FreeCalypso > hg > themwi-system-sw
annotate librtpalloc/rtpmgr_resp.c @ 262:f1c024b2b835
smpp-trx-sa/log.c: additional cleanup
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 11 Oct 2023 21:21:34 -0800 |
parents | f8c40090a0a8 |
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rev | line source |
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librtpalloc: new library for talking to themwi-rtp-mgr
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1 /* |
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2 * Here we implement the collect_rtpmgr_resp() function, |
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3 * which is a wrapper around the mess of recvmsg |
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4 * with file descriptor passing. |
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5 */ |
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6 |
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7 #include <sys/types.h> |
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8 #include <sys/socket.h> |
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9 #include <stdint.h> |
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10 #include <string.h> |
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11 #include <strings.h> |
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12 #include "../include/rtp_alloc.h" |
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13 #include "rtpmgr_resp.h" |
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14 |
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15 collect_rtpmgr_resp(ctrl_fd, recv_flags, out) |
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16 struct rtp_alloc_resp_wrap *out; |
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17 { |
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18 int rc; |
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19 struct iovec iov; |
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20 struct msghdr msg; |
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21 union { |
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22 char buf[CMSG_SPACE(sizeof(int) * 4)]; |
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23 struct cmsghdr align; |
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24 } cmsgu; |
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25 struct cmsghdr *cmsg; |
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26 |
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27 iov.iov_base = &out->resp; |
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28 iov.iov_len = sizeof(struct rtp_alloc_resp); |
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29 bzero(&msg, sizeof msg); |
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30 msg.msg_iov = &iov; |
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31 msg.msg_iovlen = 1; |
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32 msg.msg_control = cmsgu.buf; |
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33 msg.msg_controllen = CMSG_SPACE(sizeof(int) * 4); |
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34 rc = recvmsg(ctrl_fd, &msg, recv_flags); |
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35 if (rc < 0) |
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36 return rc; |
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37 out->resp_len = rc; |
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38 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) { |
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39 if (cmsg->cmsg_level == SOL_SOCKET && |
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40 cmsg->cmsg_type == SCM_RIGHTS) |
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41 break; |
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42 } |
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43 if (cmsg) { |
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44 switch (cmsg->cmsg_len) { |
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45 case CMSG_LEN(sizeof(int)): |
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46 out->num_fd = 1; |
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47 break; |
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48 case CMSG_LEN(sizeof(int) * 2): |
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49 out->num_fd = 2; |
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50 break; |
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51 case CMSG_LEN(sizeof(int) * 3): |
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52 out->num_fd = 3; |
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53 break; |
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54 case CMSG_LEN(sizeof(int) * 4): |
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55 out->num_fd = 4; |
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56 break; |
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57 default: |
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58 out->num_fd = 0; |
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59 } |
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60 if (out->num_fd) |
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61 bcopy(CMSG_DATA(cmsg), out->fd_buf, |
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62 sizeof(int) * out->num_fd); |
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63 } else |
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64 out->num_fd = 0; |
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65 return 0; |
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66 } |