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1ed2a80fe1
ftp/ipv6-usagi-20010122.diff

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--- netkit-combo/netkit-ftp/ftp/cmds.c:1.1.1.1 Sat Nov 4 04:18:15 2000
+++ netkit-combo/netkit-ftp/ftp/cmds.c Sat Jan 13 06:36:27 2001
@@ -190,7 +192,7 @@
setpeer(int argc, char *argv[])
{
char *host;
- unsigned short port;
+ char *port;
if (connected) {
printf("Already connected to %s, use close first.\n",
@@ -205,22 +207,17 @@
code = -1;
return;
}
- port = ftp_port;
+ port = NULL;
if (argc > 2) {
- port = atoi(argv[2]);
- if (port < 1) {
- printf("%s: bad port number-- %s\n", argv[1], argv[2]);
- printf ("usage: %s host-name [port]\n", argv[0]);
- code = -1;
- return;
- }
- port = htons(port);
+ port = argv[2];
}
host = hookup(argv[1], port);
if (host) {
int overbose;
connected = 1;
+ try_epsv = 1;
+ try_eprt = 1;
/*
* Set up defaults for FTP.
*/
--- netkit-combo/netkit-ftp/ftp/ftp.c:1.1.1.1 Sat Nov 4 04:18:15 2000
+++ netkit-combo/netkit-ftp/ftp/ftp.c Sat Jan 13 06:36:27 2001
@@ -65,12 +96,26 @@
#include "../version.h"
+union sockunion {
+ struct sockinet {
+ u_short si_family;
+ u_short si_port;
+ } su_si;
+ struct sockaddr su_sa;
+ struct sockaddr_in su_sin;
+ struct sockaddr_in6 su_sin6;
+};
+#define su_family su_sa.sa_family
+#define su_port su_si.si_port
+
+#define ex_af2prot(a) (a == AF_INET ? 1 : (a == AF_INET6 ? 2 : 0))
+
int data = -1;
off_t restart_point = 0;
-static struct sockaddr_in hisctladdr;
-static struct sockaddr_in data_addr;
-static struct sockaddr_in myctladdr;
+static union sockunion hisctladdr;
+static union sockunion data_addr;
+static union sockunion myctladdr;
static int ptflag = 0;
static sigjmp_buf recvabort;
static sigjmp_buf sendabort;
@@ -96,79 +147,119 @@
static FILE *dataconn(const char *);
char *
-hookup(char *host, int port)
+hookup(const char *host, const char *port)
{
- register struct hostent *hp = 0;
- int s, tos;
+ int s, tos, error;
socklen_t len;
static char hostnamebuf[256];
-
+ struct addrinfo hints, *res, *res0;
+ char hbuf[MAXHOSTNAMELEN], pbuf[NI_MAXSERV];
+ char *cause = "ftp: unknown";
+
+ if (port) {
+ strncpy(pbuf, port, sizeof(pbuf) - 1);
+ pbuf[sizeof(pbuf) - 1] = '\0';
+ } else {
+ sprintf(pbuf, "%d", ntohs(ftp_port));
+ }
memset(&hisctladdr, 0, sizeof(hisctladdr));
- if (inet_aton(host, &hisctladdr.sin_addr)) {
- hisctladdr.sin_family = AF_INET;
- strncpy(hostnamebuf, host, sizeof(hostnamebuf));
- hostnamebuf[sizeof(hostnamebuf)-1]=0;
- }
- else {
- hp = gethostbyname(host);
- if (hp == NULL) {
- fprintf(stderr, "ftp: %s: ", host);
- herror((char *)NULL);
- code = -1;
- return((char *) 0);
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_flags = AI_CANONNAME;
+ hints.ai_socktype = SOCK_STREAM;
+ error = getaddrinfo(host, pbuf, &hints, &res0);
+ if (error) {
+ if (port) {
+ strcpy(hbuf, " ");
+ } else {
+ hbuf[0] = '\0';
+ pbuf[0] = '\0';
}
- hisctladdr.sin_family = hp->h_addrtype;
- if (hp->h_length > (int)sizeof(hisctladdr.sin_addr)) {
- hp->h_length = sizeof(hisctladdr.sin_addr);
- }
- memcpy(&hisctladdr.sin_addr, hp->h_addr_list[0], hp->h_length);
- (void) strncpy(hostnamebuf, hp->h_name, sizeof(hostnamebuf));
- hostnamebuf[sizeof(hostnamebuf)-1] = 0;
- }
- hostname = hostnamebuf;
- s = socket(hisctladdr.sin_family, SOCK_STREAM, 0);
- if (s < 0) {
- perror("ftp: socket");
+ fprintf(stderr, "ftp: %s%s%s: %s\n", host, hbuf, pbuf,
+ gai_strerror(error));
code = -1;
return (0);
}
- hisctladdr.sin_port = port;
- while (connect(s, (struct sockaddr *)&hisctladdr, sizeof (hisctladdr)) < 0) {
- if (hp && hp->h_addr_list[1]) {
- int oerrno = errno;
-
- fprintf(stderr, "ftp: connect to address %s: ",
- inet_ntoa(hisctladdr.sin_addr));
- errno = oerrno;
- perror((char *) 0);
- hp->h_addr_list++;
- memcpy(&hisctladdr.sin_addr, hp->h_addr_list[0],
- hp->h_length);
- fprintf(stdout, "Trying %s...\n",
- inet_ntoa(hisctladdr.sin_addr));
- (void) close(s);
- s = socket(hisctladdr.sin_family, SOCK_STREAM, 0);
- if (s < 0) {
- perror("ftp: socket");
- code = -1;
- return (0);
+
+ if (res0->ai_canonname) {
+ struct addrinfo h, *a;
+ memset(&h, 0, sizeof(h));
+ h.ai_family = PF_UNSPEC;
+ h.ai_socktype = SOCK_STREAM;
+ h.ai_flags = AI_NUMERICHOST;
+ if (!getaddrinfo(res0->ai_canonname, NULL, &h, &a)) {
+ strncpy(hostnamebuf, res0->ai_canonname, sizeof(hostnamebuf));
+ freeaddrinfo(a);
+ } else
+ strncpy(hostnamebuf, host, sizeof(hostnamebuf));
+ }
+ else
+ strncpy(hostnamebuf, host, sizeof(hostnamebuf));
+ hostnamebuf[sizeof(hostnamebuf) - 1] = '\0';
+ hostname = hostnamebuf;
+
+ s = -1;
+ for (res = res0; res; res = res->ai_next) {
+ if (!ex_af2prot(res->ai_family)) {
+ cause = "ftp: mismatch address family";
+ errno = EPROTONOSUPPORT;
+ continue;
+ }
+ if ((size_t)res->ai_addrlen > sizeof(hisctladdr)) {
+ cause = "ftp: mismatch struct sockaddr size";
+ errno = EPROTO;
+ continue;
+ }
+ if (getnameinfo(res->ai_addr, res->ai_addrlen,
+ hbuf, sizeof(hbuf), NULL, 0,
+ NI_NUMERICHOST))
+ strcpy(hbuf, "???");
+ if (res0->ai_next) /* if we have multiple possibilities */
+ fprintf(stdout, "Trying %s...\n", hbuf);
+ s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
+ if (s < 0) {
+ cause = "ftp: socket";
+ continue;
+ }
+ while ((error = connect(s, res->ai_addr, res->ai_addrlen)) < 0
+ && errno == EINTR) {
+ ;
+ }
+ if (error) {
+ /* this "if" clause is to prevent print warning twice */
+ if (res->ai_next) {
+ fprintf(stderr,
+ "ftp: connect to address %s", hbuf);
+ perror("");
}
+ cause = "ftp: connect";
+ close(s);
+ s = -1;
continue;
}
- perror("ftp: connect");
+ /* finally we got one */
+ break;
+ }
+ if (s < 0) {
+ perror(cause);
code = -1;
- goto bad;
+ freeaddrinfo(res0);
+ return NULL;
}
- len = sizeof (myctladdr);
+ len = res->ai_addrlen;
+ memcpy(&hisctladdr, res->ai_addr, len);
+ freeaddrinfo(res0);
if (getsockname(s, (struct sockaddr *)&myctladdr, &len) < 0) {
perror("ftp: getsockname");
code = -1;
goto bad;
}
#ifdef IP_TOS
+ if (hisctladdr.su_family == AF_INET)
+ {
tos = IPTOS_LOWDELAY;
if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, sizeof(int)) < 0)
perror("ftp: setsockopt TOS (ignored)");
+ }
#endif
cin = fdopen(s, "r");
cout = fdopen(s, "w");
@@ -182,7 +273,7 @@
goto bad;
}
if (verbose)
- printf("Connected to %s.\n", hostname);
+ printf("Connected to %s (%s).\n", hostname, hbuf);
if (getreply(0) > 2) { /* read startup message from server */
if (cin)
(void) fclose(cin);
@@ -392,8 +483,10 @@
}
if (dig < 4 && isdigit(c))
code = code * 10 + (c - '0');
- if (!pflag && code == 227)
+ if (!pflag && (code == 227 || code == 228))
pflag = 1;
+ else if (!pflag && code == 229)
+ pflag = 100;
if (dig > 4 && pflag == 1 && isdigit(c))
pflag = 2;
if (pflag == 2) {
@@ -405,6 +498,8 @@
pflag = 3;
}
}
+ if (pflag == 100 && c == '(')
+ pflag = 2;
if (dig == 4 && c == '-') {
if (continuation)
code = 0;
@@ -1083,15 +1178,23 @@
static int
initconn(void)
{
- register char *p, *a;
+ u_char *p, *a;
int result, tmpno = 0;
socklen_t len;
int on = 1;
- int tos;
- u_long a1,a2,a3,a4,p1,p2;
-
+ int tos, error = 0;
+ u_int ad[16], po[2], af, alen, plen;
+ char *pasvcmd = NULL;
+ char hbuf[MAXHOSTNAMELEN], pbuf[NI_MAXSERV];
+
+ if (myctladdr.su_family == AF_INET6
+ && (IN6_IS_ADDR_LINKLOCAL(&myctladdr.su_sin6.sin6_addr)
+ || IN6_IS_ADDR_SITELOCAL(&myctladdr.su_sin6.sin6_addr))) {
+ fprintf(stderr, "use of scoped address can be troublesome\n");
+ }
if (passivemode) {
- data = socket(AF_INET, SOCK_STREAM, 0);
+ data_addr = hisctladdr;
+ data = socket(data_addr.su_family, SOCK_STREAM, 0);
if (data < 0) {
perror("ftp: socket");
return(1);
@@ -1100,52 +1205,197 @@
setsockopt(data, SOL_SOCKET, SO_DEBUG, (char *)&on,
sizeof (on)) < 0)
perror("ftp: setsockopt (ignored)");
- if (command("PASV") != COMPLETE) {
+ switch (data_addr.su_family) {
+ case AF_INET:
+#if 0
+ if (try_epsv) {
+ result = command(pasvcmd = "EPSV 1");
+ if (code / 10 == 22 && code != 229) {
+ fprintf(stderr,
+ "wrong server: return code must be 229\n");
+ result = COMPLETE + 1;
+ }
+ } else {
+#endif
+ result = COMPLETE + 1;
+
+ if (result != COMPLETE) {
+ try_epsv = 0;
+ result = command(pasvcmd = "PASV");
+ }
+ break;
+ case AF_INET6:
+ if (try_epsv) {
+ result = command(pasvcmd = "EPSV 2");
+ if (code / 10 == 22 && code != 229) {
+ fprintf(stderr,
+ "wrong server: return code must be 229\n");
+ result = COMPLETE + 1;
+ }
+ } else {
+ result = COMPLETE + 1;
+ }
+ if (result != COMPLETE) {
+ try_epsv = 0;
+ result = command(pasvcmd = "LPSV");
+ }
+ break;
+ default:
+ result = COMPLETE + 1;
+ break;
+ }
+ if (result != COMPLETE) {
printf("Passive mode refused.\n");
- return(1);
+ goto bad;
}
+#define pack2(var) \
+ (((var[0] & 0xff) << 8) | ((var[1] & 0xff) << 0))
+#define pack4(var) \
+ ((((var)[0] & 0xff) << 24) | (((var)[1] & 0xff) << 16) | \
+ (((var)[2] & 0xff) << 8) | (((var)[3] & 0xff) << 0))
+
/*
* What we've got at this point is a string of comma separated
* one-byte unsigned integer values, separated by commas.
- * The first four are the an IP address. The fifth is the MSB
- * of the port number, the sixth is the LSB. From that we'll
- * prepare a sockaddr_in.
*/
-
- if (sscanf(pasv,"%ld,%ld,%ld,%ld,%ld,%ld",
- &a1,&a2,&a3,&a4,&p1,&p2)
- != 6)
- {
- printf("Passive mode address scan failure. Shouldn't happen!\n");
- return(1);
+ error = 0;
+ if (strcmp(pasvcmd, "PASV") == 0) {
+ if (data_addr.su_family != AF_INET) {
+ error = 2;
+ goto psv_done;
+ }
+ if (code / 10 == 22 && code != 227) {
+ error = 227;
+ goto psv_done;
+ }
+ if (sscanf(pasv, "%u,%u,%u,%u,%u,%u",
+ &ad[0], &ad[1], &ad[2], &ad[3],
+ &po[0], &po[1]) != 6) {
+ error = 1;
+ goto psv_done;
+ }
+ data_addr.su_sin.sin_addr.s_addr = htonl(pack4(ad));
+ data_addr.su_port = htons(pack2(po));
+ } else
+ if (strcmp(pasvcmd, "LPSV") == 0) {
+ if (code / 10 == 22 && code != 228) {
+ error = 228;
+ goto psv_done;
+ }
+ switch (data_addr.su_family) {
+ case AF_INET:
+ if (sscanf(pasv, "%u,%u,%u,%u,%u,%u,%u,%u,%u",
+ &af, &alen,
+ &ad[0], &ad[1], &ad[2], &ad[3],
+ &plen, &po[0], &po[1]) != 9) {
+ error = 1;
+ goto psv_done;
+ }
+ if (af != 4 || alen != 4 || plen != 2) {
+ error = 2;
+ goto psv_done;
+ }
+ data_addr.su_sin.sin_addr.s_addr =
+ htonl(pack4(ad));
+ data_addr.su_port = htons(pack2(po));
+ break;
+ case AF_INET6:
+ if (sscanf(pasv,
+ "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u",
+ &af, &alen,
+ &ad[0], &ad[1], &ad[2], &ad[3],
+ &ad[4], &ad[5], &ad[6], &ad[7],
+ &ad[8], &ad[9], &ad[10], &ad[11],
+ &ad[12], &ad[13], &ad[14], &ad[15],
+ &plen, &po[0], &po[1]) != 21) {
+ error = 1;
+ goto psv_done;
+ }
+ if (af != 6 || alen != 16 || plen != 2) {
+ error = 2;
+ goto psv_done;
+ }
+ data_addr.su_sin6.sin6_addr.s6_addr32[0] =
+ htonl(pack4(ad));
+ data_addr.su_sin6.sin6_addr.s6_addr32[1] =
+ htonl(pack4(ad+4));
+ data_addr.su_sin6.sin6_addr.s6_addr32[2] =
+ htonl(pack4(ad+8));
+ data_addr.su_sin6.sin6_addr.s6_addr32[3] =
+ htonl(pack4(ad+12));
+ data_addr.su_port = htons(pack2(po));
+ break;
+ default:
+ error = 1;
+ }
+ } else if (strncmp(pasvcmd, "EPSV", 4) == 0) {
+ char delim[4];
+ u_int epsvpo;
+
+ if (code / 10 == 22 && code != 229) {
+ error = 229;
+ goto psv_done;
+ }
+ if (sscanf(pasv, "%c%c%c%u%c", &delim[0], &delim[1],
+ &delim[2], &epsvpo, &delim[3]) != 5) {
+ error = 1;
+ goto psv_done;
+ }
+ if (delim[0] != delim[1] || delim[0] != delim[2]
+ || delim[0] != delim[3]) {
+ error = 1;
+ goto psv_done;
+ }
+ data_addr.su_port = htons(epsvpo);
+ } else {
+ error = 1;
+ }
+psv_done:
+ switch (error) {
+ case 0:
+ break;
+ case 1:
+ fprintf(stderr,
+ "Passive mode address scan failure. Shouldn't happen!\n");
+ goto bad;
+ case 2:
+ fprintf(stderr,
+ "Passive mode AF mismatch. Shouldn't happen!\n");
+ goto bad;
+ case 227:
+ case 228:
+ case 229:
+ fprintf(stderr,
+ "wrong server: return code must be %d\n", error);
+ goto bad;
+ default:
+ fprintf(stderr, "Bug\n");
}
- data_addr.sin_family = AF_INET;
- data_addr.sin_addr.s_addr = htonl((a1 << 24) | (a2 << 16) |
- (a3 << 8) | a4);
- data_addr.sin_port = htons((p1 << 8) | p2);
-
if (connect(data, (struct sockaddr *) &data_addr,
sizeof(data_addr))<0) {
perror("ftp: connect");
return(1);
}
#ifdef IP_TOS
+ if (data_addr.su_family == AF_INET)
+ {
tos = IPTOS_THROUGHPUT;
if (setsockopt(data, IPPROTO_IP, IP_TOS, (char *)&tos,
sizeof(tos)) < 0)
perror("ftp: setsockopt TOS (ignored)");
+ }
#endif
return(0);
}
noport:
data_addr = myctladdr;
if (sendport)
- data_addr.sin_port = 0; /* let system pick one */
+ data_addr.su_port = 0; /* let system pick one */
if (data != -1)
(void) close(data);
- data = socket(AF_INET, SOCK_STREAM, 0);
+ data = socket(data_addr.su_family, SOCK_STREAM, 0);
if (data < 0) {
perror("ftp: socket");
if (tmpno)
@@ -1172,13 +1426,45 @@
if (listen(data, 1) < 0)
perror("ftp: listen");
if (sendport) {
- a = (char *)&data_addr.sin_addr;
- p = (char *)&data_addr.sin_port;
-#define UC(b) (((int)b)&0xff)
- result =
- command("PORT %d,%d,%d,%d,%d,%d",
- UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
- UC(p[0]), UC(p[1]));
+ af = ex_af2prot(data_addr.su_family);
+ if (try_eprt && af > 1) { /* only IPv6 */
+ if (getnameinfo((struct sockaddr *)&data_addr, len,
+ hbuf, sizeof(hbuf), pbuf, sizeof(pbuf),
+ NI_NUMERICHOST | NI_NUMERICSERV) == 0) {
+ result = command("EPRT |%d|%s|%s|",
+ af, hbuf, pbuf);
+ if (result != COMPLETE) {
+ try_eprt = 0;
+ }
+ } else {
+ result = ERROR;
+ }
+ } else {
+ result = COMPLETE + 1;
+ }
+ if (result == COMPLETE)
+ goto prt_done;
+
+ p = (u_char *)&data_addr.su_port;
+ switch (data_addr.su_family) {
+ case AF_INET:
+ a = (u_char *)&data_addr.su_sin.sin_addr;
+ result = command("PORT %u,%u,%u,%u,%u,%u",
+ a[0], a[1], a[2], a[3], p[0], p[1]);
+ break;
+ case AF_INET6:
+ a = (u_char *)&data_addr.su_sin6.sin6_addr;
+ result = command(
+ "LPRT 6,16,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,2,%d,%d",
+ a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7],
+ a[8], a[9],a[10],a[11],a[12],a[13],a[14],a[15],
+ p[0], p[1]);
+ break;
+ default:
+ result = COMPLETE + 1; /* xxx */
+ }
+
+ prt_done:
if (result == ERROR && sendport == -1) {
sendport = 0;
tmpno = 1;
@@ -1189,9 +1477,12 @@
if (tmpno)
sendport = 1;
#ifdef IP_TOS
+ if (data_addr.su_family == AF_INET)
+ {
on = IPTOS_THROUGHPUT;
if (setsockopt(data, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int)) < 0)
perror("ftp: setsockopt TOS (ignored)");
+ }
#endif
return (0);
bad:
@@ -1204,7 +1495,7 @@
static FILE *
dataconn(const char *lmode)
{
- struct sockaddr_in from;
+ union sockunion from;
int s, tos;
socklen_t fromlen = sizeof(from);
@@ -1220,9 +1511,12 @@
(void) close(data);
data = s;
#ifdef IP_TOS
+ if (from.su_family == AF_INET)
+ {
tos = IPTOS_THROUGHPUT;
if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, sizeof(int)) < 0)
perror("ftp: setsockopt TOS (ignored)");
+ }
#endif
return (fdopen(data, lmode));
}
@@ -1284,8 +1578,8 @@
static struct comvars {
int connect;
char name[MAXHOSTNAMELEN];
- struct sockaddr_in mctl;
- struct sockaddr_in hctl;
+ union sockunion mctl;
+ union sockunion hctl;
FILE *in;
FILE *out;
int tpe;
@@ -1323,7 +1617,7 @@
connected = op->connect;
if (hostname) {
(void) strncpy(ip->name, hostname, sizeof(ip->name) - 1);
- ip->name[strlen(ip->name)] = '\0';
+ ip->name[sizeof(ip->name) - 1] = '\0';
}
else {
ip->name[0] = 0;
@@ -1352,18 +1646,18 @@
ip->ntflg = ntflag;
ntflag = op->ntflg;
(void) strncpy(ip->nti, ntin, 16);
- (ip->nti)[strlen(ip->nti)] = '\0';
+ (ip->nti)[16] = '\0'; /* shouldn't use strlen */
(void) strcpy(ntin, op->nti);
(void) strncpy(ip->nto, ntout, 16);
- (ip->nto)[strlen(ip->nto)] = '\0';
+ (ip->nto)[16] = '\0';
(void) strcpy(ntout, op->nto);
ip->mapflg = mapflag;
mapflag = op->mapflg;
(void) strncpy(ip->mi, mapin, MAXPATHLEN - 1);
- (ip->mi)[strlen(ip->mi)] = '\0';
+ (ip->mi)[MAXPATHLEN - 1] = '\0';
(void) strcpy(mapin, op->mi);
(void) strncpy(ip->mo, mapout, MAXPATHLEN - 1);
- (ip->mo)[strlen(ip->mo)] = '\0';
+ (ip->mo)[MAXPATHLEN - 1] = '\0';
(void) strcpy(mapout, op->mo);
(void) signal(SIGINT, oldintr);
if (abrtflag) {
--- netkit-combo/netkit-ftp/ftp/ftp_var.h:1.1.1.1 Sat Nov 4 04:18:15 2000
+++ netkit-combo/netkit-ftp/ftp/ftp_var.h Sat Jan 13 06:36:27 2001
@@ -112,6 +114,8 @@
Extern int mflag; /* flag: if != 0, then active multi command */
Extern int options; /* used during socket creation */
+Extern int try_epsv; /* try EPSV for this session */
+Extern int try_eprt; /* try EPRT for this session */
/*
* Format of command table.
@@ -140,7 +144,7 @@
Extern char macbuf[4096];
#define MACBUF_SIZE 4096
-char *hookup(char *host, int port);
+char *hookup(const char *host, const char *port);
struct cmd *getcmd(const char *);
char **makeargv(int *pargc, char **parg);
int dologin(const char *host);
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