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-rw-r--r--sys/netinet/ip_ftp_pxy.c260
1 files changed, 0 insertions, 260 deletions
diff --git a/sys/netinet/ip_ftp_pxy.c b/sys/netinet/ip_ftp_pxy.c
deleted file mode 100644
index 917dbb2..0000000
--- a/sys/netinet/ip_ftp_pxy.c
+++ /dev/null
@@ -1,260 +0,0 @@
-/*
- * Simple FTP transparent proxy for in-kernel use. For use with the NAT
- * code.
- *
- * $FreeBSD$
- */
-
-#define isdigit(x) ((x) >= '0' && (x) <= '9')
-
-#define IPF_FTP_PROXY
-
-#define IPF_MINPORTLEN 18
-#define IPF_MAXPORTLEN 30
-
-
-int ippr_ftp_init __P((fr_info_t *, ip_t *, tcphdr_t *,
- ap_session_t *, nat_t *));
-int ippr_ftp_in __P((fr_info_t *, ip_t *, tcphdr_t *,
- ap_session_t *, nat_t *));
-int ippr_ftp_out __P((fr_info_t *, ip_t *, tcphdr_t *,
- ap_session_t *, nat_t *));
-u_short ipf_ftp_atoi __P((char **));
-
-
-/*
- * FTP application proxy initialization.
- */
-int ippr_ftp_init(fin, ip, tcp, aps, nat)
-fr_info_t *fin;
-ip_t *ip;
-tcphdr_t *tcp;
-ap_session_t *aps;
-nat_t *nat;
-{
- aps->aps_sport = tcp->th_sport;
- aps->aps_dport = tcp->th_dport;
- return 0;
-}
-
-
-int ippr_ftp_in(fin, ip, tcp, aps, nat)
-fr_info_t *fin;
-ip_t *ip;
-tcphdr_t *tcp;
-ap_session_t *aps;
-nat_t *nat;
-{
- u_32_t sum1, sum2;
- short sel;
-
- if (tcp->th_sport == aps->aps_dport) {
- sum2 = (u_32_t)ntohl(tcp->th_ack);
- sel = aps->aps_sel;
- if ((aps->aps_after[!sel] > aps->aps_after[sel]) &&
- (sum2 > aps->aps_after[!sel])) {
- sel = aps->aps_sel = !sel; /* switch to other set */
- }
- if (aps->aps_seqoff[sel] && (sum2 > aps->aps_after[sel])) {
- sum1 = (u_32_t)aps->aps_seqoff[sel];
- tcp->th_ack = htonl(sum2 - sum1);
- return 2;
- }
- }
- return 0;
-}
-
-
-/*
- * ipf_ftp_atoi - implement a version of atoi which processes numbers in
- * pairs separated by commas (which are expected to be in the range 0 - 255),
- * returning a 16 bit number combining either side of the , as the MSB and
- * LSB.
- */
-u_short ipf_ftp_atoi(ptr)
-char **ptr;
-{
- register char *s = *ptr, c;
- register u_char i = 0, j = 0;
-
- while ((c = *s++) && isdigit(c)) {
- i *= 10;
- i += c - '0';
- }
- if (c != ',') {
- *ptr = NULL;
- return 0;
- }
- while ((c = *s++) && isdigit(c)) {
- j *= 10;
- j += c - '0';
- }
- *ptr = s;
- return (i << 8) | j;
-}
-
-
-int ippr_ftp_out(fin, ip, tcp, aps, nat)
-fr_info_t *fin;
-ip_t *ip;
-tcphdr_t *tcp;
-ap_session_t *aps;
-nat_t *nat;
-{
- register u_32_t sum1, sum2;
- char newbuf[IPF_MAXPORTLEN+1];
- char portbuf[IPF_MAXPORTLEN+1], *s;
- int ch = 0, off = (ip->ip_hl << 2) + (tcp->th_off << 2);
- u_int a1, a2, a3, a4;
- u_short a5, a6;
- int olen, dlen, nlen = 0, inc = 0;
- tcphdr_t tcph, *tcp2 = &tcph;
- void *savep;
- nat_t *ipn;
- struct in_addr swip;
- mb_t *m = *(mb_t **)fin->fin_mp;
-
-#if SOLARIS
- mb_t *m1;
-
- /* skip any leading M_PROTOs */
- while(m && (MTYPE(m) != M_DATA))
- m = m->b_cont;
- PANIC((!m),("ippr_ftp_out: no M_DATA"));
-
- dlen = msgdsize(m) - off;
- bzero(portbuf, sizeof(portbuf));
- copyout_mblk(m, off, MIN(sizeof(portbuf), dlen), portbuf);
-#else
- dlen = mbufchainlen(m) - off;
- bzero(portbuf, sizeof(portbuf));
- m_copydata(m, off, MIN(sizeof(portbuf), dlen), portbuf);
-#endif
- portbuf[IPF_MAXPORTLEN] = '\0';
-
- if ((dlen < IPF_MINPORTLEN) || strncmp(portbuf, "PORT ", 5))
- goto adjust_seqack;
-
- /*
- * Skip the PORT command + space
- */
- s = portbuf + 5;
- /*
- * Pick out the address components, two at a time.
- */
- (void) ipf_ftp_atoi(&s);
- if (!s)
- goto adjust_seqack;
- (void) ipf_ftp_atoi(&s);
- if (!s)
- goto adjust_seqack;
- a5 = ipf_ftp_atoi(&s);
- if (!s)
- goto adjust_seqack;
- /*
- * check for CR-LF at the end.
- */
- if (*s != '\n' || *(s - 1) != '\r')
- goto adjust_seqack;
- a6 = a5 & 0xff;
- a5 >>= 8;
- /*
- * Calculate new address parts for PORT command
- */
- a1 = ntohl(ip->ip_src.s_addr);
- a2 = (a1 >> 16) & 0xff;
- a3 = (a1 >> 8) & 0xff;
- a4 = a1 & 0xff;
- a1 >>= 24;
- olen = s - portbuf + 1;
- (void) snprintf(newbuf, sizeof(newbuf), "PORT %d,%d,%d,%d,%d,%d\r\n",
- a1, a2, a3, a4, a5, a6);
- nlen = strlen(newbuf);
- inc = nlen - olen;
-#if SOLARIS
- for (m1 = m; m1->b_cont; m1 = m1->b_cont)
- ;
- if (inc > 0) {
- mblk_t *nm;
-
- /* alloc enough to keep same trailer space for lower driver */
- nm = allocb(nlen + m1->b_datap->db_lim - m1->b_wptr, BPRI_MED);
- PANIC((!nm),("ippr_ftp_out: allocb failed"));
-
- nm->b_band = m1->b_band;
- nm->b_wptr += nlen;
-
- m1->b_wptr -= olen;
- PANIC((m1->b_wptr < m1->b_rptr),("ippr_ftp_out: cannot handle fragmented data block"));
-
- linkb(m1, nm);
- } else {
- m1->b_wptr += inc;
- }
- copyin_mblk(m, off, nlen, newbuf);
-#else
- if (inc < 0)
- m_adj(m, inc);
- /* the mbuf chain will be extended if necessary by m_copyback() */
- m_copyback(m, off, nlen, newbuf);
-#endif
- if (inc) {
-#if SOLARIS || defined(__sgi)
- sum1 = ip->ip_len;
- sum2 = ip->ip_len + inc;
-
- /* Because ~1 == -2, We really need ~1 == -1 */
- if (sum1 > sum2)
- sum2--;
- sum2 -= sum1;
- sum2 = (sum2 & 0xffff) + (sum2 >> 16);
-
- fix_outcksum(&ip->ip_sum, sum2);
-#endif
- ip->ip_len += inc;
- }
- ch = 1;
-
- /*
- * Add skeleton NAT entry for connection which will come back the
- * other way.
- */
- savep = fin->fin_dp;
- fin->fin_dp = (char *)tcp2;
- bzero((char *)tcp2, sizeof(*tcp2));
- tcp2->th_sport = htons(a5 << 8 | a6);
- tcp2->th_dport = htons(20);
- swip = ip->ip_src;
- ip->ip_src = nat->nat_inip;
- if ((ipn = nat_new(nat->nat_ptr, ip, fin, IPN_TCP, NAT_OUTBOUND)))
- ipn->nat_age = fr_defnatage;
- (void) fr_addstate(ip, fin, FR_INQUE|FR_PASS|FR_QUICK|FR_KEEPSTATE);
- ip->ip_src = swip;
- fin->fin_dp = (char *)savep;
-
-adjust_seqack:
- if (tcp->th_dport == aps->aps_dport) {
- sum2 = (u_32_t)ntohl(tcp->th_seq);
- off = aps->aps_sel;
- if ((aps->aps_after[!off] > aps->aps_after[off]) &&
- (sum2 > aps->aps_after[!off])) {
- off = aps->aps_sel = !off; /* switch to other set */
- }
- if (aps->aps_seqoff[off]) {
- sum1 = (u_32_t)aps->aps_after[off] -
- aps->aps_seqoff[off];
- if (sum2 > sum1) {
- sum1 = (u_32_t)aps->aps_seqoff[off];
- sum2 += sum1;
- tcp->th_seq = htonl(sum2);
- ch = 1;
- }
- }
-
- if (inc && (sum2 > aps->aps_after[!off])) {
- aps->aps_after[!off] = sum2 + nlen - 1;
- aps->aps_seqoff[!off] = aps->aps_seqoff[off] + inc;
- }
- }
- return ch ? 2 : 0;
-}
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