/* * netsniff-ng - the packet sniffing beast * Copyright 2009, 2010 Daniel Borkmann. * Subject to the GPL, version 2. */ #include #include #include #include /* for ntohs() */ #include #include "proto.h" #include "protos.h" #include "lookup.h" #include "built_in.h" #include "pkt_buff.h" struct tcphdr { uint16_t source; uint16_t dest; uint32_t seq; uint32_t ack_seq; #if defined(__LITTLE_ENDIAN_BITFIELD) __extension__ uint16_t res1:4, doff:4, fin:1, syn:1, rst:1, psh:1, ack:1, urg:1, ece:1, cwr:1; #elif defined(__BIG_ENDIAN_BITFIELD) __extension__ uint16_t doff:4, res1:4, cwr:1, ece:1, urg:1, ack:1, psh:1, rst:1, syn:1, fin:1; #else # error "Adjust your defines" #endif uint16_t window; uint16_t check; uint16_t urg_ptr; } __packed; #define tprintf_flag(flag, str, prev) ({ \ bool __r = false; \ if (flag) { \ tprintf("%s%s", (prev) ? " " : "", str); \ __r = true; \ } \ __r; \ }) static void tcp(struct pkt_buff *pkt) { struct tcphdr *tcp = (struct tcphdr *) pkt_pull(pkt, sizeof(*tcp)); uint16_t src, dest; const char *src_name, *dest_name; bool v = false; if (tcp == NULL) return; src = ntohs(tcp->source); dest = ntohs(tcp->dest); src_name = lookup_port_tcp(src); dest_name = lookup_port_tcp(dest); tprintf(" [ TCP "); tprintf("Port (%u", src); if (src_name) tprintf(" (%s%s%s)", colorize_start(bold), src_name, colorize_end()); tprintf(" => %u", dest); if (dest_name) tprintf(" (%s%s%s)", colorize_start(bold), dest_name, colorize_end()); tprintf("), "); tprintf("SN (0x%x), ", ntohl(tcp->seq)); tprintf("AN (0x%x), ", ntohl(tcp->ack_seq)); tprintf("DataOff (%u), ", tcp->doff); tprintf("Res (%u), ", tcp->res1); tprintf("Flags ("); v = tprintf_flag(tcp->fin, "FIN", v); v = tprintf_flag(tcp->syn, "SYN", v); v = tprintf_flag(tcp->rst, "RST", v); v = tprintf_flag(tcp->psh, "PSH", v); v = tprintf_flag(tcp->ack, "ACK", v); v = tprintf_flag(tcp->urg, "URG", v); v = tprintf_flag(tcp->ece, "ECE", v); v = tprintf_flag(tcp->cwr, "CWR", v); tprintf("), "); tprintf("Window (%u), ", ntohs(tcp->window)); tprintf("CSum (0x%.4x), ", ntohs(tcp->check)); tprintf("UrgPtr (%u)", ntohs(tcp->urg_ptr)); tprintf(" ]\n"); } static void tcp_less(struct pkt_buff *pkt) { struct tcphdr *tcp = (struct tcphdr *) pkt_pull(pkt, sizeof(*tcp)); uint16_t src, dest; const char *src_name, *dest_name; if (tcp == NULL) return; src = ntohs(tcp->source); dest = ntohs(tcp->dest); src_name = lookup_port_tcp(src); dest_name = lookup_port_tcp(dest); tprintf(" TCP %u", src); if(src_name) tprintf("(%s%s%s)", colorize_start(bold), src_name, colorize_end()); tprintf("/%u", dest); if(dest_name) tprintf("(%s%s%s)", colorize_start(bold), dest_name, colorize_end()); tprintf(" F%s",colorize_start(bold)); if (tcp->fin) tprintf(" FIN"); if (tcp->syn) tprintf(" SYN"); if (tcp->rst) tprintf(" RST"); if (tcp->psh) tprintf(" PSH"); if (tcp->ack) tprintf(" ACK"); if (tcp->urg) tprintf(" URG"); if (tcp->ece) tprintf(" ECE"); if (tcp->cwr) tprintf(" CWR"); tprintf("%s Win %u S/A 0x%x/0x%x", colorize_end(), ntohs(tcp->window), ntohl(tcp->seq), ntohl(tcp->ack_seq)); } struct protocol tcp_ops = { .key = 0x06, .print_full = tcp, .print_less = tcp_less, }; d2164af2696821b27b04bebd8420b0e881bf44d'>rfcomm.h
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