B.A.T.M.A.N December 2013

b.a.t.m.a.n@lists.open-mesh.org

12 participants
39 discussions

[B.A.T.M.A.N.] [RFCv4] [batctl] add IPv6 support to tcpdump parser

by Marco Dalla Torre

Extends 'tcpdump' functionality in 'batctl' to parse and report IPv6 communications. 'batctl' now recognizes TCP, UDP packets and the most common ICMPv6 packet types: -ECHO request and ECHO reply -unreachable destination and subcases -time exceeded -neighbor discovery protocol 'solicit' and 'advert' TCP and UDP parsing code has been moved from the IPv4 specific codepath to separate functions in order to allow reuse regardless the underlying protocol. Signed-off-by: Marco Dalla Torre <marco.dallato(a)gmail.com> --- CHANGE FROM V3 - fixed a string spacing issue To apply on fix "batctl tcpdump: Fix reported length of TCP payload" tcpdump.c | 232 ++++++++++++++++++++++++++++++++++++++++++++++++++------------ 1 file changed, 187 insertions(+), 45 deletions(-) diff --git a/tcpdump.c b/tcpdump.c index e6f8f7d..01ec445 100644 --- a/tcpdump.c +++ b/tcpdump.c @@ -32,9 +32,11 @@ #include <net/if_arp.h> #include <netinet/in.h> #include <netinet/ip.h> +#include <netinet/ip6.h> #include <netinet/tcp.h> #include <netinet/udp.h> #include <netinet/ip_icmp.h> +#include <netinet/icmp6.h> #include <netinet/if_ether.h> #include "main.h" @@ -47,6 +49,8 @@ #define ETH_P_BATMAN 0x4305 #endif /* ETH_P_BATMAN */ +#define IPV6_MIN_MTU 1280 + #define LEN_CHECK(buff_len, check_len, desc) \ if ((size_t)(buff_len) < (check_len)) { \ fprintf(stderr, "Warning - dropping received %s packet as it is smaller than expected (%zu): %zu\n", \ @@ -188,13 +192,181 @@ static void dump_arp(unsigned char *packet_buff, ssize_t buff_len, } } -static void dump_ip(unsigned char *packet_buff, ssize_t buff_len, int time_printed) +static void dump_tcp(const char ip_string[], unsigned char *packet_buff, + ssize_t buff_len, size_t ip6_header_len, char *src_addr, + char *dst_addr) { - struct iphdr *iphdr, *tmp_iphdr; + uint16_t tcp_header_len; struct tcphdr *tcphdr; - struct udphdr *udphdr, *tmp_udphdr; + + LEN_CHECK((size_t)buff_len - ip6_header_len, + sizeof(struct tcphdr), "TCP"); + tcphdr = (struct tcphdr *)(packet_buff + ip6_header_len); + tcp_header_len = tcphdr->doff * 4; + printf("%s %s.%i > ", ip_string, src_addr, ntohs(tcphdr->source)); + printf("%s.%i: TCP, Flags [%c%c%c%c%c%c], length %zu\n", + dst_addr, ntohs(tcphdr->dest), + (tcphdr->fin ? 'F' : '.'), (tcphdr->syn ? 'S' : '.'), + (tcphdr->rst ? 'R' : '.'), (tcphdr->psh ? 'P' : '.'), + (tcphdr->ack ? 'A' : '.'), (tcphdr->urg ? 'U' : '.'), + (size_t)buff_len - ip6_header_len - tcp_header_len); +} + +static void dump_udp(const char ip_string[], unsigned char *packet_buff, + ssize_t buff_len, size_t ip6_header_len, char *src_addr, + char *dst_addr) +{ + struct udphdr *udphdr; + + LEN_CHECK((size_t)buff_len - ip6_header_len, sizeof(struct udphdr), + "UDP"); + udphdr = (struct udphdr *)(packet_buff + ip6_header_len); + printf("%s %s.%i > ", ip_string, src_addr, ntohs(udphdr->source)); + + switch (ntohs(udphdr->dest)) { + case 67: + LEN_CHECK((size_t)buff_len - ip6_header_len - + sizeof(struct udphdr), (size_t) 44, "DHCP"); + printf("%s.67: BOOTP/DHCP, Request from %s, length %zu\n", + dst_addr, + ether_ntoa_long((struct ether_addr *)(((char *)udphdr) + + sizeof(struct udphdr) + 28)), + (size_t)buff_len - ip6_header_len - + sizeof(struct udphdr)); + break; + case 68: + printf("%s.68: BOOTP/DHCP, Reply, length %zu\n", dst_addr, + (size_t)buff_len - ip6_header_len - + sizeof(struct udphdr)); + break; + default: + printf("%s.%i: UDP, length %zu\n", dst_addr, + ntohs(udphdr->dest), + (size_t)buff_len - ip6_header_len - + sizeof(struct udphdr)); + break; + } +} + +static void dump_ipv6(unsigned char *packet_buff, ssize_t buff_len, + int time_printed) +{ + struct ip6_hdr *iphdr; + struct icmp6_hdr *icmphdr; + + char ipv6_addr_src[40], ipv6_addr_dst[40]; + char ip_saddr[40], ip_daddr[40], nd_nas_target[40]; + struct nd_neighbor_solicit *nd_neigh_sol; + struct nd_neighbor_advert *nd_advert; + const char ip_string[] = "IP6"; + + iphdr = (struct ip6_hdr *)packet_buff; + LEN_CHECK((size_t)buff_len, (size_t)(sizeof(struct ip6_hdr)), "IP6"); + + if (!time_printed) + print_time(); + + inet_ntop(AF_INET6, &(iphdr->ip6_src), ipv6_addr_src, 40); + inet_ntop(AF_INET6, &(iphdr->ip6_dst), ipv6_addr_dst, 40); + + switch (iphdr->ip6_nxt) { + case IPPROTO_ICMPV6: + LEN_CHECK((size_t)buff_len - (size_t)(sizeof(struct ip6_hdr)), + sizeof(struct icmp6_hdr), "ICMPv6"); + icmphdr = (struct icmp6_hdr *)(packet_buff + + sizeof(struct ip6_hdr)); + + printf("IP6 %s > %s ", ipv6_addr_src, ipv6_addr_dst); + if (icmphdr->icmp6_type < ICMP6_INFOMSG_MASK && + (size_t)(buff_len) > IPV6_MIN_MTU) { + fprintf(stderr, + "Warning - dropping received 'ICMPv6 destination unreached' packet as it is bigger than maximum allowed size (%u): %zu\n", + IPV6_MIN_MTU, (size_t)(buff_len)); + return; + } + + printf("ICMP6"); + switch (icmphdr->icmp6_type) { + case ICMP6_DST_UNREACH: + switch (icmphdr->icmp6_code) { + case ICMP6_DST_UNREACH_NOROUTE: + printf(", unreachable route\n"); + break; + case ICMP6_DST_UNREACH_ADMIN: + printf(", unreachable prohibited\n"); + break; + case ICMP6_DST_UNREACH_ADDR: + printf(", unreachable address\n"); + break; + case ICMP6_DST_UNREACH_BEYONDSCOPE: + printf(", beyond scope\n"); + break; + case ICMP6_DST_UNREACH_NOPORT: + printf(", unreachable port\n"); + break; + default: + printf(" unknown unreach code (%u)\n", + icmphdr->icmp6_code); + } + break; + case ICMP6_ECHO_REQUEST: + printf(" echo request, id: %d, seq: %d, length: %hu\n", + icmphdr->icmp6_id, icmphdr->icmp6_seq, + iphdr->ip6_plen); + break; + case ICMP6_ECHO_REPLY: + printf(" echo reply, id: %d, seq: %d, length: %hu\n", + icmphdr->icmp6_id, icmphdr->icmp6_seq, + iphdr->ip6_plen); + break; + case ICMP6_TIME_EXCEEDED: + printf(" time exceeded in-transit, length %zu\n", + (size_t)buff_len - sizeof(struct icmp6_hdr)); + break; + case ND_NEIGHBOR_SOLICIT: + nd_neigh_sol = (struct nd_neighbor_solicit *)icmphdr; + inet_ntop(AF_INET6, &(nd_neigh_sol->nd_ns_target), + nd_nas_target, 40); + printf(" neighbor solicitation, who has %s, length %zd\n", + nd_nas_target, buff_len); + break; + case ND_NEIGHBOR_ADVERT: + nd_advert = (struct nd_neighbor_advert *)icmphdr; + inet_ntop(AF_INET6, &(nd_advert->nd_na_target), + nd_nas_target, 40); + printf(" neighbor advertisement, tgt is %s, length %zd\n", + nd_nas_target, buff_len); + break; + default: + printf(", destination unreachable, unknown icmp6 type (%u)\n", + icmphdr->icmp6_type); + break; + } + break; + case IPPROTO_TCP: + inet_ntop(AF_INET6, &(iphdr->ip6_src), ip_saddr, 40); + inet_ntop(AF_INET6, &(iphdr->ip6_dst), ip_daddr, 40); + dump_tcp(ip_string, packet_buff, buff_len, + sizeof(struct ip6_hdr), ip_saddr, ip_daddr); + break; + case IPPROTO_UDP: + inet_ntop(AF_INET6, &(iphdr->ip6_src), ip_saddr, 40); + inet_ntop(AF_INET6, &(iphdr->ip6_dst), ip_daddr, 40); + dump_udp(ip_string, packet_buff, buff_len, + sizeof(struct ip6_hdr), ip_saddr, ip_daddr); + break; + default: + printf(" IPv6 unknown protocol: %i\n", iphdr->ip6_nxt); + } +} + +static void dump_ip(unsigned char *packet_buff, ssize_t buff_len, + int time_printed) +{ + struct iphdr *iphdr, *tmp_iphdr; + struct udphdr *tmp_udphdr; struct icmphdr *icmphdr; - uint16_t tcp_header_len; + const char ip_string[] = "IP"; iphdr = (struct iphdr *)packet_buff; LEN_CHECK((size_t)buff_len, (size_t)(iphdr->ihl * 4), "IP"); @@ -255,51 +427,16 @@ static void dump_ip(unsigned char *packet_buff, ssize_t buff_len, int time_print (size_t)buff_len - (iphdr->ihl * 4)); break; } - break; case IPPROTO_TCP: - tcphdr = (struct tcphdr *)(packet_buff + (iphdr->ihl * 4)); - tcp_header_len = tcphdr->doff * 4; - LEN_CHECK((size_t)buff_len - (iphdr->ihl * 4), - (size_t)tcp_header_len, "TCP"); - - printf("IP %s.%i > ", inet_ntoa(*(struct in_addr *)&iphdr->saddr), ntohs(tcphdr->source)); - printf("%s.%i: TCP, flags [%c%c%c%c%c%c], length %zu\n", - inet_ntoa(*(struct in_addr *)&iphdr->daddr), ntohs(tcphdr->dest), - (tcphdr->fin ? 'F' : '.'), (tcphdr->syn ? 'S' : '.'), - (tcphdr->rst ? 'R' : '.'), (tcphdr->psh ? 'P' : '.'), - (tcphdr->ack ? 'A' : '.'), (tcphdr->urg ? 'U' : '.'), - (size_t)buff_len - (iphdr->ihl * 4) - tcp_header_len); + dump_tcp(ip_string, packet_buff, buff_len, iphdr->ihl * 4, + inet_ntoa(*(struct in_addr *)&iphdr->saddr), + inet_ntoa(*(struct in_addr *)&iphdr->daddr)); break; case IPPROTO_UDP: - LEN_CHECK((size_t)buff_len - (iphdr->ihl * 4), sizeof(struct udphdr), "UDP"); - - udphdr = (struct udphdr *)(packet_buff + (iphdr->ihl * 4)); - printf("IP %s.%i > ", inet_ntoa(*(struct in_addr *)&iphdr->saddr), ntohs(udphdr->source)); - - switch (ntohs(udphdr->dest)) { - case 67: - LEN_CHECK((size_t)buff_len - (iphdr->ihl * 4) - sizeof(struct udphdr), (size_t) 44, "DHCP"); - printf("%s.67: BOOTP/DHCP, Request from %s, length %zu\n", - inet_ntoa(*(struct in_addr *)&iphdr->daddr), - ether_ntoa_long((struct ether_addr *)(((char *)udphdr) + sizeof(struct udphdr) + 28)), - (size_t)buff_len - (iphdr->ihl * 4) - sizeof(struct udphdr)); - break; - case 68: - printf("%s.68: BOOTP/DHCP, Reply, length %zu\n", - inet_ntoa(*(struct in_addr *)&iphdr->daddr), - (size_t)buff_len - (iphdr->ihl * 4) - sizeof(struct udphdr)); - break; - default: - printf("%s.%i: UDP, length %zu\n", - inet_ntoa(*(struct in_addr *)&iphdr->daddr), ntohs(udphdr->dest), - (size_t)buff_len - (iphdr->ihl * 4) - sizeof(struct udphdr)); - break; - } - - break; - case IPPROTO_IPV6: - printf("IP6: not implemented yet\n"); + dump_udp(ip_string, packet_buff, buff_len, iphdr->ihl * 4, + inet_ntoa(*(struct in_addr *)&iphdr->saddr), + inet_ntoa(*(struct in_addr *)&iphdr->daddr)); break; default: printf("IP unknown protocol: %i\n", iphdr->protocol); @@ -500,6 +637,11 @@ static void parse_eth_hdr(unsigned char *packet_buff, ssize_t buff_len, int read if ((dump_level & DUMP_TYPE_NONBAT) || (time_printed)) dump_ip(packet_buff + ETH_HLEN, buff_len - ETH_HLEN, time_printed); break; + case ETH_P_IPV6: + if ((dump_level & DUMP_TYPE_NONBAT) || (time_printed)) + dump_ipv6(packet_buff + ETH_HLEN, buff_len - ETH_HLEN, + time_printed); + break; case ETH_P_8021Q: if ((dump_level & DUMP_TYPE_NONBAT) || (time_printed)) dump_vlan(packet_buff, buff_len, read_opt, time_printed); -- 1.8.3.2

9 years, 3 months

[B.A.T.M.A.N.] [PATCH maint 1/2] Revert "batman-adv: free nf_bridge member on locally delivered skb"

by Antonio Quartulli

This reverts commit 9048eb62124f47f66d12eb1d706ab5fb265553f7. This fix can be implemented using the nf_Reset() helper instead of partly reimplementing it with a batman-adv private function. Signed-off-by: Antonio Quartulli <antonio(a)meshcoding.com> --- soft-interface.c | 8 -------- soft-interface.h | 16 ---------------- 2 files changed, 24 deletions(-) diff --git a/soft-interface.c b/soft-interface.c index 5dd1247..33b6144 100644 --- a/soft-interface.c +++ b/soft-interface.c @@ -371,14 +371,6 @@ void batadv_interface_rx(struct net_device *soft_iface, if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest)) goto dropped; - /* Clean the netfilter state before delivering the skb. - * This packet may have traversed a bridge when it was encapsulated into - * the batman header. Now that the header has been removed, the - * netfilter state must be cleaned up to avoid to mess up with a - * possible second bridge - */ - batadv_nf_bridge_skb_free(skb); - netif_rx(skb); goto out; diff --git a/soft-interface.h b/soft-interface.h index 5c19c42..2f2472c 100644 --- a/soft-interface.h +++ b/soft-interface.h @@ -29,20 +29,4 @@ void batadv_softif_destroy_sysfs(struct net_device *soft_iface); int batadv_softif_is_valid(const struct net_device *net_dev); extern struct rtnl_link_ops batadv_link_ops; -#ifdef CONFIG_BRIDGE_NETFILTER -/** - * batadv_nf_bridge_skb_free - clean the NF bridge data in an skb - * @skb: the skb which nf data has to be free'd - */ -static inline void batadv_nf_bridge_skb_free(struct sk_buff *skb) -{ - nf_bridge_put(skb->nf_bridge); - skb->nf_bridge = NULL; -} -#else -static inline void batadv_nf_bridge_skb_free(struct sk_buff *skb) -{ -} -#endif /* CONFIG_BRIDGE_NETFILTER */ - #endif /* _NET_BATMAN_ADV_SOFT_INTERFACE_H_ */ -- 1.8.5.2

9 years, 3 months

[B.A.T.M.A.N.] [PATCH 09/21] batman-adv: slight optimization of addr compare

by Ding Tianhong

Use the recently added and possibly more efficient ether_addr_equal_unaligned to instead of memcmp. Cc: Marek Lindner <mareklindner(a)neomailbox.ch> Cc: Simon Wunderlich <sw(a)simonwunderlich.de> Cc: Antonio Quartulli <antonio(a)meshcoding.com> Cc: "David S. Miller" <davem(a)davemloft.net> Cc: b.a.t.m.a.n(a)lists.open-mesh.org Cc: netdev(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Signed-off-by: Tan Xiaojun <tanxiaojun(a)huawei.com> Signed-off-by: Ding Tianhong <dingtianhong(a)huawei.com> --- net/batman-adv/originator.c | 2 +- net/batman-adv/translation-table.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c index 8ab1434..0490a26 100644 --- a/net/batman-adv/originator.c +++ b/net/batman-adv/originator.c @@ -41,7 +41,7 @@ int batadv_compare_orig(const struct hlist_node *node, const void *data2) const void *data1 = container_of(node, struct batadv_orig_node, hash_entry); - return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); + return ether_addr_equal_unaligned(data1, data2) ? 1 : 0; } /** diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index 4add57d..5e66d4b 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -51,7 +51,7 @@ static int batadv_compare_tt(const struct hlist_node *node, const void *data2) const void *data1 = container_of(node, struct batadv_tt_common_entry, hash_entry); - return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); + return ether_addr_equal_unaligned(data1, data2) ? 1 : 0; } /** -- 1.8.0

9 years, 3 months

[B.A.T.M.A.N.] pull request [net]: batman-adv 2013-12-19

by Antonio Quartulli

Hello David, this is a pull request intended for net. Patch 1 is fixing a bug that is present in the batman-adv code since a while. The bug prevents a batman-adv encapsulated packet from being correctly processed by "Netfilter Bridge" twice. In particular a packet that first enters a bridge with the batman-adv header and then enters another bridge after the header has been removed is improperly processed. The problem is due to the skb->nf_bridge member not being cleaned when the batman-adv header is removed. This patch takes care of properly releasing the nf_bridge field at the right time (like all the other tunneling protocol do). ** Please, enqueue this patch for stable. Patches from 2 to 6 take care of reshaping the packet layout a little bit to make sure that all the structures we use for sending messages have size multiple of 4 (or 2 when pack(2) is used). This solves the problem raised by Russel King about the static checks failure when compiling the module on the ARM architecture. Please pull or let me know of any problem. Thank you, Antonio The following changes since commit 58a4782449c5882f61882396ef18cc34c7dc1269: ipv6: sit: update mtu check to take care of gso packets (2013-12-18 17:55:24 -0500) are available in the git repository at: git://git.open-mesh.org/linux-merge.git tags/batman-adv-fix-for-davem for you to fetch changes up to 128cfa6a586154581ce1b891baf929810117a82a: batman-adv: fix alignment for batadv_tvlv_tt_change (2013-12-19 00:27:24 +0100) ---------------------------------------------------------------- Included changes: - release skb->nf_bridge when removing the batman-adv header from an incoming packet. This prevents netfilter bridge from being fooled when the same packet enters a bridge twice (or more): the first time within the batman-adv header and the second time without. - adjust the packet layout to prevent any architecture from adding padding bytes. All the structs sent over the wire now have size multiple of 4bytes (unless pack(2) is used). ---------------------------------------------------------------- Antonio Quartulli (3): batman-adv: free nf_bridge member on locally delivered skb batman-adv: fix size of batadv_icmp_header batman-adv: fix alignment for batadv_tvlv_tt_change Simon Wunderlich (3): batman-adv: fix alignment for batadv_coded_packet batman-adv: fix header alignment by unrolling batadv_header batman-adv: fix size of batadv_bla_claim_dst net/batman-adv/bat_iv_ogm.c | 36 +++++----- net/batman-adv/distributed-arp-table.c | 6 +- net/batman-adv/fragmentation.c | 8 +-- net/batman-adv/icmp_socket.c | 6 +- net/batman-adv/main.c | 16 ++--- net/batman-adv/network-coding.c | 22 +++--- net/batman-adv/packet.h | 124 +++++++++++++++++++++++++-------- net/batman-adv/routing.c | 30 ++++---- net/batman-adv/send.c | 10 +-- net/batman-adv/soft-interface.c | 19 +++-- net/batman-adv/soft-interface.h | 16 +++++ net/batman-adv/translation-table.c | 6 +- 12 files changed, 195 insertions(+), 104 deletions(-)

9 years, 3 months

[B.A.T.M.A.N.] [PATCH 1/2] alfred: fix batadv-vis invocation in init.d script

by Gui Iribarren

broken (wouldn't start, failing silently) since the following commit: * "renamed vis to batadv-vis to avoid collisions with other vis binaries" which renamed only some instances of the "vis" command Signed-off-by: Gui Iribarren <gui(a)altermundi.net> --- alfred/Makefile | 2 +- alfred/files/alfred.init | 10 +++++----- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/alfred/Makefile b/alfred/Makefile index ffc8026..b9c2c33 100644 --- a/alfred/Makefile +++ b/alfred/Makefile @@ -12,7 +12,7 @@ include $(TOPDIR)/rules.mk # PKG_NAME:=alfred PKG_VERSION:=2013.4.0 -PKG_RELEASE:=1 +PKG_RELEASE:=2 PKG_MD5SUM:=3891697e127b1037cfc9349fd96e9993 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz diff --git a/alfred/files/alfred.init b/alfred/files/alfred.init index e52a7bd..b678d4c 100755 --- a/alfred/files/alfred.init +++ b/alfred/files/alfred.init @@ -13,7 +13,7 @@ alfred_args="" vis_args="" facters_dir="/etc/alfred" pid_file_alfred="/var/run/alfred.pid" -pid_file_vis="/var/run/vis.pid" +pid_file_vis="/var/run/batadv-vis.pid" enable=0 vis_enable=0 SERVICE_DAEMONIZE=1 @@ -44,7 +44,7 @@ alfred_start() enable=1 config_get_bool start_vis "$section" start_vis 0 - if [ "$start_vis" = 1 ] && [ -x /usr/sbin/vis ]; then + if [ "$start_vis" = 1 ] && [ -x /usr/sbin/batadv-vis ]; then vis_enable=1 append vis_args "-i $batmanif -s" fi @@ -67,9 +67,9 @@ start() service_start /usr/sbin/alfred ${alfred_args} if [ "$vis_enable" = "1" ]; then - echo "${initscript}: starting vis" + echo "${initscript}: starting batadv-vis" SERVICE_PID_FILE="$pid_file_vis" - service_start /usr/sbin/vis ${vis_args} + service_start /usr/sbin/batadv-vis ${vis_args} fi if [ "$run_facters" = "1" ]; then @@ -87,7 +87,7 @@ stop() SERVICE_PID_FILE="$pid_file_alfred" service_stop /usr/sbin/alfred SERVICE_PID_FILE="$pid_file_vis" - [ -x /usr/sbin/vis ] && service_stop /usr/sbin/vis + [ -x /usr/sbin/batadv-vis ] && service_stop /usr/sbin/batadv-vis sed "\|for file in $facters_dir/\* ; do |d" -i /etc/crontabs/root /etc/init.d/cron restart } -- 1.8.4.rc3

9 years, 3 months

[B.A.T.M.A.N.] [PATCH next] batman-adv: fix alignment for batadv_tvlv_tt_change

by Antonio Quartulli

Make struct batadv_tvlv_tt_change 4 bytes long to avoid padding on any architecture. Signed-off-by: Antonio Quartulli <antonio(a)meshcoding.com> --- packet.h | 4 ++-- translation-table.c | 6 ++++-- 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/packet.h b/packet.h index 04cf27c..2dd8f24 100644 --- a/packet.h +++ b/packet.h @@ -484,13 +484,13 @@ struct batadv_tvlv_tt_vlan_data { * struct batadv_tvlv_tt_change - translation table diff data * @flags: status indicators concerning the non-mesh client (see * batadv_tt_client_flags) - * @reserved: reserved field + * @reserved: reserved field - useful for alignment purposes only * @addr: mac address of non-mesh client that triggered this tt change * @vid: VLAN identifier */ struct batadv_tvlv_tt_change { uint8_t flags; - uint8_t reserved; + uint8_t reserved[3]; uint8_t addr[ETH_ALEN]; __be16 vid; }; diff --git a/translation-table.c b/translation-table.c index 4add57d..ff625fe 100644 --- a/translation-table.c +++ b/translation-table.c @@ -333,7 +333,8 @@ static void batadv_tt_local_event(struct batadv_priv *bat_priv, return; tt_change_node->change.flags = flags; - tt_change_node->change.reserved = 0; + memset(tt_change_node->change.reserved, 0, + sizeof(tt_change_node->change.reserved)); memcpy(tt_change_node->change.addr, common->addr, ETH_ALEN); tt_change_node->change.vid = htons(common->vid); @@ -2221,7 +2222,8 @@ static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, ETH_ALEN); tt_change->flags = tt_common_entry->flags; tt_change->vid = htons(tt_common_entry->vid); - tt_change->reserved = 0; + memset(tt_change->reserved, 0, + sizeof(tt_change->reserved)); tt_num_entries++; tt_change++; -- 1.8.5.1

9 years, 3 months

[B.A.T.M.A.N.] [PATCH-next 1/4] batman-adv: fix alignment for batadv_coded_packet

by Simon Wunderlich

The compiler may decide to pad the structure, and then it does not have the expected size of 46 byte. Fix this by moving it in the pragma pack(2) part of the code. Signed-off-by: Simon Wunderlich <sw(a)simonwunderlich.de> --- packet.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/packet.h b/packet.h index 207459b..10597a6 100644 --- a/packet.h +++ b/packet.h @@ -315,8 +315,6 @@ struct batadv_bcast_packet { */ }; -#pragma pack() - /** * struct batadv_coded_packet - network coded packet * @header: common batman packet header and ttl of first included packet @@ -349,6 +347,8 @@ struct batadv_coded_packet { __be16 coded_len; }; +#pragma pack() + /** * struct batadv_unicast_tvlv - generic unicast packet with tvlv payload * @header: common batman packet header -- 1.7.10.4

9 years, 3 months

[B.A.T.M.A.N.] [PATCHv3 next 3/4] batman-adv: fix size of batadv_icmp_header

by Antonio Quartulli

struct batadv_icmp_header currently has a size of 17, which will be padded to 20 on some architectures. Fix this by unrolling the header into the parent structures. Moreover keep the ICMP parsing functions as generic as they are now by using a stub icmp_header struct during packet parsing. Signed-off-by: Antonio Quartulli <antonio(a)meshcoding.com> --- Changes from v2: - readded comment next to msg_type memeber main.c | 4 ++-- packet.h | 40 +++++++++++++++++++++++++++++++++++----- routing.c | 14 +++++++------- 3 files changed, 44 insertions(+), 14 deletions(-) diff --git a/main.c b/main.c index d87778b..1511f64 100644 --- a/main.c +++ b/main.c @@ -426,8 +426,8 @@ static void batadv_recv_handler_init(void) BUILD_BUG_ON(offsetof(struct batadv_unicast_packet, dest) != 4); BUILD_BUG_ON(offsetof(struct batadv_unicast_tvlv_packet, dst) != 4); BUILD_BUG_ON(offsetof(struct batadv_frag_packet, dest) != 4); - BUILD_BUG_ON(offsetof(struct batadv_icmp_packet, icmph.dst) != 4); - BUILD_BUG_ON(offsetof(struct batadv_icmp_packet_rr, icmph.dst) != 4); + BUILD_BUG_ON(offsetof(struct batadv_icmp_packet, dst) != 4); + BUILD_BUG_ON(offsetof(struct batadv_icmp_packet_rr, dst) != 4); /* broadcast packet */ batadv_rx_handler[BATADV_BCAST] = batadv_recv_bcast_packet; diff --git a/packet.h b/packet.h index 175ce7d..2a857ed 100644 --- a/packet.h +++ b/packet.h @@ -191,7 +191,7 @@ struct batadv_ogm_packet { #define BATADV_OGM_HLEN sizeof(struct batadv_ogm_packet) /** - * batadv_icmp_header - common ICMP header + * batadv_icmp_header - common members among all the ICMP packets * @packet_type: batman-adv packet type, part of the general header * @version: batman-adv protocol version, part of the genereal header * @ttl: time to live for this packet, part of the genereal header @@ -199,6 +199,11 @@ struct batadv_ogm_packet { * @dst: address of the destination node * @orig: address of the source node * @uid: local ICMP socket identifier + * @align: not used - useful for alignment purposes only + * + * This structure is used for ICMP packets parsing only and it is never sent + * over the wire. The alignment field at the end is there to ensure that + * members are padded the same way as they are in real packets. */ struct batadv_icmp_header { uint8_t packet_type; @@ -208,16 +213,29 @@ struct batadv_icmp_header { uint8_t dst[ETH_ALEN]; uint8_t orig[ETH_ALEN]; uint8_t uid; + uint8_t align[3]; }; /** * batadv_icmp_packet - ICMP packet - * @icmph: common ICMP header + * @packet_type: batman-adv packet type, part of the general header + * @version: batman-adv protocol version, part of the genereal header + * @ttl: time to live for this packet, part of the genereal header + * @msg_type: ICMP packet type + * @dst: address of the destination node + * @orig: address of the source node + * @uid: local ICMP socket identifier * @reserved: not used - useful for alignment * @seqno: ICMP sequence number */ struct batadv_icmp_packet { - struct batadv_icmp_header icmph; + uint8_t packet_type; + uint8_t version; + uint8_t ttl; + uint8_t msg_type; /* see ICMP message types above */ + uint8_t dst[ETH_ALEN]; + uint8_t orig[ETH_ALEN]; + uint8_t uid; uint8_t reserved; __be16 seqno; }; @@ -226,13 +244,25 @@ struct batadv_icmp_packet { /** * batadv_icmp_packet_rr - ICMP RouteRecord packet - * @icmph: common ICMP header + * @packet_type: batman-adv packet type, part of the general header + * @version: batman-adv protocol version, part of the genereal header + * @ttl: time to live for this packet, part of the genereal header + * @msg_type: ICMP packet type + * @dst: address of the destination node + * @orig: address of the source node + * @uid: local ICMP socket identifier * @rr_cur: number of entries the rr array * @seqno: ICMP sequence number * @rr: route record array */ struct batadv_icmp_packet_rr { - struct batadv_icmp_header icmph; + uint8_t packet_type; + uint8_t version; + uint8_t ttl; + uint8_t msg_type; /* see ICMP message types above */ + uint8_t dst[ETH_ALEN]; + uint8_t orig[ETH_ALEN]; + uint8_t uid; uint8_t rr_cur; __be16 seqno; uint8_t rr[BATADV_RR_LEN][ETH_ALEN]; diff --git a/routing.c b/routing.c index 5b52d71..46278bf 100644 --- a/routing.c +++ b/routing.c @@ -338,9 +338,9 @@ static int batadv_recv_icmp_ttl_exceeded(struct batadv_priv *bat_priv, icmp_packet = (struct batadv_icmp_packet *)skb->data; /* send TTL exceeded if packet is an echo request (traceroute) */ - if (icmp_packet->icmph.msg_type != BATADV_ECHO_REQUEST) { + if (icmp_packet->msg_type != BATADV_ECHO_REQUEST) { pr_debug("Warning - can't forward icmp packet from %pM to %pM: ttl exceeded\n", - icmp_packet->icmph.orig, icmp_packet->icmph.dst); + icmp_packet->orig, icmp_packet->dst); goto out; } @@ -349,7 +349,7 @@ static int batadv_recv_icmp_ttl_exceeded(struct batadv_priv *bat_priv, goto out; /* get routing information */ - orig_node = batadv_orig_hash_find(bat_priv, icmp_packet->icmph.orig); + orig_node = batadv_orig_hash_find(bat_priv, icmp_packet->orig); if (!orig_node) goto out; @@ -359,11 +359,11 @@ static int batadv_recv_icmp_ttl_exceeded(struct batadv_priv *bat_priv, icmp_packet = (struct batadv_icmp_packet *)skb->data; - memcpy(icmp_packet->icmph.dst, icmp_packet->icmph.orig, ETH_ALEN); - memcpy(icmp_packet->icmph.orig, primary_if->net_dev->dev_addr, + memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN); + memcpy(icmp_packet->orig, primary_if->net_dev->dev_addr, ETH_ALEN); - icmp_packet->icmph.msg_type = BATADV_TTL_EXCEEDED; - icmp_packet->icmph.ttl = BATADV_TTL; + icmp_packet->msg_type = BATADV_TTL_EXCEEDED; + icmp_packet->ttl = BATADV_TTL; if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP) ret = NET_RX_SUCCESS; -- 1.8.4.4

9 years, 3 months

[B.A.T.M.A.N.] alfred init.d bugs

by Gui Iribarren

alfred will refuse to start if bat0 doesn't exist yet root@48cfeb:~# alfred -i br-lan -m -b bat0 Could not find transtable_global for interface bat0. Make sure it is a valid batman-adv soft-interface at boot time this can create a race condition, since wifi interfaces can take longer to be brought up, making bat0 appear much later than the time alfred init.d script is run. In the following example, 4 seconds later. Sun Nov 3 05:09:13 2013 kern.emerg /etc/rc.d/S99alfred: starting alfred Sun Nov 3 05:09:13 2013 kern.emerg /etc/rc.d/S99alfred: starting batadv-vis Sun Nov 3 05:09:13 2013 kern.emerg can't connect to unix socket: Connection refused Sun Nov 3 05:09:13 2013 kern.emerg can't connect to unix socket: Connection refused Sun Nov 3 05:09:17 2013 kern.info kernel: [ 28.620000] batman_adv: bat0: Adding interface: wlan0ah.145 Sun Nov 3 05:09:17 2013 kern.info kernel: [ 28.620000] batman_adv: bat0: Interface activated: wlan0ah.145 Sun Nov 3 05:09:17 2013 daemon.notice netifd: Interface 'lm_wlan0ah_bata' is now up Sun Nov 3 05:09:17 2013 kern.info kernel: [ 29.060000] batman_adv: bat0: bridge_loop_avoidance: Changing from: disabled to: enabled Sun Nov 3 05:09:17 2013 kern.info kernel: [ 29.080000] batman_adv: bat0: distributed_arp_table: Changing from: enabled to: disabled sending a patch for this in a minute, along with another bugfix which needs less explanation :)

9 years, 3 months

[B.A.T.M.A.N.] [PATCH -next 0/3] seq_printf/puts/putc: Start to convert to return void

by Joe Perches

Many uses of the return value of seq_printf/seq_puts/seq_putc are incorrect. Many assume that the return value is the number of chars emitted into a buffer like printf/puts/putc. It would be better to make the return value of these functions void to avoid these misuses. Start to do so. Convert seq_overflow to a public function from a static function. Remove the return uses of seq_printf/seq_puts/seq_putc from net. Add a seq_overflow function call instead. Joe Perches (3): seq: Add a seq_overflow test. batman-adv: Use seq_overflow netfilter: Use seq_overflow fs/seq_file.c | 15 ++++---- include/linux/seq_file.h | 2 + include/net/netfilter/nf_conntrack_acct.h | 3 +- net/batman-adv/gateway_client.c | 25 ++++++------ net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c | 6 ++- .../netfilter/nf_conntrack_l3proto_ipv4_compat.c | 42 +++++++++++++-------- net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c | 6 ++- net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c | 10 +++-- net/netfilter/nf_conntrack_acct.c | 11 +++--- net/netfilter/nf_conntrack_expect.c | 4 +- net/netfilter/nf_conntrack_proto_dccp.c | 12 ++++-- net/netfilter/nf_conntrack_proto_gre.c | 15 +++++--- net/netfilter/nf_conntrack_proto_sctp.c | 12 ++++-- net/netfilter/nf_conntrack_proto_tcp.c | 11 ++++-- net/netfilter/nf_conntrack_proto_udp.c | 7 ++-- net/netfilter/nf_conntrack_proto_udplite.c | 7 ++-- net/netfilter/nf_conntrack_standalone.c | 44 +++++++++++++--------- net/netfilter/nf_log.c | 26 ++++++------- net/netfilter/nfnetlink_log.c | 12 +++--- net/netfilter/nfnetlink_queue_core.c | 14 ++++--- net/netfilter/x_tables.c | 8 ++-- net/netfilter/xt_hashlimit.c | 34 +++++++++-------- 22 files changed, 191 insertions(+), 135 deletions(-) -- 1.8.1.2.459.gbcd45b4.dirty

9 years, 3 months

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B.A.T.M.A.N December 2013