diff options
Diffstat (limited to 'Src/Modules/tcp.c')
| -rw-r--r-- | Src/Modules/tcp.c | 159 |
1 files changed, 119 insertions, 40 deletions
diff --git a/Src/Modules/tcp.c b/Src/Modules/tcp.c index ab87a98c0..8ff481b09 100644 --- a/Src/Modules/tcp.c +++ b/Src/Modules/tcp.c @@ -89,11 +89,11 @@ int h_errno; mod_export char const * zsh_inet_ntop(int af, void const *cp, char *buf, size_t len) { - if(af != AF_INET) { + if (af != AF_INET) { errno = EAFNOSUPPORT; return NULL; } - if(len < INET_ADDRSTRLEN) { + if (len < INET_ADDRSTRLEN) { errno = ENOSPC; return NULL; } @@ -111,14 +111,11 @@ zsh_inet_ntop(int af, void const *cp, char *buf, size_t len) #endif /* !HAVE_INET_NTOP */ /**/ -#ifndef HAVE_INET_PTON - -/**/ -# ifndef HAVE_INET_ATON +#ifndef HAVE_INET_ATON -# ifndef INADDR_NONE -# define INADDR_NONE 0xffffffffUL -# endif +# ifndef INADDR_NONE +# define INADDR_NONE 0xffffffffUL +# endif /**/ mod_export int zsh_inet_aton(char const *src, struct in_addr *dst) @@ -133,13 +130,16 @@ mod_export int zsh_inet_aton(char const *src, struct in_addr *dst) # define zsh_inet_aton inet_aton /**/ -# endif /* !HAVE_INET_ATON */ +#endif /* !HAVE_INET_ATON */ + +/**/ +#ifndef HAVE_INET_PTON /**/ mod_export int zsh_inet_pton(int af, char const *src, void *dst) { - if(af != AF_INET) { + if (af != AF_INET) { errno = EAFNOSUPPORT; return -1; } @@ -163,7 +163,7 @@ zsh_inet_pton(int af, char const *src, void *dst) mod_export struct hostent * zsh_gethostbyname2(char const *name, int af) { - if(af != AF_INET) { + if (af != AF_INET) { h_errno = NO_RECOVERY; return NULL; } @@ -196,7 +196,7 @@ zsh_getipnodebyname(char const *name, int af, int flags, int *errorp) static char pbuf[INET_ADDRSTRLEN]; # endif struct hostent *he; - if(zsh_inet_pton(af, name, nbuf) == 1) { + if (zsh_inet_pton(af, name, nbuf) == 1) { zsh_inet_ntop(af, nbuf, pbuf, sizeof(pbuf)); ahe.h_name = pbuf; ahe.h_aliases = addrlist+1; @@ -206,7 +206,7 @@ zsh_getipnodebyname(char const *name, int af, int flags, int *errorp) return &ahe; } he = zsh_gethostbyname2(name, af); - if(!he) + if (!he) *errorp = h_errno; return he; } @@ -247,12 +247,12 @@ zts_alloc(int ztflags) Tcp_session sess; sess = (Tcp_session)zcalloc(sizeof(struct tcp_session)); - if(!sess) return NULL; + if (!sess) return NULL; sess->fd=-1; sess->next=NULL; sess->flags=ztflags; - if(!zts_head()) { + if (!zts_head()) { ztcp_head = ztcp_tail = sess; } else { @@ -268,7 +268,7 @@ tcp_socket(int domain, int type, int protocol, int ztflags) Tcp_session sess; sess = zts_alloc(ztflags); - if(!sess) return NULL; + if (!sess) return NULL; sess->fd = socket(domain, type, protocol); return sess; @@ -281,7 +281,7 @@ zts_delete(Tcp_session sess) tsess = zts_head(); - if(tsess == sess) + if (tsess == sess) { ztcp_head = sess->next; free(sess); @@ -293,7 +293,7 @@ zts_delete(Tcp_session sess) tsess = zts_next(tsess); } - if(!tsess->next) return 1; + if (!tsess->next) return 1; tsess->next = tsess->next->next; free(tsess->next); @@ -309,7 +309,7 @@ zts_byfd(int fd) tsess = zts_head(); do { - if(tsess->fd == fd) + if (tsess->fd == fd) return tsess; tsess = zts_next(tsess); @@ -338,10 +338,10 @@ tcp_close(Tcp_session sess) { int err; - if(sess->fd != -1) + if (sess->fd != -1) { err = close(sess->fd); - if(err) + if (err) { zwarn("connection close failed: %e", NULL, errno); return -1; @@ -358,7 +358,7 @@ tcp_connect(Tcp_session sess, char *addrp, struct hostent *zhost, int d_port) { int salen; #ifdef SUPPORT_IPV6 - if(zhost->h_addrtype==AF_INET6) { + if (zhost->h_addrtype==AF_INET6) { memcpy(&(sess->peer.in6.sin6_addr), addrp, zhost->h_length); sess->peer.in6.sin6_port = d_port; sess->peer.in6.sin6_flowinfo = 0; @@ -381,9 +381,9 @@ tcp_connect(Tcp_session sess, char *addrp, struct hostent *zhost, int d_port) static int bin_ztcp(char *nam, char **args, char *ops, int func) { - int herrno, err=1, destport, force=0, verbose=0, len; - char **addrp, *desthost; - struct hostent *zthost = NULL; + int herrno, err=1, destport, force=0, verbose=0, len, rfd; + char **addrp, *desthost, *localname, *remotename; + struct hostent *zthost = NULL, *ztpeer = NULL; Tcp_session sess; if (ops['f']) @@ -400,9 +400,9 @@ bin_ztcp(char *nam, char **args, char *ops, int func) int targetfd = atoi(args[0]); sess = zts_byfd(targetfd); - if(sess) + if (sess) { - if((sess->flags & ZTCP_ZFTP) && !force) + if ((sess->flags & ZTCP_ZFTP) && !force) { zwarnnam(nam, "use -f to force closure of a zftp control connection", NULL, 0); return 1; @@ -418,16 +418,93 @@ bin_ztcp(char *nam, char **args, char *ops, int func) } } } + else if (ops['l']) { + int lport; + + if (!args[0]) { + zwarnnam(nam, "-l requires an argument", NULL, 0); + return 1; + } + lport = atoi(args[0]); + if (!lport) { + zwarnnam(nam, "bad port number", NULL, 0); + return 1; + } + sess = tcp_socket(PF_INET, SOCK_STREAM, 0, 0); + + if (!sess) { + zwarnnam(nam, "unable to allocate a TCP session slot", NULL, 0); + return 1; + } +#ifdef SO_OOBINLINE + len = 1; + setsockopt(sess->fd, SOL_SOCKET, SO_OOBINLINE, (char *)&len, sizeof(len)); +#endif + if (!zsh_inet_aton("0.0.0.0", &(sess->sock.in.sin_addr))) + { + zwarnnam(nam, "bad address: %s", "0.0.0.0", 0); + return 1; + } + + sess->sock.in.sin_family = AF_INET; + sess->sock.in.sin_port = htons(lport); + + + if (bind(sess->fd, (struct sockaddr *)&sess->sock.in, sizeof(struct sockaddr_in))) + { + zwarnnam(nam, "could not bind to %s: %e", "0.0.0.0", errno); + tcp_close(sess); + return 1; + } + + if (listen(sess->fd, 1)) + { + zwarnnam(nam, "could not listen on socket: %e", NULL, errno); + tcp_close(sess); + return 1; + } + + if ((rfd = accept(sess->fd, (struct sockaddr *)&sess->peer.in, &len)) == -1) + { + zwarnnam(nam, "could not accept connection: %e", NULL, errno); + tcp_close(sess); + return 1; + } + + /* move the fd since it doesn't seem to be closing well */ + sess->fd = movefd(sess->fd); + + err = close(sess->fd); + if (err) + { + zwarn("listener close failed: %e", NULL, errno); + return -1; + } + sess->fd = rfd; + + fprintf(shout, "%d is on fd %d\n", ntohs(sess->peer.in.sin_port), sess->fd); + + return 0; + + } else { if (!args[0]) { for(sess = zts_head(); sess != NULL; sess = zts_next(sess)) { - if(sess->fd != -1) + if (sess->fd != -1) { - zthost = gethostbyaddr(&(sess->peer.in.sin_addr), sizeof(struct sockaddr_in), AF_INET); - if(zthost) fprintf(shout, "%s:%d is on fd %d%s\n", zthost->h_name, ntohs(sess->peer.in.sin_port), sess->fd, (sess->flags & ZTCP_ZFTP) ? " ZFTP" : ""); - else fprintf(shout, "%s:%d is on fd %d%s\n", "UNKNOWN", sess->peer.in.sin_port, sess->fd, (sess->flags & ZTCP_ZFTP) ? " ZFTP" : ""); + zthost = gethostbyaddr(&(sess->sock.in.sin_addr), sizeof(struct sockaddr_in), AF_INET); + if (zthost) + localname = zthost->h_name; + else + localname = ztrdup(inet_ntoa(sess->sock.in.sin_addr)); + ztpeer = gethostbyaddr(&(sess->peer.in.sin_addr), sizeof(struct sockaddr_in), AF_INET); + if (ztpeer) + remotename = ztpeer->h_name; + else + remotename = ztrdup(inet_ntoa(sess->sock.in.sin_addr)); + fprintf(shout, "%s:%d -> %s:%d is on fd %d%s%s\n", localname, ntohs(sess->sock.in.sin_port), remotename, ntohs(sess->peer.in.sin_port), sess->fd, (sess->flags & ZTCP_ZFTP) ? " ZFTP" : "", (sess->flags & ZTCP_INBOUND) ? "INBOUND" : ""); } } return 0; @@ -448,15 +525,17 @@ bin_ztcp(char *nam, char **args, char *ops, int func) } sess = tcp_socket(PF_INET, SOCK_STREAM, 0, 0); + + if (!sess) { + zwarnnam(nam, "unable to allocate a TCP session slot", NULL, 0); + return 1; + } + #ifdef SO_OOBINLINE len = 1; setsockopt(sess->fd, SOL_SOCKET, SO_OOBINLINE, (char *)&len, sizeof(len)); #endif - if(!sess) { - zwarnnam(nam, "unable to allocate a TCP session slot", NULL, 0); - return 1; - } if (sess->fd < 0) { zwarnnam(nam, "socket creation failed: %e", NULL, errno); zsfree(desthost); @@ -465,18 +544,18 @@ bin_ztcp(char *nam, char **args, char *ops, int func) } for (addrp = zthost->h_addr_list; err && *addrp; addrp++) { - if(zthost->h_length != 4) + if (zthost->h_length != 4) zwarnnam(nam, "address length mismatch", NULL, 0); do { err = tcp_connect(sess, *addrp, zthost, htons(destport)); } while (err && errno == EINTR && !errflag); } - if(err) + if (err) zwarnnam(nam, "connection failed: %e", NULL, errno); else { - if(verbose) + if (verbose) fprintf(shout, "%s:%d is now on fd %d\n", desthost, destport, sess->fd); else fprintf(shout, "%d\n", sess->fd); @@ -490,7 +569,7 @@ bin_ztcp(char *nam, char **args, char *ops, int func) } static struct builtin bintab[] = { - BUILTIN("ztcp", 0, bin_ztcp, 0, 2, 0, "c", NULL), + BUILTIN("ztcp", 0, bin_ztcp, 0, 2, 0, "cflv", NULL), }; /* The load/unload routines required by the zsh library interface */ |