diff options
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/ftpgetput.c | 2 | ||||
| -rw-r--r-- | networking/nc.c | 103 | ||||
| -rw-r--r-- | networking/wget.c | 2 |
3 files changed, 51 insertions, 56 deletions
diff --git a/networking/ftpgetput.c b/networking/ftpgetput.c index 51e2302..0e2d417 100644 --- a/networking/ftpgetput.c +++ b/networking/ftpgetput.c @@ -88,7 +88,7 @@ static int xconnect_ftpdata(ftp_host_info_t *server, char *buf) *buf_ptr = '\0'; port_num += xatoul_range(buf_ptr + 1, 0, 255) * 256; - set_port(server->lsa, htons(port_num)); + set_nport(server->lsa, htons(port_num)); return xconnect_stream(server->lsa); } diff --git a/networking/nc.c b/networking/nc.c index e1c2283..37e658d 100644 --- a/networking/nc.c +++ b/networking/nc.c @@ -9,6 +9,10 @@ #include "busybox.h" +/* Lots of small differences in features + * when compared to "standard" nc + */ + static void timeout(int signum) { bb_error_msg_and_die("timed out"); @@ -16,7 +20,8 @@ static void timeout(int signum) int nc_main(int argc, char **argv) { - int sfd = 0; + /* sfd sits _here_ only because of "repeat" option (-l -l). */ + int sfd = sfd; /* for gcc */ int cfd = 0; SKIP_NC_SERVER(const) unsigned do_listen = 0; SKIP_NC_SERVER(const) unsigned lport = 0; @@ -24,12 +29,10 @@ int nc_main(int argc, char **argv) SKIP_NC_EXTRA (const) unsigned delay = 0; SKIP_NC_EXTRA (const int execparam = 0;) USE_NC_EXTRA (char **execparam = NULL;) - struct sockaddr_in address; + len_and_sockaddr *lsa; fd_set readfds, testfds; int opt; /* must be signed (getopt returns -1) */ - memset(&address, 0, sizeof(address)); - if (ENABLE_NC_SERVER || ENABLE_NC_EXTRA) { /* getopt32 is _almost_ usable: ** it cannot handle "... -e prog -prog-opt" */ @@ -39,7 +42,6 @@ int nc_main(int argc, char **argv) if (ENABLE_NC_SERVER && opt=='l') USE_NC_SERVER(do_listen++); else if (ENABLE_NC_SERVER && opt=='p') { USE_NC_SERVER(lport = bb_lookup_port(optarg, "tcp", 0)); - USE_NC_SERVER(lport = htons(lport)); } else if (ENABLE_NC_EXTRA && opt=='w') USE_NC_EXTRA( wsecs = xatou(optarg)); else if (ENABLE_NC_EXTRA && opt=='i') USE_NC_EXTRA( delay = xatou(optarg)); @@ -71,9 +73,11 @@ int nc_main(int argc, char **argv) // -l and -f don't mix if (do_listen && cfd) bb_show_usage(); // Listen or file modes need zero arguments, client mode needs 2 - opt = ((do_listen || cfd) ? 0 : 2); - if (argc != opt) - bb_show_usage(); + if (do_listen || cfd) { + if (argc) bb_show_usage(); + } else { + if (!argc || argc > 2) bb_show_usage(); + } } else { if (argc != 3) bb_show_usage(); argc--; @@ -86,46 +90,37 @@ int nc_main(int argc, char **argv) } if (!cfd) { - sfd = xsocket(AF_INET, SOCK_STREAM, 0); - fcntl(sfd, F_SETFD, FD_CLOEXEC); - setsockopt_reuseaddr(sfd); - address.sin_family = AF_INET; - - // Set local port. - - if (lport != 0) { - address.sin_port = lport; - xbind(sfd, (struct sockaddr *) &address, sizeof(address)); - } - if (do_listen) { - socklen_t addrlen = sizeof(address); - - xlisten(sfd, do_listen); - - // If we didn't specify a port number, query and print it to stderr. - + socklen_t addrlen; + + /* create_and_bind_stream_or_die(NULL, lport) + * would've work wonderfully, but we need + * to know lsa */ + sfd = xsocket_stream(&lsa); + if (lport) + set_nport(lsa, htons(lport)); + setsockopt_reuseaddr(sfd); + xbind(sfd, &lsa->sa, lsa->len); + xlisten(sfd, do_listen); /* can be > 1 */ + /* If we didn't specify a port number, + * query and print it after listen() */ if (!lport) { - socklen_t len = sizeof(address); - getsockname(sfd, (struct sockaddr *) &address, &len); - fdprintf(2, "%d\n", SWAP_BE16(address.sin_port)); + addrlen = lsa->len; + getsockname(sfd, &lsa->sa, &addrlen); + lport = get_nport(lsa); + fdprintf(2, "%d\n", ntohs(lport)); } - repeatyness: - cfd = accept(sfd, (struct sockaddr *) &address, &addrlen); + fcntl(sfd, F_SETFD, FD_CLOEXEC); + accept_again: + addrlen = lsa->len; + cfd = accept(sfd, NULL, 0); /* &lsa->sa, &addrlen); */ if (cfd < 0) bb_perror_msg_and_die("accept"); - - if (!execparam) close(sfd); + if (!execparam) + close(sfd); } else { - struct hostent *hostinfo; - hostinfo = xgethostbyname(argv[0]); - - address.sin_addr = *(struct in_addr *) *hostinfo->h_addr_list; - address.sin_port = bb_lookup_port(argv[1], "tcp", 0); - address.sin_port = htons(address.sin_port); - - xconnect(sfd, (struct sockaddr *) &address, sizeof(address)); - cfd = sfd; + cfd = create_and_connect_stream_or_die(argv[0], + argv[1] ? bb_lookup_port(argv[1], "tcp", 0) : 0); } } @@ -136,17 +131,10 @@ int nc_main(int argc, char **argv) /* -e given? */ if (execparam) { - if (cfd) { - signal(SIGCHLD, SIG_IGN); - dup2(cfd, 0); - close(cfd); - } - dup2(0, 1); - dup2(0, 2); - + signal(SIGCHLD, SIG_IGN); // With more than one -l, repeatedly act as server. - if (do_listen > 1 && vfork()) { + /* parent */ // This is a bit weird as cleanup goes, since we wind up with no // stdin/stdout/stderr. But it's small and shouldn't hurt anything. // We check for cfd == 0 above. @@ -154,9 +142,15 @@ int nc_main(int argc, char **argv) close(0); close(1); close(2); - - goto repeatyness; + goto accept_again; } + /* child (or main thread if no multiple -l) */ + if (cfd) { + dup2(cfd, 0); + close(cfd); + } + dup2(0, 1); + dup2(0, 2); USE_NC_EXTRA(execvp(execparam[0], execparam);) /* Don't print stuff or it will go over the wire.... */ _exit(127); @@ -184,7 +178,8 @@ int nc_main(int argc, char **argv) sizeof(bb_common_bufsiz1)); if (fd == cfd) { - if (nread<1) exit(0); + if (nread < 1) + exit(0); ofd = STDOUT_FILENO; } else { if (nread<1) { diff --git a/networking/wget.c b/networking/wget.c index 22e6106..cc768db 100644 --- a/networking/wget.c +++ b/networking/wget.c @@ -432,7 +432,7 @@ int wget_main(int argc, char **argv) s = strrchr(buf, ','); if (!s) goto pasv_error; port += xatou_range(s+1, 0, 255) * 256; - set_port(lsa, htons(port)); + set_nport(lsa, htons(port)); dfp = open_socket(lsa); if (beg_range) { |