struct sockaddr_in addr; lfd = socket(AF_INET, SOCK_STREAM, 0); if (lfd == -1) { perror ... char *address) { int cfd; struct sockaddr_in addr; cfd = socket(AF_INET, SOCK_STREAMwhose index is given in addr , placing a copy of the entry into the struct ... whose index is given in addr , assigning it the data supplied in the struct useraddr . The format of the address in addr is determined by the address spacemapping is specified in addr . The length argument specifies the length of the mapping (whichmapping is specified in addr . The length argument specifies the length of the mapping (whichcast the structure pointer passed in addr in order to avoid compiler warnings. See EXAMPLESwill be placed. The values specified in addr and size should be multiplesstruct mmsghdr msg[2]; struct sockaddr_in addr; sockfd = socket(AF_INET, SOCK_DGRAMVLEN]; struct timespec timeout; struct sockaddr_in addr; sockfd = socket(AF_INET, SOCK_DGRAMpolicy governing the memory address given in addr . This policy may be different from