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| author | Vadim Kochan <vadim4j@gmail.com> | 2016-01-26 22:25:07 +0200 |
|---|---|---|
| committer | Tobias Klauser <tklauser@distanz.ch> | 2016-01-28 16:30:50 +0100 |
| commit | 6b845387e5bf5f2b7c584900c87ac41daa1acf36 (patch) | |
| tree | 1fcdc23e9addc14207f70d146a5f14b52c9a2dd9 /trafgen_parser.y | |
| parent | fac5a67eb5d4928f7efbf1f0d731a7e93f0f8193 (diff) | |
trafgen: parser: Add syntax to generate ARP header fields
Add function 'arp()' to support generating ARP header fields from
the trafgen configuration language.
Supported fields:
htype hardware type, default: 1 (Ethernet)
ptype protocol type, default: 0x0800 (IP)
op|oper operation (req|request, reply, <num>), default: 1 (request)
sha|smac sender MAC address, default: device MAC
spa|sip sender IP address, default: device IP
tha|tmac target MAC address, default: 00:00:00:00:00:00
tpa|tip target IP address, default: 0.0.0.0
Note: setting hlen and tlen is not supported, these will by set to
hlen=6 and plen=4 in any case.
Example usage:
{ arp(op=request, sip=1.1.1.1, smac=11:22:33:44:55:66, tip=42.42.42.42) }
{ arp() }
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
[tk: document keywords in commit message]
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Diffstat (limited to 'trafgen_parser.y')
| -rw-r--r-- | trafgen_parser.y | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/trafgen_parser.y b/trafgen_parser.y index df1b1a6..16f9025 100644 --- a/trafgen_parser.y +++ b/trafgen_parser.y @@ -17,6 +17,8 @@ #include <errno.h> #include <stdbool.h> #include <libgen.h> +#include <net/if_arp.h> +#include <netinet/in.h> #include "xmalloc.h" #include "trafgen_parser.tab.h" @@ -337,6 +339,7 @@ static void proto_add(enum proto_id pid) %} %union { + struct in_addr ip_addr; long long int number; uint8_t bytes[256]; char *str; @@ -346,15 +349,19 @@ static void proto_add(enum proto_id pid) %token K_CPU K_CSUMIP K_CSUMUDP K_CSUMTCP K_CSUMUDP6 K_CSUMTCP6 K_CONST8 K_CONST16 K_CONST32 K_CONST64 %token K_DADDR K_SADDR K_PROT +%token K_OPER K_SHA K_SPA K_THA K_TPA K_REQUEST K_REPLY K_PTYPE K_HTYPE + %token K_ETH +%token K_ARP %token ',' '{' '}' '(' ')' '[' ']' ':' '-' '+' '*' '/' '%' '&' '|' '<' '>' '^' -%token number string mac +%token number string mac ip_addr %type <number> number expression %type <str> string %type <bytes> mac +%type <ip_addr> ip_addr %left '-' '+' '*' '/' '%' '&' '|' '<' '>' '^' @@ -566,6 +573,7 @@ ddec proto : eth_proto { } + | arp_proto { } ; eth_proto @@ -591,6 +599,44 @@ eth_field { proto_field_set_be16(hdr, ETH_PROTO_ID, $5); } ; +arp_proto + : arp '(' arp_param_list ')' { } + ; + +arp_param_list + : { } + | arp_field { } + | arp_field delimiter arp_param_list { } + ; + +arp_field + : K_OPER skip_white '=' skip_white K_REQUEST + { proto_field_set_be16(hdr, ARP_OPER, ARPOP_REQUEST); } + | K_OPER skip_white '=' skip_white K_REPLY + { proto_field_set_be16(hdr, ARP_OPER, ARPOP_REPLY); } + | K_OPER skip_white '=' skip_white number + { proto_field_set_be16(hdr, ARP_OPER, $5); } + | K_REQUEST + { proto_field_set_be16(hdr, ARP_OPER, ARPOP_REQUEST); } + | K_REPLY + { proto_field_set_be16(hdr, ARP_OPER, ARPOP_REPLY); } + | K_HTYPE skip_white '=' skip_white number + { proto_field_set_be16(hdr, ARP_HTYPE, $5); } + | K_PTYPE skip_white '=' skip_white number + { proto_field_set_be16(hdr, ARP_PTYPE, $5); } + | K_SHA skip_white '=' skip_white mac + { proto_field_set_bytes(hdr, ARP_SHA, $5); } + | K_THA skip_white '=' skip_white mac + { proto_field_set_bytes(hdr, ARP_THA, $5); } + | K_SPA skip_white '=' skip_white ip_addr + { proto_field_set_u32(hdr, ARP_SPA, $5.s_addr); } + | K_TPA skip_white '=' skip_white ip_addr + { proto_field_set_u32(hdr, ARP_TPA, $5.s_addr); } + ; +arp + : K_ARP { proto_add(PROTO_ARP); } + ; + %% static void finalize_packet(void) |