our entry into the name table. */
+ i = htons(hdr->id);
+ pEntry = &dns_table[i];
+ if( (i < DNS_TABLE_SIZE) && (pEntry->state == DNS_STATE_ASKING) ) {
+ /* This entry is now completed. */
+ pEntry->state = DNS_STATE_DONE;
+ pEntry->ttl = DNS_TTL_ENTRY;
+ pEntry->err = hdr->flags2 & DNS_FLAG2_ERR_MASK;
+
+ /* Check for error. If so, call callback to inform. */
+ if(pEntry->err != 0) {
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: \"%s\": error in flags\n", pEntry->name));
+ /* call specified callback function if provided */
+ if (pEntry->found)
+ (*pEntry->found)(pEntry->name, NULL, pEntry->arg);
+ /* flush this entry */
+ pEntry->state = DNS_STATE_UNUSED;
+ pEntry->found = NULL;
+ return;
+ }
+
+ /* We only care about the question(s) and the answers. The authrr
+ and the extrarr are simply discarded. */
+ nquestions = htons(hdr->numquestions);
+ nanswers = htons(hdr->numanswers);
+
+ /* Skip the name in the question. XXX: This should really be checked
+ agains the name in the question, to be sure that they match. */
+ pHostname = (char *) dns_parse_name((unsigned char *)p->payload + sizeof(struct dns_hdr)) + 4/*type(2)+class(2)*/;
+
+ while(nanswers > 0) {
+ /* The first byte in the answer resource record determines if it
+ is a compressed record or a normal one. */
+ if(*pHostname & 0xc0) {
+ /* Compressed name. */
+ pHostname +=2;
+ /* printf("Compressed anwser\n");*/
+ } else {
+ /* Not compressed name. */
+ pHostname = (char *) dns_parse_name((unsigned char *)pHostname);
+ }
+
+ /* TODO: isn't it any problem to access to dns_answer fields since pHostname's length can be unaligned? */
+ ans = (struct dns_answer *)pHostname;
+ /* printf("Answer: type %x, class %x, ttl %x, length %x\n",
+ htons(ans->type), htons(ans->class), (htons(ans->ttl[0])
+ << 16) | htons(ans->ttl[1]), htons(ans->len));*/
+
+ /* Check for IP address type and Internet class. Others are discarded. */
+ if((ntohs(ans->type) == DNS_RRTYPE_A) && (ntohs(ans->class) == DNS_RRCLASS_IN) && (ntohs(ans->len) == 4/*IPv4 address*/) ) {
+ /* TODO: we should really check that this IP address is the one we want. */
+ pEntry->ipaddr = ans->ipaddr;
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: \"%s\": response = ", pEntry->name));
+ ip_addr_debug_print(DNS_DEBUG, (&(pEntry->ipaddr)));
+ LWIP_DEBUGF(DNS_DEBUG, ("\n"));
+ /* call specified callback function if provided */
+ if (pEntry->found)
+ (*pEntry->found)(pEntry->name, &pEntry->ipaddr, pEntry->arg);
+ return;
+ } else {
+ pHostname = pHostname + 10 + htons(ans->len);
+ }
+ --nanswers;
+ }
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: \"%s\": error in response\n", pEntry->name));
+ }
+}
+
+/**
+ * Queues a name so that a question for the name will be sent out.
+ * param name - The hostname that is to be queried.
+ */
+static void
+dns_query(char *name, void (*found)(char *name, struct ip_addr *addr, void *arg), void *arg)
+{
+ u8_t i;
+ u8_t lseq, lseqi;
+ struct dns_table_entry *pEntry;
+
+ /* search an unused entry, or the oldest one */
+ lseq = lseqi = 0;
+ for (i = 0; i < DNS_TABLE_SIZE; ++i) {
+ pEntry = &dns_table[i];
+ /* is it an unused entry ? */
+ if (pEntry->state == DNS_STATE_UNUSED)
+ break;
+
+ /* check if this is the oldest entry used */
+ if (dns_seqno - pEntry->seqno > lseq) {
+ lseq = dns_seqno - pEntry->seqno;
+ lseqi = i;
+ }
+ }
+
+ /* if we don't have found an unused entry, use the oldest one */
+ if (i == DNS_TABLE_SIZE) {
+ i = lseqi;
+ pEntry = &dns_table[i];
+ /* since we replace the previous entry, we "unblock" the caller */
+ LWIP_DEBUGF(DNS_DEBUG, ("dns_query: \"%s\": replaced by new entry\n", pEntry->name));
+ /* call specified callback function if provided */
+ if (pEntry->found)
+ (*pEntry->found)(pEntry->name, NULL, pEntry->arg);
+ }
+
+ /* fill the entry */
+ strcpy(pEntry->name, name);
+ pEntry->found = found;
+ pEntry->arg = arg;
+ pEntry->state = DNS_STATE_NEW;
+ pEntry->seqno = dns_seqno++;
+}
+
+/**
+ * NON-BLOCKING callback version for use with raw API
+ */
+DNS_RESULT dns_gethostbyname(char *hostname, struct ip_addr *addr,
+ void (*found)(char *name, struct ip_addr *ipaddr, void *arg),
+ void *arg
+ )
+{
+ /* not initialized or no valid server yet, or invalid addr pointer */
+ if ((dns_pcb == NULL) || (addr == NULL))
+ return DNS_QUERY_INVALID;
+
+ /* invalid hostname */
+ if ((!hostname) || (!hostname[0]))
+ return DNS_QUERY_INVALID;
+
+ /* invalid hostname length */
+ if (strlen(hostname) >= DNS_MAX_NAME_LENGTH)
+ return DNS_QUERY_INVALID;
+
+ /* host name already in octet notation? set ip addr and return COMPLETE */
+ if ((addr->addr = inet_addr(hostname)) != INADDR_NONE)
+ return DNS_COMPLETE;
+
+ /* already have this address cached? */
+ if ((addr->addr = dns_lookup(hostname)) != 0)
+ return DNS_COMPLETE;
+
+ /* queue query with specified callback */
+ dns_query(hostname, found, arg);
+
+ /* force to send request */
+ dns_check_entries();
+
+ return DNS_QUERY_QUEUED;
+}
+
+#endif /* LWIP_DNS */
projects / pes-rpp / rpp-lwip.git / commitdiff