[PATCH v3] staging: r8188eu: Remove code depending on NAT25_LOOKUP

From: Fabio M. De Francesco
Date: Tue Aug 17 2021 - 14:57:32 EST

Next message: Jaegeuk Kim: "Re: [PATCH] f2fs: Add missing inline to f2fs_sanity_check_cluster() stub"
Previous message: Andrii Nakryiko: "Re: bpf: Implement minimal BPF perf link"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

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.

Remove the 'sender' pointer to integer. Remove
__nat25_db_network_lookup_and_replace(). Following the deletion of the
code related to the NAT25_LOOKUP method, they are no more needed.

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

v2->v3: Merged "[PATCH v2 2/3] staging: r8188eu: Remove code depending
on NAT25_LOOKUP" and "[PATCH v2 3/3] staging: r8188eu: Remove no more
used variable and function]" into one single patch. Asked by Greg K-H
because 2/3 introduced some intermediate build warnings that are then
fixed by 3/3. Adding build warnings, even within a series that fixes
them with following patches, is not allowed. For the above-mentioned
reasons I chose to drop the numbering of the patch in the series,
first because now it is self-contained, second because neither 2/3
or 2/2 would be anymore appropriate.

v1->v2: Patch rebased against the latest Greg K-H's tree.

drivers/staging/r8188eu/core/rtw_br_ext.c | 164 +------------------
drivers/staging/r8188eu/include/rtw_br_ext.h | 1 -
2 files changed, 1 insertion(+), 164 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_br_ext.c b/drivers/staging/r8188eu/core/rtw_br_ext.c
index e8eea95a52e3..ee52f28a1e56 100644
--- a/drivers/staging/r8188eu/core/rtw_br_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_br_ext.c
@@ -295,56 +295,6 @@ static void __network_hash_unlink(struct nat25_network_db_entry *ent)
ent->pprev_hash = NULL;
}

-static int __nat25_db_network_lookup_and_replace(struct adapter *priv,
- struct sk_buff *skb, unsigned char *networkAddr)
-{
- struct nat25_network_db_entry *db;
-
- spin_lock_bh(&priv->br_ext_lock);
-
- db = priv->nethash[__nat25_network_hash(networkAddr)];
- while (db) {
- if (!memcmp(db->networkAddr, networkAddr, MAX_NETWORK_ADDR_LEN)) {
- if (!__nat25_has_expired(priv, db)) {
- /* replace the destination mac address */
- memcpy(skb->data, db->macAddr, ETH_ALEN);
- atomic_inc(&db->use_count);
-
- DEBUG_INFO("NAT25: Lookup M:%02x%02x%02x%02x%02x%02x N:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
- "%02x%02x%02x%02x%02x%02x\n",
- db->macAddr[0],
- db->macAddr[1],
- db->macAddr[2],
- db->macAddr[3],
- db->macAddr[4],
- db->macAddr[5],
- db->networkAddr[0],
- db->networkAddr[1],
- db->networkAddr[2],
- db->networkAddr[3],
- db->networkAddr[4],
- db->networkAddr[5],
- db->networkAddr[6],
- db->networkAddr[7],
- db->networkAddr[8],
- db->networkAddr[9],
- db->networkAddr[10],
- db->networkAddr[11],
- db->networkAddr[12],
- db->networkAddr[13],
- db->networkAddr[14],
- db->networkAddr[15],
- db->networkAddr[16]);
- }
- spin_unlock_bh(&priv->br_ext_lock);
- return 1;
- }
- db = db->next_hash;
- }
- spin_unlock_bh(&priv->br_ext_lock);
- return 0;
-}
-
static void __nat25_db_network_insert(struct adapter *priv,
unsigned char *macAddr, unsigned char *networkAddr)
{
@@ -484,27 +434,6 @@ 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;
}
@@ -514,7 +443,7 @@ int nat25_db_handle(struct adapter *priv, struct sk_buff *skb, int method)
/*---------------------------------------------------*/
struct arphdr *arp = (struct arphdr *)(skb->data + ETH_HLEN);
unsigned char *arp_ptr = (unsigned char *)(arp + 1);
- unsigned int *sender, *target;
+ unsigned int *sender;

if (arp->ar_pro != __constant_htons(ETH_P_IP)) {
DEBUG_WARN("NAT25: arp protocol unknown (%4x)!\n", be16_to_cpu(arp->ar_pro));
@@ -536,20 +465,6 @@ 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 +552,6 @@ 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 +564,6 @@ 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 +576,6 @@ 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 +622,6 @@ 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

Next message: Jaegeuk Kim: "Re: [PATCH] f2fs: Add missing inline to f2fs_sanity_check_cluster() stub"
Previous message: Andrii Nakryiko: "Re: bpf: Implement minimal BPF perf link"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]