From: Vadim Kochan <[email protected]> Dump RTnetlink routing related info with attributes.
Signed-off-by: Vadim Kochan <[email protected]> --- proto_nlmsg.c | 227 ++++++++++++++++++++++++++++++++++++++++++++++++++++++---- timer.c | 6 ++ timer.h | 2 + 3 files changed, 222 insertions(+), 13 deletions(-) diff --git a/proto_nlmsg.c b/proto_nlmsg.c index e6ede8a..5a2527b 100644 --- a/proto_nlmsg.c +++ b/proto_nlmsg.c @@ -5,6 +5,7 @@ */ #include <stdio.h> +#include <string.h> #include <unistd.h> #include <limits.h> #include <libgen.h> @@ -17,17 +18,46 @@ #include "pkt_buff.h" #include "proto.h" #include "protos.h" +#include "timer.h" #define INFINITY 0xFFFFFFFFU #define RTA_LEN(attr) RTA_PAYLOAD(attr) #define RTA_INT(attr) (*(int *)RTA_DATA(attr)) +#define RTA_UINT(attr) (*(unsigned int *)RTA_DATA(attr)) #define RTA_UINT8(attr) (*(uint8_t *)RTA_DATA(attr)) +#define RTA_UINT32(attr) (*(uint32_t *)RTA_DATA(attr)) #define RTA_STR(attr) ((char *)RTA_DATA(attr)) #define attr_fmt(attr, fmt, ...) \ tprintf("\tA: "fmt, ##__VA_ARGS__); \ - tprintf(", Len %u\n", RTA_LEN(attr)); + tprintf(", Len %lu\n", RTA_LEN(attr)); + +struct flag_name { + const char *name; + unsigned int flag; +}; + +static const char *flags2str(struct flag_name *tbl, unsigned int flags, + char *buf, int len) +{ + int bits_stay = flags; + + memset(buf, 0, len); + + for (; tbl && tbl->name; tbl++) { + if (!(tbl->flag & flags)) + continue; + + bits_stay &= ~tbl->flag; + strncat(buf, tbl->name, len - strlen(buf) - 1); + + if (bits_stay & flags) + strncat(buf, ",", len - strlen(buf) - 1); + } + + return buf; +} static const char *nlmsg_family2str(uint16_t family) { @@ -276,6 +306,18 @@ static const char *addr2str(uint16_t af, const void *addr, char *buf, int blen) return "???"; } +static const char *scope2str(uint8_t scope) +{ + switch (scope) { + case RT_SCOPE_UNIVERSE: return "global"; + case RT_SCOPE_LINK: return "link"; + case RT_SCOPE_HOST: return "host"; + case RT_SCOPE_NOWHERE: return "nowhere"; + + default: return "Unknown"; + } +} + static void rtnl_print_ifinfo(struct nlmsghdr *hdr) { struct ifinfomsg *ifi = NLMSG_DATA(hdr); @@ -385,19 +427,9 @@ static void rtnl_print_ifaddr(struct nlmsghdr *hdr) uint32_t attrs_len = IFA_PAYLOAD(hdr); struct rtattr *attr = IFA_RTA(ifa); struct ifa_cacheinfo *ci; - char *scope = "Unknown"; char addr_str[256]; char flags[256]; - if (ifa->ifa_scope == RT_SCOPE_UNIVERSE) - scope = "global"; - else if (ifa->ifa_scope == RT_SCOPE_LINK) - scope = "link"; - else if (ifa->ifa_scope == RT_SCOPE_HOST) - scope = "host"; - else if (ifa->ifa_scope == RT_SCOPE_NOWHERE) - scope = "nowhere"; - tprintf(" [ Address Family %d (%s%s%s)", ifa->ifa_family, colorize_start(bold), addr_family2str(ifa->ifa_family), @@ -409,7 +441,9 @@ static void rtnl_print_ifaddr(struct nlmsghdr *hdr) sizeof(flags)), colorize_end()); tprintf(", Scope %d (%s%s%s)", ifa->ifa_scope, - colorize_start(bold), scope, colorize_end()); + colorize_start(bold), + scope2str(ifa->ifa_scope), + colorize_end()); tprintf(", Link Index %d ]\n", ifa->ifa_index); for (; RTA_OK(attr, attrs_len); attr = RTA_NEXT(attr, attrs_len)) { @@ -464,7 +498,169 @@ static void rtnl_print_ifaddr(struct nlmsghdr *hdr) tprintf(", created on(%.2fs)", (double)ci->cstamp / 100); tprintf(", updated on(%.2fs))", (double)ci->cstamp / 100); - tprintf(", Len %u\n", RTA_LEN(attr)); + tprintf(", Len %lu\n", RTA_LEN(attr)); + break; + } + } +} + +static const char *route_table2str(uint8_t table) +{ + switch (table) { + case RT_TABLE_UNSPEC: return "unspec"; + case RT_TABLE_COMPAT: return "compat"; + case RT_TABLE_DEFAULT: return "default"; + case RT_TABLE_MAIN: return "main"; + case RT_TABLE_LOCAL: return "local"; + + default: return "Unknown"; + } +} + +static const char *route_proto2str(uint8_t proto) +{ + switch (proto) { + case RTPROT_UNSPEC: return "unspec"; + case RTPROT_REDIRECT: return "redirect"; + case RTPROT_KERNEL: return "kernel"; + case RTPROT_BOOT: return "boot"; + case RTPROT_STATIC: return "static"; + case RTPROT_GATED: return "gated"; + case RTPROT_RA: return "ra"; + case RTPROT_MRT: return "mrt"; + case RTPROT_ZEBRA: return "zebra"; + case RTPROT_BIRD: return "bird"; + case RTPROT_DNROUTED: return "DECnet"; + case RTPROT_XORP: return "xorp"; + case RTPROT_NTK: return "netsukuku"; + case RTPROT_DHCP: return "dhcpc"; + case RTPROT_MROUTED: return "mrouted"; + + default: return "Unknown"; + } +} + +static const char *route_type2str(uint8_t type) +{ + switch (type) { + case RTN_UNSPEC: return "unspec"; + case RTN_UNICAST: return "unicast"; + case RTN_LOCAL: return "local"; + case RTN_BROADCAST: return "broadcast"; + case RTN_ANYCAST: return "anycast"; + case RTN_MULTICAST: return "multicast"; + case RTN_BLACKHOLE: return "blackhole"; + case RTN_UNREACHABLE: return "unreach"; + case RTN_PROHIBIT: return "prohibit"; + case RTN_THROW: return "throw"; + case RTN_NAT: return "nat"; + case RTN_XRESOLVE: return "xresolve"; + + default: return "Unknown"; + } +} + +static struct flag_name route_flags[] = { + { "notify", RTM_F_NOTIFY }, + { "cloned", RTM_F_CLONED }, + { "equalize", RTM_F_EQUALIZE }, + { "prefix", RTM_F_PREFIX }, + { "dead", RTNH_F_DEAD }, + { "pervasive", RTNH_F_PERVASIVE }, + { "onlink", RTNH_F_ONLINK }, + { NULL, 0 }, +}; + +static void rtnl_print_route(struct nlmsghdr *hdr) +{ + struct rtmsg *rtm = NLMSG_DATA(hdr); + uint32_t attrs_len = RTM_PAYLOAD(hdr); + struct rtattr *attr = RTM_RTA(rtm); + struct rta_cacheinfo *ci; + int hz = get_user_hz(); + char addr_str[256]; + char flags[256]; + + tprintf(" [ Route Family %d (%s%s%s)", rtm->rtm_family, + colorize_start(bold), + addr_family2str(rtm->rtm_family), + colorize_end()); + tprintf(", Dst Len %d", rtm->rtm_dst_len); + tprintf(", Src Len %d", rtm->rtm_src_len); + tprintf(", ToS %d", rtm->rtm_tos); + tprintf(", Table %d (%s%s%s)", rtm->rtm_table, + colorize_start(bold), + route_table2str(rtm->rtm_table), + colorize_end()); + tprintf(", Proto %d (%s%s%s)", rtm->rtm_protocol, + colorize_start(bold), + route_proto2str(rtm->rtm_protocol), + colorize_end()); + tprintf(", Scope %d (%s%s%s)", rtm->rtm_scope, + colorize_start(bold), + scope2str(rtm->rtm_scope), + colorize_end()); + tprintf(", Type %d (%s%s%s)", rtm->rtm_type, + colorize_start(bold), + route_type2str(rtm->rtm_type), + colorize_end()); + tprintf(", Flags 0x%x (%s%s%s) ]\n", rtm->rtm_flags, + colorize_start(bold), + flags2str(route_flags, rtm->rtm_flags, flags, + sizeof(flags)), + colorize_end()); + + for (; RTA_OK(attr, attrs_len); attr = RTA_NEXT(attr, attrs_len)) { + switch (attr->rta_type) { + case RTA_DST: + attr_fmt(attr, "Dst %s", addr2str(rtm->rtm_family, + RTA_DATA(attr), addr_str, sizeof(addr_str))); + break; + case RTA_SRC: + attr_fmt(attr, "Src %s", addr2str(rtm->rtm_family, + RTA_DATA(attr), addr_str, sizeof(addr_str))); + break; + case RTA_IIF: + attr_fmt(attr, "Iif %d", RTA_INT(attr)); + break; + case RTA_OIF: + attr_fmt(attr, "Oif %d", RTA_INT(attr)); + break; + case RTA_GATEWAY: + attr_fmt(attr, "Gateway %s", addr2str(rtm->rtm_family, + RTA_DATA(attr), addr_str, sizeof(addr_str))); + break; + case RTA_PRIORITY: + attr_fmt(attr, "Priority %u", RTA_UINT32(attr)); + break; + case RTA_PREFSRC: + attr_fmt(attr, "Pref Src %s", addr2str(rtm->rtm_family, + RTA_DATA(attr), addr_str, sizeof(addr_str))); + break; + case RTA_MARK: + attr_fmt(attr, "Mark 0x%x", RTA_UINT(attr)); + break; + case RTA_FLOW: + attr_fmt(attr, "Flow 0x%x", RTA_UINT(attr)); + break; + case RTA_TABLE: + attr_fmt(attr, "Table %d (%s%s%s)", RTA_UINT32(attr), + colorize_start(bold), + route_table2str(RTA_UINT32(attr)), + colorize_end()); + break; + case RTA_CACHEINFO: + ci = RTA_DATA(attr); + tprintf("\tA: Cache ("); + tprintf("expires(%ds)", ci->rta_expires / hz); + tprintf(", error(%d)", ci->rta_error); + tprintf(", users(%d)", ci->rta_clntref); + tprintf(", used(%d)", ci->rta_used); + tprintf(", last use(%ds)", ci->rta_lastuse / hz); + tprintf(", id(%d)", ci->rta_id); + tprintf(", ts(%d)", ci->rta_ts); + tprintf(", ts age(%ds))", ci->rta_tsage); + tprintf(", Len %lu\n", RTA_LEN(attr)); break; } } @@ -484,6 +680,11 @@ static void rtnl_msg_print(struct nlmsghdr *hdr) case RTM_GETADDR: rtnl_print_ifaddr(hdr); break; + case RTM_NEWROUTE: + case RTM_DELROUTE: + case RTM_GETROUTE: + rtnl_print_route(hdr); + break; } } diff --git a/timer.c b/timer.c index 8941ab7..c25d5b2 100644 --- a/timer.c +++ b/timer.c @@ -1,3 +1,4 @@ +#include <unistd.h> #include <sys/time.h> #include "timer.h" @@ -11,3 +12,8 @@ void set_itimer_interval_value(struct itimerval *itimer, unsigned long sec, itimer->it_value.tv_sec = sec; itimer->it_value.tv_usec = usec; } + +int get_user_hz(void) +{ + return sysconf(_SC_CLK_TCK); +} diff --git a/timer.h b/timer.h index 8e869c8..68809a6 100644 --- a/timer.h +++ b/timer.h @@ -6,4 +6,6 @@ extern void set_itimer_interval_value(struct itimerval *itimer, unsigned long sec, unsigned long usec); +extern int get_user_hz(void); + #endif /* TIMER_H */ -- 2.4.2 -- You received this message because you are subscribed to the Google Groups "netsniff-ng" group. 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