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Functions | |
| int | read_interface (char *interface, int *ifindex, u_int32_t *addr, unsigned char *arp) |
| int | listen_socket (unsigned int ip, int port, char *inf) |
| int | raw_socket (int ifindex) |
| int listen_socket | ( | unsigned int | ip, | |
| int | port, | |||
| char * | inf | |||
| ) |
Definition at line 93 of file socket.c.
References DEBUG, LOG_ERR, and LOG_INFO.
Referenced by udhcp().
00094 { 00095 struct ifreq interface; 00096 int fd; 00097 struct sockaddr_in addr; 00098 int n = 1; 00099 00100 DEBUG(LOG_INFO, "Opening listen socket on 0x%08x:%d %s\n", ip, port, inf); 00101 if ((fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) { 00102 DEBUG(LOG_ERR, "socket call failed: %s", strerror(errno)); 00103 return -1; 00104 } 00105 00106 memset(&addr, 0, sizeof(addr)); 00107 addr.sin_family = AF_INET; 00108 addr.sin_port = htons(port); 00109 addr.sin_addr.s_addr = ip; 00110 00111 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &n, sizeof(n)) == -1) { 00112 close(fd); 00113 return -1; 00114 } 00115 if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, (char *) &n, sizeof(n)) == -1) { 00116 close(fd); 00117 return -1; 00118 } 00119 00120 strncpy(interface.ifr_ifrn.ifrn_name, inf, IFNAMSIZ); 00121 if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,(char *)&interface, sizeof(interface)) < 0) { 00122 close(fd); 00123 return -1; 00124 } 00125 00126 if (bind(fd, (struct sockaddr *)&addr, sizeof(struct sockaddr)) == -1) { 00127 close(fd); 00128 return -1; 00129 } 00130 00131 return fd; 00132 }
| int raw_socket | ( | int | ifindex | ) |
Definition at line 135 of file socket.c.
References DEBUG, LOG_ERR, and LOG_INFO.
Referenced by udhcp().
00136 { 00137 int fd; 00138 struct sockaddr_ll sock; 00139 00140 DEBUG(LOG_INFO, "Opening raw socket on ifindex %d\n", ifindex); 00141 if ((fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) { 00142 DEBUG(LOG_ERR, "socket call failed: %s", strerror(errno)); 00143 return -1; 00144 } 00145 00146 sock.sll_family = AF_PACKET; 00147 sock.sll_protocol = htons(ETH_P_IP); 00148 sock.sll_ifindex = ifindex; 00149 if (bind(fd, (struct sockaddr *) &sock, sizeof(sock)) < 0) { 00150 DEBUG(LOG_ERR, "bind call failed: %s", strerror(errno)); 00151 close(fd); 00152 return -1; 00153 } 00154 00155 return fd; 00156 }
| int read_interface | ( | char * | interface, | |
| int * | ifindex, | |||
| u_int32_t * | addr, | |||
| unsigned char * | arp | |||
| ) |
Definition at line 46 of file socket.c.
References DEBUG, LOG, LOG_ERR, and LOG_INFO.
Referenced by udhcp().
00047 { 00048 int fd; 00049 struct ifreq ifr; 00050 struct sockaddr_in *our_ip; 00051 00052 memset(&ifr, 0, sizeof(struct ifreq)); 00053 if((fd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) >= 0) { 00054 ifr.ifr_addr.sa_family = AF_INET; 00055 strcpy(ifr.ifr_name, interface); 00056 00057 if (addr) { 00058 if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) { 00059 our_ip = (struct sockaddr_in *) &ifr.ifr_addr; 00060 *addr = our_ip->sin_addr.s_addr; 00061 DEBUG(LOG_INFO, "%s (our ip) = %s", ifr.ifr_name, inet_ntoa(our_ip->sin_addr)); 00062 } else { 00063 LOG(LOG_ERR, "SIOCGIFADDR failed, is the interface up and configured?: %s", 00064 strerror(errno)); 00065 return -1; 00066 } 00067 } 00068 00069 if (ioctl(fd, SIOCGIFINDEX, &ifr) == 0) { 00070 DEBUG(LOG_INFO, "adapter index %d", ifr.ifr_ifindex); 00071 *ifindex = ifr.ifr_ifindex; 00072 } else { 00073 LOG(LOG_ERR, "SIOCGIFINDEX failed!: %s", strerror(errno)); 00074 return -1; 00075 } 00076 if (ioctl(fd, SIOCGIFHWADDR, &ifr) == 0) { 00077 memcpy(arp, ifr.ifr_hwaddr.sa_data, 6); 00078 DEBUG(LOG_INFO, "adapter hardware address %02x:%02x:%02x:%02x:%02x:%02x", 00079 arp[0], arp[1], arp[2], arp[3], arp[4], arp[5]); 00080 } else { 00081 LOG(LOG_ERR, "SIOCGIFHWADDR failed!: %s", strerror(errno)); 00082 return -1; 00083 } 00084 } else { 00085 LOG(LOG_ERR, "socket failed!: %s", strerror(errno)); 00086 return -1; 00087 } 00088 close(fd); 00089 return 0; 00090 }
1.5.1