X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/6aa849d3880096db053d1871e33a79e43571ab18..2c98a555f730e665a305652a84bd558f1fed83f6:/test/src/fakens.c diff --git a/test/src/fakens.c b/test/src/fakens.c index bb8d4e206..29914cd46 100644 --- a/test/src/fakens.c +++ b/test/src/fakens.c @@ -55,12 +55,15 @@ a number of milliseconds (followed by one space). Any DNS record line in a zone file can be prefixed with "DNSSEC "; if all the records found by a lookup are marked -as such then the response will have the "AD" bit set. +as such then the response will have the "AD" bit set. Any DNS record line in a zone file can be prefixed with "AA " if all the records found by a lookup are marked as such then the response will have the "AA" bit set. +Any DNS record line in a zone file can be prefixed with "TTL=" and +a number of seconds (followed by one space). + */ #include @@ -75,6 +78,7 @@ as such then the response will have the "AA" bit set. #include #include #include +#include #define FALSE 0 #define TRUE 1 @@ -105,6 +109,8 @@ typedef struct tlist { int value; } tlist; +#define DEFAULT_TTL 3600U + /* On some (older?) operating systems, the standard ns_t_xxx definitions are not available, and only the older T_xxx ones exist in nameser.h. If ns_t_a is not defined, assume we are in this state. A really old system might not even @@ -298,8 +304,8 @@ Arguments: qtypelen the length of qtype pkptr points to the output buffer pointer; this is updated countptr points to the record count; this is updated - dnssec points to the AD flag indicator; this updated - aa points to the AA flag indicator; this updated + dnssec points to the AD flag indicator; this is updated + aa points to the AA flag indicator; this is updated Returns: 0 on success, else HOST_NOT_FOUND or NO_DATA or NO_RECOVERY or PASS_ON - the latter if a "PASS ON NOT FOUND" line is seen @@ -318,8 +324,8 @@ uschar buffer[256]; uschar rrdomain[256]; uschar RRdomain[256]; -/* Decode the required type */ +/* Decode the required type */ for (typeptr = type_list; typeptr->name != NULL; typeptr++) { if (Ustrcmp(typeptr->name, qtype) == 0) break; } if (typeptr->name == NULL) @@ -331,8 +337,8 @@ if (typeptr->name == NULL) rrdomain[0] = 0; /* No previous domain */ (void)fseek(f, 0, SEEK_SET); /* Start again at the beginning */ -*dnssec = TRUE; /* cancelled by first nonsecure rec found */ -*aa = TRUE; /* cancelled by first non-authoritive record */ +if (dnssec) *dnssec = TRUE; /* cancelled by first nonsecure rec found */ +if (aa) *aa = TRUE; /* cancelled by first non-aa rec found */ /* Scan for RRs */ @@ -347,6 +353,7 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL) BOOL rr_sec = FALSE; BOOL rr_aa = FALSE; int delay = 0; + uint ttl = DEFAULT_TTL; p = buffer; while (isspace(*p)) p++; @@ -365,21 +372,27 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL) p = buffer; for (;;) { - if (Ustrncmp(p, US"DNSSEC ", 7) == 0) /* tagged as secure */ + if (Ustrncmp(p, US"DNSSEC ", 7) == 0) /* tagged as secure */ { rr_sec = TRUE; p += 7; } - else if (Ustrncmp(p, US"AA ", 3) == 0) /* tagged as authoritive */ + else if (Ustrncmp(p, US"AA ", 3) == 0) /* tagged as authoritive */ { rr_aa = TRUE; p += 3; } - else if (Ustrncmp(p, US"DELAY=", 6) == 0) /* delay before response */ + else if (Ustrncmp(p, US"DELAY=", 6) == 0) /* delay before response */ { for (p += 6; *p >= '0' && *p <= '9'; p++) delay = delay*10 + *p - '0'; if (isspace(*p)) p++; } + else if (Ustrncmp(p, US"TTL=", 4) == 0) /* TTL for record */ + { + ttl = 0; + for (p += 4; *p >= '0' && *p <= '9'; p++) ttl = ttl*10 + *p - '0'; + if (isspace(*p)) p++; + } else break; } @@ -435,15 +448,14 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL) else if (Ustrncmp(p, qtype, qtypelen) != 0 || !isspace(p[qtypelen])) continue; /* Found a relevant record */ - if (delay) millisleep(delay); - if (!rr_sec) - *dnssec = FALSE; /* cancel AD return */ + if (dnssec && !rr_sec) + *dnssec = FALSE; /* cancel AD return */ - if (!rr_aa) - *aa = FALSE; /* cancel AA return */ + if (aa && !rr_aa) + *aa = FALSE; /* cancel AA return */ yield = 0; *countptr = *countptr + 1; @@ -460,7 +472,10 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL) *pk++ = 0; *pk++ = 1; /* class = IN */ - pk += 4; /* TTL field; don't care */ + *pk++ = (ttl >>24) & 255; + *pk++ = (ttl >>16) & 255; + *pk++ = (ttl >> 8) & 255; + *pk++ = ttl & 255; rdlptr = pk; /* remember rdlength field */ pk += 2; @@ -473,48 +488,48 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL) p = strtok(p, " "); ep = p + strlen(p); if (ep[-1] != '.') sprintf(CS ep, "%s.", zone); - pk = packname(p, pk); /* primary ns */ + pk = packname(p, pk); /* primary ns */ p = strtok(NULL, " "); - pk = packname(p , pk); /* responsible mailbox */ + pk = packname(p , pk); /* responsible mailbox */ *(p += strlen(p)) = ' '; while (isspace(*p)) p++; - pk = longfield(&p, pk); /* serial */ - pk = longfield(&p, pk); /* refresh */ - pk = longfield(&p, pk); /* retry */ - pk = longfield(&p, pk); /* expire */ - pk = longfield(&p, pk); /* minimum */ + pk = longfield(&p, pk); /* serial */ + pk = longfield(&p, pk); /* refresh */ + pk = longfield(&p, pk); /* retry */ + pk = longfield(&p, pk); /* expire */ + pk = longfield(&p, pk); /* minimum */ break; case ns_t_a: for (i = 0; i < 4; i++) - { - value = 0; - while (isdigit(*p)) value = value*10 + *p++ - '0'; - *pk++ = value; - p++; - } + { + value = 0; + while (isdigit(*p)) value = value*10 + *p++ - '0'; + *pk++ = value; + p++; + } break; /* The only occurrence of a double colon is for ::1 */ case ns_t_aaaa: if (Ustrcmp(p, "::1") == 0) - { - memset(pk, 0, 15); - pk += 15; - *pk++ = 1; - } + { + memset(pk, 0, 15); + pk += 15; + *pk++ = 1; + } else for (i = 0; i < 8; i++) - { - value = 0; - while (isxdigit(*p)) - { - value = value * 16 + toupper(*p) - (isdigit(*p)? '0' : '7'); - p++; - } - *pk++ = (value >> 8) & 255; - *pk++ = value & 255; - p++; - } + { + value = 0; + while (isxdigit(*p)) + { + value = value * 16 + toupper(*p) - (isdigit(*p)? '0' : '7'); + p++; + } + *pk++ = (value >> 8) & 255; + *pk++ = value & 255; + p++; + } break; case ns_t_mx: @@ -531,17 +546,17 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL) break; case ns_t_tlsa: - pk = bytefield(&p, pk); /* usage */ - pk = bytefield(&p, pk); /* selector */ - pk = bytefield(&p, pk); /* match type */ + pk = bytefield(&p, pk); /* usage */ + pk = bytefield(&p, pk); /* selector */ + pk = bytefield(&p, pk); /* match type */ while (isxdigit(*p)) { value = toupper(*p) - (isdigit(*p) ? '0' : '7') << 4; if (isxdigit(*++p)) - { - value |= toupper(*p) - (isdigit(*p) ? '0' : '7'); - p++; - } + { + value |= toupper(*p) - (isdigit(*p) ? '0' : '7'); + p++; + } *pk++ = value & 255; } @@ -549,13 +564,13 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL) case ns_t_srv: for (i = 0; i < 3; i++) - { - value = 0; - while (isdigit(*p)) value = value*10 + *p++ - '0'; - while (isspace(*p)) p++; - *pk++ = (value >> 8) & 255; - *pk++ = value & 255; - } + { + value = 0; + while (isdigit(*p)) value = value*10 + *p++ - '0'; + while (isspace(*p)) p++; + *pk++ = (value >> 8) & 255; + *pk++ = value & 255; + } /* Fall through */ @@ -583,6 +598,55 @@ alarmfn(int sig) { } + +/************************************************* +* Special-purpose domains * +*************************************************/ + +static int +special_manyhome(uschar * packet, uschar * domain) +{ +uschar *pk = packet + 12; +uschar *rdlptr; +int i, j; + +memset(packet, 0, 12); + +for (i = 104; i <= 111; i++) for (j = 0; j <= 255; j++) + { + pk = packname(domain, pk); + *pk++ = (ns_t_a >> 8) & 255; + *pk++ = (ns_t_a) & 255; + *pk++ = 0; + *pk++ = 1; /* class = IN */ + pk += 4; /* TTL field; don't care */ + rdlptr = pk; /* remember rdlength field */ + pk += 2; + + *pk++ = 10; *pk++ = 250; *pk++ = i; *pk++ = j; + + rdlptr[0] = ((pk - rdlptr - 2) >> 8) & 255; + rdlptr[1] = (pk - rdlptr - 2) & 255; + } + +packet[6] = (2048 >> 8) & 255; +packet[7] = 2048 & 255; +packet[10] = 0; +packet[11] = 0; + +(void)fwrite(packet, 1, pk - packet, stdout); +return 0; +} + +static int +special_again(uschar * packet, uschar * domain) +{ +int delay = atoi(CCS domain); /* digits at the start of the name */ +if (delay > 0) sleep(delay); +return TRY_AGAIN; +} + + /************************************************* * Entry point and main program * *************************************************/ @@ -605,6 +669,7 @@ uschar domain[256]; uschar buffer[256]; uschar qtype[12]; uschar packet[2048 * 32 + 32]; +HEADER *header = (HEADER *)packet; uschar *pk = packet; BOOL dnssec; BOOL aa; @@ -666,38 +731,11 @@ domain[domlen] = 0; for (i = 0; i < domlen; i++) domain[i] = tolower(domain[i]); if (Ustrcmp(domain, "manyhome.test.ex") == 0 && Ustrcmp(qtype, "A") == 0) - { - uschar *pk = packet + 12; - uschar *rdlptr; - int i, j; - - memset(packet, 0, 12); - - for (i = 104; i <= 111; i++) for (j = 0; j <= 255; j++) - { - pk = packname(domain, pk); - *pk++ = (ns_t_a >> 8) & 255; - *pk++ = (ns_t_a) & 255; - *pk++ = 0; - *pk++ = 1; /* class = IN */ - pk += 4; /* TTL field; don't care */ - rdlptr = pk; /* remember rdlength field */ - pk += 2; - - *pk++ = 10; *pk++ = 250; *pk++ = i; *pk++ = j; - - rdlptr[0] = ((pk - rdlptr - 2) >> 8) & 255; - rdlptr[1] = (pk - rdlptr - 2) & 255; - } - - packet[6] = (2048 >> 8) & 255; - packet[7] = 2048 & 255; - packet[10] = 0; - packet[11] = 0; - - (void)fwrite(packet, 1, pk - packet, stdout); - return 0; - } + return special_manyhome(packet, domain); +else if (domlen >= 14 && Ustrcmp(domain + domlen - 14, "test.again.dns") == 0) + return special_again(packet, domain); +else if (domlen >= 13 && Ustrcmp(domain + domlen - 13, "test.fail.dns") == 0) + return NO_RECOVERY; if (Ustrchr(domain, '.') == NULL && qualify != NULL && @@ -749,21 +787,28 @@ if (f == NULL) count = 0; yield = find_records(f, zone, domain, qtype, qtypelen, &pk, &count, &dnssec, &aa); if (yield == NO_RECOVERY) goto END_OFF; +header->ancount = htons(count); + +/* If the AA bit should be set (as indicated by the AA prefix in the zone file), +we are expected to return some records in the authortive section. Bind9: If +there is data in the answer section, the authoritive section contains the NS +records, otherwise it contains the SOA record. Currently we mimic this +behaviour for the first case (there is some answer record). +*/ -packet[6] = (count >> 8) & 255; -packet[7] = count & 255; +if (aa) + find_records(f, zone, zone[0] == '.' ? zone+1 : zone, US"NS", 2, &pk, &count, NULL, NULL); +header->nscount = htons(count - ntohs(header->ancount)); /* There is no need to return any additional records because Exim no longer (from release 4.61) makes any use of them. */ - -packet[10] = 0; -packet[11] = 0; +header->arcount = 0; if (dnssec) - ((HEADER *)packet)->ad = 1; + header->ad = 1; if (aa) - ((HEADER *)packet)->aa = 1; + header->aa = 1; /* Close the zone file, write the result, and return. */