Mercurial > dropbear

annotate listener.c @ 28:45ee5ffd6ea0

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author Matt Johnston <matt@ucc.asn.au>
date Tue, 27 Jul 2004 09:19:12 +0000
parents db2c8e6fb284
children 20563735e8b5
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1 #include "includes.h"
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2 #include "listener.h"
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3 #include "session.h"
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4 #include "dbutil.h"
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5
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6 void listeners_initialise() {
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8 /* just one slot to start with */
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9 ses.listeners = (struct Listener**)m_malloc(sizeof(struct Listener*));
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10 ses.listensize = 1;
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11 ses.listeners[0] = NULL;
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13 }
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15 void set_listener_fds(fd_set * readfds) {
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17 unsigned int i;
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18 struct Listener *listener;
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20 /* check each in turn */
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21 for (i = 0; i < ses.listensize; i++) {
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22 listener = ses.listeners[i];
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23 if (listener != NULL) {
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24 TRACE(("set listener fd %d", listener->sock));
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25 FD_SET(listener->sock, readfds);
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26 }
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27 }
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28 }
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31 void handle_listeners(fd_set * readfds) {
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33 unsigned int i;
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34 struct Listener *listener;
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36 /* check each in turn */
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37 for (i = 0; i < ses.listensize; i++) {
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38 listener = ses.listeners[i];
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39 if (listener != NULL) {
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40 TRACE(("handle listener num %d fd %d", i, listener->sock));
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41 if (FD_ISSET(listener->sock, readfds)) {
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42 listener->accepter(listener);
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43 }
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44 }
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45 }
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46 }
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49 /* accepter(int fd, void* typedata) is a function to accept connections,
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50 * cleanup(void* typedata) happens when cleaning up */
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51 struct Listener* new_listener(int sock, int type, void* typedata,
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52 void (*accepter)(struct Listener*),
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53 void (*cleanup)(struct Listener*)) {
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54
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55 unsigned int i, j;
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56 struct Listener *newlisten = NULL;
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57 /* try get a new structure to hold it */
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58 for (i = 0; i < ses.listensize; i++) {
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59 if (ses.listeners[i] == NULL) {
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60 break;
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61 }
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62 }
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64 /* or create a new one */
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65 if (i == ses.listensize) {
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66 if (ses.listensize > MAX_LISTENERS) {
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67 TRACE(("leave newlistener: too many already"));
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68 close(sock);
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69 return NULL;
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70 }
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71
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72 ses.listeners = (struct Listener**)m_realloc(ses.listeners,
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73 (ses.listensize+LISTENER_EXTEND_SIZE)
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74 *sizeof(struct Listener*));
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76 ses.listensize += LISTENER_EXTEND_SIZE;
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77
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78 for (j = i; j < ses.listensize; j++) {
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79 ses.listeners[j] = NULL;
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80 }
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81 }
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82
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83 ses.maxfd = MAX(ses.maxfd, sock);
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84
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85 TRACE(("new listener num %d fd %d", i, sock));
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86
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87 newlisten = (struct Listener*)m_malloc(sizeof(struct Listener));
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88 newlisten->index = i;
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89 newlisten->type = type;
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90 newlisten->typedata = typedata;
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91 newlisten->sock = sock;
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92 newlisten->accepter = accepter;
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93 newlisten->cleanup = cleanup;
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94
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95 ses.listeners[i] = newlisten;
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96 return newlisten;
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97 }
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98
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99 /* Return the first listener which matches the type-specific comparison
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100 * function. Particularly needed for global requests, like tcp */
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101 struct Listener * get_listener(int type, void* typedata,
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102 int (*match)(void*, void*)) {
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103
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104 unsigned int i;
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105 struct Listener* listener;
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106
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107 for (i = 0, listener = ses.listeners[i]; i < ses.listensize; i++) {
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108 if (listener->type == type
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109 && match(typedata, listener->typedata)) {
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110 return listener;
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111 }
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112 }
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113
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114 return NULL;
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115 }
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116
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117 void remove_listener(struct Listener* listener) {
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118
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119 if (listener->cleanup) {
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120 listener->cleanup(listener);
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121 }
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122
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123 close(listener->sock);
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124 ses.listeners[listener->index] = NULL;
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125 m_free(listener);
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126
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127 }