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Diffstat (limited to 'pppd/plugins/pppoatm/ans.c')
-rw-r--r--pppd/plugins/pppoatm/ans.c262
1 files changed, 0 insertions, 262 deletions
diff --git a/pppd/plugins/pppoatm/ans.c b/pppd/plugins/pppoatm/ans.c
deleted file mode 100644
index 973eb33..0000000
--- a/pppd/plugins/pppoatm/ans.c
+++ /dev/null
@@ -1,262 +0,0 @@
-/* ans.c - Interface for text2atm and atm2text to ANS */
-
-/* Written 1996-2000 by Werner Almesberger, EPFL-LRC/ICA */
-
-
-/*
- * This stuff is a temporary hack to avoid using gethostbyname_nsap and such
- * without doing the "full upgrade" to getaddrinfo/getnameinfo. This also
- * serves as an exercise for me to get all the details right before I propose
- * a patch that would eventually end up in libc (and that should therefore be
- * as stable as possible).
- */
-
-#if HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-
-#include <netinet/in.h>
-#include <arpa/nameser.h>
-#include <netdb.h>
-#include <resolv.h>
-
-#include "atm.h"
-#include "atmres.h"
-
-
-#define MAX_ANSWER 2048
-#define MAX_NAME 1024
-
-#define MAX_LINE 2048 /* in /etc/e164_cc */
-#define E164_CC_DEFAULT_LEN 2
-#define E164_CC_FILE "/etc/e164_cc"
-
-#define GET16(pos) (((pos)[0] << 8) | (pos)[1])
-
-
-static int ans(const char *text,int wanted,void *result,int res_len)
-{
- unsigned char answer[MAX_ANSWER];
- unsigned char name[MAX_NAME];
- unsigned char *pos,*data,*found;
- int answer_len,name_len,data_len,found_len;
- int questions,answers;
-
- found_len = 0; /* gcc wants it */
- if ((answer_len = res_search(text,C_IN,wanted,answer,MAX_ANSWER)) < 0)
- return TRY_OTHER;
- /*
- * Response header: id, flags, #queries, #answers, #authority,
- * #additional (all 16 bits)
- */
- pos = answer+12;
- if (answer[3] & 15) return TRY_OTHER; /* rcode != 0 */
- questions = GET16(answer+4);
- if (questions != 1) return TRY_OTHER; /* trouble ... */
- answers = GET16(answer+6);
- if (answers < 1) return TRY_OTHER;
- /*
- * Query: name, type (16), class (16)
- */
- if ((name_len = dn_expand(answer,answer+answer_len,pos,name,MAX_NAME)) < 0)
- return TRY_OTHER;
- pos += name_len;
- if (GET16(pos) != wanted || GET16(pos+2) != C_IN) return TRY_OTHER;
- pos += 4;
- /*
- * Iterate over answers until we find something we like, giving priority
- * to ATMA_AESA (until signaling is fixed to work with E.164 too)
- */
- found = NULL;
- while (answers--) {
- /*
- * RR: name, type (16), class (16), TTL (32), resource_len (16),
- * resource_data ...
- */
- if ((name_len = dn_expand(answer,answer+answer_len,pos,name,MAX_NAME))
- < 0) return TRY_OTHER;
- pos += name_len;
- data_len = GET16(pos+8);
- data = pos+10;
- pos = data+data_len;
- if (GET16(data-10) != wanted || GET16(data-8) != C_IN || !--data_len)
- continue;
- switch (wanted) {
- case T_NSAP:
- data_len++;
- if (data_len != ATM_ESA_LEN) continue;
- memcpy(((struct sockaddr_atmsvc *) result)->
- sas_addr.prv,data,ATM_ESA_LEN);
- return 0;
- case T_ATMA:
- switch (*data++) {
- case ATMA_AESA:
- if (data_len != ATM_ESA_LEN) continue;
- memcpy(((struct sockaddr_atmsvc *) result)->
- sas_addr.prv,data,ATM_ESA_LEN);
- return 0;
- case ATMA_E164:
- if (data_len > ATM_E164_LEN) continue;
- if (!found) {
- found = data;
- found_len = data_len;
- }
- break;
- default:
- continue;
- }
- case T_PTR:
- if (dn_expand(answer,answer+answer_len,data,result,
- res_len) < 0) return FATAL;
- return 0;
- default:
- continue;
- }
- }
- if (!found) return TRY_OTHER;
- memcpy(((struct sockaddr_atmsvc *) result)->sas_addr.pub,found,
- found_len);
- ((struct sockaddr_atmsvc *) result)->sas_addr.pub[found_len] = 0;
- return 0;
-}
-
-
-int ans_byname(const char *text,struct sockaddr_atmsvc *addr,int length,
- int flags)
-{
- if (!(flags & T2A_SVC) || length != sizeof(*addr)) return TRY_OTHER;
- memset(addr,0,sizeof(*addr));
- addr->sas_family = AF_ATMSVC;
- if (!ans(text,T_ATMA,addr,length)) return 0;
- return ans(text,T_NSAP,addr,length);
-}
-
-
-static int encode_nsap(char *buf,const unsigned char *addr)
-{
- static int fmt_dcc[] = { 2,12,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
- 4,2,0 };
- static int fmt_e164[] = { 2,12,1,1,1,1,1,1,1,1,16,2,0 };
- int *fmt;
- int pos,i,j;
-
- switch (*addr) {
- case ATM_AFI_DCC:
- case ATM_AFI_ICD:
- case ATM_AFI_LOCAL:
- case ATM_AFI_DCC_GROUP:
- case ATM_AFI_ICD_GROUP:
- case ATM_AFI_LOCAL_GROUP:
- fmt = fmt_dcc;
- break;
- case ATM_AFI_E164:
- case ATM_AFI_E164_GROUP:
- fmt = fmt_e164;
- break;
- default:
- return TRY_OTHER;
- }
- pos = 2*ATM_ESA_LEN;
- for (i = 0; fmt[i]; i++) {
- pos -= fmt[i];
- for (j = 0; j < fmt[i]; j++)
- sprintf(buf++,"%x",
- (addr[(pos+j) >> 1] >> 4*(1-((pos+j) & 1))) & 0xf);
- *buf++ = '.';
- }
- strcpy(buf,"AESA.ATMA.INT.");
- return 0;
-}
-
-
-static int encode_nsap_new(char *buf,const unsigned char *addr)
-{
- int i;
- int digit;
-
- for (i = 20; i; ) {
- i--;
- digit = addr[i] & 0x0F;
- *(buf++) = digit + (digit >= 10 ? '7' : '0');
- *(buf++) = '.';
- digit = ((unsigned char) (addr[i])) >> 4;
- *(buf++) = digit + (digit >= 10 ? '7' : '0');
- *(buf++) = '.';
- }
- strcpy (buf, "NSAP.INT.");
- return 0;
-}
-
-
-static int cc_len(int p0,int p1)
-{
- static char *cc_table = NULL;
- FILE *file;
- char buffer[MAX_LINE];
- char *here;
- int cc;
-
- if (!cc_table) {
- if (!(cc_table = malloc(100))) {
- perror("malloc");
- return E164_CC_DEFAULT_LEN;
- }
- memset(cc_table,E164_CC_DEFAULT_LEN,100);
- if (!(file = fopen(E164_CC_FILE,"r")))
- perror(E164_CC_FILE);
- else {
- while (fgets(buffer,MAX_LINE,file)) {
- here = strchr(buffer,'#');
- if (here) *here = 0;
- if (sscanf(buffer,"%d",&cc) == 1) {
- if (cc < 10) cc_table[cc] = 1;
- else if (cc < 100) cc_table[cc] = 2;
- else cc_table[cc/10] = 3;
- }
- }
- fclose(file);
- }
- }
- if (cc_table[p0] == 1) return 1;
- return cc_table[p0*10+p1];
-}
-
-
-static int encode_e164(char *buf,const char *addr)
-{
- const char *prefix,*here;
-
- prefix = addr+cc_len(addr[0]-48,addr[1]-48);
- here = strchr(addr,0);
- while (here > prefix) {
- *buf++ = *--here;
- *buf++ = '.';
- }
- while (here > addr) *buf++ = *addr++;
- strcpy(buf,".E164.ATMA.INT.");
- return 0;
-}
-
-
-int ans_byaddr(char *buffer,int length,const struct sockaddr_atmsvc *addr,
- int flags)
-{
- char tmp[MAX_NAME]; /* could be smaller ... */
- int res;
-
- if (addr->sas_addr.prv) {
- res = encode_nsap(tmp,addr->sas_addr.prv);
- if (!res && !ans(tmp,T_PTR,buffer,length)) return 0;
- res = encode_nsap_new(tmp,addr->sas_addr.prv);
- if (res < 0) return res;
- return ans(tmp,T_PTR,buffer,length);
- } else {
- res = encode_e164(tmp,addr->sas_addr.pub);
- if (res < 0) return res;
- return ans(tmp,T_PTR,buffer,length);
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-25 13:47:22 +0000