X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=dccp_recv.c;h=796a7e6baf76fe15041386041e21d403b4c58cf0;hp=647d31a671c4e87fb0eb999385cf21379374b10e;hb=e8ca7526ddebc98f3023736f77fa13b65034767b;hpb=ed0c68b07ddbc130e033035baa1cc0862e511b46 diff --git a/dccp_recv.c b/dccp_recv.c index 647d31a6..796a7e6b 100644 --- a/dccp_recv.c +++ b/dccp_recv.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2006-2009 Andre Noll + * Copyright (C) 2006-2014 Andre Noll * * Licensed under the GPL v2. For licencing details see COPYING. */ @@ -11,58 +11,57 @@ * (C) 2005 Ian McDonald */ +#include +#include #include #include -#include +#include +#include +#include #include "para.h" #include "error.h" #include "list.h" #include "sched.h" #include "ggo.h" +#include "buffer_tree.h" #include "recv.h" #include "string.h" #include "net.h" #include "fd.h" -#include "buffer_tree.h" #include "dccp_recv.cmdline.h" -/** - * data specific to the dccp receiver - * - * \sa receiver receiver_node - */ -struct private_dccp_recv_data { - /** the file descriptor for the dccp socket */ - int fd; - struct btr_pool *btrp; -}; - - static void dccp_recv_close(struct receiver_node *rn) { - - struct private_dccp_recv_data *pdd = rn->private_data; - - if (pdd && pdd->fd > 0) - close(pdd->fd); - btr_pool_free(pdd->btrp); - free(rn->private_data); - rn->private_data = NULL; + if (rn->fd > 0) + close(rn->fd); + btr_pool_free(rn->btrp); } - static int dccp_recv_open(struct receiver_node *rn) { - struct private_dccp_recv_data *pdd; struct dccp_recv_args_info *conf = rn->conf; - int fd, ret = makesock(AF_UNSPEC, IPPROTO_DCCP, 0, conf->host_arg, - conf->port_arg, NULL); + struct flowopts *fo = NULL; + uint8_t *ccids = NULL; + int fd, ret, i; - if (ret < 0) - return ret; - fd = ret; + /* Copy CCID preference list (u8 array required) */ + if (conf->ccid_given) { + ccids = para_malloc(conf->ccid_given); + fo = flowopt_new(); + + for (i = 0; i < conf->ccid_given; i++) + ccids[i] = conf->ccid_arg[i]; + + OPT_ADD(fo, SOL_DCCP, DCCP_SOCKOPT_CCID, ccids, i); + } + + fd = makesock(IPPROTO_DCCP, 0, conf->host_arg, conf->port_arg, fo); + flowopt_cleanup(fo); + free(ccids); + if (fd < 0) + return fd; /* * Disable unused CCIDs: the receiver does not send any application * data to the server. By shutting down this unused path we reduce @@ -76,70 +75,91 @@ static int dccp_recv_open(struct receiver_node *rn) ret = mark_fd_nonblocking(fd); if (ret < 0) goto err; - rn->private_data = pdd = para_calloc(sizeof(struct private_dccp_recv_data)); - pdd->btrp = btr_pool_new("dccp_recv", 320 * 1024); - pdd->fd = fd; + rn->btrp = btr_pool_new("dccp_recv", 320 * 1024); + rn->fd = fd; return 1; err: close(fd); return ret; } +/** + * Check whether the host supports the requested 'ccid' arguments. + * \param conf DCCP receiver arguments. + * \return True if all CCIDs requested in \a conf are supported. + */ +static bool dccp_recv_ccid_support_check(struct dccp_recv_args_info *conf) +{ + uint8_t *ccids; + int i, j, nccids; + + nccids = dccp_available_ccids(&ccids); + if (nccids <= 0) + return false; + + for (i = 0; i < conf->ccid_given; i++) { + for (j = 0; j < nccids && ccids[j] != conf->ccid_arg[i]; j++) + ; + if (j == nccids) { + PARA_ERROR_LOG("'CCID-%d' not supported on this host.\n", + conf->ccid_arg[i]); + return false; + } + } + return true; +} + static void *dccp_recv_parse_config(int argc, char **argv) { - struct dccp_recv_args_info *tmp = para_calloc(sizeof(struct dccp_recv_args_info)); + struct dccp_recv_args_info *tmp = para_calloc(sizeof(*tmp)); - if (!dccp_recv_cmdline_parser(argc, argv, tmp)) - return tmp; - free(tmp); - return NULL; + dccp_recv_cmdline_parser(argc, argv, tmp); + if (!dccp_recv_ccid_support_check(tmp)) + exit(EXIT_FAILURE); + return tmp; } static void dccp_recv_pre_select(struct sched *s, struct task *t) { struct receiver_node *rn = container_of(t, struct receiver_node, task); - struct private_dccp_recv_data *pdd = rn->private_data; t->error = 0; if (generic_recv_pre_select(s, t) <= 0) return; - para_fd_set(pdd->fd, &s->rfds, &s->max_fileno); + para_fd_set(rn->fd, &s->rfds, &s->max_fileno); } -static void dccp_recv_post_select(struct sched *s, struct task *t) +static int dccp_recv_post_select(struct sched *s, struct task *t) { struct receiver_node *rn = container_of(t, struct receiver_node, task); - struct private_dccp_recv_data *pdd = rn->private_data; struct btr_node *btrn = rn->btrn; struct iovec iov[2]; int ret, iovcnt; + size_t num_bytes; - ret = btr_node_status(btrn, 0, BTR_NT_ROOT); + ret = task_get_notification(t); if (ret < 0) - goto err; - if (ret == 0) - return; - if (!FD_ISSET(pdd->fd, &s->rfds)) - return; /* nothing to do */ - iovcnt = btr_pool_get_buffers(pdd->btrp, iov); + goto out; + ret = btr_node_status(btrn, 0, BTR_NT_ROOT); + if (ret <= 0) + goto out; + iovcnt = btr_pool_get_buffers(rn->btrp, iov); ret = -E_DCCP_OVERRUN; if (iovcnt == 0) - goto err; - ret = para_readv(pdd->fd, iov, iovcnt); - if (ret == 0) - ret = -E_RECV_EOF; - if (ret < 0) - goto err; - if (ret <= iov[0].iov_len) /* only the first buffer was filled */ - btr_add_output_pool(pdd->btrp, ret, btrn); + goto out; + ret = readv_nonblock(rn->fd, iov, iovcnt, &s->rfds, &num_bytes); + if (num_bytes == 0) + goto out; + if (num_bytes <= iov[0].iov_len) /* only the first buffer was filled */ + btr_add_output_pool(rn->btrp, num_bytes, btrn); else { /* both buffers contain data */ - btr_add_output_pool(pdd->btrp, iov[0].iov_len, btrn); - btr_add_output_pool(pdd->btrp, ret - iov[0].iov_len, btrn); + btr_add_output_pool(rn->btrp, iov[0].iov_len, btrn); + btr_add_output_pool(rn->btrp, num_bytes - iov[0].iov_len, btrn); } - return; -err: - btr_remove_node(rn->btrn); - t->error = ret; +out: + if (ret < 0) + btr_remove_node(&rn->btrn); + return ret; } static void dccp_recv_free_config(void *conf) @@ -166,9 +186,6 @@ void dccp_recv_init(struct receiver *r) r->post_select = dccp_recv_post_select; r->parse_config = dccp_recv_parse_config; r->free_config = dccp_recv_free_config; - r->help = (struct ggo_help) { - .short_help = dccp_recv_args_info_help, - .detailed_help = dccp_recv_args_info_detailed_help - }; + r->help = (struct ggo_help)DEFINE_GGO_HELP(dccp_recv); dccp_recv_cmdline_parser_free(&dummy); }