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IOS XR as-path-sets

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This commit is contained in:
Alexandre Snarskii
2016-05-11 11:33:16 +03:00
parent 2df0a54811
commit 1928419625
3 changed files with 94 additions and 4 deletions
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5
CHANGES
View File

@@ -1,4 +1,7 @@
untagged yet (2015-09-23)
untagged yet (2016-05-10)
- feature: IOS XR mode now supports as-paths (ios-regexs). Thanks
to Tassos Chatzithomaoglou for examples and proofreading.
(additions from 2015-09-23)
- bugfix: stoplist shall be able to catch AS numbers as promised.
- bugfix: bgpq3 shall not hang at unknown escapes in -M..
- gotcha: "ANY" object in recursive mode ignored: shut complaints on

12
bgpq3.c
View File

@@ -305,6 +305,8 @@ main(int argc, char* argv[])
if(expander.generation==T_ASPATH) {
if(expander.vendor==V_CISCO) {
expander.aswidth=4;
} else if(expander.vendor==V_CISCO_XR) {
expander.aswidth=6;
} else if(expander.vendor==V_JUNIPER) {
expander.aswidth=8;
} else if(expander.vendor==V_BIRD) {
@@ -313,6 +315,8 @@ main(int argc, char* argv[])
} else if(expander.generation==T_OASPATH) {
if(expander.vendor==V_CISCO) {
expander.aswidth=5;
} else if(expander.vendor==V_CISCO_XR) {
expander.aswidth=7;
} else if(expander.vendor==V_JUNIPER) {
expander.aswidth=8;
};
@@ -323,8 +327,10 @@ main(int argc, char* argv[])
expander.generation=T_PREFIXLIST;
};
if(expander.vendor==V_CISCO_XR && expander.generation!=T_PREFIXLIST) {
sx_report(SX_FATAL, "Sorry, only prefix-sets supported for IOS XR\n");
if(expander.vendor==V_CISCO_XR && expander.generation!=T_PREFIXLIST &&
expander.generation!=T_ASPATH && expander.generation!=T_OASPATH) {
sx_report(SX_FATAL, "Sorry, only prefix-sets and as-paths "
"supported for IOS XR\n");
};
if(expander.vendor==V_BIRD && expander.generation!=T_PREFIXLIST &&
expander.generation!=T_ASPATH) {
@@ -536,4 +542,4 @@ main(int argc, char* argv[])
return 0;
};

81
bgpq3_printer.c
View File

@@ -80,6 +80,45 @@ bgpq3_print_cisco_aspath(FILE* f, struct bgpq_expander* b)
fprintf(f,"ip as-path access-list %s deny .*\n", b->name?b->name:"NN");
return 0;
};
int
bgpq3_print_cisco_xr_aspath(FILE* f, struct bgpq_expander* b)
{
int nc=0, i, j, k, comma=0;
fprintf(f, "as-path-set %s", b->name?b->name:"NN");
if(b->asn32s[b->asnumber/65536] &&
b->asn32s[b->asnumber/65536][(b->asnumber%65536)/8]&
(0x80>>(b->asnumber%8))) {
fprintf(f,"\n ios-regex '^%u(_%u)*$'", b->asnumber,b->asnumber);
comma=1;
};
for(k=0;k<65536;k++) {
if(!b->asn32s[k]) continue;
for(i=0;i<8192;i++) {
for(j=0;j<8;j++) {
if(b->asn32s[k][i]&(0x80>>j)) {
if(k*65536+i*8+j==b->asnumber) continue;
if(!nc) {
fprintf(f,"%s\n ios-regex '^%u(_[0-9]+)*_(%u",
comma?",":"", b->asnumber,k*65536+i*8+j);
comma=1;
} else {
fprintf(f,"|%u",k*65536+i*8+j);
}
nc++;
if(nc==b->aswidth) {
fprintf(f,")$'");
nc=0;
};
};
};
};
};
if(nc) fprintf(f,")$'");
fprintf(f,"\nend-set\n");
return 0;
};
int
bgpq3_print_cisco_oaspath(FILE* f, struct bgpq_expander* b)
{
@@ -138,6 +177,44 @@ bgpq3_print_cisco_oaspath(FILE* f, struct bgpq_expander* b)
fprintf(f,"ip as-path access-list %s deny .*\n", b->name?b->name:"NN");
return 0;
};
int
bgpq3_print_cisco_xr_oaspath(FILE* f, struct bgpq_expander* b)
{
int nc=0, i, j, k, comma=0;
fprintf(f, "as-path-set %s", b->name?b->name:"NN");
if(b->asn32s[b->asnumber/65536] &&
b->asn32s[b->asnumber/65536][(b->asnumber%65536)/8]&
(0x80>>(b->asnumber%8))) {
fprintf(f,"\n ios-regex '^(_%u)*$'",b->asnumber);
comma=1;
};
for(k=0;k<65536;k++) {
if(!b->asn32s[k]) continue;
for(i=0;i<8192;i++) {
for(j=0;j<8;j++) {
if(b->asn32s[k][i]&(0x80>>j)) {
if(k*65536+i*8+j==b->asnumber) continue;
if(!nc) {
fprintf(f,"%s\n ios-regex '^(_[0-9]+)*_(%u",
comma?",":"", k*65536+i*8+j);
comma=1;
} else {
fprintf(f,"|%u",k*65536+i*8+j);
}
nc++;
if(nc==b->aswidth) {
fprintf(f,")$'");
nc=0;
};
};
};
};
};
if(nc) fprintf(f,")$'");
fprintf(f,"\nend-set\n");
return 0;
};
int
bgpq3_print_juniper_aspath(FILE* f, struct bgpq_expander* b)
@@ -233,6 +310,8 @@ bgpq3_print_aspath(FILE* f, struct bgpq_expander* b)
return bgpq3_print_juniper_aspath(f,b);
} else if(b->vendor==V_CISCO) {
return bgpq3_print_cisco_aspath(f,b);
} else if(b->vendor==V_CISCO_XR) {
return bgpq3_print_cisco_xr_aspath(f,b);
} else if(b->vendor==V_JSON) {
return bgpq3_print_json_aspath(f,b);
} else if(b->vendor==V_BIRD) {
@@ -250,6 +329,8 @@ bgpq3_print_oaspath(FILE* f, struct bgpq_expander* b)
return bgpq3_print_juniper_oaspath(f,b);
} else if(b->vendor==V_CISCO) {
return bgpq3_print_cisco_oaspath(f,b);
} else if(b->vendor==V_CISCO_XR) {
return bgpq3_print_cisco_xr_oaspath(f,b);
} else {
sx_report(SX_FATAL,"Unknown vendor %i\n", b->vendor);
};