2 * ----------------------------------------------------------------------------
3 * "THE BEER-WARE LICENSE" (Revision 42):
4 * <phk@login.dknet.dk> wrote this file. As long as you retain this notice you
5 * can do whatever you want with this stuff. If we meet some day, and you think
6 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
7 * ----------------------------------------------------------------------------
14 * Turned inside out. Now returns xfers as new file ids, not as a special
17 * $FreeBSD: src/lib/libftpio/ftpio.c,v 1.33.2.4 2002/07/25 15:25:32 ume Exp $
18 * $DragonFly: src/lib/libftpio/ftpio.c,v 1.8 2005/07/23 20:23:06 joerg Exp $
22 #include <sys/param.h>
23 #include <sys/socket.h>
25 #include <netinet/in.h>
27 #include <arpa/inet.h>
48 /* How to see by a given code whether or not the connection has timed out */
49 #define FTP_TIMEOUT(code) (FtpTimedOut || code == FTP_TIMED_OUT)
51 /* Internal routines - deal only with internal FTP_t type */
52 static FTP_t
ftp_new(void);
53 static void check_passive(FILE *fp
);
54 static int ftp_read_method(void *n
, char *buf
, int nbytes
);
55 static int ftp_write_method(void *n
, const char *buf
, int nbytes
);
56 static int ftp_close_method(void *n
);
57 static int writes(int fd
, const char *s
);
58 static char *get_a_line(FTP_t ftp
);
59 static int get_a_number(FTP_t ftp
, char **q
);
60 static int botch(const char *func
, const char *botch_state
);
61 static int cmd(FTP_t ftp
, const char *fmt
, ...);
62 static int ftp_login_session(FTP_t ftp
, const char *host
, int af
,
63 const char *user
, const char *passwd
,
64 int port
, int verbose
);
65 static int ftp_file_op(FTP_t ftp
, const char *operation
, const char *file
,
66 FILE **fp
, const char *mode
, off_t
*seekto
);
67 static int ftp_close(FTP_t ftp
);
68 static int get_url_info(const char *url_in
, char *host_ret
,
69 size_t host_len
, int *port_ret
,
70 char *name_ret
, size_t name_len
);
71 static void ftp_timeout(int sig
);
72 static void ftp_set_timeout(void);
73 static void ftp_clear_timeout(void);
74 static void ai_unmapped(struct addrinfo
*);
76 int networkInit(void);
79 /* Global status variable - ick */
82 /* FTP happy status codes */
83 #define FTP_GENERALLY_HAPPY 200
84 #define FTP_ASCII_HAPPY FTP_GENERALLY_HAPPY
85 #define FTP_BINARY_HAPPY FTP_GENERALLY_HAPPY
86 #define FTP_PORT_HAPPY FTP_GENERALLY_HAPPY
87 #define FTP_HAPPY_COMMENT 220
88 #define FTP_QUIT_HAPPY 221
89 #define FTP_TRANSFER_HAPPY 226
90 #define FTP_PASSIVE_HAPPY 227
91 #define FTP_LPASSIVE_HAPPY 228
92 #define FTP_EPASSIVE_HAPPY 229
93 #define FTP_CHDIR_HAPPY 250
95 /* FTP unhappy status codes */
96 #define FTP_TIMED_OUT 421
98 /* Placeholder in case we want to do any pre-init stuff at some point */
102 return SUCCESS
; /* XXX dummy function for now XXX */
105 /* Check a return code with some lenience for back-dated garbage that might be in the buffer */
107 check_code(FTP_t ftp
, int var
, int preferred
)
111 if (var
== preferred
)
113 else if (var
== FTP_TRANSFER_HAPPY
) /* last operation succeeded */
114 var
= get_a_number(ftp
, NULL
);
115 else if (var
== FTP_HAPPY_COMMENT
) /* chit-chat */
116 var
= get_a_number(ftp
, NULL
);
117 else if (var
== FTP_GENERALLY_HAPPY
) /* general success code */
118 var
= get_a_number(ftp
, NULL
);
129 FTP_t ftp
= fcookie(fp
);
134 i
= cmd(ftp
, "TYPE A");
135 if (i
< 0 || check_code(ftp
, i
, FTP_ASCII_HAPPY
))
137 ftp
->is_binary
= FALSE
;
144 FTP_t ftp
= fcookie(fp
);
149 i
= cmd(ftp
, "TYPE I");
150 if (i
< 0 || check_code(ftp
, i
, FTP_BINARY_HAPPY
))
152 ftp
->is_binary
= TRUE
;
156 ftpVerbose(FILE *fp
, int status
)
158 FTP_t ftp
= fcookie(fp
);
159 ftp
->is_verbose
= status
;
163 ftpChdir(FILE *fp
, char *dir
)
166 FTP_t ftp
= fcookie(fp
);
168 i
= cmd(ftp
, "CWD %s", dir
);
169 if (i
< 0 || check_code(ftp
, i
, FTP_CHDIR_HAPPY
))
177 FTP_t ftp
= fcookie(fp
);
182 ftpErrString(int error
)
187 return("connection in wrong state");
189 /* XXX soon UNIX errnos will catch up with FTP protocol errnos */
190 return strerror(error
);
191 for (k
= 0; k
< ftpErrListLength
; k
++)
192 if (ftpErrList
[k
].num
== error
)
193 return(ftpErrList
[k
].string
);
194 return("Unknown error");
198 ftpGetSize(FILE *fp
, const char *name
)
201 char p
[BUFSIZ
], *cp
, *ep
;
202 FTP_t ftp
= fcookie(fp
);
206 if ((size_t)snprintf(p
, sizeof(p
), "SIZE %s\r\n", name
) >= sizeof(p
))
209 fprintf(stderr
, "Sending %s", p
);
210 if (writes(ftp
->fd_ctrl
, p
))
212 i
= get_a_number(ftp
, &cp
);
213 if (check_code(ftp
, i
, 213))
216 errno
= 0; /* to check for ERANGE */
217 size
= (off_t
)strtoq(cp
, &ep
, 10);
218 if (*ep
!= '\0' || errno
== ERANGE
)
224 ftpGetModtime(FILE *fp
, const char *name
)
228 time_t t0
= time (0);
229 FTP_t ftp
= fcookie(fp
);
233 if ((size_t)snprintf(p
, sizeof(p
), "MDTM %s\r\n", name
) >= sizeof(p
))
236 fprintf(stderr
, "Sending %s", p
);
237 if (writes(ftp
->fd_ctrl
, p
))
239 i
= get_a_number(ftp
, &cp
);
240 if (check_code(ftp
, i
, 213))
242 while (*cp
&& !isdigit(*cp
))
246 t0
= localtime (&t0
)->tm_gmtoff
;
247 sscanf(cp
, "%04d%02d%02d%02d%02d%02d", &t
.tm_year
, &t
.tm_mon
, &t
.tm_mday
, &t
.tm_hour
, &t
.tm_min
, &t
.tm_sec
);
257 ftpGet(FILE *fp
, const char *file
, off_t
*seekto
)
260 FTP_t ftp
= fcookie(fp
);
263 if (ftpBinary(fp
) != SUCCESS
)
266 if (ftp_file_op(ftp
, "RETR", file
, &fp2
, "r", seekto
) == SUCCESS
)
271 /* Returns a standard FILE pointer type representing an open control connection */
273 ftpLogin(const char *host
, const char *user
, const char *passwd
, int port
,
274 int verbose
, int *retcode
)
277 return ftpLoginAf(host
, AF_UNSPEC
, user
, passwd
, port
, verbose
, retcode
);
279 return ftpLoginAf(host
, AF_INET
, user
, passwd
, port
, verbose
, retcode
);
284 ftpLoginAf(const char *host
, int af
, const char *user
, const char *passwd
,
285 int port
, int verbose
, int *retcode
)
292 if (networkInit() != SUCCESS
)
297 if (n
&& ftp_login_session(n
, host
, af
, user
, passwd
, port
, verbose
) == SUCCESS
) {
298 fp
= funopen(n
, ftp_read_method
, ftp_write_method
, NULL
, ftp_close_method
); /* BSD 4.4 function! */
302 *retcode
= (FtpTimedOut
? FTP_TIMED_OUT
: -1);
303 /* Poor attempt at mapping real errnos to FTP error codes */
304 else switch(n
->error
) {
306 *retcode
= FTP_TIMED_OUT
; /* Actually no such host, but we have no way of saying that. :-( */
310 *retcode
= FTP_TIMED_OUT
;
322 ftpPut(FILE *fp
, const char *file
)
325 FTP_t ftp
= fcookie(fp
);
328 if (ftp_file_op(ftp
, "STOR", file
, &fp2
, "w", NULL
) == SUCCESS
)
334 ftpPassive(FILE *fp
, int st
)
336 FTP_t ftp
= fcookie(fp
);
338 ftp
->is_passive
= !!st
; /* normalize "st" to zero or one */
343 ftpGetURL(const char *url
, const char *user
, const char *passwd
, int *retcode
)
346 return ftpGetURLAf(url
, AF_UNSPEC
, user
, passwd
, retcode
);
348 return ftpGetURLAf(url
, AF_INET
, user
, passwd
, retcode
);
353 ftpGetURLAf(const char *url
, int af
, const char *user
, const char *passwd
,
356 char host
[255], name
[255];
359 static FILE *fp
= NULL
;
360 static char *prev_host
;
364 if (get_url_info(url
, host
, sizeof(host
), &port
, name
,
365 sizeof(name
)) == SUCCESS
) {
366 if (fp
&& prev_host
) {
367 if (!strcmp(prev_host
, host
)) {
368 /* Try to use cached connection */
369 fp2
= ftpGet(fp
, name
, NULL
);
371 /* Connection timed out or was no longer valid */
380 /* It's a different host now, flush old */
386 fp
= ftpLoginAf(host
, af
, user
, passwd
, port
, 0, retcode
);
388 fp2
= ftpGet(fp
, name
, NULL
);
390 /* Connection timed out or was no longer valid */
392 *retcode
= ftpErrno(fp
);
397 prev_host
= strdup(host
);
405 ftpPutURL(const char *url
, const char *user
, const char *passwd
, int *retcode
)
408 return ftpPutURLAf(url
, AF_UNSPEC
, user
, passwd
, retcode
);
410 return ftpPutURLAf(url
, AF_INET
, user
, passwd
, retcode
);
416 ftpPutURLAf(const char *url
, int af
, const char *user
, const char *passwd
,
419 char host
[255], name
[255];
421 static FILE *fp
= NULL
;
426 if (fp
) { /* Close previous managed connection */
430 if (get_url_info(url
, host
, sizeof(host
), &port
,
431 name
, sizeof(name
)) == SUCCESS
) {
432 fp
= ftpLoginAf(host
, af
, user
, passwd
, port
, 0, retcode
);
434 fp2
= ftpPut(fp
, name
);
437 *retcode
= ftpErrno(fp
);
447 /* Internal workhorse function for dissecting URLs. Takes a URL as the first argument and returns the
448 result of such disection in the host, user, passwd, port and name variables. */
450 get_url_info(const char *url_in
, char *host_ret
, size_t host_len
,
451 int *port_ret
, char *name_ret
, size_t name_len
)
453 char *name
, *host
, *cp
, url
[BUFSIZ
];
457 /* XXX add http:// here or somewhere reasonable at some point XXX */
458 if (strncmp("ftp://", url_in
, 6) != 0)
460 /* We like to stomp a lot on the URL string in dissecting it, so copy it first */
461 strncpy(url
, url_in
, BUFSIZ
);
463 if ((cp
= index(host
, ':')) != NULL
) {
465 port
= strtol(cp
, 0, 0);
468 port
= 0; /* use default */
472 if ((name
= index(cp
? cp
: host
, '/')) != NULL
)
475 if (strlen(host
) >= host_len
)
477 strcpy(host_ret
, host
);
479 if (name
&& name_ret
) {
480 if (strlen(name
) >= name_len
)
482 strcpy(name_ret
, name
);
492 ftp
= (FTP_t
)malloc(sizeof *ftp
);
495 memset(ftp
, 0, sizeof *ftp
);
497 ftp
->con_state
= init
;
498 ftp
->is_binary
= FALSE
;
499 ftp
->is_passive
= FALSE
;
500 ftp
->is_verbose
= FALSE
;
506 ftp_read_method(void *vp
, char *buf
, int nbytes
)
512 i
= (fd
>= 0) ? read(fd
, buf
, nbytes
) : EOF
;
517 ftp_write_method(void *vp
, const char *buf
, int nbytes
)
523 i
= (fd
>= 0) ? write(fd
, buf
, nbytes
) : EOF
;
528 ftp_close_method(void *n
)
532 i
= ftp_close((FTP_t
)n
);
538 * This function checks whether the FTP_PASSIVE_MODE environment
539 * variable is set, and, if so, enforces the desired mode.
542 check_passive(FILE *fp
)
544 const char *cp
= getenv("FTP_PASSIVE_MODE");
547 ftpPassive(fp
, strncasecmp(cp
, "no", 2));
551 ftp_timeout(int sig __unused
)
554 /* Debug("ftp_pkg: ftp_timeout called - operation timed out"); */
558 ftp_set_timeout(void)
560 struct sigaction
new;
565 sigemptyset(&new.sa_mask
);
567 new.sa_handler
= ftp_timeout
;
568 sigaction(SIGALRM
, &new, NULL
);
569 cp
= getenv("FTP_TIMEOUT");
570 if (!cp
|| !(ival
= atoi(cp
)))
576 ftp_clear_timeout(void)
578 struct sigaction
new;
581 sigemptyset(&new.sa_mask
);
583 new.sa_handler
= SIG_DFL
;
584 sigaction(SIGALRM
, &new, NULL
);
588 writes(int fd
, const char *s
)
590 int n
, i
= strlen(s
);
595 if (FtpTimedOut
|| i
!= n
)
601 get_a_line(FTP_t ftp
)
603 static char buf
[BUFSIZ
];
606 /* Debug("ftp_pkg: trying to read a line from %d", ftp->fd_ctrl); */
607 for(i
= 0; i
< BUFSIZ
;) {
609 j
= read(ftp
->fd_ctrl
, buf
+ i
, 1);
611 if (FtpTimedOut
|| j
!= 1)
613 if (buf
[i
] == '\r' || buf
[i
] == '\n') {
617 if (ftp
->is_verbose
== TRUE
)
618 fprintf(stderr
, "%s\n",buf
+4);
623 /* Debug("ftp_pkg: read string \"%s\" from %d", buf, ftp->fd_ctrl); */
628 get_a_number(FTP_t ftp
, char **q
)
638 return FTP_TIMED_OUT
;
641 if (!(isdigit(p
[0]) && isdigit(p
[1]) && isdigit(p
[2])))
643 if (i
== -1 && p
[3] == '-') {
647 if (p
[3] != ' ' && p
[3] != '\t')
652 /* Debug("ftp_pkg: read reply %d from server (%s)", j, p); */
656 /* Debug("ftp_pkg: read reply %d from server (%s)", j, p); */
668 if (ftp
->con_state
== isopen
) {
669 ftp
->con_state
= quit
;
670 /* If last operation timed out, don't try to quit - just close */
671 if (ftp
->error
!= FTP_TIMED_OUT
)
672 i
= cmd(ftp
, "QUIT");
675 if (!check_code(ftp
, i
, FTP_QUIT_HAPPY
))
680 else if (ftp
->con_state
== quit
)
686 botch(const char *func __unused
, const char *botch_state __unused
)
688 /* Debug("ftp_pkg: botch: %s(%s)", func, botch_state); */
693 cmd(FTP_t ftp
, const char *fmt
, ...)
700 if ((size_t)vsnprintf(p
, sizeof p
- 2, fmt
, ap
) >= sizeof(p
) - 2)
704 if (ftp
->con_state
== init
)
705 return botch("cmd", "open");
709 fprintf(stderr
, "Sending: %s", p
);
710 if (writes(ftp
->fd_ctrl
, p
)) {
712 return FTP_TIMED_OUT
;
715 while ((i
= get_a_number(ftp
, NULL
)) == FTP_HAPPY_COMMENT
);
720 ftp_login_session(FTP_t ftp
, const char *host
, int af
,
721 const char *user
, const char *passwd
, int port
, int verbose
)
724 struct addrinfo hints
, *res
, *res0
;
729 if (networkInit() != SUCCESS
)
732 if (ftp
->con_state
!= init
) {
747 if ((size_t)snprintf(pbuf
, sizeof(pbuf
), "%d", port
) >= sizeof(pbuf
))
749 memset(&hints
, 0, sizeof(hints
));
750 hints
.ai_family
= af
;
751 hints
.ai_socktype
= SOCK_STREAM
;
752 hints
.ai_protocol
= 0;
753 err
= getaddrinfo(host
, pbuf
, &hints
, &res0
);
760 for (res
= res0
; res
; res
= res
->ai_next
) {
762 ftp
->addrtype
= res
->ai_family
;
764 if ((s
= socket(res
->ai_family
, res
->ai_socktype
,
765 res
->ai_protocol
)) < 0)
768 if (connect(s
, res
->ai_addr
, res
->ai_addrlen
) < 0) {
783 ftp
->con_state
= isopen
;
784 ftp
->is_verbose
= verbose
;
786 i
= cmd(ftp
, "USER %s", user
);
787 if (i
>= 300 && i
< 400)
788 i
= cmd(ftp
, "PASS %s", passwd
);
789 if (i
>= 299 || i
< 0) {
799 ftp_file_op(FTP_t ftp
, const char *operation
, const char *file
, FILE **fp
,
800 const char *mode
, off_t
*seekto
)
804 unsigned char addr
[64];
806 struct sockaddr_in sin4
;
807 struct sockaddr_in6 sin6
;
815 if (ftp
->con_state
!= isopen
)
816 return botch("ftp_file_op", "open");
818 if ((s
= socket(ftp
->addrtype
, SOCK_STREAM
, 0)) < 0) {
823 if (ftp
->is_passive
) {
824 if (ftp
->addrtype
== AF_INET
) {
826 fprintf(stderr
, "Sending PASV\n");
827 if (writes(ftp
->fd_ctrl
, "PASV\r\n")) {
830 ftp
->error
= FTP_TIMED_OUT
;
831 return FTP_TIMED_OUT
;
833 i
= get_a_number(ftp
, &q
);
834 if (check_code(ftp
, i
, FTP_PASSIVE_HAPPY
)) {
841 fprintf(stderr
, "Sending EPSV\n");
842 if (writes(ftp
->fd_ctrl
, "EPSV\r\n")) {
845 ftp
->error
= FTP_TIMED_OUT
;
846 return FTP_TIMED_OUT
;
848 i
= get_a_number(ftp
, &q
);
849 if (check_code(ftp
, i
, FTP_EPASSIVE_HAPPY
)) {
851 fprintf(stderr
, "Sending LPSV\n");
852 if (writes(ftp
->fd_ctrl
, "LPSV\r\n")) {
855 ftp
->error
= FTP_TIMED_OUT
;
856 return FTP_TIMED_OUT
;
858 i
= get_a_number(ftp
, &q
);
859 if (check_code(ftp
, i
, FTP_LPASSIVE_HAPPY
)) {
867 if (strcmp(cmdstr
, "PASV") == 0 || strcmp(cmdstr
, "LPSV") == 0) {
868 while (*q
&& !isdigit(*q
))
875 l
= (ftp
->addrtype
== AF_INET
? 6 : 21);
876 for (i
= 0; i
< l
; i
++) {
878 addr
[i
] = strtol(q
, &q
, 10);
881 sin
.sin4
.sin_family
= ftp
->addrtype
;
882 if (ftp
->addrtype
== AF_INET6
) {
883 sin
.sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
884 bcopy(addr
+ 2, (char *)&sin
.sin6
.sin6_addr
, 16);
885 bcopy(addr
+ 19, (char *)&sin
.sin6
.sin6_port
, 2);
887 sin
.sin4
.sin_len
= sizeof(struct sockaddr_in
);
888 bcopy(addr
, (char *)&sin
.sin4
.sin_addr
, 4);
889 bcopy(addr
+ 4, (char *)&sin
.sin4
.sin_port
, 2);
891 } else if (strcmp(cmdstr
, "EPSV") == 0) {
894 while (*q
&& *q
!= '(') /* ) */
901 if (sscanf(q
, "%c%c%c%d%c", &addr
[0], &addr
[1], &addr
[2],
902 &port
, &addr
[3]) != 5
903 || addr
[0] != addr
[1] || addr
[0] != addr
[2] || addr
[0] != addr
[3]) {
907 sinlen
= sizeof(sin
);
908 if (getpeername(ftp
->fd_ctrl
, (struct sockaddr
*)&sin
, &sinlen
) < 0) {
912 switch (sin
.sin4
.sin_family
) {
914 sin
.sin4
.sin_port
= htons(port
);
917 sin
.sin6
.sin6_port
= htons(port
);
925 if (connect(s
, (struct sockaddr
*)&sin
, sin
.sin4
.sin_len
) < 0) {
930 if (seekto
&& *seekto
) {
931 i
= cmd(ftp
, "REST %d", *seekto
);
932 if (i
< 0 || FTP_TIMEOUT(i
)) {
939 i
= cmd(ftp
, "%s %s", operation
, file
);
940 if (i
< 0 || i
> 299) {
945 *fp
= fdopen(s
, mode
);
950 #ifdef IPV6_PORTRANGE
951 if (ftp
->addrtype
== AF_INET6
) {
952 portrange
= IPV6_PORTRANGE_HIGH
;
953 if (setsockopt(s
, IPPROTO_IPV6
, IPV6_PORTRANGE
, (char *)
954 &portrange
, sizeof(portrange
)) < 0) {
961 if (ftp
->addrtype
== AF_INET
) {
962 portrange
= IP_PORTRANGE_HIGH
;
963 if (setsockopt(s
, IPPROTO_IP
, IP_PORTRANGE
, (char *)
964 &portrange
, sizeof(portrange
)) < 0) {
972 getsockname(ftp
->fd_ctrl
, (struct sockaddr
*)&sin
, &i
);
973 sin
.sin4
.sin_port
= 0;
974 i
= ((struct sockaddr
*)&sin
)->sa_len
;
975 if (bind(s
, (struct sockaddr
*)&sin
, i
) < 0) {
980 getsockname(s
,(struct sockaddr
*)&sin
,&i
);
981 if (listen(s
, 1) < 0) {
985 if (sin
.sin4
.sin_family
== AF_INET
) {
987 a
= ntohl(sin
.sin4
.sin_addr
.s_addr
);
988 i
= cmd(ftp
, "PORT %d,%d,%d,%d,%d,%d",
993 (ntohs(sin
.sin4
.sin_port
) >> 8) & 0xff,
994 ntohs(sin
.sin4
.sin_port
) & 0xff);
995 if (check_code(ftp
, i
, FTP_PORT_HAPPY
)) {
1000 #define UC(b) (((int)b)&0xff)
1002 char hname
[INET6_ADDRSTRLEN
];
1004 sin
.sin6
.sin6_scope_id
= 0;
1005 if (getnameinfo((struct sockaddr
*)&sin
, sin
.sin6
.sin6_len
,
1006 hname
, sizeof(hname
),
1007 NULL
, 0, NI_NUMERICHOST
) != 0) {
1010 i
= cmd(ftp
, "EPRT |%d|%s|%d|", 2, hname
,
1011 htons(sin
.sin6
.sin6_port
));
1012 if (check_code(ftp
, i
, FTP_PORT_HAPPY
)) {
1014 a
= (char *)&sin
.sin6
.sin6_addr
;
1016 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
1018 UC(a
[0]),UC(a
[1]),UC(a
[2]),UC(a
[3]),
1019 UC(a
[4]),UC(a
[5]),UC(a
[6]),UC(a
[7]),
1020 UC(a
[8]),UC(a
[9]),UC(a
[10]),UC(a
[11]),
1021 UC(a
[12]),UC(a
[13]),UC(a
[14]),UC(a
[15]),
1023 (ntohs(sin
.sin4
.sin_port
) >> 8) & 0xff,
1024 ntohs(sin
.sin4
.sin_port
) & 0xff);
1025 if (check_code(ftp
, i
, FTP_PORT_HAPPY
)) {
1031 if (seekto
&& *seekto
) {
1032 i
= cmd(ftp
, "REST %d", *seekto
);
1033 if (i
< 0 || FTP_TIMEOUT(i
)) {
1041 i
= cmd(ftp
, "%s %s", operation
, file
);
1042 if (i
< 0 || i
> 299) {
1047 fd
= accept(s
, 0, 0);
1054 *fp
= fdopen(fd
, mode
);
1063 ai_unmapped(struct addrinfo
*ai
)
1065 struct sockaddr_in6
*sin6
;
1066 struct sockaddr_in sin
;
1068 if (ai
->ai_family
!= AF_INET6
)
1070 if (ai
->ai_addrlen
!= sizeof(struct sockaddr_in6
) ||
1071 sizeof(sin
) > ai
->ai_addrlen
)
1073 sin6
= (struct sockaddr_in6
*)ai
->ai_addr
;
1074 if (!IN6_IS_ADDR_V4MAPPED(&sin6
->sin6_addr
))
1077 memset(&sin
, 0, sizeof(sin
));
1078 sin
.sin_family
= AF_INET
;
1079 sin
.sin_len
= sizeof(struct sockaddr_in
);
1080 memcpy(&sin
.sin_addr
, &sin6
->sin6_addr
.s6_addr
[12],
1081 sizeof(sin
.sin_addr
));
1082 sin
.sin_port
= sin6
->sin6_port
;
1084 ai
->ai_family
= AF_INET
;
1085 memcpy(ai
->ai_addr
, &sin
, sin
.sin_len
);
1086 ai
->ai_addrlen
= sin
.sin_len
;