| 1 | /* |
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| 2 | * kadm_net.c |
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| 3 | * |
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| 4 | * Copyright 1988 by the Massachusetts Institute of Technology. |
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| 5 | * |
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| 6 | * For copying and distribution information, please see the file |
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| 7 | * <mit-copyright.h>. |
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| 8 | * |
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| 9 | * Kerberos administration server client-side network access routines |
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| 10 | * These routines do actual network traffic, in a machine dependent manner. |
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| 11 | */ |
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| 12 | |
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| 13 | #include <mit-copyright.h> |
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| 14 | |
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| 15 | #define DEFINE_SOCKADDR /* Ask krb.h for struct sockaddr, etc */ |
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| 16 | #include "krb.h" |
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| 17 | |
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| 18 | #include <errno.h> |
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| 19 | #include <signal.h> |
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| 20 | #include <kadm.h> |
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| 21 | #include <kadm_err.h> |
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| 22 | #include <krbports.h> |
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| 23 | |
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| 24 | #ifndef NULL |
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| 25 | #define NULL 0 |
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| 26 | #endif |
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| 27 | |
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| 28 | #ifdef _WINDOWS |
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| 29 | #define SIGNAL(s, f) 0 |
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| 30 | #endif |
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| 31 | |
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| 32 | #ifndef _WINDOWS |
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| 33 | #define SIGNAL(s, f) signal(s, f) |
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| 34 | extern int errno; |
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| 35 | #endif |
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| 36 | |
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| 37 | |
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| 38 | extern Kadm_Client client_parm; |
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| 39 | extern int default_client_port; |
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| 40 | |
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| 41 | static sigtype (*opipe)(); |
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| 42 | |
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| 43 | int kadm_cli_conn() |
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| 44 | { /* this connects and sets my_addr */ |
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| 45 | int on = 1; |
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| 46 | |
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| 47 | if ((client_parm.admin_fd = |
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| 48 | socket(client_parm.admin_addr.sin_family, SOCK_STREAM,0)) < 0) |
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| 49 | return KADM_NO_SOCK; /* couldnt create the socket */ |
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| 50 | if (connect(client_parm.admin_fd, |
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| 51 | (struct sockaddr *) & client_parm.admin_addr, |
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| 52 | sizeof(client_parm.admin_addr))) { |
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| 53 | (void) closesocket(client_parm.admin_fd); |
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| 54 | client_parm.admin_fd = -1; |
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| 55 | |
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| 56 | /* The V4 kadmind port number is 751. The RFC assigned |
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| 57 | number, for V5, is 749. Sometimes the entry in |
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| 58 | /etc/services on a client machine will say 749, but the |
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| 59 | server may be listening on port 751. We try to partially |
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| 60 | cope by automatically falling back to try port 751 if we |
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| 61 | don't get a reply on port we are using. */ |
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| 62 | if (client_parm.admin_addr.sin_port != htons(KADM_PORT) |
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| 63 | && default_client_port) { |
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| 64 | client_parm.admin_addr.sin_port = htons(KADM_PORT); |
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| 65 | return kadm_cli_conn(); |
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| 66 | } |
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| 67 | |
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| 68 | return KADM_NO_CONN; /* couldnt get the connect */ |
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| 69 | } |
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| 70 | opipe = SIGNAL(SIGPIPE, SIG_IGN); |
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| 71 | client_parm.my_addr_len = sizeof(client_parm.my_addr); |
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| 72 | if (getsockname(client_parm.admin_fd, |
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| 73 | (struct sockaddr *) & client_parm.my_addr, |
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| 74 | &client_parm.my_addr_len) < 0) { |
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| 75 | (void) closesocket(client_parm.admin_fd); |
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| 76 | client_parm.admin_fd = -1; |
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| 77 | (void) SIGNAL(SIGPIPE, opipe); |
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| 78 | return KADM_NO_HERE; /* couldnt find out who we are */ |
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| 79 | } |
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| 80 | if (setsockopt(client_parm.admin_fd, SOL_SOCKET, SO_KEEPALIVE, (char *)&on, |
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| 81 | sizeof(on)) < 0) { |
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| 82 | (void) closesocket(client_parm.admin_fd); |
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| 83 | client_parm.admin_fd = -1; |
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| 84 | (void) SIGNAL(SIGPIPE, opipe); |
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| 85 | return KADM_NO_CONN; /* XXX */ |
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| 86 | } |
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| 87 | return KADM_SUCCESS; |
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| 88 | } |
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| 89 | |
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| 90 | void kadm_cli_disconn() |
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| 91 | { |
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| 92 | (void) closesocket(client_parm.admin_fd); |
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| 93 | (void) SIGNAL(SIGPIPE, opipe); |
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| 94 | return; |
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| 95 | } |
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| 96 | |
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| 97 | int kadm_cli_out(dat, dat_len, ret_dat, ret_siz) |
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| 98 | u_char *dat; |
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| 99 | int dat_len; |
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| 100 | u_char **ret_dat; |
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| 101 | int *ret_siz; |
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| 102 | { |
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| 103 | u_short dlen; |
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| 104 | int retval; |
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| 105 | extern char *malloc(); |
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| 106 | |
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| 107 | dlen = (u_short) dat_len; |
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| 108 | |
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| 109 | if (dat_len != (int)dlen) |
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| 110 | return (KADM_NO_ROOM); |
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| 111 | |
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| 112 | dlen = htons(dlen); |
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| 113 | if (krb_net_write(client_parm.admin_fd, (char *) &dlen, |
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| 114 | sizeof(u_short)) < 0) |
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| 115 | return (SOCKET_ERRNO); /* XXX */ |
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| 116 | |
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| 117 | if (krb_net_write(client_parm.admin_fd, (char *) dat, dat_len) < 0) |
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| 118 | return (SOCKET_ERRNO); /* XXX */ |
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| 119 | |
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| 120 | if (retval = krb_net_read(client_parm.admin_fd, (char *) &dlen, |
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| 121 | sizeof(u_short)) != sizeof(u_short)) { |
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| 122 | if (retval < 0) |
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| 123 | return(SOCKET_ERRNO); /* XXX */ |
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| 124 | else |
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| 125 | return(EPIPE); /* short read ! */ |
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| 126 | } |
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| 127 | |
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| 128 | dlen = ntohs(dlen); |
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| 129 | *ret_dat = (u_char *)malloc((unsigned)dlen); |
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| 130 | if (!*ret_dat) |
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| 131 | return(KADM_NOMEM); |
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| 132 | |
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| 133 | if (retval = krb_net_read(client_parm.admin_fd, (char *) *ret_dat, |
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| 134 | (int) dlen) != dlen) { |
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| 135 | if (retval < 0) |
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| 136 | return(SOCKET_ERRNO); /* XXX */ |
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| 137 | else |
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| 138 | return(EPIPE); /* short read ! */ |
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| 139 | } |
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| 140 | *ret_siz = (int) dlen; |
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| 141 | return KADM_SUCCESS; |
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| 142 | } |
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