Created
October 18, 2020 15:46
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Intercept all IP packets arriving at mac_rx_common() and print basic header info along with mac group + ring.
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/* | |
* Print basic Ethernet frame and IP header info for all IPv4 traffic | |
* that hits mac_rx_common() along with the group and ring it came in | |
* on. | |
*/ | |
#pragma D option quiet | |
#include <inttypes.h> | |
#include <sys/types.h> | |
#include <sys/pattr.h> | |
#include <sys/vlan.h> | |
#define ETH_FMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x" | |
BEGIN | |
{ | |
IPP_FILT=1; | |
HUMAN=1; | |
} | |
mac_rx_common:entry | |
{ | |
this->mr = (mac_ring_t *)args[1]; | |
} | |
mac_rx_common:entry /this->mr != NULL/ | |
{ | |
this->mg = (mac_group_t *)this->mr->mr_gh; | |
this->mp = args[2]; | |
this->eh = (struct ether_header *)this->mp->b_rptr; | |
this->l2type = ntohs(this->eh->ether_type); | |
this->need_lf = 0; | |
if (this->l2type == ETHERTYPE_VLAN) { | |
this->evh = (struct ether_vlan_header *)this->mp->b_rptr; | |
this->l2type = ntohs(this->evh->ether_type); | |
this->l2dst = &(this->evh->ether_dhost.ether_addr_octet[0]); | |
this->l2src = &(this->evh->ether_shost.ether_addr_octet[0]); | |
this->vid = VLAN_ID(ntohs(this->evh->ether_tci)); | |
this->eh = NULL; | |
this->offset = 18; | |
} else { | |
this->l2dst = &(this->eh->ether_dhost.ether_addr_octet[0]); | |
this->l2src = &(this->eh->ether_shost.ether_addr_octet[0]); | |
this->vid = 0; | |
this->offset = 14; | |
} | |
if (this->l2type == 0x800) { | |
this->ipha = (ipha_t *)(this->mp->b_rptr + this->offset); | |
this->l3src = inet_ntoa(&this->ipha->ipha_src); | |
this->l3dst = inet_ntoa(&this->ipha->ipha_dst); | |
this->l3proto = this->ipha->ipha_protocol; | |
} | |
if (this->l2type == 0x800 && | |
(IPP_FILT == -1 || this->l3proto == IPP_FILT)) { | |
if (HUMAN) { | |
printf("%-8s %4u/%-4u ", | |
this->mg->mrg_index == 0 ? "DEFAULT" : "RESERVED", | |
this->mg->mrg_index, this->mr->mr_index); | |
} else { | |
printf("0x%p %u 0x%p %u ", this->mg, | |
this->mg->mrg_index, this->mr, this->mr->mr_index); | |
} | |
printf(ETH_FMT, this->l2src[0], this->l2src[1], this->l2src[2], | |
this->l2src[3], this->l2src[4], this->l2src[5]); | |
printf(" "); | |
printf(ETH_FMT, this->l2dst[0], this->l2dst[1], this->l2dst[2], | |
this->l2dst[3], this->l2dst[4], this->l2dst[5]); | |
printf(" %-.4x", this->l2type); | |
printf(" %-4u", this->vid); | |
printf(" %-15s %-15s %-4u\n", this->l3src, this->l3dst, | |
this->l3proto); | |
} | |
} |
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