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From: "Fabio M. De Francesco" <fmdefrancesco@gmail.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Larry Finger <Larry.Finger@lwfinger.net>,
	Phillip Potter <phil@philpotter.co.uk>,
	Martin Kaiser <martin@kaiser.cx>,
	Michael Straube <straube.linux@gmail.com>,
	linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org
Cc: "Fabio M. De Francesco" <fmdefrancesco@gmail.com>
Subject: [PATCH v2 2/3] staging: r8188eu: Remove code depending on NAT25_LOOKUP
Date: Mon, 16 Aug 2021 19:51:38 +0200	[thread overview]
Message-ID: <20210816175138.21633-1-fmdefrancesco@gmail.com> (raw)

Remove all the code related to the management of the NAT25_LOOKUP
method in nat25_db_handle(). The only function that used that method was
the now deleted nat25_handle_frame(). Remove the NAT25_LOOKUP entry from
the NAT25_METHOD enum because it is not anymore used everywhere else in
the code of the driver.

Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
---

v2: Patch rebased against the latest Greg K-H's tree.

 drivers/staging/r8188eu/core/rtw_br_ext.c    | 112 -------------------
 drivers/staging/r8188eu/include/rtw_br_ext.h |   1 -
 2 files changed, 113 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_br_ext.c b/drivers/staging/r8188eu/core/rtw_br_ext.c
index e8eea95a52e3..0402f48319c4 100644
--- a/drivers/staging/r8188eu/core/rtw_br_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_br_ext.c
@@ -484,27 +484,6 @@ int nat25_db_handle(struct adapter *priv, struct sk_buff *skb, int method)
 
 			__nat25_db_print(priv);
 			return 0;
-		case NAT25_LOOKUP:
-			DEBUG_INFO("NAT25: Lookup IP, SA =%08x, DA =%08x\n", iph->saddr, iph->daddr);
-			tmp = be32_to_cpu(iph->daddr);
-			__nat25_generate_ipv4_network_addr(networkAddr, &tmp);
-
-			if (!__nat25_db_network_lookup_and_replace(priv, skb, networkAddr)) {
-				if (*((unsigned char *)&iph->daddr + 3) == 0xff) {
-					/*  L2 is unicast but L3 is broadcast, make L2 bacome broadcast */
-					DEBUG_INFO("NAT25: Set DA as boardcast\n");
-					memset(skb->data, 0xff, ETH_ALEN);
-				} else {
-					/*  forward unknow IP packet to upper TCP/IP */
-					DEBUG_INFO("NAT25: Replace DA with BR's MAC\n");
-					if ((*(u32 *)priv->br_mac) == 0 && (*(u16 *)(priv->br_mac+4)) == 0) {
-						printk("Re-init netdev_br_init() due to br_mac == 0!\n");
-						netdev_br_init(priv->pnetdev);
-					}
-					memcpy(skb->data, priv->br_mac, ETH_ALEN);
-				}
-			}
-			return 0;
 		default:
 			return -1;
 		}
@@ -536,20 +515,6 @@ int nat25_db_handle(struct adapter *priv, struct sk_buff *skb, int method)
 			__nat25_db_network_insert(priv, skb->data+ETH_ALEN, networkAddr);
 			__nat25_db_print(priv);
 			return 0;
-		case NAT25_LOOKUP:
-			DEBUG_INFO("NAT25: Lookup ARP\n");
-
-			arp_ptr += arp->ar_hln;
-			sender = (unsigned int *)arp_ptr;
-			arp_ptr += (arp->ar_hln + arp->ar_pln);
-			target = (unsigned int *)arp_ptr;
-			__nat25_generate_ipv4_network_addr(networkAddr, target);
-			__nat25_db_network_lookup_and_replace(priv, skb, networkAddr);
-			/*  change to ARP target mac address to Lookup result */
-			arp_ptr = (unsigned char *)(arp + 1);
-			arp_ptr += (arp->ar_hln + arp->ar_pln);
-			memcpy(arp_ptr, skb->data, ETH_ALEN);
-			return 0;
 		default:
 			return -1;
 		}
@@ -637,70 +602,6 @@ int nat25_db_handle(struct adapter *priv, struct sk_buff *skb, int method)
 					priv->pppoe_connection_in_progress = 0;
 			}
 			return 0;
-		case NAT25_LOOKUP:
-			if (ph->code == PADO_CODE || ph->code == PADS_CODE) {
-				if (priv->ethBrExtInfo.addPPPoETag) {
-					struct pppoe_tag *tag;
-					unsigned char *ptr;
-					unsigned short tagType, tagLen;
-					int offset = 0;
-
-					ptr = __nat25_find_pppoe_tag(ph, ntohs(PTT_RELAY_SID));
-					if (!ptr) {
-						DEBUG_ERR("Fail to find PTT_RELAY_SID in FADO!\n");
-						return -1;
-					}
-
-					tag = (struct pppoe_tag *)ptr;
-					tagType = (unsigned short)((ptr[0] << 8) + ptr[1]);
-					tagLen = (unsigned short)((ptr[2] << 8) + ptr[3]);
-
-					if ((tagType != ntohs(PTT_RELAY_SID)) || (tagLen < (MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN))) {
-						DEBUG_ERR("Invalid PTT_RELAY_SID tag length [%d]!\n", tagLen);
-						return -1;
-					}
-
-					pMagic = (unsigned short *)tag->tag_data;
-					if (ntohs(*pMagic) != MAGIC_CODE) {
-						DEBUG_ERR("Can't find MAGIC_CODE in %s packet!\n",
-							(ph->code == PADO_CODE ? "PADO" : "PADS"));
-						return -1;
-					}
-
-					memcpy(skb->data, tag->tag_data+MAGIC_CODE_LEN, ETH_ALEN);
-
-					if (tagLen > MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN)
-						offset = TAG_HDR_LEN;
-
-					if (skb_pull_and_merge(skb, ptr+offset, TAG_HDR_LEN+MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN-offset) < 0) {
-						DEBUG_ERR("call skb_pull_and_merge() failed in PADO packet!\n");
-						return -1;
-					}
-					ph->length = htons(ntohs(ph->length)-(TAG_HDR_LEN+MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN-offset));
-					if (offset > 0)
-						tag->tag_len = htons(tagLen-MAGIC_CODE_LEN-RTL_RELAY_TAG_LEN);
-
-					DEBUG_INFO("NAT25: Lookup PPPoE, forward %s Packet from %s\n",
-						(ph->code == PADO_CODE ? "PADO" : "PADS"),	skb->dev->name);
-				} else { /*  not add relay tag */
-					if (!priv->pppoe_connection_in_progress) {
-						DEBUG_ERR("Discard PPPoE packet due to no connection in progresss!\n");
-						return -1;
-					}
-					memcpy(skb->data, priv->pppoe_addr, ETH_ALEN);
-					priv->pppoe_connection_in_progress = WAIT_TIME_PPPOE;
-				}
-			} else {
-				if (ph->sid != 0) {
-					DEBUG_INFO("NAT25: Lookup PPPoE, lookup session packet from %s\n", skb->dev->name);
-					__nat25_generate_pppoe_network_addr(networkAddr, skb->data+ETH_ALEN, &ph->sid);
-					__nat25_db_network_lookup_and_replace(priv, skb, networkAddr);
-					__nat25_db_print(priv);
-				} else {
-					return -1;
-				}
-			}
-			return 0;
 		default:
 			return -1;
 		}
@@ -713,8 +614,6 @@ int nat25_db_handle(struct adapter *priv, struct sk_buff *skb, int method)
 			return -1;
 		case NAT25_INSERT:
 			return 0;
-		case NAT25_LOOKUP:
-			return 0;
 		default:
 			return -1;
 		}
@@ -727,8 +626,6 @@ int nat25_db_handle(struct adapter *priv, struct sk_buff *skb, int method)
 			return -1;
 		case NAT25_INSERT:
 			return 0;
-		case NAT25_LOOKUP:
-			return 0;
 		default:
 			return -1;
 		}
@@ -775,15 +672,6 @@ int nat25_db_handle(struct adapter *priv, struct sk_buff *skb, int method)
 				}
 			}
 			return 0;
-		case NAT25_LOOKUP:
-			DEBUG_INFO("NAT25: Lookup IP, SA =%4x:%4x:%4x:%4x:%4x:%4x:%4x:%4x, DA =%4x:%4x:%4x:%4x:%4x:%4x:%4x:%4x\n",
-				   iph->saddr.s6_addr16[0], iph->saddr.s6_addr16[1], iph->saddr.s6_addr16[2], iph->saddr.s6_addr16[3],
-				   iph->saddr.s6_addr16[4], iph->saddr.s6_addr16[5], iph->saddr.s6_addr16[6], iph->saddr.s6_addr16[7],
-				   iph->daddr.s6_addr16[0], iph->daddr.s6_addr16[1], iph->daddr.s6_addr16[2], iph->daddr.s6_addr16[3],
-				   iph->daddr.s6_addr16[4], iph->daddr.s6_addr16[5], iph->daddr.s6_addr16[6], iph->daddr.s6_addr16[7]);
-			__nat25_generate_ipv6_network_addr(networkAddr, (unsigned int *)&iph->daddr);
-			__nat25_db_network_lookup_and_replace(priv, skb, networkAddr);
-			return 0;
 		default:
 			return -1;
 		}
diff --git a/drivers/staging/r8188eu/include/rtw_br_ext.h b/drivers/staging/r8188eu/include/rtw_br_ext.h
index 00d461c4c6fa..69905d30c191 100644
--- a/drivers/staging/r8188eu/include/rtw_br_ext.h
+++ b/drivers/staging/r8188eu/include/rtw_br_ext.h
@@ -31,7 +31,6 @@ enum NAT25_METHOD {
 	NAT25_MIN,
 	NAT25_CHECK,
 	NAT25_INSERT,
-	NAT25_LOOKUP,
 	NAT25_PARSE,
 	NAT25_MAX
 };
-- 
2.32.0


             reply	other threads:[~2021-08-16 17:51 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-16 17:51 Fabio M. De Francesco [this message]
2021-08-16 19:52 ` Michael Straube
2021-08-17 17:55 ` Greg Kroah-Hartman
2021-08-17 20:21   ` Fabio M. De Francesco

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